JP3253949B2 - Anti-adhesion material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a material for preventing adhesion between a hydraulic composition such as cement and a support such as H-section steel. More specifically, the present invention provides, for example, a hydraulic composition that suppresses friction and adhesion between H-section steel and steel sheet pile embedded or contacted with a hydraulic composition so that they can be more easily pulled out or separated and removed. The present invention relates to a material for preventing adhesion between a cured product of a composition and a support.

[0002]

2. Description of the Related Art Generally, when constructing a ground foundation structure as a structure such as an earth retaining wall in foundation work in the construction field and the civil engineering field, first, excavation is performed with an auger to form a drill hole. In practice, a hydraulic composition such as cement milk or ready-mixed concrete is injected while excavating. Next, for example, H is added to the hydraulic composition injected into the borehole.
After embedding (implanting) a shape steel as a core material (temporary embedding material), the hydraulic composition is hardened. It is desired that the H-shaped steel be pulled out of the hardened material after the completion of the target construction and removed from the hardened material so as not to hinder the construction (development) of the basement for lease or in a later year. I have.

[0003] However, the H-section steel and the cured product of the hydraulic composition are firmly adhered to each other. In order to remove the H-section steel after construction is completed, the work of pulling out the H-section steel from the hardened product requires the following steps. Since considerable labor (tensile force) for overcoming the adhesive strength (adhesive strength) is required, equipment, cost, days and the like are required.

Therefore, in order to facilitate the above-mentioned drawing operation, conventionally, i) a method of applying a lubricant such as wax to the surface of the H-section steel in advance or bonding a water-absorbing resin to the surface of the H-section steel have been used. Various methods have been proposed, such as a method of adhering with a lubricant, or ii) a method of attaching a lubricant to the surface of an H-section steel, and further iii) a method of coating the H-section steel with a coating material. I have.

As the method i), for example, Japanese Patent Publication No. 62-18597 proposes to use a wax having a specific composition. Further, for example, Japanese Patent Application Laid-Open No.
Japanese Patent No. 8715 discloses that a surface treatment agent for extracting a core material (temporary buried material) made of a spreading agent such as a polyester resin, a vinyl resin, an acrylic resin, or a urethane resin and a water-absorbing resin is used. Proposed. Also, for example, Japanese Patent Application Laid-Open No. 63-165615 discloses that when a steel material is pulled out using a water-swellable film made of a volatile film-forming resin such as natural rubber, synthetic rubber, or plastic, and a water-absorbing resin. Methods for reducing frictional resistance have been proposed.

As the method ii), for example, Japanese Patent Application Laid-Open No. 6-185054 proposes that a sheet-like lubricant made of superabsorbent fibers be adhered to the surface of a steel material. Further, for example, Japanese Patent Application Laid-Open No. Sho 62-174418
Japanese Patent Laid-Open Publication No. HEI 9-214605 proposes a method of reducing a frictional resistance when a steel material is pulled out using a lubricating tape composed of a water-absorbent resin and a binder requiring water.

As the method iii), for example, Japanese Patent Application Laid-Open No. 7-247549 discloses a bag-shaped polymer sheet in which a water-absorbent resin is directly fixed to a base material such as a woven or nonwoven fabric. A method of reducing the frictional resistance when the temporary buried object is pulled out by coating the temporary buried object with the above lubricant has been proposed.

[0008]

However, in a method in which a lubricant is directly applied to the surface of a core material (temporary buried material) such as an H-section steel or the like, the core material (temporary buried material) is changed depending on the conditions at the site. ) Often cannot be extracted and collected, and the effect of reducing the frictional resistance (for example, the effect of preventing adhesion between soil cement and H-section steel) when the core material (temporary buried object) is extracted is insufficient, and excessive extraction Because of the need for force, there was also a problem with the safety when pulling out.

Also, the method of attaching a lubricant to the surface of the core material (temporary buried material) does not sufficiently reduce the frictional resistance at the time of pulling out. There is also a problem that the sticking operation itself on the surface cannot be re-attached and adjustment is difficult and extremely complicated. Furthermore, in order to obtain a conventional lubricating tape comprising a water-absorbing resin and a binder, a process of attaching a water-absorbing resin to a base material using a bonding agent that requires water is performed, but handling is complicated. Therefore, there is a problem that it takes time to remove water and productivity is reduced. In addition, the production and sheeting of the super-absorbent fiber requires a number of steps and is complicated.

Further, a method of covering a temporary buried material with a sheet-shaped lubricating material in which a water-absorbent resin is directly fixed to a base material is, for example, such that the sheet bag is not in close contact with the temporary buried material. For this reason, it was difficult to confirm the surface of the temporary buried object (the bag was swollen and the shape was not visible), and there were cases where the erection accuracy or workability was reduced. In addition, the bag may be damaged at the time of installation into the excavation hole, and the pullability of the temporary buried object may be reduced.

Therefore, the workability, safety, and recyclability of the core material (temporary buried material) are good, and the adhesion prevention can facilitate the operation of pulling out the core material (temporary buried material) such as H-section steel. There is a need for an anti-adhesion material configured to suppress adhesion or friction between the two, so that the core material (temporary buried material) can be more easily pulled out of the cured product of the hydraulic composition. The present invention has been made in view of the above-mentioned conventional problems, and has as its object to improve the safety and recyclability of the core material (temporary buried material), and to perform the work of pulling out with the high anti-adhesion effect of the anti-adhesion material. It is to provide an anti-adhesion material which can be improved.

[0012]

Means for Solving the Problems The present inventors diligently studied an anti-adhesion material in order to solve the above-mentioned conventional problems. As a result, it is a material that prevents adhesion between objects or between a hydraulic composition such as cement and a support (temporary buried material) such as an H-section steel, and at least a water absorbing agent such as a water absorbent resin and wax. A hydrophobic lubricant, a composition or an anti-adhesion material is interposed between the objects or between the support and the cured product of the hydraulic composition, so that the inter-object or the hydraulic composition and the support Adhesion and friction with the body are suppressed, for example, the support (temporary buried material) is easily pulled out or separated and removed from the hydraulic composition, and the water absorbing agent of the present invention is mixed with a hydrophobic lubricant. Finding to stop the movement of fluids such as water by filling the voids of the object with the composition,
The present invention has been completed.

[0013] Further, an anti-adhesion material having at least a water-absorbing lubricating layer containing a water-absorbing agent and a hydrophobic lubricating layer containing a hydrophobic lubricant is provided between the surface of the H-section steel and the cured product of the hydraulic composition. Intervening to suppress adhesion and friction between the hydraulic composition and the support (temporary buried material), and facilitate the removal or separation and removal of the support (temporary buried material) from the hydraulic composition. And completed the present invention.

The composition is a composition containing at least a water absorbing agent and a hydrophobic lubricant, and the weight composition ratio of the water absorbing agent to the hydrophobic lubricant is in the range of 1: 100 to 100: 1.

According to the above arrangement, there exists between the objects,
The water-absorbing agent and / or hydrophobic lubricant that has absorbed water exhibits adhesion prevention between objects, lubricity, and water blocking (leakage prevention). Due to the synergistic effect of the water absorbing agent and the hydrophobic lubricant, higher adhesion between objects can be prevented.

Further, a more preferred composition comprises a water-absorbing agent,
It is a water absorbent resin.

According to the above configuration, a gel having excellent flexibility and lubricity is formed by the water-absorbing swelling property of the water-absorbent resin. Achieves adhesion prevention and waterproofing of voids.

In a further preferred composition, the hydrophobic lubricant is a semi-solid lubricant.

The term "semi-solid" means that the penetration (JIS K-2560) defined in the JIS standard is in the range of 3 to 385.

The semi-solid lubricant preferably has a mixing consistency of 3 to 385, more preferably 5 to 385.
To 250, more preferably 10 to 170. If the penetration is less than 3, the lubricity is reduced, the adhesion to the steel material is also reduced, and the material tends to fall off. Further, there is a problem that the melting takes a long time and the melt coating becomes complicated. Further, when the penetration exceeds 385, there is a problem that liquid dripping occurs and the surroundings are contaminated and the adhesive strength is reduced.

According to the above configuration, the adhesion between objects is more reliably prevented by the high lubricating performance of the semi-solid pressure-sensitive adhesive.
In addition, due to the high tackiness of the semi-solid pressure-sensitive adhesive, the work of applying (adhering) to the surface of an object or a sheet-like base material by applying or pasting the same is facilitated, and the handling property and productivity are improved. Furthermore, mixing with the water absorbing agent is easy, and the water absorbing agent can be uniformly dispersed and mixed with the hydrophobic lubricant without sedimentation of the water absorbing agent.

Lubricants are classified into three main types at room temperature, from 10 ° C. to 30 ° C., as liquid lubricants, semi-solid lubricants, and solid lubricants. Problems such as liquid dripping or falling off may occur during the attachment (adhesion) work such as application or attachment to the sheet-like substrate surface. On the other hand, semi-solid lubricants that are semi-solid at room temperature, such as waxes and greases prepared into semi-solid state by blending mineral oil, have lubricating properties as well as adhesive strength (adhesion to steel and sheet-like base materials). )
Facilitates application and sticking, such as solventless application, to objects and sheet-like substrates, and improves handling and productivity. In particular, a wax-based semi-solid lubricant is particularly preferred, and can be melt-coated and further improves workability. (The grease is easily degraded by heating and has low thermal stability.) The first anti-adhesion material of the present invention is a material for preventing the adhesion between the hydraulic composition and the support in order to solve the above problems. And at least,
It is characterized by including a mixture containing a water absorbing agent and a hydrophobic lubricant.

According to the above configuration, the adhesion between the support and the hydraulic composition is prevented by interposing the anti-adhesive between the support and the hydraulic composition.

For example, it is possible to prevent the adhesion between the H-shaped steel as a support and the cured soil cement as a hydraulic composition,
Facilitates withdrawal and recovery of H-section steel.

In order to solve the above-mentioned problems, a more preferable first anti-adhesion material of the present invention is to adhere at least a mixture containing a water absorbing agent and a hydrophobic lubricant to the surface of a support. Features.

According to the above configuration, the adhesion between the support and the hydraulic composition is prevented by directly applying the anti-adhesion material to the surface of the support by coating or the like. Further, for example, an H-shaped steel coated with an anti-adhesion material by coating can be easily inserted (buried) into a hole having a small hole diameter because the outline of the H-shaped steel can be clarified.

In a preferred method of removing a support using the first anti-adhesion material according to the present invention, at least a part of the surface of the support such as an H-section steel is made of a water absorbing agent in order to solve the above problems. A step of applying an anti-adhesion material containing a mixture with a hydrophobic lubricant, a step of contacting the support with a hydraulic composition, a step of curing the hydraulic composition, and a step of removing the support It is characterized by:

According to the above arrangement, the adhesion between the support and the hydraulic composition is reliably prevented.

The second anti-adhesion material of the present invention is characterized in that the first anti-adhesion material further includes a sheet-like substrate in order to solve the above-mentioned problems.

According to the above configuration, the adhesion between the support and the hydraulic composition is prevented by interposing the anti-adhesion material between the support and the hydraulic composition.

For example, it is possible to prevent the adhesion between the H-shaped steel as the support and the cured soil cement as the hydraulic composition,
Facilitates withdrawal and recovery of H-section steel.

In order to solve the above-mentioned problems, a more preferred second anti-adhesion material of the present invention has a sheet-like base material layer disposed on the hydraulic composition layer side and a water-absorbing material on the support surface side. A mixture layer containing an agent and a hydrophobic lubricant is provided.

According to the above configuration, the coating workability described below is improved and the adhesion between the support and the hydraulic composition is more reliably prevented.

A sheet-like base material layer of the anti-adhesive material is provided on the hydraulic composition side, and a mixture layer of a water-absorbing resin and a hydrophobic lubricant is provided on the surface side of a support such as an H-section steel. It is particularly preferable because the adhesion preventing material can be adhered (sticked) to the surface of the support by utilizing the adhesion force of the mixture. For example, the advantages of adhering a sheet-like anti-adhesive material to a support such as an H-section steel are as follows:
That the workability is improved, the contour of the coated support (for example, H-section steel) is clear and the erection accuracy is improved,
For example, even if the anti-adhesion material breaks during construction, the anti-adhesion material does not easily separate from the surface of the support and can maintain a high anti-adhesion property.

Further, in order to solve the above-mentioned problem, a preferable method of removing a support using the second anti-adhesion material of the present invention is to provide at least a part of a support such as an H-section steel with a water absorbing agent and a hydrophobic agent. Coating with an anti-adhesive material containing a mixture with a water-soluble lubricant and a sheet-like substrate, contacting the support with a hydraulic composition, curing the hydraulic composition, and removing the support Are sequentially included.

According to the above arrangement, the adhesion between the support and the hydraulic composition can be more reliably prevented.

In order to solve the above-mentioned problems, the third anti-adhesion material of the present invention is a material for preventing the adhesion between the hydraulic composition and the support, and at least a water-absorbing lubricant containing a water-absorbing agent. And a hydrophobic lubricating layer containing a hydrophobic lubricant.

According to the above-described structure, a water-absorbing lubricating layer which exhibits an anti-adhesion property and a lubricating property between the hydraulic composition (cured product) and the support (both) by absorbing water; Due to the synergistic effect with the hydrophobic lubricating layer containing the hydrophobic lubricant having the anti-adhesive performance and the lubricating performance, it is possible to further prevent the adhesion between the two. For example, it is possible to easily realize the extraction and recovery of the H-shaped steel from the cured soil cement. Also, the coating operation is improved, and the H-shaped steel coated in the soil cement can be easily supplied.

In order to solve the above-mentioned problems, a more preferable third adhesion preventing material of the present invention is characterized in that the water absorbing agent is a water absorbing resin.

According to the above construction, the water-absorbing lubricating layer forms a gel layer which is flexible and excellent in lubricity due to the water-absorbing swelling property of the water-absorbing resin. Due to the separation performance of both the (cured product) and the support,
A higher degree of prevention of adhesion between the two is realized.

In order to solve the above-mentioned problems, the fourth anti-adhesion material of the present invention is the third anti-adhesion material of the present invention, wherein the water-absorbing lubricating layer is a lubricating layer containing at least an alkali water-soluble resin. There is a feature.

The water-absorbing lubricating layer preferably has a water-absorbing resin adhered to the substrate from the viewpoint of processing and economy. However, when a hydrophobic bonding agent is used as a bonding agent, the water-absorbing swellability of the water-absorbing resin is impaired. In some cases, when a water-soluble bonding agent is used, the water-absorbing resin easily falls off when wet with rain or when it comes into contact with a liquid hydraulic composition before curing, and any of the expected Performance may not be exhibited. On the other hand, the alkaline water-soluble resin is not easily solubilized even when it comes into contact with water such as rain, for example, before use, such as before installation, and has a unique high adhesive strength, so that the water-absorbent resin falls off. Can be prevented. On the other hand, alkaline water-soluble resin is
Since it is solubilized in a hydraulic composition such as cement water exhibiting alkalinity, it has the feature that it does not inhibit water absorption swelling of the water-absorbent resin (for example, does not cause swelling regulation) at the time of use during installation. I have.

According to the above configuration, the use of the water-absorbing lubricating layer containing the alkali water-soluble resin achieves a higher degree of prevention of adhesion between the hydraulic composition (cured product) and the support.

According to a fifth aspect of the present invention, there is provided a fifth anti-adhesion material according to the third aspect of the present invention.
The water-absorbing lubricating layer has a coating Gurley hardness of at least 10
It is characterized in that it is a lubricating layer containing a resin of not more than 00 (mgf) {N}.

According to the above construction, since the water absorbing agent is adhered by a soft resin having a coating Gurley hardness of 1000 (mgf) {N} or less, the water absorbing agent of the water absorbing lubricating layer swells when absorbing water. (Gelling) The regulation is small, and the prevention of adhesion between the hydraulic composition (cured product) and the support can be easily realized.

According to a sixth aspect of the present invention, in order to solve the above-mentioned problems, in the first to fifth anti-adhesion materials of the present invention, the hydrophobic lubricant is a semi-solid lubricant. It is characterized by.

According to the above configuration, the following coating workability is improved, and furthermore, the more reliable prevention of adhesion between the two is realized. In addition, the compounding of the hydrophobic lubricating layer is facilitated.

The hydrophobic lubricating layer side of the anti-adhesion material of the present invention is H
It is particularly preferable to dispose the anti-adhesion material on the surface of the support by utilizing the adhesion force by disposing it on the surface side of the support such as a shaped steel. For example, the advantage of adhering a sheet-shaped anti-adhesive to a support such as H-section steel is that the re-peelable adhesion characteristic of a semi-solid lubricant makes it possible to freely adjust re-attachment, making it extremely easy to apply. Can be In the construction of the retaining wall, the surface (contour) of the H-shaped steel can be clearly checked by bringing the anti-adhesion material into close contact with the H-shaped steel (support), so that the installation accuracy can be increased and the workability can be improved. . In the construction of the retaining wall, the anti-adhesion material of the present invention can make the anti-adhesion material adhere to the surface of the H-section steel by the adhesion effect (adhesion effect) of the semi-solid lubricant. Even if it is damaged, the adhesion preventing material does not separate from the H-shaped steel surface, and the inflow (contact) of cement milk to the H-shaped steel surface can be minimized. Therefore,
Easy to collect and recover H-section steel. And the like. This advantage will be described in detail below. Due to the removable adhesion characteristic of the semi-solid lubricant, the re-sticking can be freely adjusted and the sticking operation can be made extremely easy. This method is simpler than the conventional method of applying a lubricant such as wax to a support or a method of attaching a tape-shaped lubricant. In the construction of the retaining wall, the conventional Japanese Patent Laid-Open No. 7-247 is used.
No. 549, in which a temporary buried material such as an H-shaped steel as a support is coated with a coating material of an anti-adhesive material in a non-adhered state.
Since the surface of the H-section and the contour of the H-section can be clearly checked by bringing the anti-adhesion material into close contact with the H-section (support), the accuracy of setting (injection of the H-section into the excavation hole) is improved. Can improve workability. In the construction of the retaining wall, in the conventional method of coating the covering material in a non-adhered state, for example, when the diameter of the drilling hole is small, such as after the covering material contacts the wall surface of the drilling hole and cut with a knife at the time of building. In some cases, severe damage occurred over several meters. In this case, a large amount of cement milk
Since the anti-adhesion material flows into (contacts) the surface of the shaped steel and separates from the surface of the H-shaped steel, the adhesion strength between the cured product of the hydraulic composition and the H-shaped steel (support) increases. In some cases, it was difficult to pull out the H-section steel. However, the anti-adhesion material of the present invention can make the anti-adhesion material adhere to the surface of the H-section steel by the adhesion effect (adhesion effect) of the semi-solid lubricant. In addition, the anti-adhesion material does not separate from the surface of the H-shaped steel, and the inflow (contact) of cement milk to the surface of the H-shaped steel can be minimized. By adhering the anti-adhesion material to the H-section steel (support), the adhesion strength of both the hydraulic composition and the H-section steel can be remarkably suppressed even under severe conditions where the H-section steel is easily broken. Easy to withdraw and recover steel.

Also, semi-solid lubricants which are semi-solid at room temperature, such as waxes and greases prepared by mixing mineral oil into semi-solids, have not only lubricating properties but also adhesive strength (adhesion to steel). Solvent-free application to the water-absorbing lubricating layer is possible and compounding is facilitated. In particular, a wax-based semi-solid lubricant is particularly preferred, and can be melt-coated and further improves workability. (The grease is easily degraded by heating and has low thermal stability.) The above-mentioned semi-solid lubricant preferably has a good penetration consistency.
It is 3 to 385, more preferably 5 to 250, even more preferably 10 to 170. If the penetration is less than 3, the lubricity is reduced, the adhesion to the steel material is also reduced, and the material tends to fall off. Further, there is a problem that the melting takes a long time and the melt coating becomes complicated. Also,
If the penetration exceeds 385, liquid dripping will occur, contaminating the surroundings and causing a problem of reduced adhesive strength.

In order to solve the above-mentioned problems, a more preferable third to sixth anti-adhesion materials of the present invention have a water-absorbing lubricating layer disposed on the hydraulic composition layer side and a support surface side. In which a hydrophobic lubricating layer is disposed.

According to the above construction, the water-absorbing lubricating layer can easily exhibit water-absorbing swelling, and the adhesion of the hydrophobic lubricating layer allows the anti-adhesion material to easily adhere to the surface of the support (adhesion). As a result, the above-described effects can be exhibited, and the adhesion between the hydraulic composition (cured product) and the support can be further prevented.

In order to solve the above problems, the seventh anti-adhesion material of the present invention comprises at least a sheet-like base material, a water-absorbing agent, and a resin having a coating Gurley hardness of 1000 (mgf) {N} or less. And is characterized by including.

According to the above arrangement, the adhesion between the hydraulic composition (cured product) and the support can be easily prevented.

The eighth anti-adhesion material of the present invention is characterized in that in the first to seventh anti-adhesion materials of the present invention, the water absorbing agent is a water-absorbing resin. I do.

According to the above configuration, the mixture or the water-absorbing lubricating layer containing the water-absorbing resin and the hydrophobic lubricant forms a gel layer having excellent flexibility and lubricity due to the water-absorbing swelling property of the water-absorbing resin component. However, due to the excellent lubricating performance and the separating performance of the hydraulic composition (cured product) and the support of the gel layer,
The adhesion between the hydraulic composition (cured product) and the support is easily prevented.

A first use of the anti-adhesion material of the present invention is to use the anti-adhesion material of the present invention to prevent adhesion between a temporarily embedded material for a retaining wall and a hardened cement composition.

The adhesion between the temporary buried material for the retaining wall and the cured product of the cement composition is more completely prevented by the adhesion preventing performance of the above-mentioned adhesion preventing material.

A second application of the anti-adhesion material of the present invention is to use the anti-adhesion material of the present invention for preventing adhesion between a temporarily buried object and fluidized soil.

The adhesion between the temporary buried material and the fluidized soil is more completely prevented by the adhesion preventing performance of the above-mentioned adhesion preventing material.

A third use of the composition of the present invention is to use the composition of the present invention and an anti-adhesion material for stopping water and preventing water leakage.

In particular, the anti-adhesion material containing the mixture of the present invention has a volume expansion property due to water absorption due to the properties of the water-absorbing resin, and has hydrophobicity or water repellency depending on the properties of the hydrophobic lubricant. Waterproofing and water leakage prevention at gaps or cracks in sheet pile joints, ground, bedrock, concrete, etc. are reliably realized. In addition, since the anti-adhesion material containing the mixture of the water-absorbing agent and the hydrophobic lubricant of the present invention can be made into a solventless and extremely low-viscosity (shaffy) liquid by heating, the working environment is safe and the injection is possible. Excellent workability and workability because the work is easy. In addition, it can be injected into any small gap.

[0062] In order to solve the above-mentioned problems, the support removing method of the present invention comprises a step of coating at least a part of a support such as an H-section steel with the anti-adhesive material of the present invention. The method is characterized in that it includes a step of bringing into contact with the hard composition, a step of curing the hydraulic composition, and a step of removing the support.

The above-mentioned coating step covers at least a part of a support such as an H-section steel with the anti-adhesion material of the present invention. Preferably, most of the surface in contact with the hydraulic composition is coated. This is a step of coating, for example, a ratio of 50 area% or more, preferably 70 area% or more, more preferably 90 area% or more, and particularly preferably 95 area%.

According to the above-described structure, a water-absorbing agent and a hydrophobic lubricant exhibiting an anti-adhesive property and a lubricating property between the hydraulic composition (cured product) and the support (both) by absorbing water. And a water-absorbing agent component or a water-absorbing lubricating layer containing a mixture, having an anti-adhesion property and a lubricating performance of both, a hydrophobic lubricant component or a hydrophobic lubricating layer of a mixture containing a water-absorbing agent and a hydrophobic lubricant. Due to the synergistic effect of the above, the support can be easily removed.

[0065]

BEST MODE FOR CARRYING OUT THE INVENTION The first feature of the present invention is that a mixture containing a water absorbing agent and a hydrophobic lubricant in which a water absorbing agent and a hydrophobic lubricant are mixed at a specific mixing ratio is used. There. Thereby, the anti-adhesion material containing the mixture of the present invention has an unprecedented anti-adhesion property, lubricity, water stopping property,
It is a material that has achieved simultaneous progress in many aspects such as workability, safety, recyclability of support, and economy.

The anti-adhesion material containing the mixture of the present invention is a material for preventing adhesion between objects or between a hydraulic composition such as cement and a support (temporary buried material) such as H-section steel, At least, an anti-adhesion material containing a mixture of a water-absorbing agent such as a water-absorbing resin and a hydrophobic lubricant such as wax, by interposing between the objects or between the support and the cured body of the hydraulic composition, The present invention is intended to suppress the adhesion and friction between the objects or between the hydraulic composition and the support, to facilitate, for example, to pull out or separate and remove the support (temporary buried object) from the hydraulic composition. The movement of a fluid such as water is stopped by filling the mixture into the voids of the object.

The weight composition ratio (mixing ratio) of the mixture containing at least the water-absorbing agent and the hydrophobic lubricant constituting the anti-adhesion material containing the mixture of the present invention is in the range of 1: 100 to 100: 1. . When mixing a hydrophobic lubricant and a hydrophilic water-absorbing agent, the water-absorbing properties of the water-absorbing agent are impaired by the hydrophobic properties of the hydrophobic lubricant, so the idea of mixing the two does not usually come up. Surprisingly, when the water-absorbing agent is 1 part by weight or more with respect to 100 parts by weight of the hydrophobic lubricant, the water-absorbing agent can absorb moisture, prevent adhesion between objects, lubricity (friction reducing property), Water-stopping property is greatly improved, and a hydrophobic lubricant is added to 100 parts by weight of a water-absorbing agent.
It has been found that if the amount is at least part by weight, the water-absorbing agent can be attached to the object surface. In addition, from the viewpoints of anti-adhesion properties between objects, lubricity (friction reducing properties), water stopping properties, handling properties, and workability, the mixture containing the above-described water-absorbing agent and a hydrophobic lubricant has a water-absorbing agent and a hydrophobic lubricant. Has a weight composition ratio (mixing ratio) of 1:
The range of 10 to 10: 1 is more preferable, and 1: 5 to 5: 1.
Is more preferable, and the range of 1: 2 to 2: 1 is particularly preferable.

The water-absorbing agent according to the present invention is prepared by adding 1
It is a material that has a water absorption after being immersed in a net after being immersed for a period of time and then air-dried at 20 ° C. for 1 minute to be twice or more its own weight. For example, a water-absorbent resin, a water-absorbent resin sheet, water-absorbent fiber, pulp (fiber), cotton, rayon (fiber), paper and the like can be mentioned.

In the anti-adhesion material containing the mixture of the present invention, a water absorbing resin is most preferable as the water absorbing agent to be mixed with the hydrophobic lubricant.

The above-mentioned water-absorbing resin is not particularly limited as long as it is a resin which swells by absorbing water and has a water absorption ratio of deionized water with respect to its own weight of 3 times or more. A resin having a water absorption ratio of 10 times or more is more preferable. Specific examples of the water-absorbent resin include, for example, a cross-linked poly (meth) acrylic acid, a cross-linked poly (meth) acrylate, a cross-linked poly (meth) acrylate having a sulfonic acid group, polyoxy Cross-linked poly (meth) acrylate ester having alkylene group, cross-linked poly (meth) acrylamide, (meth) acrylate and (meth) acrylate
Cross-linked copolymer with acrylamide, cross-linked copolymer of hydroxyalkyl (meth) acrylate and (meth) acrylate, cross-linked polydioxolane, cross-linked polyethylene oxide, cross-linked polyvinyl pyrrolidone, cross-linked sulfonated polystyrene, cross-linked polyvinyl Pyridine, saponified starch-poly (meth) acrylonitrile graft copolymer, starch-poly (meth) acrylic acid (salt) graft crosslinked copolymer, reaction product of polyvinyl alcohol and maleic anhydride (salt), crosslinked Examples thereof include a polyvinyl alcohol sulfonate, a polyvinyl alcohol-acrylic acid graft copolymer, and a cross-linked polymer of polyisobutylene maleic acid (salt). One of these water-absorbing resins may be used alone, or two or more of them may be used in combination. Further, other resins can be used in combination with the water-absorbing resin to such an extent that various properties (water absorption ratio and the like) of the water-absorbing resin are not impaired.

Of the above-mentioned water-absorbing resins, those having a nonionic group and / or a sulfonic acid (salt) group are more preferable, and those having an amide group or a hydroxyalkyl group are more preferable. Examples of the water-absorbing resin include a crosslinked copolymer of (meth) acrylate and (meth) acrylamide, and a crosslinked copolymer of hydroxyalkyl (meth) acrylate and (meth) acrylate. Can be Further, among the water-absorbing resins exemplified above, a water-swellable resin having a polyoxyalkylene group is particularly preferable. Examples of the water-absorbing resin include a cross-linked copolymer of a (meth) acrylate having a methoxypolyoxyalkylene group and a (meth) acrylate. The water-swellable resin having a methoxypolyoxyalkylene group is particularly excellent in swellability of, for example, cement water in alkaline water for a long period of time. Therefore, by using the water-absorbing resin, the operation of pulling out the support can be performed extremely easily.

Further, as the water absorbing resin according to the present invention, a resin obtained by polymerizing a monomer component containing a water-soluble ethylenically unsaturated monomer and, if necessary, a crosslinking agent is used. be able to. A water-absorbent resin obtained by (co) polymerizing an ethylenically unsaturated monomer is more excellent in swelling property with respect to water, and is generally inexpensive. Therefore, by using the water-absorbing resin, the work of pulling out the support (temporary buried material) can be performed extremely easily and more economically. In addition, the above-mentioned crosslinking agent is not particularly limited. In addition, by adding a crosslinking agent to a linear polymer and crosslinking, or
It is also preferable to form a water-absorbent resin by irradiating an electron beam to crosslink.

The above ethylenically unsaturated monomers include:
Specifically, for example, acrylic acid, methacrylic acid, itaconic acid, maleic acid, fumaric acid, crotonic acid, citraconic acid, vinylsulfonic acid, (meth) allylsulfonic acid,
2- (meth) acrylamide-2-methylpropanesulfonic acid, 2- (meth) acryloylethanesulfonic acid,
2- (meth) acryloylpropanesulfonic acid, and alkali metal salts and ammonium salts of these monomers;
N, N-dimethylaminoethyl (meth) acrylate,
And quaternary compounds thereof; (meth) acrylamide, N,
(Meth) acrylamides such as N-dimethyl (meth) acrylamide, 2-hydroxyethyl (meth) acrylamide, diacetone (meth) acrylamide, N-isopropyl (meth) acrylamide, (meth) acryloylmorpholine, and monomers thereof A hydroxyalkyl (meth) acrylate such as 2-hydroxyethyl (meth) acrylate and 2-hydroxypropyl (meth) acrylate; polyethylene glycol mono (meth) acrylate, polypropylene glycol mono (meth) acrylate, methoxypolyethylene glycol mono ( Polyalkylene glycol mono (meth) acrylates such as meth) acrylate and methoxy polypropylene glycol mono (meth) acrylate; N-vinyl-
N-vinyl monomers such as 2-pyrrolidone and N-vinylsuccinimide; N-vinylformamide, N-vinyl-N
-Methylformamide, N-vinylacetamide, N-
N-vinylamide monomers such as vinyl-N-methylacetamide; vinyl methyl ether; and the like, but are not particularly limited. These ethylenically unsaturated monomers may be used alone or in combination of two or more.

Among the ethylenically unsaturated monomers exemplified above, an ethylenically unsaturated monomer having a nonionic group and / or a sulfonic acid (salt) group is more preferable. Examples of the monomer include 2- (meth) acrylamide-2
-Methylpropanesulfonic acid, 2- (meth) acryloylethanesulfonic acid, 2- (meth) acryloylpropanesulfonic acid, (meth) acrylamide, hydroxyalkyl (meth) acrylate, methoxypolyethylene glycol mono (meth) acrylate and the like. . Further, an ethylenically unsaturated monomer having a polyoxyalkylene group is particularly preferred. A water-absorbent resin obtained by polymerizing a monomer component containing methoxypolyethylene glycol mono (meth) acrylate is particularly excellent in swellability in alkaline water. Therefore, by using the water-absorbing resin, for example, the operation of pulling out the support (temporary buried object) can be performed extremely easily.

Further, when two or more ethylenically unsaturated monomers are used in combination as the monomer component, ethylene having a nonionic group and / or a sulfonic acid (salt) group occupies the monomer component. The ratio of the unsaturated monomer is 1
%, More preferably at least 10% by weight. When the above ratio is less than 1% by weight, the workability of pulling out the support (temporary buried material) is further improved even when a water-absorbent resin obtained by polymerizing the monomer component is used. May not be possible.

When two or more ethylenically unsaturated monomers are used in combination as a monomer component, a more preferable combination is, for example, a combination of an alkali metal (meth) acrylate such as sodium acrylate and acrylamide. And a combination of an alkali metal salt of (meth) acrylic acid and methoxypolyethylene glycol mono (meth) acrylate, but are not particularly limited.

By polymerizing the above monomer components,
Although a water-absorbent resin is obtained, the method for polymerizing the monomer component, that is, the method for producing the water-absorbent resin is not particularly limited.

The average molecular weight, shape, average particle size and the like of the water-absorbent resin are determined according to the composition of the hydraulic composition and the pH of alkaline water.
H, the working environment, the combination with the substrate (sheet shape) when combined with another substrate, and the like, may be set, and are not particularly limited, but the average particle diameter is 2,000 μm.
It is more desirable to use a water-absorbing resin having a thickness of 500 μm or less, more preferably 200 μm or less, and particularly preferably 100 μm or less. More particularly preferred average particle size is 70 μm or less. By using the water-absorbent resin having the average particle size, the dispersibility or the mixing property of the water-absorbent resin in mixing with the hydrophobic lubricant is improved, and the anti-adhesion property and handleability of the mixture are further improved. Further, for example, when the mixture is formed on the surface of the sheet-like substrate, the layer of the mixture can be easily formed. In addition, it is easy to increase the amount of the water-absorbing resin contained in the mixture layer per unit area in a uniform state, and the anti-adhesion performance can be further improved. Furthermore, the hydrophobic lubricant according to the present invention, which can also prevent the water-absorbent resin from falling off during water absorption and swelling and prevent a decrease in anti-adhesive properties, is particularly limited as long as it is hardly soluble in water and has lubricating performance. Is not to be done. For example, a material that exerts a lubricating effect when the support (temporary embedding material) is pulled out or separated from the cured product of the hydraulic composition.

Specific examples of the hydrophobic lubricant include wax, grease, tar, asphalt, fats and oils, and the like.

The wax is chemically defined as an ester of a water-insoluble monohydric or dihydric higher alcohol and a fatty acid. Specifically, for example, waxes such as wood wax and cotton wax are used. Wax; animal waxes such as sperm whale oil, beeswax, wool wax; various waxes in liquid or semi-solid or solid such as bees oil, montan wax, ozokerite, petroleum wax, paraffin wax, microcrystalline wax, petrolatum; Although it is mentioned, it is not particularly limited. Of the above exemplified waxes, semi-solid waxes have lubricity,
Coating workability, adhesion (adhesion) between support and anti-adhesion material
From the viewpoint of, it is preferable because it is more excellent. Furthermore, semi-solid petroleum waxes are particularly preferred.

The semi-solid wax is obtained by blending mineral oil. The weight blending ratio of wax to mineral oil is in the range of wax: mineral oil = 30: 70 to 70:30, that is, when the wax is 30 wt. % And less than 70% by weight are particularly preferred from the viewpoints of lubricity, coating processability, and adhesion (adhesion) between the support and the adhesion preventing material. If the weight% of the wax is 30% by weight or less, the viscosity may decrease at room temperature around 30 ° C., approaching a liquid state (fluidization), weakening the adhesion, or causing a problem of liquid dripping during coating processing. On the other hand, if the content is 70% by weight or more, in a low-temperature environment of 5 ° C. or less, the composition may become hard and may hinder the coating of the anti-adhesive material on the support, or may deteriorate the adhesion.

In addition to the mineral oil, various additives such as polybutadiene and polyethylene may be added to the wax. For example, the wax may be added in an amount of 1 to 20% by weight based on the total weight of the wax and the mineral oil. By the addition, properties such as improvement in adhesion can be improved.

Grease is a semi-solid lubricant obtained by mixing a fatty acid metal salt with mineral oil. Specifically, for example, base oils such as mineral oil, silicone oil (silicone grease), and diester oils And a mixture obtained by mixing a thickener such as a metal soap made of a fatty acid salt such as a fatty acid calcium salt, a fatty acid sodium salt or a fatty acid lithium salt, a bentonite type, a silica gel type, a copper phthalocyanine type or an allyl urea type. The grease is not particularly limited, but has a hardness that does not fluidize at room temperature around 30 ° C. and does not hinder the coating of the anti-adhesive material on the support even in a low temperature environment of 5 ° C. or less. (Softness) is preferred.

Examples of the tar include wood tar, coal tar and the like. Tar is not particularly limited, but does not fluidize at room temperature around 30 ° C., and even in a low temperature environment of 5 ° C. or less,
Those having a hardness (softness) in a range that does not hinder the coating of the support with the adhesion preventing material are preferable.

Examples of the fats and oils include fatty acids such as oleic acid, lauric acid and stearic acid; derivatives such as synthetic glycerin and polyglycerin; higher alcohols such as branched higher alcohols; Linseed oil, rapeseed oil, castor oil, beef oil, lanolin, margarine, heavy oil; and the like. Oils and fats are not particularly limited, but do not fluidize at room temperature around 30 ° C. and hinder coating of the anti-adhesive material on the support even in a low temperature environment of 5 ° C. or less. Those having a range of hardness (softness) are preferred.

These lubricants may be used alone, or two or more of them may be used in combination. Among the lubricants exemplified above, semi-solid waxes and greases are more preferable because they are more excellent in lubricating effect and have a low content of volatile components. Further, a semi-solid wax is particularly preferable because it can be melt-coated and has excellent durability (stability over time).

The semi-solid state has a penetration consistency of 3 to 3
In the state of 85, preferred hydrophobic lubricants have a hydrophobic half-strength in the range of 3 to 385, more preferably in the range of 5 to 250, and still more preferably in the range of 10 to 170. It is a solid lubricant. If the penetration is less than 3, the lubricity is reduced, for example, the adhesive strength to steel material is also reduced, and the material tends to fall off. Further, there is a problem that the melting takes a long time and the melt coating becomes complicated. Further, when the penetration exceeds 385, there is a problem that liquid dripping occurs and the surroundings are contaminated and the adhesive strength is reduced. still,
The penetration is determined by the test method of JIS K2560.

The hydrophobic lubricant may be added, if necessary, to such an extent that the lubricity of the lubricant is not impaired. For example, various additives such as surfactants, pulp fibers, rust inhibitors and antioxidants may be added. It may contain an agent.

The anti-adhesion material containing the mixture according to the present invention can easily prevent adhesion between objects and water stoppage.
Above all, adhesion between a hydraulic composition such as a cement composition (concrete) and a support such as an H-section steel is prevented, and separation and removal of the cured product of the hydraulic composition and the support are extremely easily realized. .

The hydraulic composition according to the present invention includes, for example, fluidized soil mixed with cement components used for cement, various concretes, various mortars, cement milk, soil cement, backfill soil, water glass, etc. Examples include, but are not particularly limited to, hydraulic construction generally used when constructing a ground foundation structure such as a retaining wall or a foundation in the field of construction and civil engineering in general. Can be The hydraulic composition is cured (hydrated) to be a cured product. The hydraulic composition according to the present invention includes a fluidized state before curing,
It refers to both those in a hard state exhibiting compressive strength after curing. Incidentally, cement contained in the hydraulic composition,
The type and combination of water, admixture, admixture, aggregate, reinforcing material, and the like, that is, the composition of the hydraulic composition is not particularly limited, but the compression strength of the cured product of the hydraulic composition is 9%. .8
N / cm ² (1 kgf / cm ² ) or more, preferably 49 N
/ Cm ² (5 kgf / cm ² ) or more, more preferably 98
^{1N / cm 2 (10kgf / cm} 2) or more, particularly preferably ^{294N / cm 2 (30kgf / cm} 2) or more,
The greater the compressive strength, the greater the difference in the effect of the anti-adhesion material of the present invention compared to that of the conventional anti-adhesion material.

As the support according to the present invention, for example,
Specifically, for example, H-shaped steel, I-shaped steel, iron columns, concrete piles, poles, tubular piles (hollow piles), steel sheet piles (sheet piles) which are long plate-shaped piles, corrugated sheets, formwork , A reinforcing bar, a plug for treating a pile head, and the like, but are not particularly limited as long as the hydraulic composition is supported and held from the outside and / or the inside (in a buried state). The support is
In general, it is often used when constructing ground foundation structures such as retaining walls and foundations in foundation work in the construction field and civil engineering field, and it is necessary to pull out or separate from the cured product of the hydraulic composition after use Things. The shape, length, material and the like of the support are not particularly limited.

Further, the shape of the support may be appropriately modified within a range that does not hinder achievement of the intended purpose of the construction in order to improve workability and the like. For example, when a tubular anti-adhesion material is hung from below to cover a suspended support (temporary buried object), which is an H-shaped steel, the corner of the tip of the lower flange of the H-shaped steel is caught. Although the anti-adhesion material may be damaged, the corner of the tip of the H-shaped steel was previously cut obliquely by melting and cutting (cutting).
The H-section steel is less likely to be caught, so that breakage can be prevented. Therefore, a shape in which a corner is obliquely dropped is preferable. Further, the H-shaped steel having the above-mentioned corners slanted can be easily pushed even when it is forced to be pushed high by an auger machine or the like at the time of building (injection into a drilling hole) and staying high. It is preferred. The support also includes a connection support in which a plurality of supports are connected. For example, two H-sections are longitudinally (longitudinal) using bolts and joint steel plates.
Connected H-section steel.

The hydraulic composition and the support were firmly adhered to each other when they contacted and cured, and it was difficult to pull out or separate and remove the support. However, by interposing the anti-adhesion material of the present invention between both the hydraulic composition and the support, at least an excellent anti-adhesion property, lubricity, and separation of a mixture containing a water-absorbing agent and a hydrophobic lubricant can be obtained. Due to the property, the adhesion between the two can be prevented, and the hydraulic composition and the support can be easily pulled out or separated and removed.

The method of interposing the anti-adhesion material containing the mixture of the water-absorbing agent and the hydrophobic lubricant of the present invention between the hydraulic composition and the support is not particularly limited, but is directly applied to the surface of the support in advance. It can be made to adhere by, for example.

The method of adhering the mixture containing the water-absorbing agent and the hydrophobic lubricant of the present invention to the surface of the support is not particularly limited, but specific examples thereof include, for example, a hydrophobic lubricant and a water-absorbing agent. A method in which an anti-adhesive material containing a mixture with a reactive resin is directly (solvent-free) applied to the surface of a support by brushing or using a roller; a method of spraying (spraying); At that time, it is preferable from the viewpoint of workability that the anti-adhesion material containing the mixture of the hydrophobic lubricant and the water-absorbent resin is heated and melted (having a melting point or higher). Further, a dispersion (resin solution) obtained by dispersing (or dissolving) an anti-adhesion material containing a mixture of a hydrophobic lubricant and a water-absorbing resin in a dispersion medium such as an organic solvent is sprayed on the support surface. A method of applying the resin dispersion with a brush or using a roller. Of the above examples,
Since a method of directly applying a mixture containing a hydrophobic lubricant and a water-absorbent resin (no solvent) to the surface of a sheet-like substrate by brushing or using a roller is easy in terms of work and production, More preferably, drying is unnecessary because it is a solventless system.

The method for mixing the hydrophobic lubricant and the water-absorbent resin is not particularly limited, and the hydrophobic lubricant and the water-absorbent resin can be directly mixed without a solvent, using a mixing rod, a stirrer, a high-speed General mixers such as a stirrer, kneader, and other blenders can be used. At this time, it is preferable from the viewpoint of workability that the mixing be performed under a temperature condition equal to or higher than the melting point of the hydrophobic lubricant. When a solvent is used, for example, methyl alcohol, ethyl alcohol, isopropyl alcohol, benzene, toluene, acetone, methyl ethyl ketone, ethyl acetate, butyl acetate; ethylene glycol, ethylene glycol monomethyl ether, ethylene glycol monomethyl ether acetate, polypropylene glycol monomethyl Organic solvents such as polyhydric alcohols and derivatives thereof, such as ether acetate, can be used, but are not particularly limited.

The thickness of the mixture layer containing the water absorbing agent and the hydrophobic lubricant is preferably in the range of 1 μm to 10,000 μm, more preferably in the range of 10 μm to 5,000 μm, and more preferably in the range of 100 μm to 2,000 μm. Particularly preferred is a range of 300 μm to 1,000 μm. If the film thickness is less than 10 μm, the separability and lubricity between the cured product of the hydraulic composition and the support are reduced, and the adhesion of the anti-adhesion material to the support is also undesirably reduced. On the other hand, if the thickness exceeds 10,000 μm, the workability is undesirably reduced.

The preferred method of removing the support using the first anti-adhesion material of the present invention is as follows.
An anti-adhesion material (mixture) containing at least a water-absorbing agent and a hydrophobic lubricant is applied, and the support is poured into a borehole into which a hydraulic composition of, for example, soil cement milk has been injected, and the support is placed in the hydraulic composition. Contact. Next, the hydraulic composition is cured, and after leaving it for a predetermined period, the support is pulled out and removed with a pulling machine. According to this method, the adhesion between the support and the hydraulic composition is reliably prevented.

A mixture containing a water-absorbing agent and a hydrophobic lubricant, which can be applied or poured in a solid, semi-solid, paste, liquid, or the like, can be used for coating (application) of uneven portions or narrow gaps, Effective for injection. The second anti-adhesion material of the present invention is of a form different from the first anti-adhesion material of the above-mentioned application type, and the above-mentioned on the front surface or the back surface of the sheet-like substrate,
A sheet-shaped anti-adhesion material obtained by applying a mixture containing a water-absorbing agent and a hydrophobic lubricant by coating or the like, and is more preferable for preventing adhesion from the viewpoints of handleability, workability, and reduction in total construction cost (economical efficiency). Material.

The surface on which the mixture containing the water-absorbing agent and the hydrophobic lubricant of the present invention is applied is: i) the surface of the support; ii) the surface serving as the surface and / or back of the sheet-like substrate described above;
iii) at least one selected from the group consisting of the back surface (the surface on which the water-resistant coating is not formed) and / or the surface (the surface on which the water-resistant coating is formed) of the sheet-like substrate treated with the water resistance imparting agent; One aspect. For example,
In view of the anti-adhesion property (easiness of pulling-out work) between the support (temporary buried material) and the hydraulic composition, ease of handling, measures against rainwater, etc., the above mixture layer is a sheet-like treated with a water resistance imparting agent. Back side of substrate (surface on which water-resistant coating is not formed)
More preferably, it is formed.

In the sheet-like anti-adhesion material of the present invention,
The sheet-like substrate to which the mixture is adhered may be formed by various external forces applied when the ground substructure is applied, for example, a tensile force or a shear force generated by the weight of the support or the hydraulic composition; It is preferable to use a material having a strength that can withstand an impact force, a tensile force, a frictional force with a hydraulic composition, or the like generated when the material is embedded, that is, a strength that does not break even when the external force is applied.

As the material of the sheet-like substrate, specifically, for example, a split-fiber nonwoven fabric (for example, Warif “trade name”)
Etc.), carpet, felt, asbestos cloth, asbestos felt,
Non-woven fabrics such as glass fiber non-woven fabric, glass fiber reinforced plastic, stitch-bonded non-woven fabric, needle punched non-woven fabric, etc .; fabrics such as flat yarn fiber fabric, cotton fabric, hemp fabric, band-shaped fabric, band cord, synthetic resin fabric made of polypropylene, etc. Kinds of mixed fabrics, such as woven fabrics obtained by blending polyester fibers and cotton fibers; closed cells and the like inside a material such as polystyrene, polyethylene, polypropylene, vinyl chloride resin, urethane resin, phenol resin, and rubber foam. And / or a foam formed with open cells; an elastomer sheet made of urethane rubber, silicone rubber, fluorine rubber, ether rubber, acrylic rubber, butyl rubber, neoprene (chloroprene rubber), butadiene-acrylonitrile copolymer, natural rubber, or the like; Polyethylene or poly Plastic sheets made of propylene, polyethylene terephthalate, polyamide (nylon), vinyl chloride resin, acrylic resin, etc., natural sheets such as leather sheets and wood sheets, waterproofed paper sheets, cardboard sheets, synthetic paper, aluminum and iron ,
Sheets such as metal sheets made of copper, silver, etc., alloy sheets made of stainless steel, etc., stainless steel fiber sheets, ceramic fiber sheets, metal foils made of aluminum, iron, copper, silver, etc., alloy metal foils made of stainless steel, etc. ;
Net or mesh made of polyethylene, polypropylene, polyethylene terephthalate, polyamide (nylon), vinyl chloride resin, acrylic resin, etc., net or mesh made of aluminum, iron, copper, silver, etc., net or mesh made of alloy such as stainless steel, etc. Net meshes and the like. These materials are
Only one type may be used, or two or more types may be used in combination (composite).

Among the materials exemplified above, they are excellent in water permeability and workability and are inexpensive. Therefore, split fiber nonwoven fabric, needle punched nonwoven fabric, flat yarn fiber fabric, cotton fabric, hemp fabric, band fabric, synthetic resin fabric And blended fabrics are particularly preferred.

[0104] Of the above-mentioned examples of materials having no water permeability, such as sheets, for example, cuts and holes may be formed as necessary. In this case, the shape, size, number, and formation position of the cuts and holes are
It is not particularly limited, and can be appropriately set within a range that can maintain the strength that the sheet-shaped substrate does not break even when the external force is applied.

The thickness of the sheet-like substrate may be set according to the material, and is not particularly limited.
It is more preferably in the range of 01 mm to 10 mm, and 0.05
mm to 8 mm is more preferable, and 0.2 mm to 8 mm
Particularly preferred is a range of 5 mm. When the thickness of the sheet-like base material is greater than 10 mm, the flexibility of the anti-adhesion material (coating material) may be reduced. In addition, anti-adhesion material (coating material)
Is bulky, and its handling and storage properties may be reduced. If the thickness of the sheet-like base material is less than 0.01 mm, there is a possibility that strength that can withstand external force cannot be maintained.

[0106] Incidentally, the basis weight of the sheet-like substrate may be set according to the material and thickness, but are not particularly limited, in the range of 10g / m ² ~10,000g / m ² still more preferably, in the range of 20g / m ² ~1,000g / m ² is more preferred.

The tensile strength of the sheet-shaped substrate was 9.81 N /
It is more preferably at least 2.5 cm (1 kgf / 2.5 cm), and 98.1 N / 2.5 cm (10 kgf / 2.5 cm).
2.5 cm) or more, more preferably 294
It is particularly preferable that it is N / 2.5 cm (30 kgf / 2.5 cm) or more. Tensile strength is 9.81N / 2.5c
m (1 kgf / 2.5 cm) or more, the sheet-like base material can maintain the strength that does not break even when the external force is applied. The tensile strength of the sheet-shaped substrate is 9.81 N /
If it is less than 2.5 cm (1 kgf / 2.5 cm), it tends to be broken or torn when an external force is applied.

The above tensile strength is 2.5 cm wide and 2 cm long.
After cutting to a size of 0 cm, using a test piece (sheet-like substrate) sufficiently immersed in deionized water for 30 minutes,
Using a low-speed elongation tensile tester based on the tensile test method (tensile strength) of JIS L 1096 (general textile test method), the measurement was performed under the conditions of a tensile speed of 20 mm / min and a grip interval of 10 cm. It can be determined that the larger the measured value (unit: N / 2.5 cm (kgf / 2.5 cm)) obtained by the tester, the higher the tensile strength of the sheet-shaped substrate.

If a water resistance imparting agent such as a water repellent such as an alkali water-soluble resin, a fluorine-based resin, or a silicone-based resin is treated (applied) to the sheet-like substrate in advance,
During the construction, it is possible to prevent the sheet-like anti-adhesion material from peeling off from the surface of the support due to absorption of rainwater.
In particular, those coated with an alkaline water-soluble resin (details will be described later) are not easily dissolved even when the alkaline water-soluble resin comes into contact with water having a pH in a neutral region or an acidic region such as rain (water-resistant film formation). ) So that the substrate and the mixture layer are not damaged. Therefore, even if it rains during the operation, the performance is not impaired. Therefore, for example, the support (temporary buried object) can be previously coated with an anti-adhesion material (covering material), and the coated support (temporary buried object) can be piled up at a work site. That is, simplification and rationalization of the work can be achieved as appropriate according to the situation at the work site, so that the support can be quickly constructed.

As a method of forming a water-resistant coating on the surface of the sheet-like substrate, for example, the sheet-like substrate is immersed in an alkali water-soluble resin solution for a short time and pulled up to remove an excess alkali water-soluble resin solution. Examples of the method include a drying method and a method in which an alkali water-soluble resin solution is applied to the surface layer of a sheet-shaped substrate and then dried. The support coated with the anti-adhesion material is often left overnight, but if it is rained during that time, it prevents the sheet-shaped anti-adhesion material from absorbing water and swelling before construction and becoming unusable. . Forming a water-resistant coating is more preferable because it is possible to reliably prevent the water absorption and swelling of the anti-adhesion material in advance. On the other hand, the alkaline water-soluble resin dissolves when it comes into contact with alkaline water. That is, the alkaline water-soluble resin starts dissolving when it comes into contact with the hydraulic composition, and the hydraulic composition that has passed through the sheet-like base material is absorbed by the mixture layer containing the water-absorbing agent and the hydrophobic lubricant. A swollen gel layer is formed between the hard composition layer and the anti-adhesion material. Therefore, it is possible to easily separate and remove the support (temporary buried material) and the cured product of the hydraulic composition.

The sheet-like substrate composited with the mixture of the water-absorbent resin and the hydrophobic lubricant, that is, the sheet-like anti-adhesion material (coating material) covers the support (eg, H-section steel). It is more preferably formed in a shape and size that can be used, but as described later in detail, it is particularly preferably formed in a bag shape or a tubular shape into which a support can be inserted. By forming the anti-adhesive material in a bag shape or a cylindrical shape, a large and heavy temporary buried material such as an H-shaped steel can be more easily and quickly covered, so that workability at a work site is improved. It can be further improved. Further, a sheet-like shape for sticking to the surface of the support using the tackiness of the hydrophobic lubricant is also preferable.
In particular, the shape of a three-layer sheet in which a hydrophobic lubricating layer is formed between two water-absorbing lubricating layer sheets is preferable from the viewpoints of workability, safety, and reduction of waste material (removal material is unnecessary).

In the resin layer of the above mixture, a water-containing gel layer swelled by absorbing water is formed between the sheet-like substrate and the cured product of the hydraulic composition. When a resin layer composed of a water-absorbent resin of a water-absorbing agent and a hydrophobic lubricant is disposed between the support and the hydraulic composition, the support (temporary buried material) and the cured product of the hydraulic composition will Since a swollen water-absorbed swelled hydrogel layer can be formed, the adhesion between the two can be further suppressed. Thereby, when the support (temporary buried material) is pulled out from the cured product of the hydraulic composition, the swollen gel layer exerts a lubricating effect, so that the support (temporary buried material) is removed.
Becomes slippery. Accordingly, the labor (tensile force) in the operation of pulling out the support (temporary buried material) from the cured product of the hydraulic composition can be further reduced, and the workability of the operation can be improved. Further, by drying the gel layer, a slight gap can be formed between the support (temporary embedding material) and the cured product of the hydraulic composition, so that the workability of the above operation is further improved. Can be done.

The ratio of the mixture layer (resin layer) to the sheet-like base material, that is, the amount of the mixture of the water-absorbent resin and the hydrophobic lubricant per unit area of the sheet-like base material, is determined by the composition of the two. And the combination may be set according to the working environment and the like, and are not particularly limited, but from the viewpoint of satisfying both the above-mentioned anti-adhesion property and the productivity of application to the sheet substrate, 1 g / m ² to 10 g / m ^2. , more preferably in the range of ^{000g / m 2, 10g / m} 2 ~1,000g / m 2
Is more preferably in the range of 20 g / m ^{2 to} 500 g / m
Particularly preferred is a range of m ² . The sheet-like substrate 100
The ratio of the alkali water-soluble resin and the water-absorbing resin to parts by weight is from 1 part by weight to 10,000 from the viewpoint of satisfying both the above-described anti-adhesion property and the productivity of application to the sheet substrate.
It is more preferably in the range of 10 parts by weight to 1,000 parts by weight.
0 parts by weight is more preferable, and 20 parts by weight to 50 parts by weight.
Particularly preferred is a range of 0 parts by weight.

The method for forming a mixture layer (resin layer) containing a hydrophobic lubricant and a water-absorbing resin on the surface of the sheet-like substrate is not particularly limited. A method in which a mixture containing a lubricant and a water-absorbing resin is directly (solvent-free) applied to the surface of a sheet-like substrate by brushing or using a roller; a method of spraying (spraying); At that time, it is preferable from the viewpoint of workability that the mixture containing the hydrophobic lubricant and the water-absorbent resin is melted by heating (at or above the melting point). A method of spraying (spraying) a dispersion (resin solution) obtained by dispersing (or dissolving) the above mixture in a dispersion medium such as an organic solvent on the surface of a sheet-like substrate; A method of applying using a roller; a method of impregnating a sheet-like substrate with a resin dispersion liquid; and the like may be employed. Further, after spraying or applying the hydrophobic lubricant solution or the hydrophobic lubricant dispersion to the surface of the sheet-like substrate, the water-absorbing resin is evenly spread on the surface,
Further, a method of spraying or applying the solution or the dispersion liquid thereon may be employed. Among the above exemplified methods, the method of directly (non-solvent) applying a mixture containing a hydrophobic lubricant and a water-absorbing resin to the surface of a sheet-like substrate by brushing or using a roller is a work-related and manufacturing method. Moreover, it is more preferable because it is easy, and drying is unnecessary because it is solventless. Further, a method in which a mixture containing a hydrophobic lubricant and a water-absorbent resin, which is heated and melted, is continuously applied while controlling the amount of adhesion by adjusting the clearance between upper and lower rollers is particularly preferable. As a result, a resin layer of the above mixture is formed on the sheet-like substrate surface (outer surface and / or inner surface).

In the sheet-like anti-adhesion material of the present invention, it is more preferable that the above-mentioned sheet-like base material is formed on the outer surface in a state where the support (temporary buried material) is covered. That is, it is particularly preferable that the sheet-like base material layer is disposed on the hydraulic composition layer side and the mixture layer containing the water absorbing agent and the hydrophobic lubricant is disposed on the support side. By disposing the sheet-like substrate layer on the side of the hydraulic composition layer and disposing the mixture layer on the surface side of the support, the mixture containing the semisolid hydrophobic lubricant having tackiness is provided. Since the layer is in close contact with the surface of the support together with the water-absorbing agent, it is possible to improve the workability of embedding and prevent a decrease in the anti-adhesion property due to breakage of the sheet-shaped anti-adhesion material (coating material). Also, for example, the lubricating performance of a water-absorbing agent (gel) that has absorbed cement water and a hydrophobic lubricant works synergistically on the surface of the support, and the work of pulling out the support (temporary buried material) can be performed more easily. Can be. Further, since the pulled-out support is pulled out and removed with a low load, damage and deformation of the support are extremely small, and the support can be recycled.

The thickness of the mixture layer containing the water absorbing agent and the hydrophobic lubricant is preferably in the range of 1 μm to 10,000 μm, more preferably in the range of 10 μm to 5,000 μm, and further preferably in the range of 100 μm to 2,000 μm. Particularly preferred is a range of 300 μm to 1,000 μm. If the film thickness is less than 10 μm, the separability and lubricity between the cured product of the hydraulic composition and the support are reduced, and the adhesion of the anti-adhesion material to the support is also undesirably reduced. On the other hand, when the film thickness exceeds 10,000 μm, the weight and bulk of the obtained anti-adhesion material are increased, and the handling property (workability) and the workability at the time of production are undesirably reduced.

The amount of the mixture adhering to the sheet-like substrate or the support (temporary embedding material), that is, the amount per unit area, is determined by the state of the surface of the sheet-like substrate or the support (temporary embedding material) (irregularities). Etc.), may be set according to the composition and combination of the two, the working environment and the like, and are not particularly limited, but from the viewpoint of satisfying both the coating processability and the adhesion, 1 g / m ² to preferably in the range of 10,000 g / m ^2, more preferably in the range of ^{10g / m 2 ~5,000g / m 2} , 100g / m 2 ~2,000g /
m ² is more preferably in the range of 300 g / m ² to 1,
Particularly preferred is a range of 000 g / m ² . 1g adhesion amount
If it is less than / m ² , the separability and lubricity between the cured product of the hydraulic composition and the support are reduced, and the adhesion of the anti-adhesive to the support is also undesirably reduced. On the other hand, the adhesion amount is 10,000
When it exceeds 0 g / m ² , the weight and bulk of the obtained anti-adhesion material are increased, and the handling property (workability) and the workability at the time of production are undesirably reduced.

The ratio of the mixture to 100 parts by weight of the sheet-like substrate is more preferably in the range of 1 part by weight to 10,000 parts by weight from the viewpoint of satisfying both the coating processability and the adhesiveness. More preferably, the range is from 10 parts by weight to 2,000 parts by weight, and more preferably from 20 parts by weight to 1,000 parts by weight.
Particularly preferred is in the range of parts by weight.

Next, the third feature of the anti-adhesion material of the present invention is that a water-absorbing lubricating layer and a hydrophobic lubricating layer are combined (laminated).
And they are used together. As a result, the anti-adhesion material of the present invention is a material that has achieved simultaneous progress in many aspects such as anti-adhesion property, workability, safety, and recyclability of the support, which have never been seen before.

The form of the third anti-adhesion material of the present invention will be described in detail below, but examples include the following forms.

I) Water-absorbing lubricating layer sheet in which a water-absorbing agent is formed on a sheet-like substrate via a bonding agent or the like (water-absorbing lubricating layer)
A hydrophobic lubricating layer formed by applying a hydrophobic lubricant on at least one surface, and a water-absorbing lubricating layer formed on both surfaces of a hydrophobic lubricating layer containing a hydrophobic lubricant or two sheets A three-layer sheet in which a hydrophobic lubricating layer is formed between the water-absorbing lubricating layer sheets (constitution: water-absorbing lubricating layer / hydrophobic lubricating layer / water-absorbing lubricating layer), ii) at least one surface of the sheet-shaped substrate is hydrophobic Composite of a hydrophobic lubricating layer sheet formed with a hydrophobic lubricant and a water-absorbing lubricating layer sheet, iii) applying a hydrophobic lubricant directly to the surface of the support or laminating the hydrophobic lubricating layer sheet After forming a hydrophobic lubricating layer by, for example, applying a liquid composition containing a water-absorbing agent such as a water-absorbing resin and a bonding agent such as an alkali-water-soluble resin or natural rubber from above the hydrophobic lubricating layer, Hydrophobic lubricating layer sheet A form in which a water-absorbing lubricating layer is formed by laminating, or directly applying a liquid composition containing a water-absorbing agent and a bonding agent on the surface of a support or laminating a water-absorbing lubricating layer sheet After forming the water-absorbing lubricating layer by, for example, applying a hydrophobic lubricant from above the water-absorbing lubricating layer or laminating the hydrophobic lubricating layer sheet to form the hydrophobic lubricating layer And iv) those in which the above-mentioned hydrophobic lubricating layer and the above-mentioned water-absorbing lubricating layer are alternately laminated directly on the surface of a support. Above all, a water-absorbing lubricating layer sheet (water-absorbing lubricating layer) in which a water-absorbing agent is formed on a sheet-like base material by applying a hydrophobic lubricant on at least one side thereof is formed into a hydrophobic lubricating layer. Those are preferable from the viewpoint of the anti-adhesion property, workability, manufacturing processability, economical efficiency, etc., and those having a water-absorbing lubricating layer formed on both sides of a hydrophobic lubricating layer containing a hydrophobic lubricant or two sheets Three-layer sheet in which a hydrophobic lubricating layer is formed between water-absorbing lubricating layer sheets (structure: water-absorbing lubricating layer / hydrophobic lubricating layer / water-absorbing lubricating layer)
Is particularly preferable in terms of the anti-adhesion property, workability, manufacturing processability, economy, reduction of waste materials, and the like.

The above-mentioned bonding agent is not particularly limited as long as it can form a film. Various types of water-soluble resins, hydrophobic resins, alkali-water-soluble resins, natural rubber, isoprene rubber, chloroprene rubber, Examples of the rubber-based resin include flexible resins such as urethane rubber, silicone rubber, acrylic rubber, liquid rubber, and elastomer. Among them, as a bonding agent, a water-soluble resin, an alkali-water-soluble resin, or The above-mentioned flexible resin having a small force to inhibit swelling of the conductive resin is preferable. Further, from the viewpoints of anti-adhesion properties and low falling-off properties, an alkali water-soluble resin or a flexible resin having a small force to inhibit swelling of the water-absorbing resin upon absorbing water is preferable. As the flexible resin, a resin having the following coating film Gurley hardness is preferably 1000 (mgf) {N} or less, more preferably 700 (mgf) {N} or less, and 500 (mgf) {N}. The following resin is more preferred, and the resin of 400 (mgf) {N} or less is particularly preferred. As a specific example, the coating film Gurley hardness is 500 (mgf) {N}.
The following natural rubber resins are mentioned. If the coating Gurley hardness exceeds 1000 (mgf) {N}, the resin becomes hard, impairing the water absorption and swelling properties of the water-absorbing resin, and lowering the anti-adhesion property. (Coating film Gurley softness) The coating Gurley softness is measured and calculated by the following method. Gurley rigidity 250 ± 50
(mgf) The sample resin is applied to a nonwoven fabric substrate of {N} having a thickness of 0.4 to 0.5 mm so that the dry application amount is 250 g / m2. The degree of flexibility of the coated substrate is determined according to JIS L109.
6.20 (General textile test method), bending resistance
It is measured and calculated based on the A method (Gurley method). The obtained Gurley Bending Softness is defined as the coating Gurley Bending Softness of the sample resin.

The hydraulic composition according to the third anti-adhesion material of the present invention is the same as the description of the hydraulic composition (specific examples, types, compressive strength, etc.). Examples of the hydraulic composition include fluidized soil mixed with cement components used for cement, various types of concrete, various types of mortar, cement milk, soil cement, backfill soil, and the like, water glass, and the like.

Further, the description of the support is the same as the description of the support (specific examples, types, shapes, etc.). H-shaped steel, I-shaped steel, steel columns, concrete piles, poles, tubular piles (hollow piles), steel sheet piles (sheet piles) that are long plate-shaped piles, corrugated sheets, formwork, steel cages as supports A plug for treating a pile head is exemplified.

The hydraulic composition and the support were firmly adhered to each other when they contacted and cured, and it was difficult to pull out or separate and remove the support. However, excellent lubricity of the water-absorbing lubricating layer and the hydrophobic lubricating layer by interposing the third anti-adhesion material of the present invention between both the hydraulic composition and the support,
Due to the separability, the adhesion between the two can be prevented, and the hydraulic composition and the support can be easily pulled out or separated and removed.

The water-absorbing lubricating layer sheet, which is a main constituent material of the water-absorbing lubricating layer according to the present invention, has a weight of 30% after immersing it in deionized water for 1 hour with a weight.
Weight after air drying for 2 seconds is twice (g / g) of its own weight at the time of drying
The above is preferably 5 times or more, more preferably 10 times or more, particularly preferably 20 times or more, and is not particularly limited as long as it is twice or more its own weight. If the weight of water absorption is less than twice its own weight, sufficient lubrication and separation effects may not be exhibited due to a small amount of water or hydrogel acting as a lubricating component. Basically, the larger the water absorption weight (water absorption ratio), the more the adhesion between the hydraulic composition and the support can be prevented.

Specific examples of the water-absorbing lubricating layer sheet to be the water-absorbing lubricating layer include a nonwoven fabric, a woven fabric, a blended woven fabric, a foam formed with open cells, a wood sheet having a water absorption weight of at least twice its own weight. , Paper sheets, cardboard sheets, synthetic paper and other porous materials, water-absorbent fiber sheets made from water-absorbent fibers,
Alternatively, a water-absorbent resin sheet or the like constituted at least from a water-absorbent resin having a small particle size and a sheet-like base material. These water-absorbing lubricating layer sheets may use only one type,
Further, two or more kinds may be used in combination (composite). Among the above materials, a water-absorbent fiber sheet and a water-absorbent resin sheet are preferable from the viewpoint of lubrication performance, but a water-absorbent resin sheet containing a water-absorbent resin is more preferable.

The water-absorbent resin sheet is formed by bonding the water-absorbent resin with various bonding agents such as a bonding agent of a hydrophobic resin, a bonding agent of a water-soluble resin, a bonding agent of an alkali water-soluble resin, a natural or synthetic rubber bonding agent. Can be made by adhering to a water-based substrate, but preferred as a bonding agent for adhering a water-absorbing resin is a water-soluble resin bonding agent or an alkaline water-soluble resin from the viewpoint of not impairing the water-absorbing swellability of the water-absorbing resin. The following coating film has a Gurley hardness of 1000 (mgf) {N}.
Or less, more preferably 700 (mgf) {N} or less, still more preferably 500 (mgf) {N} or less, and particularly preferably 4 (mgf) {N} or less.
A bonding agent of a flexible resin of not more than 00 (mgf) {N} is exemplified. Among them, the alkali water-soluble resin having a water-absorbing resin falling-preventing property and a coating Gurley hardness of 500 (mgf)
Hydrophobic resins of {N} or less are particularly preferred. A specific example is a natural rubber resin having a coating film Gurley hardness of 500 (mgf) {N} or less. Gurley hardness of coating film is 1000
(mgf) If it exceeds {N}, the resin becomes hard and impairs the water absorption and swelling properties of the water-absorbing resin, thereby lowering the anti-adhesion property.

The sheet-like base material constituting the water-absorbent resin sheet according to the present invention is the same as the description of the above-mentioned sheet-like base material (specific examples, material, type, thickness, basis weight, strength, etc.). Examples of the sheet-like substrate include various nonwoven fabrics and woven fabrics such as blended woven fabrics.

The sheet-like substrate composited with the water-absorbing resin, that is, the anti-adhesion material (coating material) is a support (for example, H
It is more preferably formed in a shape and a size that can cover the (shape steel), but as described in detail later, it is formed in a bag shape or a cylindrical shape into which the support can be inserted. Is particularly preferred. By forming the anti-adhesion material in a bag shape or a cylindrical shape, the large and heavy H
Since the temporary buried object such as a shaped steel can be more easily and quickly coated, the workability at the work site can be further improved. Further, a sheet-like shape for sticking to the surface of the support using the adhesiveness of the hydrophobic lubricating layer is also preferable. In particular, the shape of a three-layer sheet in which a hydrophobic lubricating layer is formed between two water-absorbing lubricating layer sheets is excellent in workability,
It is preferable from the viewpoints of safety and reduction of waste material (removal material is unnecessary).

The alkaline water-soluble resin which is a suitable bonding agent for attaching the water-absorbing resin to the water-absorbing lubricating layer sheet and which serves as the above-mentioned suitable water-resistance imparting agent does not dissolve in neutral or acidic water. Any resin can be used as long as it is soluble in alkaline water, and is not particularly limited.
A resin which is not less than mgKOH / g and which is non-swelling with respect to deionized water, that is, a resin whose absorption capacity of deionized water with respect to its own weight is less than 2 times is preferable.

As the alkali water-soluble resin, for example, a resin having a substituent such as a carboxylic acid group, a sulfonic acid group and a phosphonic acid group, a novolak resin containing a phenolic hydroxyl group, and a polyvinyl phenol resin are more preferable. A resin obtained by copolymerizing an α, β-unsaturated carboxylic acid monomer and a vinyl monomer is excellent in solubility in alkaline water and economical efficiency, and
It is particularly preferable because the resin layer of the water-absorbent resin and the alkali water-soluble resin formed on the surface of the sheet-like base material is excellent in various physical properties. Further, a resin having a carboxylic acid group,
Cellulose derivatives such as hydroxypropylmethylcellulose phthalate, hydroxypropylmethylcellulose acetate succinate, cellulose acetate hexahydrophthalate, hydroxypropylmethylcellulose acetate phthalate, and hydroxypropylmethylcellulose hexahydrophthalate can also be used as the alkali water-soluble resin.

Specific examples of the α, β-unsaturated carboxylic acid monomer include α, β-unsaturated monocarboxylic acids such as acrylic acid and methacrylic acid; itaconic acid, maleic acid and fumaric acid. Α, β-unsaturated dicarboxylic acids such as maleic anhydride and itaconic anhydride; α, β-unsaturated dicarboxylic acid anhydrides such as maleic anhydride, itaconic anhydride; -Unsaturated dicarboxylic acid monoester; and the like, but are not particularly limited. One kind of these α, β-unsaturated carboxylic acid monomers may be used alone, or two or more kinds thereof may be used in combination. Among the α, β-unsaturated carboxylic acid-based monomers exemplified above, acrylic acid and methacrylic acid have the flexibility of a resin layer of a water-absorbing resin and an alkali-water-soluble resin formed on the surface of the sheet-like base material. It is more preferable because it is more excellent in toughness.

Specific examples of the vinyl monomer include methyl acrylate, ethyl acrylate, propyl acrylate, butyl acrylate, stearyl acrylate, methyl methacrylate, ethyl methacrylate, propyl methacrylate, and the like. Esters of C1-18 monohydric alcohols such as butyl methacrylate and stearyl methacrylate with (meth) acrylic acid; vinyl monomers containing nitrile groups such as acrylonitrile and methacrylonitrile; acrylamide, methacrylamide and the like An amide group-containing vinyl monomer; a hydroxyl group-containing vinyl monomer such as hydroxyethyl acrylate and hydroxypropyl methacrylate;
Epoxy group-containing vinyl monomers such as glycidyl methacrylate; α, β such as zinc acrylate and zinc methacrylate
Metal salts of unsaturated carboxylic acids; aromatic vinyl monomers such as styrene and α-methylstyrene; aliphatic vinyl monomers such as vinyl acetate; vinyl chloride, vinyl bromide, vinyl iodide, vinylidene chloride Halogen-containing vinyl monomers such as allyl ethers; maleic anhydrides such as maleic anhydride, monoalkyl maleate, dialkyl maleate; monoalkyl fumarate;
Fumaric acid derivatives such as dialkyl fumarate; maleimide derivatives such as maleimide, N-methylmaleimide, N-stearylmaleimide, N-phenylmaleimide, N-cyclohexylmaleimide; monoalkyl itaconate, dialkyl itaconate, itaconamides , Itaconic acid derivatives such as itaconic imides and itaconic amide esters; alkenes such as ethylene and propylene; dienes such as butadiene and isoprene; and the like, but are not particularly limited. One of these vinyl monomers may be used alone, or two or more thereof may be used in combination.

Of the vinyl monomers exemplified above, alkyl acrylates and alkyl methacrylates are more preferred because the resin layer formed on the surface of the sheet-like substrate is more excellent in flexibility, weather resistance and toughness. . Further, by setting the ratio of the alkyl (meth) acrylate in the vinyl monomer to 30% by weight or more,
It is particularly preferable because the flexibility, weather resistance and toughness of the resin layer are further improved. Further, when the alkyl (meth) acrylate is an ester of a monohydric alcohol having 1 to 18 carbon atoms and (meth) acrylic acid, the flexibility, weather resistance and toughness of the resin layer are particularly improved. So most preferred.

The ratio of the α, β-unsaturated carboxylic acid monomer to the total amount of the α, β-unsaturated carboxylic acid monomer and the vinyl monomer is 9% by weight or more. More preferably, it is more preferably in the range of 9% by weight to 40% by weight. By setting the proportion of the α, β-unsaturated carboxylic acid-based monomer to 9% by weight or more, it is possible to obtain an alkali water-soluble resin having more excellent solubility in alkaline water. By setting the proportion of the α, β-unsaturated carboxylic acid-based monomer in the range of 9% by weight to 40% by weight, in addition to solubility in alkaline water, flexibility, weather resistance, and toughness are particularly excellent. An alkali water-soluble resin can be obtained.

By copolymerizing the above-mentioned α, β-unsaturated carboxylic acid monomer and vinyl monomer, an alkali water-soluble resin can be obtained. The copolymerization method, that is, the method for producing the alkali water-soluble resin is not particularly limited. The average molecular weight of the alkaline water-soluble resin may be set according to the composition of the hydraulic composition, the pH of the alkaline water, the working environment, and the like, and is not particularly limited. The alkaline water-soluble resin according to the present invention is excellent in solubility in alkaline water. There is no fear. Therefore, the water absorbing resin can sufficiently exhibit its water absorbing properties (performance).

The acid value of the alkali water-soluble resin according to the present invention is preferably 15 mgKOH / g or more.
More preferably 30 mgKOH / g or more,
0 mgKOH / g or more, more preferably 7 mgKOH / g or more.
0 mgKOH / g or more is particularly preferable.
Most preferably, it is in the range of mgKOH / g to 500 mgKOH / g. Acid value of alkali water soluble resin is 1
If the amount is less than 5 mgKOH / g, the solubility in alkaline water becomes poor, and the work of pulling out the support may not be easily performed (pullability may be reduced). If the acid value of the alkaline water-soluble resin exceeds 500 mgKOH / g, the water resistance of the alkaline water-soluble resin is reduced, so that the resin layer formed on the surface of the sheet-like substrate has a neutral property such as rain. Contacting with water exhibiting a pH in a water or acidic range may cause dissolution of the alkali water-soluble resin or swelling of the water-absorbing resin, resulting in damage. For this reason, there is a possibility that the work of coating the anti-adhesion material (coating material) and the work of burying the support may be hindered, and the pull-out property of the support may be adversely affected. Further, there is a possibility that the resin layer may be easily peeled off or sticky from the sheet-like base material due to a temperature change at the work site. The method for measuring the acid value is not particularly limited.

The alkali water-soluble resin according to the present invention comprises:
Differential scanning calorimetry (DSC)
lorimetry), the peak of the DSC differential curve (the inflection point of the DSC curve), that is, one glass transition temperature in the range of -80 ° C to 120 ° C, more preferably two or more. I have. The alkali water-soluble resin may have a low glass transition temperature in a range of -30C to 20C, and a high glass transition temperature in a range of 40C to 100C. More preferred.
The method for measuring the glass transition temperature, that is, the measurement conditions for the differential scanning calorimetry are not particularly limited. When the glass transition temperature on the low temperature side is in the range of −30 ° C. to 20 ° C., there is no possibility that the resin layer is peeled off from the sheet-like substrate even when the work site is at low temperature, for example, in winter. Further, the glass transition temperature on the high temperature side is 40 ° C to 100 ° C.
By being within the range of ° C., there is no danger that the resin layer will become sticky even when the work site is at a high temperature, for example, in summer. Therefore, the alkali water-soluble resin is -30 ° C
When the glass transition temperature on the low temperature side is in the range of 20 ° C., and the glass transition temperature on the high temperature side is in the range of 40 ° C. to 100 ° C., it is stable without being affected by temperature changes in the work site. It is possible to form a resin layer, that is, a resin layer that is hardly peeled off and sticky.

In the water-absorbing lubricating layer of the third anti-adhesion material of the present invention, it is the most preferred embodiment to use an alkali water-soluble resin and a water-absorbing resin together. The description of the water-absorbent resin is the same as that described above for the water-absorbent resin (specific examples, types, particle diameters, etc.). For example, crosslinked poly (meth) acrylic acid, crosslinked poly (meth) acrylate, crosslinked poly (meth) acrylate having a sulfonic acid group, crosslinked poly (meth) acrylate having a polyoxyalkylene group , Poly (meth) acrylamide crosslinked product, (meth) acrylate and (meth) acrylate
A crosslinked copolymer of acrylamide and a crosslinked copolymer of hydroxyalkyl (meth) acrylate and (meth) acrylate are exemplified.

As in the case of forming a resin layer composed of an alkali water-soluble resin and a water-absorbing resin by attaching a water-absorbing resin to the surface of the sheet-like base material using an alkali water-soluble resin as a bonding agent, When the layer contains a water-absorbing resin, a water-containing gel layer swelled by absorbing water is formed between the sheet-like substrate and the cured product of the hydraulic composition. When a resin layer composed of a water-absorbing resin and an alkali water-soluble resin of the water-absorbing lubricating layer is disposed between the support and the hydraulic composition, the support (temporary buried material) and the cured product of the hydraulic composition can be mixed. In the meantime, a swollen water-absorbed swollen hydrogel layer can be formed, so that the adhesion between the two can be further suppressed. Accordingly, when the support (temporary buried material) is pulled out from the cured product of the hydraulic composition, the swollen gel layer exerts a lubricating effect, so that the support (temporary buried material) becomes slippery. Accordingly, the labor (tensile force) in the operation of pulling out the support (temporary buried material) from the cured product of the hydraulic composition can be further reduced, and the workability of the operation can be improved. Further, by drying the gel layer, a slight gap can be formed between the support (temporary embedding material) and the cured product of the hydraulic composition, so that the workability of the above operation is further improved. Can be done.

When the alkali water-soluble resin and the water-absorbing resin are used (mixed) in combination (mixing), that is, the ratio of the alkali water-soluble resin and the water-absorbing resin in the resin layer depends on the composition and combination of the two and the working environment. Although it is not particularly limited, the weight ratio may be set according to the water absorption swelling property and the adhesion (non-dropping property) of the water-absorbing resin. The range of 1 is more preferable, the range of 10/90 to 90/10 is still more preferable, and the range of 25/75 to 75/25 is particularly preferable.

The ratio of the resin layer to the sheet-like base material, that is, the adhesion amount of the alkali water-soluble resin and the water-absorbent resin per unit area of the sheet-like base material depends on the composition and combination of the two and the working environment. It may be set Te, not particularly limited, but from the viewpoint of satisfying both the coating productivity for the adhesion prevention properties and the sheet substrate, 1g / m ² ~10,000g / m in the range of ² It is more preferable, more preferably in the range of ^{10g / m 2 ~1,000g / m 2} , in the range of 20g / m ² ~500g / m ² is particularly preferred. In addition, the ratio of the alkali water-soluble resin and the water-absorbing resin to 100 parts by weight of the sheet-like substrate is from 1 part by weight to 10,000 from the viewpoint of satisfying both the above anti-adhesion property and the productivity of application to the sheet substrate. It is more preferably in the range of 10 parts by weight, more preferably in the range of 10 parts by weight to 1,000 parts by weight, and particularly preferably in the range of 20 parts by weight to 500 parts by weight.

The method for forming the resin layer on the surface of the sheet-like base material is not particularly limited. Specifically, for example, when an alkali water-soluble resin and a water-absorbing resin are used in combination, both methods are used. (Dispersion solution) obtained by dispersing (or dissolving) in a dispersion medium such as an organic solvent or water onto the surface of a sheet-like substrate; brushing the resin dispersion or using a roller And a method of impregnating a sheet-like substrate with a resin dispersion. Alternatively, after a solution or dispersion containing an alkali water-soluble resin is sprayed or applied to the surface of the sheet-like substrate, the water-absorbent resin is evenly spread on the surface, and the solution or dispersion is further sprayed or applied thereon. And the like. Among the above exemplified methods, a dispersion (resin solution) obtained by dispersing (or dissolving) an alkali water-soluble resin and a water-absorbent resin in a dispersion medium such as an organic solvent or water is sprayed on the sheet-like substrate surface ( The method of spraying or coating is more preferable because it is easy in terms of work and production, and a method of continuous coating while controlling the amount of adhesion by adjusting the clearance between upper and lower rollers is particularly preferable. The dispersion or the like applied to the sheet-like substrate may be dried as necessary. Thereby, a resin layer is formed on the sheet-like substrate surface (outer surface and / or inner surface). When the water-absorbing resin is not used, the step of dispersing the water-absorbing resin and the step of spraying the water-absorbing resin in the above method may be omitted.

In the anti-adhesion material, the outer surface in a state where the support (temporary buried material) is covered,
More preferably, the resin layer is formed. That is, it is particularly preferable that the water-absorbing lubricating layer is provided on the side of the hydraulic composition layer. It is particularly preferable that a hydrophobic lubricating layer is provided on the support side. By disposing the water-absorbing lubricating layer on the side of the hydraulic composition layer and disposing the hydrophobic lubricating layer on the surface side of the support, the water-absorbing lubricating layer containing the water-absorbing agent can be a liquid of the hydraulic composition. Can be sufficiently absorbed and swelled, and the above-mentioned adhesion preventing effect can be further exhibited. In addition, since the hydrophobic lubricating layer containing a semisolid hydrophobic lubricant having tackiness adheres to the surface of the support together with the water-absorbing lubricating layer, the workability of the building can be improved, and the adhesion preventing material (coating material) can be improved. ) Can be prevented from lowering due to damage. Further, the lubricating layer functions of the water-absorbing lubricating layer and the hydrophobic lubricating layer work synergistically, and the work of pulling out the support (temporary buried material) can be performed more easily. In addition, since the hydrophobic lubricating layer is disposed between the support and the water-absorbing lubricating layer, for example, an alkali water-soluble resin (a bonding agent for the water-absorbing lubricating layer) dissolved in alkaline water is used as the support (temporary buried material). Since the adhesion to the surface is reduced, the surface of the pulled-out support (temporary buried object) can be kept in a clean state. Enables recycling of the support. Also,
When using an anti-adhesion material having a sheet-like base material in which the water-absorbing agent and the binder resin of the water-absorbing lubrication layer are omitted and a hydrophobic lubrication layer containing a hydrophobic lubricant, the side of the hydraulic composition layer is used. Since the sheet-like base material layer is disposed on the substrate and the hydrophobic lubricating layer is disposed on the surface side of the support, the anti-adhesion material adheres to the surface of the support, so that the workability of the built-in material can be improved and the adhesion can be improved. It is possible to prevent a decrease in anti-adhesion property due to breakage of the prevention material (coating material).

The method for preparing the resin dispersion containing the alkali water-soluble resin and the water-absorbing resin is not particularly limited. Specific examples of the organic solvent include methyl alcohol, ethyl alcohol, isopropyl alcohol, benzene, toluene, acetone, methyl ethyl ketone, ethyl acetate, and butyl acetate; ethylene glycol, ethylene glycol monomethyl ether, and ethylene glycol monomethyl ether. Polyhydric alcohols and derivatives thereof, such as acetate and polypropylene glycol monomethyl ether acetate; and the like, but are not particularly limited. The thickness of the resin layer is 1
A value of about 0 μm is sufficient, but may be set according to the particle size of the water-absorbing resin and is not particularly limited.

The alkaline water-soluble resin in the resin layer does not readily dissolve even when it comes into contact with water having a pH in a neutral or acidic range such as rain. That is, the alkali water-soluble resin has excellent water resistance, and does not damage even when it comes into contact with water having a pH in a neutral or acidic range. Therefore, even if it rains during the operation, the performance is not impaired. In addition, when constructing a structure, a support (temporary buried object) must be
Can be coated with an anti-adhesion material. For example, a support (temporary buried material) is previously coated with an anti-adhesion material (coating material), and It can also be piled up on the ground. That is, simplification and rationalization of the work can be appropriately achieved according to the situation of the work site, so that the structure can be quickly constructed. Further, if necessary, a water-resistant coating made of a water-resistance imparting agent may be formed on the surface of the resin layer (a so-called top coat). Examples of the water resistance imparting agent include a wax, a fluorine-based resin, a silicone-based resin, and the above-described alkali water-soluble resin. As a method for forming a water-resistant coating on the surface of the resin layer (water-absorbing lubricating layer), for example, a water-absorbing lubricating layer sheet, that is, a sheet-like substrate having a water-absorbing resin adhered thereto, is briefly applied to the alkaline water-soluble resin solution. Examples of the method include immersing and lifting to remove excess alkali water-soluble resin solution and drying, and a method of applying the alkali water-soluble resin solution to the surface layer of the water-absorbent resin layer of the water-absorbent lubricating layer sheet and drying. The support coated with the anti-adhesion material is often left overnight, but if it is rained during the leaving, the anti-adhesion material may absorb water and swell before use and may become unusable. By forming a water-resistant coating, it is possible to more reliably prevent the water absorption and swelling of the anti-adhesion material in advance, and thus it is more preferable to form a water-resistant coating.

On the other hand, the alkaline water-soluble resin dissolves when it comes into contact with alkaline water. That is, when the resin layer comes into contact with the hydraulic composition, the alkali water-soluble resin starts dissolving, and forms, for example, a swollen water-absorbent resin gel layer between the hydraulic composition and the anti-adhesion material. It is supposed to. Therefore, the workability of the operation of pulling out the support (temporary buried material) from the cured product of the hydraulic composition can be improved.

As described above, by applying at least the resin dispersion (coating material) obtained by mixing an alkali water-soluble resin and a water-absorbing resin to a sheet-like substrate, excellent anti-adhesion properties are obtained. A water-absorbent lubricating layer sheet is obtained, and the resin dispersion obtained by mixing the alkali-water-soluble resin and the water-absorbent resin is also used as a water-absorbing lubricating layer forming paint. In the present invention, the water-absorbing lubricating layer forming paint is not particularly limited as long as it contains at least a water-absorbing resin, but at least the water-absorbing lubricating layer forming paint containing an alkali water-soluble resin and a water-absorbing resin has an anti-adhesive property. Particularly preferred from the viewpoint. The water-absorbing lubricating layer forming paint is difficult to cover with a sheet-like water-absorbing lubricating layer sheet, and is effective for covering (applying) uneven portions and narrow gaps.

The alkali water-soluble resin is most suitable as a bonding material for forming a water-absorbing lubricating layer by adhering a water-absorbing resin to the surface of a support or a sheet-like substrate, but is also applied as another optimum bonding agent. Membrane softness is 1000 (mgf) {N}
Or less, preferably 700 (mgf) {N} or less, more preferably 500 (mgf) {N} or less, still more preferably 400 (mgf) {N} or less.
(mgf) {N} The following resins are exemplified. A resin with a coating film Gurley stiffness of 1000 (mgf) {N} or less has excellent flexibility,
It has the characteristic of not impairing the water absorption and swelling of the water absorbent resin due to elasticity, and the coating film Gurley softness is 1000 (mgf)
The hydrophobic resin of {N} or less can also prevent the water absorbent resin from falling off. Various coatings Gurley hardness of 1000 (m
gf) Among resins of {N} or less, coating film Gurley hardness is 5
A natural rubber resin of not more than 00 (mgf) {N} is preferable from the viewpoints of joining performance, anti-adhesion property, economy, suppression of falling off of the water-absorbing resin and the like. A particularly preferred anti-adhesion material is an anti-adhesion material containing at least a bonding agent containing a resin having a coating film Gurley stiffness of 1000 (mgf) {N} or less and a water-absorbing resin. Examples of the form of the adhesion preventing material include a sheet form and a coating type (liquid form). Various conditions such as a coating method, a coating amount, and a blending amount of a resin having a coating film Gurley hardness of 1000 (mgf) {N} or less are basically the same as the conditions for the above-mentioned alkaline water-soluble resin.

In addition, the alkali water-soluble resin (the former)
And a resin (the latter) having a Gurley hardness of 1000 (mgf) {N} or less may be used by mixing or laminating. The dry weight ratio when mixing or laminating is the former weight:
The latter weight = 1: 99-99: 1, preferably 2: 70-
It is in the range of 98:30 weight ratio. Further, the former weight is 5 to 50% by weight based on the latter weight (the former resin is top-coated on the surface of the latter resin) to prevent adhesion.
It is particularly preferable from the viewpoint of rain measures and the like. It is also preferable to prepare a polymerization composition to produce an alkali water-soluble resin having a coating film Gurley hardness of 1000 (mgf) {N} or less, and to use this flexible alkali water-soluble resin.

The hydrophobic lubricating layer according to the third anti-adhesion material of the present invention is not particularly limited as long as it is a lubricating layer containing at least a hydrophobic lubricant.

The hydrophobic lubricant is the same as the above-mentioned hydrophobic lubricant, and exhibits a lubricating effect when the support (temporary buried material) is pulled out or separated from the cured product of the hydraulic composition. Anything that can be performed is not particularly limited.

Specific examples of the hydrophobic lubricant include wax, grease, tar, asphalt, fats and oils, and the like.

The wax is chemically defined as an ester of a water-insoluble monohydric or dihydric higher alcohol and a fatty acid. Specifically, for example, a wax such as a wood wax or a cotton wax is used. Wax; animal wax such as sperm whale oil, beeswax and wool wax; liquid wax, semi-solid wax, petroleum wax, paraffin wax, montan wax, ozokerite, etc .; Although it is mentioned, it is not particularly limited. Of the waxes exemplified above, semi-solid waxes are preferred because they are more excellent in terms of lubricity, coating processability, and adhesion (adhesion) between the support and the anti-adhesion material. Furthermore, semi-solid petroleum waxes are particularly preferred.

The semi-solid wax is generally obtained by blending mineral oil, but the weight ratio of wax to mineral oil is in the range of wax: mineral oil = 40: 60 to 60:40, that is, when wax is 40%. More than 60% by weight and more than 60% by weight are particularly preferred from the viewpoints of lubricity, coating processability, and adhesion (adhesion) between the support and the anti-adhesion material. If the weight% of the wax is 40% by weight or less, the viscosity may decrease at room temperature around 30 ° C., approaching a liquid state (fluidization), weakening the adhesion, or causing a problem of liquid dripping during coating processing. Further, when the content is 60% by weight or more, in a low-temperature environment of 5 ° C. or less, the composition may become hard and may hinder the coating of the anti-adhesive material on the support, or may deteriorate the adhesion.

In addition to the mineral oil, various additives such as polybutadiene and polyethylene may be added to the wax. For example, the additive may be added in the range of 1% by weight to 20% by weight based on the total amount of the wax and the mineral oil. By the addition, properties such as improvement in adhesion can be improved.

Grease is a semi-solid lubricant obtained by mixing a fatty acid metal salt with a mineral oil. Specific examples thereof include base oils such as mineral oil, silicone oil (silicone grease), and diester oils. And a mixture obtained by mixing a thickener such as a metal soap made of a fatty acid salt such as a fatty acid calcium salt, a fatty acid sodium salt or a fatty acid lithium salt, a bentonite type, a silica gel type, a copper phthalocyanine type or an allyl urea type. The grease is not particularly limited, but has a hardness that does not fluidize at room temperature around 30 ° C. and does not hinder the coating of the anti-adhesive material on the support even in a low temperature environment of 5 ° C. or less. (Softness) is preferred.

[0159] Specific examples of tar include wood tar and coal tar. Tar is not particularly limited, but does not fluidize at room temperature around 30 ° C., and even in a low temperature environment of 5 ° C. or less,
Those having a hardness (softness) in a range that does not hinder the coating of the support with the adhesion preventing material are preferable.

Examples of the fats and oils include, for example, fatty acids such as oleic acid, lauric acid and stearic acid; derivatives such as synthetic glycerin and polyglycerin; higher alcohols such as branched higher alcohols; Linseed oil, rapeseed oil, castor oil, beef oil, lanolin, margarine, heavy oil; and the like. Oils and fats are not particularly limited, but do not fluidize at room temperature around 30 ° C. and hinder coating of the anti-adhesive material on the support even in a low temperature environment of 5 ° C. or less. Those having a range of hardness (softness) are preferred.

These lubricants may be used alone or in combination of two or more. Among the lubricants exemplified above, semi-solid waxes and greases are more preferable because they are more excellent in lubricating effect and have a low content of volatile components. Further, a semi-solid wax is particularly preferable because it can be melt-coated and has excellent durability (stability over time).

The semi-solid state has a penetration consistency of 3 to 3
In the state of 85, a preferred hydrophobic lubricant is a hydrophobic semi-solid lubricant having a compatibility of 3 to 385, more preferably 5 to 250, and still more preferably 10 to 170. . If the penetration is less than 3, the lubricity is reduced, the adhesion to the steel material is also reduced, and the material tends to fall off. Further, there is a problem that the melting takes a long time and the melt coating becomes complicated. Further, when the penetration exceeds 385, there is a problem that liquid dripping occurs and the surroundings are contaminated and the adhesive strength is reduced. In addition, the mixing consistency is JIS K2
Determined by the test method of 560.

Further, the hydrophobic lubricating layer may contain other lubricants, surfactants and the like. in this case,
For example, the pull-out property of the support (temporary buried object) can be further improved.

[0164] In addition to the above-mentioned lubricant, the hydrophobic lubricant layer may be formed, if necessary, to such an extent that the lubricity of the lubricant is not impaired. It may contain additives.

The method of forming the hydrophobic lubricating layer on the back surface of the water-absorbing lubricating layer sheet and / or on the surface of the sheet-like substrate is not particularly limited. (Molten liquid) or a dispersion (hydrophobic lubricant dispersion) obtained by dispersing a hydrophobic lubricant or the like in a dispersion medium such as an organic solvent is sprayed on the back surface of the water-absorbing lubricating layer sheet and / or the surface of the sheet-like substrate. (Spraying); a method of applying a hot melt of a hydrophobic lubricant or a dispersion of a hydrophobic lubricant using a brush or a roller; and applying a hot melt or dispersion to a water-absorbent lubricating layer sheet or sheet-like substrate. A method of impregnating a solution; Among the above methods, the method using rollers, in which the heated and melted hydrophobic lubricant is continuously applied while controlling the amount of adhesion by adjusting the clearance between the upper and lower rollers, is a method using rollers. It is particularly preferable because it is excellent in the above.

The method for preparing the dispersion when the dispersion of the hydrophobic lubricant is used is not particularly limited. In addition, specific examples of the organic solvent include, but are not particularly limited to, methyl alcohol, ethyl alcohol, isopropyl alcohol, benzene, toluene, acetone, methyl ethyl ketone, ethyl acetate, and butyl acetate. .

The thickness of the lubricant layer is from 1 μm to 10,000
The range of 0 μm is preferred, and 10 μm to 5,000 μm
Is more preferable, and 100 μm to 2,000 μm
Is more preferably in the range of 300 μm to 1,000 μm.
The range of m is particularly preferred. If the film thickness is less than 10 μm, the separability and lubricity between the cured product of the hydraulic composition and the support are reduced, and the adhesion of the anti-adhesion material to the support is also undesirably reduced. On the other hand, when the film thickness exceeds 10,000 μm, the weight and bulk of the obtained anti-adhesion material are increased, and the handling property and the workability during production are undesirably reduced.

The hydrophobic lubricating layer according to the present invention comprises: i) the back surface (the surface to which the water-absorbing resin is not attached) and / or the front surface (the surface to which the water-absorbing resin is attached) of the water-absorbing lubricating layer; ii) It is formed by coating or the like on at least one surface selected from the group consisting of the surface and / or back surface of the same substrate as the above-mentioned sheet-like substrate and iii) the surface of the support.

Among them, for example, the anti-adhesive property between the support (temporary buried material) and the hydraulic composition (easiness of pulling out work)
The hydrophobic lubricating layer is formed on the back surface of the water-absorbing lubricating layer sheet (the surface to which the water-absorbing resin is not attached) in consideration of the workability, productivity of the coating process, and economics (work costs). It is more preferable to make it possible.

The amount of the hydrophobic lubricant adhering to the water-absorbent lubricating layer sheet, sheet-like substrate or support (temporary buried material), that is, the amount of the lubricating agent per unit area is determined by the water-absorbing lubricating layer sheet, It may be set according to the state of the surface of the sheet-like base material, the surface of the support (temporary embedding material) (irregularities and the like), the composition and combination of the two, the working environment, and the like. from the viewpoint of satisfying both the sex and the adhesion, preferably in a range of ^{1g / m 2 ~10,000g / m 2} , more preferably in the range of ^{10g / m 2 ~5,000g / m 2} , 100g / m ² ~2,000g
/ M ² is more preferable, and 300 g / m ² to
Particularly preferred is a range of 1,000 g / m ² .

The ratio of the lubricant to 100 parts by weight of the sheet-like base material is more preferably in the range of 1 part by weight to 10,000 parts by weight from the viewpoint of satisfying both the coating processability and the adhesiveness. And more preferably in the range of 10 to 2,000 parts by weight, particularly preferably in the range of 20 to 1,000 parts by weight.

The third anti-adhesion material of the present invention is, as described above, i) formed by applying a hydrophobic lubricant serving as a hydrophobic lubricating layer to at least one surface of a water-absorbing lubricating layer sheet serving as a water-absorbing lubricating layer. Ii) a composite of a hydrophobic lubricating layer sheet in which a hydrophobic lubricant is formed on at least one surface of a sheet-like substrate and a water-absorbing lubricating layer sheet; iii) hydrophobic lubrication directly on the support surface Preferred examples include those in which an agent and a water-absorbing lubricating layer sheet are alternately laminated.

However, 1) anti-adhesion property between the hydraulic composition and the support (pull-out / separation property, safety, adherence to the support), 2) simplification of the work of coating and embedding the support, 3) Manufacturing processability of the anti-adhesive material, 4) As a result of considering the economic efficiency, etc., the anti-adhesive material in which a hydrophobic lubricant is formed on the back surface of the water-absorbent lubricating layer sheet on which the water-absorbent resin is not attached is particularly preferable. preferable.

When coating the support (temporary buried material) with the anti-adhesion material (covering material), it is necessary to use one anti-adhesion material (covering material) for one support (temporary buried material). Although desirable, two or more anti-adhesives (coatings) can be used for one support (temporary buried material) as needed. Therefore, as a method of coating the support (temporary buried material) with the adhesion preventing material (covering material), for example, the support (temporary burying material) is coated with two sheets of the adhesion preventing material (covering material) formed in a sheet shape. It is also possible to adopt a method of sticking.

In the present invention, the term "coating" does not necessarily mean that the support (temporary buried object) is covered with a covering material so that the support (temporary buried object) cannot be seen. This shows that the support (temporary buried material) is covered with an adhesion preventing material (coating material) to such an extent that it can be easily pulled out from the cured product of the above, that is, to such an extent that the adhesion between them can be suppressed.

As a method of coating the support (temporary buried material) with an anti-adhesion material (coating material), specifically, for example, an anti-adhesion material (coating material) formed into a bag or a tube by sewing or the like is used. To cover the lower part of the support (temporary buried object) by lifting it from the lower part of the support body (temporary buried object); Method: A method of wrapping a support (temporary buried material) with an anti-adhesive material (covering material) formed in a sheet form; A method of fixing using a fixing jig or the like; a sheet-shaped anti-adhesion material is attached by utilizing the adhesion (adhesion) of the mixture layer containing the hydrophobic lubricant of the anti-adhesion material (coating material). Method: Method of applying the above mixture directly to the surface of a support; Adhesion A method of attaching a sheet-like anti-adhesive material using the adhesion (adhesiveness) of a hydrophobic lubricating layer of a stopper (coating material); applying a hydrophobic lubricant directly to the surface of a support; After forming a hydrophobic lubricating layer by laminating a hydrophobic lubricating layer sheet, a liquid composition containing a water-absorbing agent such as a water-absorbing resin and a bonding agent such as an alkaline water-soluble resin or natural rubber is applied to the hydrophobic lubricating layer. A method of forming a water-absorbing lubricating layer by coating from above or bonding a water-absorbing lubricating layer sheet onto a hydrophobic lubricating layer; a liquid composition containing a water-absorbing agent and a bonding agent directly on the surface of a support After forming a water-absorbing lubricating layer by applying an object or laminating a water-absorbing lubricating layer sheet, applying a hydrophobic lubricant from above the water-absorbing lubricating layer, For pasting together Ri can be adopted a method in which to form a hydrophobic lubricating layer, but is not particularly limited.

When the support (temporary buried material) is covered with the anti-adhesion material (covering material), the anti-adhesion material (covering material) is coated so as to conform to the shape of the support (temporary buried material). More preferably. As a result, the positioning accuracy (implantation accuracy) when embedding (embedding) the covered support body
Is more improved. For example, a mixture in which an anti-adhesive material (covering material) formed in a bag shape or a tubular shape is hung from the lower end of the support (temporary buried material) and lifted, and formed on the inner surface of the anti-adhesive material bag or tube. A method of adhering an anti-adhesion material along the shape of a support utilizing the adhesion (adhesion) of a hydrophobic lubricant in a layer, or an anti-adhesion material (coating material) formed in a bag-like or cylindrical shape Is hung from the lower end of the support (temporary buried object) and lifted up, using the adhesion (adhesion) of the hydrophobic lubricating layer formed on the inner surface of the bag or cylinder of the anti-adhesive material to form the support The method in which the anti-adhesion material is closely adhered along the line is preferable from the viewpoint of performing the operation more easily and accurately.

In this method, as a specific example, a mixture of a water-absorbent resin and an adhesive semi-solid lubricant (grease-like wax) or an adhesive semi-solid A bag-shaped or cylindrical anti-adhesive material coated with only a lubricant is put on (the procedure for putting on socks), and the anti-adhesive material is lifted up to cover the entire support, and then the support is once laid down. A more preferable method is a method in which the adhesion preventing material is adhered to the surface of the support using the adhesion (adhesion) of the hydrophobic lubricant component by using an automatic or manual roller or stepping on the foot. As a method of bringing the anti-adhesion material into close contact with the surface of the support, a method of rubbing the sole of the foot (stepping on) or the inside surface or outside surface of the foot is particularly preferable from the viewpoint of workability.

Further, with the support suspended, the adhesion preventing material may be brought into close contact with an automatic or manual dedicated roller jig.

It is also preferable that the anti-adhesion material be brought into close contact with the supporting member by hand work at the same time as the erection, or by using an automatic or manual dedicated roller jig.

Instead of artificially contacting with a roller or the like, it is also possible to adhere naturally by the hydraulic pressure of the hydraulic composition at the time of building or the like.

Incidentally, as a method of forming the adhesion preventing material (coating material) in a bag shape or a cylindrical shape, specifically, for example,
A method of bonding the ends together using an adhesive; a method of fusing the ends by heat sealing; a method of sewing the ends together; a method of binding with a wire or a string, etc. Can be adopted. Although not particularly limited as described above, a sewing process of sewing is particularly preferable from the viewpoint of the strength of the product.

As a preferred embodiment of the anti-adhesion material of the present invention, as described above, a sheet-like base material having a mixture layer containing a water-absorbing agent and a hydrophobic lubricant formed on the front or back surface of the sheet-like base material is provided. An anti-adhesion material in which a hydrophobic lubricant is formed on the back surface of the water-absorbent lubricating layer sheet to which the water-absorbent resin is not attached. (FIG. 5) From the viewpoint of adhesion and anti-adhesion properties, the mixture layer is preferably formed on a surface to which the water resistance imparting agent is not adhered by coating or the like.

Also, three layers of the anti-adhesive material (sheet-like substrate or water-absorbing lubricating layer /
The above-mentioned mixture layer or hydrophobic lubricating layer / sheet-like substrate or water-absorbing lubricating layer) is a particularly preferred embodiment (FIG. 6). In the anti-adhesive material product in which the mixture layer is simply formed on the back surface, since the hydrophobic lubricant component of the mixture layer and the tackiness (tackiness) of the hydrophobic lubrication layer become a problem during production, storage, transportation, and work, Cover paper such as release paper is required. On the other hand, the anti-adhesion material having the back surfaces can eliminate the need for the release paper, and can reduce disposal processing of the release paper on site. Further, when the anti-adhesion material is processed into a bag shape or a tubular shape, the above mixture is formed on the front surface or the back surface of the sheet substrate by coating or the like, and another sheet substrate is overlapped on the mixture layer at the same time. The above-described three-layer sheet in which the mixture layer containing the water-absorbing agent and the hydrophobic lubricant was formed between the two sheet-like base materials produced, because the two sheet-like base materials were previously laminated. Of the two steps, the alignment step and the sewing step, the alignment step can be omitted, so that the productivity can be improved.
Further, in the method of manufacturing (working) a sheet-like anti-adhesive material for forming the above-mentioned mixture layer on a sheet-like substrate,
When applying a mixture containing a water-absorbing agent and a hydrophobic lubricant such as semi-solid wax to the front or back surface of a sheet-like base material, attach the front or back surface of another sheet-like base material simultaneously with the application processing. In the processing method of combining, or in the method of manufacturing (processing) an anti-adhesion material that combines a water-absorbing lubricating layer and a hydrophobic lubricating layer, for example, a water-absorbing lubricating layer sheet having a water-absorbing resin adhered to the surface of a base material is used. When applying a hydrophobic lubricating layer such as a semi-solid wax on the back surface, a processing method of bonding the back surface of another water-absorbing lubricating layer sheet simultaneously with the applying process is a coating process and a bonding process. This is particularly preferable because the productivity can be improved by shortening the steps.

The time when the support (temporary buried material) is covered with the adhesion preventing material (coating material) is not particularly limited.
It may be an appropriate time before carrying the support (temporary buried object) to the work site, or may be an appropriate time while storing the support (temporary buried object) at the work site. Alternatively, it may be an appropriate time until the operation of contacting (embedding) the support (temporary embedding material) with the hydraulic composition (embedding). That is, the support (temporary buried material) only needs to be covered with the anti-adhesion material (coating material) at the time of contact (embedment) with the hydraulic composition.

When a bag-shaped or cylindrical anti-adhesion material (coating material) is used, the anti-adhesion material (coating material) is used at the time of contact (embedment) with the hydraulic composition. , As long as they are formed in these shapes.

A support (temporary buried material) covered with a water-resistant anti-adhesion material (covering material) can be piled up at a work site, so that it is preferable because it does not require much labor for storage.

Further, at the work site, for example, a hydrophobic lubricant layer is previously formed on the surface of the support (temporary buried object), and the water-absorbing lubricating layer is formed immediately before construction by utilizing the adhesive force of the hydrophobic lubricant. You can also attach a sheet. In other words, the work can be simplified and streamlined as appropriate according to the situation at the work site, so that the work can be performed quickly.

When an anti-adhesion material that exposes the mixture layer or the hydrophobic lubricating layer without bonding the surfaces of the mixture layer or the hydrophobic lubricating layer is used, the mixture layer or the hydrophobic lubricating layer is sticky. If necessary, paper or a film can be laminated as a coating on the surface of the mixture layer or the hydrophobic lubricating layer in order to prevent adhesion to other substances. Specific examples of the paper and film include a release paper coated with a release agent, a thermoplastic resin such as polyethylene, polypropylene, or polyvinyl chloride; a regenerated cellulose such as cellophane; and the like. However, any film may be used as long as it does not inhibit the lubricity of the lubricant, and is not particularly limited.

As a method of covering the support (temporary buried material) with a sheet-like anti-adhesion material (covering material), more specifically, for example, as shown in FIG. The support (temporary buried object) 2 is lifted, and a string 3 passed through a pulley 5 provided at the tip of the crane 6 is attached to an anti-adhesion material (coating material) 1. After the formed anti-adhesion material (covering material) 1 is inserted into the support (temporary buried object) 2 so that the worker 4 can pull on the string 3 to put it on from below, for example, FIG. As shown in (1), a method in which the worker 4 further pulls the cord 3 to pull up and coat and fix the anti-adhesion material (covering material 1), or is provided on a crane truck instead of the worker, for example. Another crane (parent hook) or winch How to raise the machine up Ri,
In addition, pulleys and ropes are not used. For example, a method in which an anti-adhesive material is directly attached to a hook of a lifting machine such as another crane (parent hook) equipped in a crane truck and the machine is directly pulled up; a bag or a tube After inserting the anti-adhesive material (covering material) formed in a shape into the support (temporary buried object) so as to cover it from above and fixing the upper end, the support (temporary buried object) is lifted using a crane, Then, for example, an operator pulls the string attached to the lower end portion of the anti-adhesion material (covering material), whereby the anti-adhesion material (covering material) is pulled.
A method of coating by pulling down; placing an anti-adhesive material (coating material) formed in a bag or a tube on the ground or the like, and then inserting a support (temporary buried object) into the anti-adhesive material (coating material) Then, an anti-adhesive material (covering material) is pulled up to cover and fix; a support (temporary buried object) is placed on the ground or the like, and then the support (temporary buried object) is bagged or cylindrically shaped. A method of inserting the anti-adhesive material (covering material) formed in the above, then lifting up the support (temporary buried material), and pulling up the anti-adhesive material (covering material) to cover and fix it; FIG. After the support (temporary buried material) 2 is placed on the anti-adhesive material (covering material) 10 formed in a sheet shape by using the crane 6 or the like, as shown in FIGS. As shown, the support (temporary buried material) 2 is wrapped with the anti-adhesion material (covering material) 10 and then, if necessary, As shown in (d), a method of fixing an anti-adhesion material (coating material) 10 using a fixing jig 11; a support (temporary buried object) between the anti-adhesion material (coating material) folded in a bellows shape To fix both ends of the anti-adhesive material (covering material) to the upper and lower parts of the support (temporary buried object); to prevent adhesion to the upper and lower parts of the support (temporary buried object) A method of fixing both ends of a material (covering material) and fixing a central portion of the anti-adhesion material (covering material) using a wire (number wire), a string, a belt, a gum tape, etc .; a support (temporary buried material) A method of fixing a part of the covering material on the top of the substrate and hanging the remaining part of the adhesion preventing material (the covering material) along the support (temporary buried object); A method of attaching an inhibitor, preferably a sheet-like substrate or a water-absorbing lubricating layer / the above mixture How pasting objects layer or a hydrophobic lubricant layer / base material sheet or adhesion prevention material composed of three layers of water-absorbing lubricating layer; it may be employed such as, but is not particularly limited.

Among the above exemplified methods, a method in which an anti-adhesion material (covering material) formed in a bag shape or a tubular shape is lifted so as to be worn from below, and the support (temporary buried material) is covered (inserted). And a method of wrapping the support (temporary buried material) with an anti-adhesive material (coating material) formed in a sheet shape,
More preferred. Above all, the workability of the covering work is excellent in that the bag-like or tubular anti-adhesive material (covering material) is lifted up so as to be worn from below, and the support (temporary buried material) is covered (inserted). Is more preferable. Also, in this lifting and covering work, pulleys and ropes are not used. For example, a hanging string (handle) of an anti-adhesive material is directly attached to a hook of a lifting machine such as another crane (parent hook) equipped on a crane truck. The method of directly hoisting the machine by connecting them is particularly preferable since the work time can be further shortened because the lifting labor (manual work) can be reduced, and the pulley and rope preparation and installation work can be omitted.

However, if there is no space for lifting the support or if there is a private house nearby and the lifting covering cannot be performed, or if the length of the support to be removed is limited, the support (temporary) must be used. The method of sticking an anti-adhesion material to an embedded object) is most preferable. For example, it is composed of three layers: a sheet-like substrate or a water-absorbing lubricating layer sheet / a mixture layer containing a water-absorbing agent and a semi-solid lubricant or only a semi-solid lubricant layer / a sheet-like substrate or a water-absorbing lubricating layer sheet. In particular, a method in which the two sheet-like base materials or the water-absorbing lubricating layer sheets of the anti-adhesion material are adhered to the surface of the support by using the adhesiveness of the semi-solid lubricant component while being peeled off. preferable. For example, it is optimal to apply and cover by the following operation procedure. 1. H-section steel on the sleeper so that the web (groove) faces up
("H" shape) The two cloths (sheet-like base material or water-absorbent lubricating layer sheet) overlapping the end portions of the sheet roll of the anti-adhesive material are
Peel off about 3 cm. 3. Place the anti-adhesive sheet roll on top of the H-section steel with the adhesive (adhesion) agent side of the peeled cloth down. An operator holds the peeled end of the cloth by holding it.

Further, the peeled cloth may be slightly broken (about 3 cm) at the corners of the left and right H steel flanges, and the cloth may be hooked on the corners of the H steel flange to fix the ends. 5. 5. Another worker pulls another peeled cloth along H steel. 6. By pulling the cloth as described above, the two cloths that are in close contact with each other are peeled off and cover the H steel. 7. After covering the H-section steel, arrange the cloth so that the center line of the cloth overlaps the center line of the H-section steel. Step on the center line of the cloth with your foot and attach the cloth to the surface of the H-section steel web (stepping on the web) 9. 9. Step on the cloth at the corner of the H-section steel web with your feet so that the air does not block. 10. Rub the cloth on the inside of the H-section steel flange on the outside surface of the foot and attach it (foot rubbing adhesion). 11. Press the cloth on the outside of the H-section steel flange by hand so as not to catch the air, or rub it with the inside of the foot or the sole of the foot. 12. Turn the H-beam over using a clamp or wire rope. 13. Attach the anti-adhesion sheet to the inverted H-shaped steel in the same manner as above (double-sided coating) If necessary, cut the excess cloth at the end of the H-section steel appropriately (2 places), fold it inside the H-section steel web and flange, and fix it with a metal fixture (binder clip, etc.) 13. When sticking to the connection support Work is unnecessary. * If necessary, after the above work, further wrap it with fasteners such as binder clip, gum tape, vinyl tape, rope,
Stap the whole edge of the cloth with a stapler or the like to reinforce the application.

The above anti-adhesion material sheet roll has a required length (eg, (of the length of the support (H-section steel)) from a long (for example, about 50 m) anti-adhesion material sheet roll on site.
May be used, and this anti-adhesive material sheet may be wound again into a roll shape, or an anti-adhesive material sheet roll previously wound to a predetermined length may be used.

When the anti-adhesion material is attached to the support as described above, it is shorter in time to perform the method by the above-mentioned stepping adhesion or the rubbing adhesion performed by the foot than by sticking while bending down by hand. It is particularly preferable because it can be attached with light labor.

After the adhesion preventing material is attached, the end (overlapping portion) of the adhesion preventing material can be closed by handy sewing, stapling, putty coating, adhesive coating, paint coating or the like. It is preferable because the prevention material is hardly peeled off. In addition, after applying the anti-adhesive material, it is possible to prevent the tape from being wrapped with a tape, such as vinyl tape or gum tape, a rope, or to fit a square or a plywood board into the shape of the support to prevent adhesion. It is more preferable because the peeling of the material can be completely prevented. For example, after coating an H-section steel with an anti-adhesion material,
A method of fitting a thin plywood cut into the same length as the width between the flanges of the H-section steel on the web (groove portion) of the section steel may be used. According to this method, the adhesion preventing material is physically and firmly fixed to the surface of the support.

In addition, as compared with the case where a conventional anti-adhesion material is applied to the surface of a support, the method of attaching the anti-adhesion material of the present invention is a simple and highly workable method.

The method of fixing the adhesion preventing material (coating material) to the support (temporary buried material) is not particularly limited.

The fixing jig 11 specifically has, for example, a notch in the length direction of a clip such as a laundry pinch, a metal binder clip or the like, or a tube or hose such as a rubber hose or a foamed heat insulating material. Binder (pinch), wire (number line), string, belt, gum tape, cut (paper) cup, handy sewing machine (sewing),
Stapler needles (staples), putties, adhesives, paints and the like are not particularly limited, but from the viewpoint of simplicity of operation, a tube such as a rubber hose or a heat insulating foam is used.
Binders (sandwiches) with cuts in the length direction of hoses are preferable, and among them, tube-shaped foamed heat insulating materials (heat insulating materials) with cuts in the length direction are particularly preferable. This foamed heat insulating material (heat insulating material) not only functions to fix the anti-adhesion material, but also when the anti-adhesion material is coated on the support (temporary buried material) or when the anti-adhesion material comes into contact with the hydraulic composition (when embedded). )
Another function is to prevent the anti-adhesion material from being damaged at sharp corners of the support (temporary buried object) due to the cushioning properties of the foamed heat insulating material. Therefore, it is particularly preferable to fix with a foam heat insulating material (heat insulating material). In addition, the attachment position of the foam insulation material (heat insulation material) may be partial, for example, it may be attached only to the lower corner of the suspended support immediately before covering the tubular anti-adhesion material. It is particularly preferable from the viewpoint of workability and economy.

Further, an auxiliary binder (sandwich) for more firmly fixing the attached foam insulation material (heat insulation material) can be further sandwiched from above the foam insulation material, so that the foam insulation material can be prevented from falling off during construction. Particularly preferred.

Further, there is a method in which a bag-like or cylindrical sheet-like material covering the whole or a part of the support is further fixed on the support coated with the adhesion preventing material. In this method, the bag-like or cylindrical sheet-like material may be the water-absorbing lubricating layer sheet or the anti-adhesion material of the present invention. In this case, the anti-adhesion performance can be further improved.

Regarding the method of preventing the above-mentioned breakage at the time of coating the support (temporary buried object) with the anti-adhesive material, in addition to the above-mentioned method using the foamed heat insulating material, a large cap having a smooth curve is used. For example, a method of covering the entire bottom of the suspended H-shaped steel or a method of similarly covering with a paperback may be used. This smooth curved cap is also a preferred breakage prevention material. The cap having such a smooth curve may have, for example, a size that covers the entire corner of the bottom of the suspended H-section steel (support), a strength that can withstand the resistance during coating, and a shape that does not catch.

An embodiment of the anti-adhesion material of the present invention (coating material: forming a mixture layer containing a water absorbing agent and a hydrophobic lubricant or a hydrophobic lubricating layer on the inner surface) processed in a bag shape is shown in FIG. As shown in FIG. In FIG. 3, when the tip cover 14 as a second reinforcing member is attached to the bottom of the bag-shaped anti-adhesion material 21, the structure of the bottom of the bag (the anti-adhesion material 21) can be further strengthened. Become. The tip cover 14 is preferably sewn together with the reinforcing band to the adhesion preventing material 21. In addition, as shown in FIG. 3, the upper end of the distal end cover 14 can be fixed to the adhesion preventing member 21 with an adhesive stopper 14a. This tip cover 14
The material is not particularly limited, and the same material as the material used for the above-mentioned sheet-like substrate can be suitably used.

In order to process the bag or the tube as described above, it is preferable to stitch the periphery of the bag or the tube. At this time, it is preferable that the periphery of the bag or the tube is reinforced by a reinforcing band. For example, as shown in FIG. 3, a belt-like reinforcing band 15 having a predetermined width w0 is sewn around four sides of an anti-adhesion material 21 processed into a rectangular bag shape, and the bottom portion is also reinforced. The reinforcing band 15a is sewn together to reinforce the bag (adhesion preventing material 2).
The shape of 1) can be further stabilized.

As another type, an anti-adhesion material 21
The bottom portion (the portion of the reinforcing band 15a) is not sewn, and the reinforcing band 15a and the tip cover 14 are also removed. The cylindrical anti-adhesion material prevents adhesion by the adhesion effect of the mixture layer or the hydrophobic lubricating layer. It is more preferable because the adhesion of the material to the support can be made more complete and the sewing process can be simplified.

The material of the reinforcing bands 15 and 15a and the size of the width w0 are not particularly limited. For example, in the present embodiment, as the reinforcing belts 15 and 15a, a polyester belt of w0 = 2.5 cm or 5
cm polypropylene belt. The reinforcing strips 15 and 15a are made of a bag or a tube (adhesion preventing material 2).
It is preferable to sew along the periphery of 1), but the position of the seam allowance at this time is not particularly limited. It is located in.

The end of the reinforcing band 15 on the opening side of the bag (adhesion preventing material 21) can be formed as a suspension string 16 in an extended state. The length l0 of the hanging string 16 is not particularly limited, and for example, in the present embodiment, the length l0 is about 1 m. The hanging string 16 can be used for hanging or lifting the bag when covering the support (temporary buried object).

It is preferable that the end of the hanging string 16 is also reinforced as a folded structure. For example,
In the present embodiment, it is preferable that the length of the folded portion is about 10 cm and sewing is performed because the structure of the end of the hanging string 16 can be strengthened.

As shown in FIG. 3, a lace 17 can be provided at the opening of the anti-adhesion material 21 formed into a bag or cylindrical shape. By tying the opening with the strap 17, the bag (anti-adhesion material 21) can be stably attached to the support (temporary buried object). In the same manner, tie a string on the bottom of the folded bag.
7 can be provided. Thus, the bag can be more stably coated on the support (temporary buried object).

[0210] Of the above-described tying cords 17, those provided in the opening are arranged along the reinforcing band 15 of the opening, for example, as shown in FIG. That is, the binding string 17 is positioned so as to be orthogonal to the longitudinal direction in the rectangular bag.

[0211] On the other hand, of the above-described tying cords 17, the one provided at the bottom portion is positioned so as to be orthogonal to the longitudinal direction of the rectangular bag, like the one provided at the opening. . Here, a plurality of straps 17 provided at the bottom may be provided as shown in FIG. 3 (in the present embodiment, two as shown in FIG. 3). If a plurality of the laces 17 are provided in this manner, the state in which the bag (the anti-adhesion material 21) is covered with the support (temporary buried material) can be further stabilized.

The tie 17 at the bottom is to be disposed on the above-mentioned distal end cover 14.
Is not particularly limited as long as the bottom of the bag can be stably covered with the end of the support (temporary buried object). For example, as shown in FIG.
When the tip cover 14 has a shape having a length of H = 3 m in the longitudinal direction, 1 h is set at a position of h = 1 m from the bottom.
Arrange the tying string 17 at the position 2m from the bottom,
That is, there is a method of disposing the second lace 17 at a position h = 1 m away from the first lace 17.

[0213] At this time, the configuration in which each lace 17 is provided in the bag is not particularly limited. For example, in the present embodiment, a configuration is provided in which a plurality of laces are provided in the reinforcing band 15 provided along the circumference in the longitudinal direction of the bag (the adhesion preventing material 21).

The length of the binding string 17 is not particularly limited as long as it can bind the anti-adhesion material 21 covered with the support (temporary buried object). In order to tie the strap, it is preferable that both ends of the strap 17 have a length of about 30 cm in a state where the strap is passed through the bag and provided in the bag.

For example, in the present embodiment, the width W of the anti-adhesion material 21 is 1.4 m.
Has an inner diameter width K of 1.3 m or more. At this time, since the binding string 17 must be long enough to bind the anti-adhesion material 21, both ends are 30
It preferably has a length of about cm.

[0216] The material of the binding string 17 is not particularly limited. Just fine. In the present embodiment, as the binding string 17, a round string that is usually used is used.

It is preferable to use the above-mentioned laces if necessary, but it is preferable to use a mixture layer containing a water-absorbing agent and a hydrophobic lubricant formed on the inner surface of the bag (sheet-like anti-adhesive material). If the anti-adhesion material can be stably adhered (coated) to the support by the adhesion force of the hydrophobic lubricant, it is better to use no laces from the viewpoint of simplification of sewing work (productivity). preferable.

When the anti-adhesion material according to the present invention is coated on a support (temporary buried object), the lower end of the support (temporary buried object) such as an H-section steel is subjected to adhesion prevention. It is preferable to use a covering method of mounting a mounting device for preventing material damage (hereinafter referred to as a mounting device). This wearing tool is provided with a material exhibiting at least a buffer effect, that is, a buffer material.

If this mounting device is mounted on the lower end of the support (temporary buried object), when the support (temporary buried object) is further covered with the anti-adhesion material, the mounting device is used. The anti-adhesion material does not get caught on the end of the support (temporary buried object) due to the buffer effect, and the anti-adhesion material is not damaged. Therefore, the effect of the adhesion preventing material, that is, the effect of easily pulling out (separating) the support (temporary buried object) can be further improved.

Further, when a support (temporary buried material) coated with an anti-adhesion material without the above-mentioned mounting device is driven into, for example, an excavation hole filled with soil cement, the bottom of the anti-adhesion material is Is very easily damaged. That is, in the above case, the lower end of the support (temporary buried object) and the bottom of the anti-adhesion material come into intense contact with each other due to the weight of the support (temporary buried object), the pressure of soil cement, and the like. Because the end of the support (temporary buried object) made of hard metal is exposed, the effect of this end and the weight and pressure
The anti-adhesion material is more easily broken.

However, if the above mounting device is mounted on the lower end of the support (temporary buried object), the lower end of the support (temporary buried object) is not exposed. Also,
The weight per unit area applied to the lower end of the support (temporary buried object) and the pressure from soil cement can be reduced. Therefore, breakage of the anti-adhesion material at the time of embedding (implanting) into the excavation hole can be more effectively suppressed. Therefore, the effect of the adhesion preventing material can be further improved.

[0220] The shape of the above-mentioned mounting device is a support (temporary buried object).
That the lower end of the support is not exposed, and that it serves as a cushioning material when provided between the lower end of the support (temporary buried object) and the anti-adhesion material. There is no particular limitation as long as it is possible. However, it is particularly preferable that the mounting tool be shaped so that it can be mounted by fitting it into the end of a support (temporary buried object).

For example, in the present embodiment, FIG.
As shown in FIG. 5, a mounting device 18 having a cylindrical shape made of at least a foam and further having a cut portion 18a is used. As shown in FIG. 4B, the mounting tool 18 can be mounted simply by inserting the cutout 18a into the end of the H-shaped steel as the support 22. Therefore, the mounting of the mounting tool 18 is very easy, and the operation of driving the support (temporary buried object) 22 into the excavation hole is not complicated.

[0224] In the mounting of the above-mentioned mounting device, unless mounting is complicated or a special facility is required for mounting, which leads to an increase in cost, other than mounting by mounting. Various methods may be used. The material of the wearing device is not particularly limited as long as it is a material (cushioning material) capable of providing a buffer effect. For example, nonwoven fabrics such as split-fiber nonwoven fabric, carpet, felt, and stitch-bonded nonwoven fabric; flat yarn fiber fabric, cotton fabric, hemp fabric, synthetic resin fabric such as polypropylene; polystyrene, polyethylene, polypropylene, vinyl chloride resin, Foams obtained by forming closed cells or open cells in urethane resin, phenol resin, rubber foam, etc .; urethane rubber, silicone rubber, fluorine rubber, ether rubber, acrylic rubber, butyl rubber, neoprene (chloroprene rubber), butanediene- Elastomers such as acrylonitrile copolymer and natural rubber; and natural products such as leather, wood, paper, and cardboard. When the support (H-section steel) is installed, it is preferable to use an installation guide with a roller (ruler) from the viewpoint of improving the installation accuracy. Furthermore, the use of a built-in guide with a roller (ruler) is particularly preferred to prevent breakage of the anti-adhesion material of the present invention. The setting guide (ruler) with a roller is, for example, H
Examples thereof include those formed by welding and fixing a channel square member or a single pipe to which a roller for suppressing the abdomen and the edge of the flange of the section steel or the abdomen of the flange and the web surface is attached. With this roller, the adhesion preventing material coated on the support can be prevented from being damaged even if it comes into contact with the guide. This guide is set on two fixing H-section steels (bases) which are arranged in parallel with a drill hole interposed therebetween.

The anti-adhesion material of the present invention comprises, for example, a sheet-like substrate layer or a water-absorbing lubricating layer, a mixture layer containing a water-absorbing agent and a hydrophobic lubricant or a hydrophobic lubricating layer as shown in FIG. Be composed.

As another sheet-like anti-adhesion material of the present invention, a sheet-like base material layer or a water-absorbing lubricating layer, a mixture layer containing a water-absorbing agent and a hydrophobic lubricant or a hydrophobic lubricating layer are laminated. For example, as shown in FIG. 6, a mixture layer or a hydrophobic lubricating layer containing a water absorbing agent and a hydrophobic lubricant was sandwiched between two sheet-shaped base layers or a water absorbing lubricating layer as shown in FIG. It is of a configuration.

As described above, in the case where the anti-adhesion material of the present invention is applied, even if it is damaged by an external force such as an impact force or a tensile force generated when a support (temporary buried object) is buried, it may be damaged. Due to the effect of the hydrophobic lubricant component of the mixture layer or the adhesion of the hydrophobic lubricating layer (flexible tackiness such as re-peeling), the anti-adhesive does not release from the support surface and is partially damaged. And the separation between the support and the cured product of the hydraulic composition can be extremely facilitated.

The hydrophobic lubricant component or the hydrophobic lubricating layer in the above-mentioned mixture exerts its original lubricating effect, and has a very high lubricating property of the water absorbing agent and the water absorbing gel, as well as the separation between the support and the hydraulic composition. To facilitate.

When the support (temporary embedded material) is pulled out from the cured product of the hydraulic composition, the frictional resistance can be greatly reduced. That is, the labor (tensile force) in the pull-out operation can be reduced, and the workability of the operation can be improved. The recovered support (temporary buried material) can be reused as it is.

In the above description, an example was given of the separation of the support (temporary buried material) and the cured product of the hydraulic composition. However, the anti-adhesion material (coating material) of the present invention is Supports buried in soil without composition (temporary buried objects)
It can also be applied to In other words, it is possible to reduce the frictional resistance when the support (temporary buried object) is pulled out of the soil by absorbing groundwater or the like, and the support (temporary buried object)
Can be easily pulled out.

Further, from the characteristics (performance, action, and effect) of the anti-adhesion material described above, the anti-adhesion material of the present invention can be used as a temporary embedded material such as H-section steel for steel retaining wall or steel sheet pile and soil cement. It is the most suitable material for preventing adhesion to a hardened cement composition such as. For example, by coating an H-section steel buried in soil cement milk in an excavation hole with the anti-adhesion material of the present invention, the H-section steel can be pulled out and collected from the retaining wall (cured soil cement). Can be performed very easily and safely. Since the H-shaped steel after finishing the role as the core material of the retaining wall can be easily pulled out and removed,
It facilitates secondary construction without hindering subsequent secondary construction. The retaining wall is used for foundation (base) construction of buildings, dams, stations, etc., chimney construction, foundation or pier construction of expressways and railways, underground development construction, subway construction, tunnel construction, sewer construction, etc. It will be constructed by mid-line work, box culvert installation work, cast-in-place box culvert installation work, and shaft construction such as a shaft (hole) where a shield machine starts.

Further, based on the characteristics (performance, action, and effect) of the anti-adhesion material described above, the anti-adhesion material of the present invention can be used to remove water and cement, etc., from the soil (muddy soil) generated at the construction site. It is an optimal material to prevent adhesion between fluidized soil prepared by mixing a solidified material and temporary buried objects such as steel sheet piles. For example, when installing a ready-made or cast-in-place box culvert underground that passes through lifelines such as water pipes, sewer pipes, electric lines, telephone lines, cable lines, and gas pipes, steel sheet piles and box culverts for retaining walls are installed. Before pouring the fluidized soil into the backfilling point between the backfill and by covering the surface of the steel sheet pile in contact with the fluidized soil by the adhesion prevention material of the present invention or the like, after backfill hardening The steel sheet pile can be pulled out of the ground very easily and safely.

Furthermore, based on the characteristics (performance, action, and effect) of the anti-adhesion material described above, the anti-adhesion material of the present invention can be used for buildings, dams, stations, and other buildings, chimneys, piers, foundations (bases). It is most suitable as a mold release material for formwork used when constructing concrete structures such as construction, underground shopping malls, subways, tunnels, sewers, box culverts, and precast structures. The adhesion between the cured structure of the hydraulic composition and the mold is prevented. Above all, it is more preferably used for a formwork or a shield method in which the surface is slid and released.

Further, from the characteristics (performance, action, and effect) of the anti-adhesion material described above, the anti-adhesion material of the present invention can be used as a low-strength concrete (hydraulic composition) for pile heads of foundation embedded piles or cast-in-place piles. ) Is most suitable as a separating material for removing). This prevents adhesion between the pile and the hydraulic composition. For example, by arranging the anti-adhesive material of the present invention on the inner surface of a hollow pile or the surface of a reinforcing bar (rebar) by hardening the hydraulic composition with the inner surface of the hollow pile or the surface of the reinforcing bar (rebar). Adhesion with structures can be prevented. Further, Japanese Patent Laid-Open No. 10-18400
No. 3, the plug body for removing poor-strength concrete at the pile head is provided with the anti-adhesive material of the present invention by sticking or the like, so that the plug body is hardened after the concrete at the pile head is hardened. Can be more easily pulled out, making removal of poor strength concrete easier. Further, by disposing the anti-adhesive material of the present invention on the surface of the plug for forming the voids as described in JP-A-10-184002, the concrete (hydraulic composition) ) Can further facilitate the removal of the plug body embedded therein, and the gap can be formed more easily.

Further, the composition of the present invention is a material most suitable for water stoppage and prevention of water leakage.

In particular, the anti-adhesion material containing the mixture of the present invention has a volume expansion property due to water absorption due to the properties of a water-absorbing resin, and has hydrophobicity or water repellency due to the properties of a hydrophobic lubricant. Watertightness and leakage prevention at joints, gaps or cracks in the ground, rock, concrete, etc. are surely realized. In particular, the anti-adhesion material of the present invention, which is a mixture containing a semi-solid lubricant and a water-absorbing resin, can be melted by heating and can be injected, so that a waterproofing agent (water (Leakage prevention material), it is possible to fill even small gaps or gaps with complicated shapes.

[0237]

The present invention will be described in more detail with reference to the following Examples and Comparative Examples, but the present invention is not limited thereto. [Example 1] An anti-adhesion material was prepared, coated on an H-section steel, erected and pulled out by the following conditions and method. [Water-absorbing resin] As the water-absorbing resin, a commercially available crosslinked product of sodium polyacrylate (Aqualic ML-70, average particle diameter 50 µm, manufactured by Nippon Shokubai) was used. [Sheet-shaped substrate] As a sheet-shaped substrate, width 1250m
m, polyester / rayon = 60/40 weight ratio, basis weight 160 g / m ² was used. [Preparation of alkaline water-soluble resin used as water resistance imparting agent] An alkaline water-soluble resin was prepared by the following method. That is, acrylic acid was added to a 50 L capacity tank type reactor equipped with a thermometer, a stirring blade, a reflux condenser, and a dropping device.
45 kg, 2.4 kg of ethyl acrylate, 0.15 kg of methyl methacrylate, 12 g of 2,2′-azobis- (2,4-dimethylvaleronitrile) as a polymerization initiator, and 3 kg of methyl alcohol as a solvent were charged. .
In addition, 1.05 kg of acrylic acid, 2.1 kg of methyl acrylate, and 3.85 k of methyl methacrylate were added to the dropping device.
g, 28 g of 2,2′-azobis- (2,4-dimethylvaleronitrile) and 7 kg of methyl alcohol were charged.

The above methyl alcohol solution was heated to 65 ° C. with stirring in a nitrogen gas atmosphere, and reacted for 20 minutes. Thereby, the polymerization rate of the content was adjusted to 72%. Subsequently, while maintaining the internal temperature at 65 ° C., the above mixed solution was dropped uniformly from the dropping device over 2 hours. After completion of the dropwise addition, the content was aged at 65 ° C. for another 3 hours. After the completion of the reaction, the content was mixed with 10 kg of methyl alcohol to obtain a 33% by weight methyl alcohol solution of an alkali water-soluble resin.

The obtained alkaline water-soluble resin has an acid value of 1
17 mgKOH / g. As a result of performing differential scanning calorimetry on the alkali water-soluble resin, the alkali water-soluble resin had two glass transition temperatures in the range of -80 ° C to 120 ° C. [Hydrophobic lubricant] As the hydrophobic lubricant to be mixed with the water-absorbing agent, semi-solid adhesives such as high slide wax and TA
P-2, Asahi equipment (sales company), Palace Chemical Co., Ltd. (manufacturer), melting point 70 ° C, flash point 210 ° C, specific gravity 0.
905 was used. [Used H-section steel] The H-section steel used is H size = 300 *
300 mm, length L = 1.5 m, weight = 139.5 kg
Met. [Compressive strength of soil cement] The compressive strength of soil cement in which an H-section steel is built (input) is 157 N / cm ² (1
6 kg / cm ² ). (1) Preparation of sheet-like adhesion preventing material (Preparation of sheet-like substrate provided with water resistance) Under the following conditions, the above-mentioned alkaline water-soluble resin (abbreviation: ASP).
The dry coating amount of the ASP resin was 50 g / m ² . The ASP-coated side of the sheet was the front side, and the uncoated side was the back side.

Further, the length of the sheet-like substrate provided with water resistance was 10 m. This was cut in half to make two 5 m rolls. (Preparation of Mixture of Water Absorbent Resin and Hydrophobic Lubricant) The water absorbent resin and the hydrophobic lubricant were uniformly mixed at a temperature of 80 ° C.
The weight ratio between the water-absorbent resin and the hydrophobic resin was 50/50. (Preparation of a sheet-like anti-adhesive material) A mixture of the above-described water-absorbent resin and hydrophobic resin heated to near the melting point of the hydrophobic resin was applied to the back surface of the sheet-like substrate provided with the water resistance. At the same time, the back surface of another sheet-like substrate was wound together from above the mixture application surface. That is, a sheet-like anti-adhesive material having a three-layer structure was obtained in which a mixture (composition) layer of a water-absorbent resin and a hydrophobic resin was sandwiched between two sheet-like base materials having water resistance. The dry coating amount of this mixed resin is 6
It was 50 g / m ² . The application width of the mixture (composition) was 900 mm (center).

At the same time that the mixture was applied to the sheet-like base material, both ends of the sheet were cut into slits so as to have a width of 960 mm. Moreover, it cut so that a finishing length might be set to 2 m. (2) Coating of H-shaped steel with anti-adhesion material The above-mentioned sheet-shaped anti-adhesion material was adhered according to the following procedure. 1. H-section steel on the sleeper so that the web (groove) faces up
("H" shape) Lay down. 2. About 30 cm of the two sheet-like substrates overlapping the ends of the above-mentioned adhesion preventing material were peeled off. 3. The pressure-sensitive adhesive surface (the above-mentioned mixed layer) of the peeled sheet-shaped substrate was set to be lower. 4. Another worker held and fixed the peeled end of the sheet substrate. 5. The other peeled sheet-like substrate was pulled along the H steel. 6. As described above, the two sheet-like substrates adhered by pulling the sheet-like substrate were peeled off and covered the H steel. 7. After covering the H-shaped steel, the sheet-shaped substrate was prepared so that the center line of the sheet-shaped substrate overlapped the center line of the H-shaped steel. 8. The center line of the sheet-shaped substrate was stepped on with a foot, and the sheet-shaped substrate was stuck on the surface of the H-section steel web. (Stepping tightly) 9. The sheet-like base material at the corner of the H-section steel web was stepped on with feet so that air was not trapped. 10. The sheet-like base material on the inner side of the H-shaped steel flange was rubbed and attached to the outside surface of the foot. (Foot adhesion) The sheet-shaped substrate on the outer side of the H-section steel flange was pressed down by hand so that air was not trapped. 12. The H-beam was turned over. 13. An anti-adhesion material was attached to the inverted H-shaped steel in the same manner as the above operation. (Double-sided coating) The entire end of the sheet-like anti-adhesive material attached was realigned and closed with a stapler to make the anti-adhesive material into a bag shape. The anti-adhesion material formed in the bag shape was referred to as anti-adhesion material 1. (3) Built-in The building was built as follows.

The H-section steel covered with the bag-like anti-adhesion material 1 lifted by a crane truck was moved to just above the hole into which the cement milk was poured, and after confirming the position and verticality, the H-shaped steel was checked.
The section steel was carefully built. (10 cm) (4) Pulling out of H-shaped steel 9.8 kN (1 tf) after leaving for 23 days after installation
The H-shaped steel was pulled out while measuring the pulling load with a spring meter. (5) Result As a result, the maximum pulling load was 6.6 kN (0.67 t).
In f), the maximum bond strength, which is the maximum pulling force per unit surface area of the H-section steel, is 2.06 kN / m ² (0.21 tf / m ² ).
Met. Pulling out of the H-section steel was remarkably easy.

Therefore, it was possible to shorten the construction period (improve economic efficiency), improve work safety, and recycle steel materials.

Also, since the bag-shaped adhesion preventing material 1 is in close contact with the surface of the H-shaped steel at the time of installation, the surface and the shape (contour) of the H-shaped steel are clear, so that the work can be performed smoothly. It was possible to prevent the lowering of the installation accuracy.

Further, it is easy to adjust the position by shifting while keeping the adhesion preventing material in close contact (sticking) (flexible).
Further, it was easy to re-attach the torn portion.
(Easy repair) [Example 2] A mixture of the above-mentioned water-absorbent resin and hydrophobic lubricant was applied to the surface of an H-section steel having the above H size = 300 * 300 mm and length L = 1.5 m at a temperature of 80 ° C. Was applied uniformly using a roller. The coating thickness was 600 g / m ² .

The method of embedding the H-shaped steel and the method of pulling out the H-shaped steel were performed in accordance with Example 1.

As a result, the maximum pulling load was 4.1 kN.
(0.42 tf), the maximum bond strength, which is the maximum pulling force per unit surface area of the H-section steel, is 1.1 kN / m ² (0.11
tf / m ² ). Pulling out of the H-section steel was remarkably easy. Comparative Example 1 A bag-shaped comparative anti-adhesion material 1 obtained by applying only a hydrophobic lubricant (wax) to a sheet-like substrate without mixing a water-absorbent resin in Example 1 was used. , And carried out according to the method of Example 1. As a result, since the maximum pulling load exceeded the measurement limit of 9.8 kN (1.0 tf), the measurement could not be performed.

[Comparative Example 2] "Soil cement column row parent pile pulling method", which is a technical document issued by Asahi Kikai Co., Ltd., Technical Equipment Department, has an H-size 300 * 300 mm, 11 m long H-section steel surface. By applying wax (trade name; High Slide Wax) to a thickness of 8 mm,
The actual data obtained when the maximum pulling load is 608 kN (62 tf) is described. The maximum bond strength, which is the maximum pulling force per unit surface area of the H-section steel, is 34.3 kN / m.
² (3.5 tf / m ² ). Example 3 Preparation of an anti-adhesion material under the following conditions and method
The coating on the section steel, the installation of the H section steel, and the removal of the section steel were carried out. [Water absorbent resin of water absorbent lubricating layer sheet] As the water absorbent resin of the water absorbent lubricating layer sheet, a commercially available crosslinked product of sodium polyacrylate (AQUALIC CA, manufactured by Nippon Shokubai) has a particle size of 80 mesh pass (particle size). A water-absorbing resin finely pulverized to a diameter of 180 μm or less was used. [Sheet-shaped base material of water-absorbing lubricating layer sheet] As the sheet-shaped base material of the water-absorbing lubricating layer sheet, width: 1250 mm, polyester / rayon = 60/40 weight ratio, basis weight: 160 g /
An m ² woven fabric was used. (1) Preparation of anti-adhesion material sheet (Preparation of water-absorbing lubricating layer sheet) The alkali water-soluble resin (abbreviation: A
A mixed resin of SP) and the above water-absorbing resin (abbreviation: SAP) was applied to prepare a sheet to be a water-absorbing lubricating layer. The coated surface was the front surface, and the uncoated surface was the back surface. The water absorption weight was seven times its own weight. ASP and SAP are mixed and applied to the substrate, and the dry application amount of the mixed resin is 100 g / m ^2, and ASP / SAP
The weight ratio was 50/50. The resin application width was 1050 mm and the application length was 110 m. This was cut in half to make two 55 m rolls. (Preparation of Hydrophobic Lubricating Layer) The wax (hydrophobic lubricant) is applied to the back surface of the water-absorbing lubricating layer sheet, and at the same time, the back surface of another water-absorbing lubricating layer sheet is put on the wax-coated surface. Wound up. That is, an anti-adhesion material sheet having a three-layer structure in which a wax layer as a hydrophobic lubricating layer was sandwiched between the two sheets of the water-absorbing lubricating layer sheet was obtained.・ Wax application width is 900mm, wax application amount is 60
It was set to 0 to 700 g / m ² . -Both ends where wax was not applied were cut so as to have a width of 1050 mm, and the finished length was about 55 m. (2) Production of cylindrical anti-adhesive material Both sides of the anti-adhesive material sheet were sewn (plural needle stitching) while lapping a 25 mm-wide polyester band cord from both upper and lower surfaces, and a width of 1050 mm, length 18.5
m of the cylindrical anti-adhesion material 3 was produced. In addition, a handle having a length of 1 m was attached to the head of the cylindrical anti-adhesion member 3 with the strap to facilitate connection with a hanging rope for lifting and covering. In the state immediately after sewing, the two water-absorbent lubricating layer sheets are in close contact with each other due to the adhesiveness of the wax and are not in the form of a cylinder. However, since the adhesiveness of the wax is removable and versatile, The two superposed water-absorbing lubricating layer sheets can be easily peeled off, and at this time, become the tubular anti-adhesion material 3. (3) Installation of H-beams The following H-beams used as temporary buried materials for retaining walls were built under the following conditions. (Used H-section steel) The H-section steel used is H size = 450 * 200 mm, length L =
The weight was 17 m and the weight was 1.273 t. (Excavator) The excavator is an earth auger (150KVR, manufactured by P & H 11
0P) was used. (Excavation conditions) The bore diameter is 650m.
m and the excavation depth were 17 m. (Injection cement milk compound) Cement milk compound is W
/ C = 214% (water 600: cement 280: bentonite 10). (Equipment for Lifting, Building, and Coating Anti-Adhesion Material of H-Shaped Steel) A crane truck of 490 kN (50 tf) was used. (Coating of cylindrical anti-adhesion material) The cylindrical anti-adhesion material 3 was coated by the following procedure. An H-section steel was connected to a small hook of a 490 kN (50 tf) crane truck using a shackle and a wire, and the H-section steel was lifted. A reverse rotation preventing pulley through a 42 m lifting rope was attached to the large hook (parent hook), and the pulley was lifted further from the head of the H-section steel by about 1 m to about 1.5 m. 90 mm long tubular foam insulation with cushions at the four corners of the bottom of the H-section steel (Example: Insulation material = tubular independent foam, long longitudinally cut, insulation material made by INOAC CORPORATION, Product number PPS-13, outer diameter
33mm, 13mm inside diameter)
Further, a plastic connecting material (eg, an Elector part, a plastic joint J38B, manufactured by Yazaki Kako Co., Ltd.) was fitted over the foamed heat insulating material to strengthen the fixing. The hook at the tip of the lifting rope on the ground was connected to the handle of the cylindrical anti-adhesion material 3, and the opening of the head of the cylindrical anti-adhesion material 3 was opened to a depth of about 1 m. (Two sheets of the water-absorbing lubricating layer adhered by wax were peeled off.) The bottom of the H-shaped steel was wrapped around the opening of the cylindrical anti-adhesion material 3, and the lifting rope suspended on one ground was manually applied. The H-shaped steel was covered by lifting the tubular anti-adhesion material 3 by pulling (in the manner of raising a flag). In addition, the handle of the tubular anti-adhesion material 3 was directly attached to the parent hook (connection) without using a pulley and a rope, and the covering could be lifted up with a crane. (Mechanical coating) When the head of the cylindrical anti-adhesion material 3 reaches the head of the H-shaped steel, the lifting is stopped, and the extra length of the cylindrical anti-adhesion material sheet at the bottom of the cylindrical anti-adhesion material 3 is removed. They were tied together with a string or rubber band. (The front and back surfaces of the cylindrical anti-adhesive material 3 of the extra length at the bottom of the H-shaped steel were in close contact with each other due to the adhesion effect of the wax.) A reinforcing material (eg, a binder clip made of LION, width 6 cm, product number: NO. 450) was attached along the H-shape. (Building guide) A simple built-in ruler guide with a roller, in which a roller was attached to a channel square member, was prepared in advance. This guide was set on a fixing H-shaped steel (base) in which two H-shaped steels were placed in parallel with a drilled hole interposed therebetween. (Building) Building was carried out as follows.

An H-shaped steel suspended with a 490 kN (50 tf) crane truck and covered with a tubular anti-adhesion material 3 was moved to a position directly above a drilled hole into which cement milk had been injected, and its position and verticality were confirmed. Later the H-beam was carefully built.

At the time of installation, the tubular anti-adhesion material naturally adheres to the surface of the H-shaped steel due to the adhesion effect of the wax applied to the inner surface and the water pressure. The tubular anti-adhesion material 3 was built in the range while being pressed manually onto the surface of the H-shaped steel. When the erection reached a predetermined position (20 cm cueing), the erection was stopped, and the two handles of the tubular anti-adhesive material were combined to complete the erection. (Other equipment used) In addition, cement plants, generators, compressors, vacuum trucks for waste soil treatment, etc. were used. (4) Drawing out the H-section steel After leaving the building for 28 days, the H-section steel was drawn out.

A pulling load measuring load cell is incorporated into a pulley auxiliary device attached to a crane truck, and the pulling load is measured by a pulling load measuring data analyzer. The pulley equipment was removed and the entire length was pulled out using only a crane truck. In addition, 28 of the sampled soil cement
The compressive strength of the cured product after 333 days is 333 N / cm ² (34 kg
f / cm ² ). (5) Result As a result, the maximum pulling load is 196 kN (20 tf).
The maximum adhesive strength, which is the maximum pulling force per unit surface area of the H-section steel, was 6.47 kN / m ² (0.66 tf / m ² ). Extraction of the H-section steel was much easier than in the conventional method.

As a result, surprisingly, even with a long H-section steel of 17 m, auxiliary equipment such as a multiple pulley can be eliminated, and the H-section steel can be pulled out only by a crane truck. Means (Punching method is possible)
It is possible to shorten the construction period (improve economic efficiency), improve work safety, and recycle steel materials.

In addition, since the tubular anti-adhesion material 3 was in close contact with the surface of the H-shaped steel at the time of installation, the surface and shape of the H-shaped steel were clear, so that the work could be performed smoothly. Comparative Example 3 The procedure of Example 3 was repeated, except that the anti-adhesive material of the present invention was replaced with a hydrophobic lubricating layer (wax) and only a water-absorbing lubricating layer sheet was used. ,
The production of a tubular anti-adhesion material, coating on an H-section steel, embedding of an H-section steel, and the like were performed. The water-absorbing lubricating layer sheet was used as a comparative anti-adhesion material 3.

However, when the tubular H-shaped steel covered with the comparative anti-adhesion material 3 is erected, the comparative anti-adhesion material 3 may be re-input (the H-shaped steel is repeatedly charged and lifted).
Was observed in the longitudinal direction at a length of about 3 m, like a knife. This was considered to have been cut at the edge of the flange of the H-section steel upon collision with the borehole wall. Furthermore, it was observed that the comparative anti-adhesion material 3 was separated from the H-section steel surface. (Deviation of comparative anti-adhesion material 3) From this, it was clear that a large amount of cement milk was flowing into the surface of the H-section steel. Accordingly, it was determined that it was difficult to pull out the H-section steel even if the work was continued as it was, so the embedding and pulling-out of the H-section steel were stopped.

In the case of coating a long H-shaped steel as in this case, or when the diameter of the excavation hole is small, it is necessary to prevent damage to the anti-adhesion material in advance (improving the installation accuracy, complete excavation of the excavation hole). Formation, sufficient excavation, etc.). [Example 4] In Example 3, the drilling hole diameter was 650 mm.
A cylindrical anti-adhesion material 4 was produced, coated on an H-section steel, embedded with an H-section steel, and pulled out of an H-section steel, etc., in the same manner as in Example 3 except that the diameter was reduced to 600 mm.

As a result, the maximum pulling load is 402 kN
(41 tf), the maximum bond strength, which is the maximum pulling force per unit surface area of the H-section steel, is 14.5 kN / m ² (1.48 tN).
f / m ² ). Extraction of the H-section steel was much easier than in the conventional method.

Further, since the diameter of the excavation hole is reduced, it becomes extremely difficult to install (input) the H-shaped steel, and the
Repeated times, the last time had to be forced with an auger. Although the damage of the adhesion preventing material 2 was expected to be enormous by the re-feeding and pushing-in operation, the separation of the adhesion preventing material 4 at the time of re-feeding as described in Comparative Example 4 was not observed.

Since the diameter of the excavation hole was reduced, the resistance to erection was increased (poor embedding). Even though it was presumed that the anti-adhesion material 4 itself was considerably damaged, the H-shaped steel was easily removed. Is because the adhesion preventing material 4 adheres to the surface of the H-shaped steel due to the adhesion (adhesion) effect of the wax applied to the inside of the cylindrical adhesion preventing material 4, so that the adhesion preventing material 4 There is no deviation from the H-section steel surface,
It was considered that the inflow (contact) of cement milk to the H-section steel surface could be minimized.

It was also considered that the wax as the hydrophobic lubricating layer exhibited the above-mentioned adhesion effect and also exhibited the inherent lubricating performance of the wax when the H-section steel was pulled out, making the drawing easier.

Further, the drawn H-shaped steel was in a good state with almost no adhesion of cement lumps and earth and sand, without any deformation, and was in a state in which it could be immediately recycled.

Furthermore, although the wax was extremely thinly adhered to the surface of the H-section steel, it was considered that this exhibited the effect of stopping rust. [Example 5] [Water-absorbing resin of water-absorbing lubricating layer sheet] As the water-absorbing resin of the water-absorbing lubricating layer sheet, a commercially available crosslinked product of sodium polyacrylate (Aqualic ML-20, average particle size 2
0 μm, manufactured by Nippon Shokubai). [Bonding agent for water-absorbing lubricating layer sheet] As a bonding agent for attaching the water-absorbing resin to the sheet-like substrate, a natural rubber resin having a coating Gurley stiffness of 347 (mgf) {N} was used. [Sheet-shaped base material of water-absorbing lubricating layer sheet] width 1250 m
m, polyester / rayon = 60/40 weight ratio, basis weight 160 g / m ² was used. [Hydrophobic Lubricant in Hydrophobic Lubricating Layer] As the hydrophobic lubricant in the hydrophobic lubricating layer, a semi-solid lubricant (miscibility of 30 to 60) is used.
170) was used. TN-
2: Nippon Grease Co., Ltd., melting point 75.6 ° C, butterfly degree 85, viscosity 17.0 cSt / 100 ° C, flash point 280 ° C,
Light brown hard pet-like (semi-solid) (1) Preparation of anti-adhesive sheet (Preparation of water-absorbing lubricating layer sheet) Under the following conditions, the natural rubber resin and the water-absorbing resin A sheet to be a water-absorbing lubricating layer was prepared by applying the mixed resin. The coated surface was the front surface, and the uncoated surface was the back surface. The water absorption weight was seven times its own weight.・ Natural rubber and water-absorbent resin are mixed and applied to a sheet-like substrate, and the dry application amount of the mixed resin is 100 g / m ² ,
The weight ratio of natural rubber / water-absorbent resin was 50/50. The resin application width was 1050 mm and the application length was 110 m. This was cut in half to make two 55 m rolls. (Preparation of Hydrophobic Lubricating Layer) The semi-solid hydrophobic lubricant is applied to the back surface of the water absorbing lubricating layer sheet, and at the same time, the back surface of another water absorbing lubricating layer sheet from above the hydrophobic lubricant applying surface. And rolled up. That is, an anti-adhesion material sheet having a three-layer structure in which the hydrophobic lubricating layer was sandwiched between the two sheets of the water-absorbing lubricating layer sheet was obtained. The hydrophobic lubricant application width was 900 mm, and the hydrophobic lubricant application amount was 600 to 700 g / m ² . -Both ends where the hydrophobic lubricant was not applied were cut so as to have a width of 1050 mm, and the finished length was about 55 m. (2) Preparation of anti-adhesion material for test The above anti-adhesion material sheet was cut to have a width of 75 mm and a length of 1
An anti-adhesion material 5 of 40 mm was produced. (3) Installation of steel plate The following steel plate used as a support was installed under the following conditions. (Support used) A steel plate was used as a support. The steel plate is 70 mm in width, 150 mm in length and 0.8 mm in thickness (Nippon Test Panel Osaka Co., Ltd., standard test plate JIS
3141) was used. (Building) Building was performed by putting steel plates into soil cement milk as follows. The two water-absorbing resin sheets, which are the two water-absorbing lubricating layers, adhered via the semi-solid lubricant of the adhesion preventing material 5 are peeled off. As a result, two water-absorbent resin sheets having the semi-solid pressure-sensitive adhesive adhered to the back surface are formed, and each sheet becomes a new anti-adhesion material, and the anti-adhesion materials 5-1 and 5-2 are formed. An anti-adhesion material 5-1 was attached to a steel plate using the adhesive force of the hydrophobic lubricating layer. Next, the steel plate was turned upside down, and the same operations as those described above were performed, and the adhesion preventing material 5-2 on the opposite surface was attached. A connection steel plate coated with the above anti-adhesion material was vertically erected in cement milk (input). In addition, the compounding of soil cement milk is water: cement: bentonite: clay = 2
518: 582: 60.3: 1622, and the immersion depth was 140 mm. (4) Drawing of steel plate After being left for 3 days after being built, it was drawn with the following drawing machine.
The pulling load at that time was measured. The drawing machine is JIS L
Using a low-speed elongation tensile tester based on a tensile test method (tensile strength) of 1096 (general textile test method), the measurement was performed at a tensile speed of 20 mm / min. (Unit: N
(Kgf)) (5) Results As a result, the maximum pulling load is 9.8 N (1.0 kg).
In f), the maximum adhesive strength, which is the maximum pulling force per unit surface area of the steel sheet, was 500 N / m ² (51.0 kgf / m ² ). The drawing was very easy.

From these results, in actual on-site construction,
It was expected to shorten the construction period (improve economic efficiency), improve work safety, and recycle steel materials.

At the time of building, the adhesion preventing material is in close contact with the surface of the steel sheet.
Since the surface and shape of the steel material can be clarified, it is possible to prevent a decrease in erection accuracy. The obtained anti-adhesion material 5 had a very soft hand and improved adhesion to the steel sheet surface. In addition, in order to accurately determine the position to be stuck, it was easy to adjust the position by shifting the position while sticking the anti-adhesive material 5 and it was easy to be flexible. Furthermore, it was easy to reattach. (Easy repair)

[0264]

The composition is a composition containing at least a water absorbing agent and a hydrophobic lubricant, and the weight composition ratio of the water absorbing agent to the hydrophobic lubricant is in the range of 1: 100 to 100: 1. Configuration.

According to the above arrangement, there exists between the objects,
The water-absorbing agent and / or hydrophobic lubricant that has absorbed water exhibits adhesion prevention between objects, lubricity, and water blocking (leakage prevention). Due to the synergistic effect of the water absorbing agent and the hydrophobic lubricant, higher adhesion between objects can be prevented.

A more preferred composition of the present invention has a constitution in which the water absorbing agent is a water absorbing resin.

According to the above structure, a gel having flexibility and excellent lubricity is formed by the water-absorbing swelling property of the water-absorbing resin. Achieves adhesion prevention and waterproofing of voids.

Further, more preferred compositions of the present invention include:
The structure is such that the hydrophobic lubricant is a semi-solid lubricant.

According to the above configuration, the adhesion between objects is more reliably prevented by the high lubricating ability of the semi-solid pressure-sensitive adhesive.
In addition, due to the high tackiness of the semi-solid pressure-sensitive adhesive, the work of applying (adhering) to the surface of an object or a sheet-like base material by applying or pasting the same is facilitated, and the handling property and productivity are improved. Furthermore, mixing with the water absorbing agent is easy, and the water absorbing agent can be uniformly dispersed and mixed with the hydrophobic lubricant without sedimentation of the water absorbing agent.

[0270] Lubricants are classified into three main types at room temperature from 10 ° C to 30 ° C: liquid lubricants, semi-solid lubricants, and solid lubricants. There may be a problem such as liquid dripping or falling off at the time of adhesion (adhesion) work such as coating or sticking to the surface of the base material. On the other hand, semi-solid lubricants such as waxes and greases prepared in a semi-solid state by mixing mineral oil at normal temperature have adhesiveness (adhesion to steel and sheet-like base materials) as well as lubrication performance. It facilitates application and sticking, such as solventless application, to an object or a sheet-like substrate, and improves handleability and productivity. In particular, a wax-based semi-solid lubricant is particularly preferred, and can be melt-coated and further improves workability.

The first anti-adhesion material of the present invention is a material for preventing adhesion between the hydraulic composition and the support, and has a constitution containing at least a mixture containing a water-absorbing agent and a hydrophobic lubricant. .

According to the above arrangement, the adhesion between the support and the hydraulic composition can be prevented by interposing the anti-adhesion material between the support and the hydraulic composition.

For example, it is possible to prevent the adhesion between the H-shaped steel as a support and the cured soil cement as a hydraulic composition,
Facilitates withdrawal and recovery of H-section steel.

The first anti-adhesion material of the present invention has a structure in which at least a mixture containing a water-absorbing agent and a hydrophobic lubricant is directly adhered to the surface of a support.

According to the above arrangement, the adhesion between the support and the hydraulic composition can be prevented by directly applying the anti-adhesion material to the surface of the support by coating or the like. Further, for example, an H-shaped steel coated with an anti-adhesion material by coating can be easily inserted (buried) into a hole having a small hole diameter because the outline of the H-shaped steel can be clarified.

In a preferred method of removing a support using the first anti-adhesion material of the present invention, a mixture of a water-absorbing agent and a hydrophobic lubricant is applied to at least a part of the surface of a support such as an H-section steel. A step of applying an anti-adhesion material including, a step of contacting the support with a hydraulic composition, a step of curing the hydraulic composition,
And a step of sequentially removing the support.

According to the above arrangement, the adhesion between the support and the hydraulic composition is reliably prevented. The second anti-adhesion material of the present invention has a configuration in which the first anti-adhesion material further includes a sheet-like substrate.

According to the above arrangement, the adhesion between the support and the hydraulic composition is prevented by interposing the anti-adhesion material between the support and the hydraulic composition.

For example, it is possible to prevent the adhesion between the H-shaped steel as the support and the cured soil cement as the hydraulic composition,
Facilitates withdrawal and recovery of H-section steel.

A more preferred second anti-adhesion material of the present invention has a sheet-like base material layer disposed on the hydraulic composition layer side and contains a water absorbing agent and a hydrophobic lubricant on the support surface side. This is a configuration in which a mixture layer is arranged.

According to the above configuration, the improvement of the coating workability and the prevention of the adhesion between the support and the hydraulic composition are realized more reliably. Disposing a sheet-like base material layer of this anti-adhesive material on the hydraulic composition side, and disposing a composition layer containing a mixture of a water-absorbent resin and a hydrophobic lubricant on the surface side of a support such as an H-section steel. However, it is particularly preferable because the adhesion preventing material can be adhered (sticked) to the surface of the support by utilizing the adhesion force of the composition.
For example, the advantages of adhering a sheet-like anti-adhesive material to a support such as an H-section steel are as follows: removability is improved, and handling and workability of the anti-adhesion material are improved; And (2) that the contour is clear and the erection accuracy is improved, and that even if the anti-adhesion material breaks during construction, the anti-adhesion material hardly separates from the surface of the support and can maintain high anti-adhesion properties.

A preferred method of removing a support using the second anti-adhesion material of the present invention is a method of removing at least a part of a support such as an H-section steel by mixing a mixture of a water-absorbing agent and a hydrophobic lubricant with a sheet. It is a configuration that includes, in order, a step of coating with an anti-adhesive material including a substrate, a step of contacting the support with a hydraulic composition, a step of curing the hydraulic composition, and a step of removing the support.

According to the above arrangement, the prevention of adhesion between the support and the hydraulic composition is more reliably achieved.

The third anti-adhesion material of the present invention is a material for preventing adhesion between the hydraulic composition and the support, and comprises at least a water-absorbing lubricating layer containing a water-absorbing agent and a hydrophobic lubricant. And a hydrophobic lubricating layer.

According to the above arrangement, a water-absorbing lubricating layer which exhibits an anti-adhesive property and a lubricating property between the hydraulic composition (cured product) and the support (both) by absorbing water; Due to the synergistic effect with the hydrophobic lubricating layer containing the hydrophobic lubricant having the anti-adhesive performance and the lubricating performance, it is possible to further prevent the adhesion between the two. For example, it is possible to easily realize the extraction and recovery of the H-shaped steel from the cured soil cement. Also, the coating operation is improved, and the H-shaped steel coated in the soil cement can be easily supplied.

[0286] A more preferred third anti-adhesion material of the present invention has a structure in which the water absorbing agent is a water absorbing resin.

According to the above configuration, the water-absorbing lubricating layer forms a gel layer having excellent flexibility and lubricity due to the water-absorbing swelling property of the water-absorbing resin. Due to the separation performance of both the (cured product) and the support,
A higher degree of prevention of adhesion between the two is realized.

The fourth anti-adhesion material of the present invention is the third anti-adhesion material of the present invention, wherein the water-absorbing lubricating layer is a lubricating layer containing at least an alkali water-soluble resin.

The water-absorbing lubricating layer preferably has a water-absorbing resin adhered to the substrate from the viewpoint of processing and economy. However, when a hydrophobic bonding agent is used as a bonding agent, the water-absorbing swellability of the water-absorbing resin is impaired. In some cases, when a water-soluble bonding agent is used, the water-absorbing resin easily falls off when wet with rain or when it comes into contact with a liquid hydraulic composition before curing, and any of the expected Performance may not be exhibited. On the other hand, the alkaline water-soluble resin is not easily solubilized even when it comes into contact with water such as rain, for example, before use, such as before installation, and has a unique high adhesive strength, so that the water-absorbent resin falls off. Can be prevented. On the other hand, alkaline water-soluble resin is
Since it is solubilized in a hydraulic composition such as cement water exhibiting alkalinity, it has the feature that it does not inhibit water absorption swelling of the water-absorbent resin (for example, does not cause swelling regulation) at the time of use during installation. I have.

According to the above configuration, the use of the water-absorbing lubricating layer containing the alkali water-soluble resin realizes a higher degree of prevention of adhesion between the hydraulic composition (cured product) and the support.

The fifth anti-adhesion material of the present invention is the third anti-adhesion material of the present invention, wherein the water-absorbing lubricating layer is formed of at least a resin having a coating Gurley hardness of 1000 (mgf) {N} or less. The lubricating layer includes a lubricating layer. According to the above configuration, since the water-absorbing agent is adhered by a soft resin having a coating Gurley hardness of 1000 (mgf) {N} or less, swelling (gelling) when the water-absorbing agent of the water-absorbing lubricating layer absorbs water is performed. ) Regulations are small,
The adhesion between the hydraulic composition (cured product) and the support can be easily prevented.

The sixth anti-adhesion material of the present invention is the same as the first to fifth anti-adhesion materials of the present invention, wherein the hydrophobic lubricant is a semi-solid lubricant.

According to the above configuration, the following improvement of the coating workability and the more reliable prevention of the adhesion between the two can be realized. In addition, the compounding of the hydrophobic lubricating layer is facilitated.

The hydrophobic lubricating layer side of the anti-adhesion material of the present invention is H
It is particularly preferable to dispose the anti-adhesion material on the surface of the support by utilizing the adhesion force by disposing it on the surface side of the support such as a shaped steel. For example, the advantage of adhering a sheet-shaped anti-adhesive to a support such as H-section steel is that the re-peelable adhesion characteristic of a semi-solid lubricant makes it possible to freely adjust re-attachment, making it extremely easy to apply. Can be In the construction of the retaining wall, the surface of the H-shaped steel can be clearly confirmed by bringing the anti-adhesion material into close contact with the H-shaped steel (support), so that the erection accuracy can be increased and the workability can be improved. In the construction of the retaining wall, the anti-adhesion material of the present invention can make the anti-adhesion material adhere to the surface of the H-section steel by the adhesion effect (adhesion effect) of the semi-solid lubricant. Even if it is damaged, the adhesion preventing material does not separate from the H-shaped steel surface, and the inflow (contact) of cement milk to the H-shaped steel surface can be minimized. Therefore,
Easy to collect and recover H-section steel. And the like.

A semi-solid semi-solid lubricant such as wax or grease prepared into a semi-solid state by blending mineral oil at room temperature has an adhesive force (adhesive force to steel) together with lubricating performance. Solvent-free application to the water-absorbing lubricating layer is possible and compounding is facilitated. In particular, a wax-based semi-solid lubricant is particularly preferred, and can be melt-coated and further improves workability.

[0296] The above-mentioned semi-solid lubricant preferably has a mixing consistency of 3 to 385, more preferably 5 to 385.
To 250, more preferably 10 to 170. If the penetration is less than 3, the lubricity is reduced, the adhesion to the steel material is also reduced, and the material tends to fall off. Further, there is a problem that the melting takes a long time and the melt coating becomes complicated. Further, when the penetration exceeds 385, there is a problem that liquid dripping occurs and the surroundings are contaminated and the adhesive strength is reduced.

Further, the third to sixth anti-adhesion materials of the present invention preferably have a water-absorbent lubricating layer disposed on the hydraulic composition layer side and a hydrophobic lubricating layer disposed on the support surface side. Configuration.

According to the above configuration, the water-absorbing lubricating layer can easily exhibit water-absorbing swelling, and the adhesion of the hydrophobic lubricating layer allows the anti-adhesion material to easily adhere (stick) to the support surface. Therefore, the above-mentioned effects can be exhibited, and the adhesion between the hydraulic composition (cured product) and the support can be further prevented.

The seventh anti-adhesion material of the present invention comprises at least a sheet-like base material, a water-absorbing agent, and a coating film having a Gurley hardness of 10%.
It is a configuration including a resin of 00 (mgf) {N} or less.

According to the above configuration, the prevention of adhesion between the hydraulic composition (cured product) and the support can be easily realized.

The eighth anti-adhesion material of the present invention is the same as the first to seventh anti-adhesion materials of the present invention, wherein the water absorbing agent is a water-absorbing resin.

According to the above arrangement, the mixture or the water-absorbing lubricating layer containing the water-absorbing resin and the hydrophobic lubricant forms a gel layer which is flexible and excellent in lubricity due to the water-absorbing swelling property of the water-absorbing resin component. However, due to the excellent lubricating performance and the separating performance of the hydraulic composition (cured product) and the support of the gel layer,
The adhesion between the hydraulic composition (cured product) and the support is easily prevented.

The first application of the anti-adhesion material of the present invention is to use the anti-adhesion material of the present invention for preventing adhesion between a temporarily embedded material for a retaining wall and a hardened cement composition.

[0304] The adhesion between the temporary burying material for the retaining wall and the cured cement composition is more completely prevented by the adhesion preventing performance of the above-mentioned adhesion preventing material.

A second application of the anti-adhesion material of the present invention is to use the anti-adhesion material of the present invention to prevent adhesion between a temporarily buried object and fluidized soil.

The adhesion between the temporarily buried object and the fluidized soil is more completely prevented by the adhesion preventing performance of the above-mentioned adhesion preventing material.

A third use of the composition of the present invention is to use the composition of the present invention and an anti-adhesion material for stopping water and preventing water leakage.

In particular, the anti-adhesion material containing the mixture of the present invention has a volume expansion property due to water absorption due to the properties of the water-absorbing resin, and has hydrophobicity or water repellency depending on the properties of the hydrophobic lubricant. Waterproofing and water leakage prevention at gaps or cracks in sheet pile joints, ground, bedrock, concrete, etc. are reliably realized. In addition, since the anti-adhesion material containing the mixture of the water-absorbing agent and the hydrophobic lubricant of the present invention can be made into a solventless and extremely low-viscosity (shaffy) liquid by heating, the working environment is safe and the injection is possible. Excellent workability and workability because the work is easy. In addition, it can be injected into any small gap.

In the method of removing a support of the present invention, a step of coating at least a part of a support such as an H-section steel with the anti-adhesion material of the present invention, a step of bringing the support into contact with a hydraulic composition, It is a configuration that includes, in order, a step of curing the hard composition and a step of removing the support.

[0310] According to the above structure, a water-absorbing agent and a hydrophobic lubricating agent exhibiting an anti-adhesive property and a lubricating property between the hydraulic composition (cured product) and the support (both) by absorbing water. And a water-absorbing agent component or a water-absorbing lubricating layer containing a mixture, having an anti-adhesion property and a lubricating performance of both, a hydrophobic lubricant component or a hydrophobic lubricating layer of a mixture containing a water-absorbing agent and a hydrophobic lubricant. Due to the synergistic effect of the above, the support can be easily removed.

[Brief description of the drawings]

FIGS. 1A and 1B both show a procedure for forming a coating according to an embodiment of the present invention by coating a support (temporary buried material) with a sheet-like anti-adhesion material (coating material). It is a schematic perspective view shown.

2 (a) to 2 (d) show a procedure for forming a coating according to another embodiment of the present invention by coating a support (temporary buried material) with a sheet-like anti-adhesion material (coating material) FIG.

FIG. 3 is an explanatory view showing a state in which a sheet-like adhesion preventing material is sewn into a bag-like shape.

FIG. 4 (a) is an explanatory view showing the structure of a mounting device for preventing breakage of an anti-adhesive material used in the method for coating a sheet-like anti-adhesive material of the present invention, and FIG. It is explanatory drawing which shows the state which mounted | worn.

FIG. 5 is a schematic cross-sectional view showing the structure of a sheet-shaped adhesion preventing material according to one embodiment of the present invention.

FIG. 6 is a schematic cross-sectional view showing another structure of the sheet-like adhesion preventing material.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Sheet-shaped anti-adhesion material (covering material) 2 Support (temporary buried material) 3 String (rope) 4 Worker 5 Pulley 6 Crane 10 Sheet-shaped anti-adhesion material (covering material) 11 Fixing jig 14 Tip cover 15 Reinforcing band 16 Hanging string 17 Tying string 18 Anti-adhesion material breakage prevention fitting 21 Bag-shaped anti-adhesion material 22 Support (temporary buried material) 31 Sheet-like base material layer or water-absorbing lubrication layer 32 Water-absorbing agent and hydrophobic lubrication Layer or hydrophobic lubricant layer containing the agent 33 Sheet-like anti-adhesion material

Continuation of the front page (56) References JP-A-62-227698 (JP, A) JP-A-7-247549 (JP, A) JP-A-4-16618 (JP, A) (58) Fields investigated (Int) .Cl. ⁷ , DB name) E02D 9/02 C10M 171/00 C10N 40:36 C10N 50:10

Claims (11)

(57) [Claims] 1. A material that prevents adhesion of the hydraulic composition and the support, at least, includes a mixture containing a water-absorbing agent and a hydrophobic lubricant, a sheet-like base material, water-absorbing agent Semi-solid with a consistency of 5 to 250
Weight ratio to the hydrophobic lubricant of 1:10 to 10: 1
The mixture that is in the range is adhered to the sheet-like substrate surface
An anti-adhesion material, characterized in that: 2. A semi-solid material which prevents adhesion between a hydraulic composition and a support, and at least a water-absorbing lubricating layer containing a water-absorbing agent and has a compatibility of 5 to 250.
And a hydrophobic lubricant layer comprising a hydrophobic lubricant, the sheet-like substrate
An anti-adhesion material comprising: 3. A water-absorbing lubricating layer is formed on one surface of a sheet-like substrate.
And the water-absorbing lubricating layer of the sheet-like substrate is formed.
Note that a hydrophobic lubricant layer is formed on the
3. The anti-adhesion material according to claim 2, wherein 4. The method according to claim 1, wherein the water-absorbing lubricating layer comprises an alkali water-soluble resin.
A dispersion obtained by dissolving a water absorbing agent in an organic solvent is used as a sheet-like base.
Spray or apply to the surface of the sheet material to apply it to the surface of the sheet
Using a water-soluble resin as a bonding agent and attaching a water-absorbing agent
The anti-adhesion material according to claim 2 or 3 , wherein the anti-adhesion material is a resin layer composed of an alkali water-soluble resin and a water absorbing agent . 5. The water absorbing lubricant layer, according to claim 2 or 3, characterized in that a lubricant layer comprising at least coating Gurley steel softness 1000 (mgf) {N} following rubber resin Anti-adhesion material. 6. The anti-adhesion material according to claim 1 , wherein the water absorbing agent is a water absorbing resin. 7. A bag-shaped sheet-like substrate into which a support can be inserted.
Or being formed in a cylindrical shape.
7. The adhesion preventing material according to any one of 1 to 6. 8. In the state where the support is covered, the support side
Feature a mixture or hydrophobic lubricant layer
The anti-adhesion material according to claim 7, which is characterized in that: 9. A method of using the anti-adhesion material according to any one of claims 1 to 8 for preventing adhesion between a temporarily embedded material for a retaining wall and a hardened cement composition. 10. A method of using the anti-adhesion material according to claim 1 for preventing adhesion between a temporarily buried object and a fluidized soil. 11. A step of coating at least a part of the surface of the support with the anti-adhesive material according to any one of claims 1 to 8 , and a step of contacting the coated support with a hydraulic composition. A method of curing the hydraulic composition, and a step of removing the support in this order.