KR20110022797A - Waterstop composition, waterstop band, manufacturing method of waterstop band, structure and method of construction joint using waterstop band, waterstop plate and joint fitting for construction joint - Google Patents

Abstract

PURPOSE: A waterstop composition and a waterstop band are provided to prevent the leakage and to self-cure cracks by growing insoluble crystals when water leakage occurs due to cracks or gaps at a concrete construction joint. CONSTITUTION: A waterstop composition comprises 100.0 parts by weight of cement, 10-30 parts by weight of zeolite, 5-20 parts by weight of sodium carbonate, 10-30 parts by weight of aluminum sulfate, 10-30 parts by weight of bentonite with a particle size of 1-3 mm, 20-70 parts by weight of silica with a particle size of 100-250 mm, 20-200 parts by weight of silica with a particle size of 1-3 mm, and 3-30 parts by weight of anhydrous gypsum.

Description

Water stop composition, water stop band, water stop band manufacturing method, construction joint structure and method using water stop band, water stop composition, water stop band, manufacturing method of waterstop band, structure and method of construction joint using waterstop band, waterstop plate and joint fitting for construction joint}

The present invention relates to an index agent composition, an index agent band, a method for producing an index agent band, a construction joint structure and method using an index agent band, an index plate for a construction joint, and a joining steel.

Concrete construction joints, that is, construction joints (construction joint) is one of the areas that require the most attention when concrete construction, if incorrect construction may cause structural problems throughout the concrete structure. In particular, water leakage may occur in case of cracks in construction joints or when concrete is poured without removing foreign substances such as lattance, dust, stone, oil, formwork remover, and the like.

Cracks may occur in concrete joints for various reasons. If water leaks occur at these cracks, the reinforcing steel inside the structure may be corroded, and the internal finishing materials may be damaged and the insulation performance may be deteriorated. This can lead to problems such as shortened life and costly maintenance costs.

In order to prevent this, various methods for waterproofing have been attempted, such as an index plate, waterproof mortar coating, epoxy adhesive, bentonite band, and the like. For example, a bentonite band, which is a form of a bentonite band wrapped with a water-soluble polymer bonded to a concrete construction joint, is covered with a net. In the case of using the water-based system to block the inundation, there was a limitation that it could not permanently cope with continuous leakage.

In the process of constructing underground concrete structures, reservoirs, tunnels, submarine tunnels, subway structures, etc., the water-expanding index agent or bentonite bands installed after pre-casting concrete are unexpectedly exposed to rainwater or groundwater in the underground structure before the post-installation process. When submerged, the water expansion index agent may swell in advance, resulting in structural defects during post-installation. As the water-expansion index agent swells, the concrete hardens in the form of wrapping around the swollen portion, which is in the form of a long band in the form of bentonite gel. There may be problems such as deviating from the stroke.

On the other hand, the concrete construction joints are provided with formwork and rebar in the working conditions, it is difficult to completely seal the side of the formwork with plywood or lumber. Conventionally, a method of sealing the side of the formwork with plywood and lumber and sealing the voids with a cloth or tape has been applied, and metal lath instead of plywood has been used.

In other words, the concrete construction joints are one of the most defects in concrete construction, which is particularly vulnerable to waterproofing, and the general specification requires that the index plate be installed in the concrete construction joints.

The index plate has been manufactured in various forms according to its function and purpose of the structure, and in general, it has been produced in the form of a cylindrical hollow space in the center to cope with stretching. In particular, the index plate 8 embedded in the concrete construction joint, as shown in Figure 1a, so that the center of the cylindrical hollow space ('C' in Figure 1a) is located on the connecting surface 6 so as to correspond to the expansion and contraction. After the new concrete (4) is buried and installed in the old concrete (2), the new concrete (4) must be poured.

In this case, if the index plate is buried too much or too little, the index plate may not be able to absorb the expansion and contraction of the concrete and may be broken, which may cause leakage in the construction joint. In particular, special care should be taken in the case of installing the index plate and joint filler at the expansion joint of the underground structure where the leak acts as a fatal defect in the structure. As such, when the index plate is incorrectly constructed, the use of nails or wires to fix the index plate on the concrete joint surface may also be a major defect in preventing the index plate from functioning.

In addition, the conventional construction joint site, as shown in Figure 1b, the chipping the coarse aggregate and the latency portion of the joint surface 6 of the old concrete (2) and cemented the new concrete (4) After the concrete is cured and cured with concrete and cured, the exterior wall is finished.In order to derive the stretching effect, cracking and leakage prevention effect after curing the concrete, the construction joint part is grooved with a chain saw. ('S' of Figure 1b) and the construction was made by filling the sealing material 27 therein.

However, this type of work requires double construction of the construction joint and the formation of the grooves in the construction joints, so that the air becomes long, the operation is difficult and cumbersome, and the sealing material is damaged in the process of processing the grooves. There is a fear of leaking through cracks and cracks.

The background art described above is technical information possessed by the inventors for the derivation of the present invention or acquired during the derivation process of the present invention, and is not necessarily a publicly known technique disclosed to the general public before the application of the present invention.

In the present invention, when a leak occurs due to cracks or crevices in the concrete construction joint, insoluble crystals grow at the site, thereby preventing the leak and self-healing the cracks, the index composition, the index band and the index The present invention provides a band manufacturing method.

In addition, the index plate for the construction joint improved to facilitate the installation of the water-proof band, and the joint steel for the construction joint, which facilitates the installation work of the index plate and enhances the water-repellent performance, and solves the problem of leaks in the concrete joints. To provide.

In addition, after the leak occurs in the concrete construction joints and the water-proof band exhibits the exponential performance, even if the water leaks again, the water-proof band structure is continuously installed by the water-resistant band structure installed on the inside, thereby maintaining the construction cost and maintenance. It is to provide concrete construction joint structure and method that can reduce maintenance cost.

According to one aspect of the invention, based on cement, 100 parts by weight of cement, 10 to 30 parts by weight of zeolite, 5 to 20 parts by weight of sodium carbonate, 10 to 30 parts by weight of aluminum sulfate, 10 to 30 parts by weight of bentonite having a particle diameter of 1 to 3 mm There is provided a water repellent composition comprising 20 to 70 parts by weight of silica having a particle size of 100 to 250 μm, 20 to 200 parts by weight of silica sand having a particle size of 1 to 3 mm, and 3 to 30 parts by weight of anhydrous gypsum in powder form. Silica may have an average particle diameter of 20 to 50㎛.

On the other hand, according to another aspect of the present invention, the water-repellent band is characterized in that the water-repellent composition is mixed with a water-soluble polymer solution, the mixture is applied to a nonwoven fabric or a mesh, or extruded and dried to form a band form Is provided.

As the water-soluble polymer solution, polyethylene oxide, polyvinylpyrrolidone, cellulose resin, polyvinyl alcohol, polyvinylacetate, water-soluble epoxy resin, water-soluble silicone resin, water-soluble urethane resin, etc. can be used. With respect to the part, 10 to 99 parts by weight of water may be further mixed and used.

Meanwhile, according to another aspect of the present invention, (a) mixing zeolite and bentonite in an aqueous solution of aluminum sulfate, followed by mixing with a water-soluble polymer, (b) extruding the mixture produced from step (a), followed by drying and grinding Step of preparing into a pellet (c), (c) 10 to 50 parts by weight of pellets, 5 to 20 parts by weight of sodium carbonate, 10 to 30 parts by weight of bentonite having a particle size of 1 to 3 mm, particle size per 100 parts by weight of cement and cement 20 to 70 parts by weight of the silica having 100 to 250 μm, 20 to 200 parts by weight of silica sand having a particle diameter of 1 to 3 mm, and 3 to 30 parts by weight of anhydrous gypsum, and (d) the mixture produced from step (c). Provided is a method for preparing an index agent band comprising mixing a water soluble polymer solution.

Step (d) may comprise further mixing 10 to 99 parts by weight of water, relative to 1 to 90 parts by weight of the water soluble polymer solution, after step (d), (e1) the mixture resulting from step (d) It may further comprise the step of applying a non-woven fabric or mesh, or by extrusion and drying to form a band. As the water-soluble polymer solution, polyethylene oxide, polyvinylpyrrolidone, cellulose resin, polyvinyl alcohol, polyvinylacetate, water-soluble epoxy resin, water-soluble silicone resin, water-soluble urethane resin and the like can be used.

On the other hand, according to another aspect of the present invention, a body portion embedded in the pre-constructed concrete structure, a pair of wings connected to the body portion, extending to both sides in a T-shape along the connecting surface of the concrete structure, The index plate for the construction joint (construction joint) is formed in the wing portion, including a band groove portion is inserted into the water-repellent band is provided.

On the other hand, according to another aspect of the present invention, the joint hardware used in the construction joint portion of the concrete structure, the joint groove portion is connected to the formwork, and forms a saw-cut on the surface of the concrete structure, one end of the joint groove portion It is connected to, and includes a metal lass that is installed to cover the connecting surface of the pre-constructed concrete structure, the other end of the metal las joined to the construction joint, characterized in that the binding to the wing of the water plate installed in the concrete structure Hardware is provided. After demoulding the formwork, the filler may be filled in the joint groove portion.

On the other hand, according to another aspect of the present invention, as a joint structure for joining concrete to form a structure of a predetermined shape, the formwork is installed to partition the outer shape of the structure, and is pre-constructed, the joint surface is formed on the surface It is formed in the pre-cast concrete structure, the body portion embedded in the concrete structure, a pair of wings connected to the body portion and extending to both sides in a T-shape along the connecting surface, and a pair of wings respectively. Is installed on the joint surface so as to be inserted into each of the index plate including a pair of band grooves, the pair of band grooves, a pair of water-resistant band to block the water penetrates along the joint surface, connected to the formwork The joint groove portion forming a saw-cut on the surface of the concrete structure, one end is connected to the joint groove portion, the other end is bound to the wing portion to cover the seam surface The concrete construction joint structure including a joint comprising locking hardware installed metallic lath portion which is provided.

On the other hand, according to another aspect of the present invention, as a method of forming a structure of a predetermined shape by connecting the concrete on the basis of a predetermined seaming surface, the step of installing a formwork to partition the appearance of the structure, the surface of the structure Joining hardware including a joint groove forming a saw-cut, and a metal lath one end is connected to the joint groove, the joint groove is connected to the formwork, the metal lath is installed so as to cover the joint surface Step, the body portion, connected to the body portion and the index plate including a pair of wing portions extending to both sides in a T-shape along the connecting surface, and a pair of band grooves respectively formed on the pair of wings, And installing the wing to be coupled to the other end of the metal lath, and pre-casting concrete on one side of the connecting surface to bury the body. The concrete construction joint method is provided.

After the casting, the method may further include inserting and installing a pair of watertight bands for blocking water penetrating along the joint surface, respectively, in a pair of band grooves, and following installation of the watertight band. The method may further include post-casting concrete on the other side of the face.

Other aspects, features, and advantages other than those described above will become apparent from the following drawings, claims, and detailed description of the invention.

According to a preferred embodiment of the present invention, by installing the water-resistant band in the concrete construction joint, the joint structure between the old and new concrete structures when the concrete construction joint is dense, cracks occur in the interior and exterior of the concrete structure and water is Even if it penetrates, the degree of function can be exerted, and insoluble crystals are formed in the index band, which has the effect of self-healing the cracks. This self-healing function permanently responds to leaks and can produce watertight concrete.

In addition, by using an improved index plate to install the water-proof band double, and the joining steel bent galvanized steel sheet and formed a metal lath to facilitate the installation of the index plate and to form a form for the joint surface. , A compact concrete structure that solves the problems associated with the installation of the index plate, simplifies the construction of construction joints, simplifies the process of forming saws on the concrete surface, and effectively blocks cracks and leaks in the construction joints. Can be implemented.

As the invention allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all changes, equivalents, and substitutes included in the spirit and scope of the present invention.

Terms including ordinal numbers such as first and second may be used to describe various components, but the components are not limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

When a component is referred to as being "connected" or "connected" to another component, it may be directly connected to or connected to that other component, but it may be understood that other components may be present in between. Should be.

As used herein, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, action, component, part, or combination thereof described on the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

In the following description of the present invention with reference to the accompanying drawings, the same components are denoted by the same reference numerals regardless of the reference numerals, and redundant explanations thereof will be omitted. In the following description of the present invention, when it is determined that the structural description of the related known technology may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted.

This embodiment is characterized by a construction joint structure and method for preventing the leakage problem of the water composition, the water band, the index plate, the joining hardware and the construction joints for installation in concrete construction joints.

The water repellent composition according to the present embodiment has 10 to 30 parts by weight of zeolite, 5 to 20 parts by weight of sodium carbonate, 10 to 30 parts by weight of aluminum sulfate, and 1 to 3 mm of bentonite with respect to 100 parts by weight of Portland cement. Parts by weight, 20 to 70 parts by weight of silica having a particle size of 100 to 250 μm (average particle size of 20 to 50 μm), 20 to 200 parts by weight of silica sand having a particle size of 1 to 3 mm, and 3 to 30 parts by weight of anhydrous gypsum, Can be done.

Sodium carbonate generates carbonate anions when leakage occurs due to cracks or crevices in the interior and surface of the concrete structure, and reacts with ionic substances such as calcium ions dissolved in the leaked water to form insoluble calcium carbonate. It serves to fill.

When the amount is less than 5 parts by weight based on 100 parts by weight of cement, the amount of insoluble calcium carbonate is low, which does not effectively represent the role of generating insoluble solids. When the amount is more than 20 parts by weight, the reaction of generating calcium carbonate proceeds excessively. It can be harmful to concrete such as bleaching. In addition, excessively produced calcium carbonate may inhibit insoluble crystal formation reactions such as calcium silicate crystal formation reaction.

Aluminum sulfate is adsorbed by zeolite and promotes the formation of various insoluble crystals in the structure when leakage occurs. When used at less than 10 parts by weight with respect to 100 parts by weight of cement, less insoluble crystals are produced. It does not exhibit a waterproof function, and when used in more than 30 parts by weight, the insoluble crystal formation reaction is excessively progressed may reduce the physical properties of the structure.

Bentonite absorbs water or moisture and grows crystals by reacting with various compounds in the leaked water due to its swelling property. Absorption of water leaked when used at 10 parts by weight or less based on 100 parts by weight of cement Its ability to grow and crystallization is weak, so it does not have an effective waterproofing function, and when used at 30 parts by weight or more, it may act to inhibit the reaction of other components that produce insoluble crystals due to excessive water absorption at the initial stage of leakage.

Silica may be used having an average particle diameter of 20 ~ 50㎛, and when a leak occurs in the concrete structure, it reacts with various ionic compounds in the leak to generate insoluble crystals such as calcium silicate, insoluble crystal growth reaction It progresses quickly and plays a role in showing effective waterproof function.

When the amount is less than 20 parts by weight of cement, it is difficult to show an effective waterproofing function due to the small amount of insoluble crystals, and when the amount is more than 70 parts by weight, the amount of insoluble crystals produced is high, thereby inhibiting the physical properties of the structure. Other reactions, such as insoluble calcium carbonate formation reactions.

Silica sand can be used with an average particle diameter of 1 ~ 2mm, and because the particle size is larger than the silica, it maintains the strength as a structural aggregate in the concrete compared to the fine silica and plays a role of compacting the tissue. In addition, the silica sand serves to provide the silicic acid component necessary to proceed with the reaction to generate insoluble calcium silicate by reacting with the chemical component in the water leaked from the concrete structure, 20 parts by weight or less with respect to 100 parts by weight of cement When used, it is difficult to exhibit structural reinforcing performance, and when used at 200 parts by weight or more, the physical properties of the water repellent may be lowered.

Anhydrous gypsum serves to create insoluble calcium silicate crystals and insoluble calcium carbonate by densifying the structure of the concrete structure during hydration after concrete pouring and providing calcium ions when leakage occurs. 3 weight per 100 parts by weight of cement If it is used less than the amount of calcium silicate and calcium carbonate produced less effective waterproofing function, when used in more than 30 parts by weight of excessively large amount of calcium silicate and calcium carbonate can be reduced the properties of the concrete structure have.

Such a water repellent composition may be mixed with a mortar to be poured into a construction joint, or used in combination with an index plate embedded in a surface of a concrete structure, which is manufactured in a band form as described below, thereby causing leakage through cracks or crevices of the concrete structure. In this case, insoluble crystals grow and play a role in self-healing of cracks, and as the main component, cement, zeolite, sodium carbonate, aluminum sulfate, bentonite, silica sand, silica sand, and anhydrous gypsum are used. It is done.

The crystal growth self-healing index composition according to the present embodiment may be used in a pellet or powder form, and may also be used in the form of a band applied to a nonwoven fabric or a mesh as described below. The powdery water-based composition can be directly mixed with the water-soluble polymer, and may be prepared in a pellet form first and then mixed with the water-soluble polymer so that the water repellency can be effectively exhibited over a long period of time.

In the case of the powder composition, its physical properties are immediately expressed during mixing with concrete, thereby densifying the structure during concrete placement and improving the strength or durability of the concrete structure. If it is manufactured in pellet form and mixed and used during concrete pouring, it does not play its role during mixing, but if there is a crack in concrete joint after concrete pouring, when there is water leakage, etc. As the water-soluble polymer of the pellet is dissolved by the crystal grows to play a role of self-healing the cracks.

That is, the water repellent composition according to the present embodiment has a characteristic of acting even when a crack occurs in the construction joint after concrete pouring, and is manufactured in a band form as described below, and may be applied to joint portions of various types of concrete. .

The above-mentioned water repellent composition can be prepared into a water repellent band by mixing with a water-soluble polymer and then applying the mixture to a nonwoven fabric or a mesh, or extruding and drying to form a band.

The index band is embedded in concrete, so that when Portland cement is combined with water, the calcium hydroxide, which is different in composition, and pozzolan such as silica and alumina are gradually combined with water to produce calcium silicate that is insoluble in water. By densely forming a water curtain, it fills the cracks common in construction joints by itself and serves to block leakage.

As the water-soluble polymer solution used in the preparation of the water index band, polyethylene oxide, polyvinylpyrrolidone, cellulose resin, polyvinyl alcohol, polyvinylacetate, water-soluble epoxy resin, water-soluble silicone resin, water-soluble urethane resin, etc. may be used. Moreover, 10-99 weight part of water can also be mixed and used with respect to 1-90 weight part of water-soluble polymer solutions.

Figure 2 is a flow chart showing a method for producing a water band band according to an embodiment of the present invention. Hereinafter, a process of manufacturing the above-mentioned water-solvent band will be described in detail with reference to FIG. 2.

The index band according to the present embodiment is used to embed in concrete, cement and silica sand of the band material is combined with the mortar serves to form a solid concrete joint with the old and new concrete. The powdery compound inside the band combines with the ionic calcium to form insoluble solid crystals, and the zeolite and bentonite and aluminum sulfate mixture may be prepared in pellet form and mixed with the aforementioned materials.

To this end, first, zeolite and bentonite are mixed in an aqueous solution of aluminum sulfate and then mixed with a water-soluble polymer (S10), and the resulting mixture is extruded, dried and pulverized to prepare a pellet (S20).

Zeolite, bentonite, aluminum sulfate, and a small amount of fatty acid may be stirred in a water-soluble polymer solution, extruded, and dried to form pellets. The powder mixture and pellets made of cement, anhydrous gypsum, and silica sand powder may also be used in a mixed form. have.

For example, with respect to cement and 100 parts by weight of cement, 10 to 50 parts by weight of the pellet, 5 to 20 parts by weight of sodium carbonate, 10 to 30 parts by weight of bentonite having a particle size of 1 to 3 mm, and a silica having a particle size of 100 to 250 μm. 70 parts by weight, 20 to 200 parts by weight of silica sand having a particle diameter of 1 to 3 mm, and 3 to 30 parts by weight of anhydrous gypsum may be mixed and used (S30).

On the other hand, in the mixture consisting of 10 to 60% by weight of zeolite and bentonite, 20 to 60% by weight of aluminum sulfate, and 20 to 70% by weight of high fatty acid powder, a water-soluble polymer consisting of 1 to 90% by weight of water-soluble polymer and 10 to 99% by weight of water You may use it by mixing 1-50 weight part of solutions.

Next, the mixture thus produced and the water-soluble polymer solution are mixed (S40), and the mixture is applied to a nonwoven fabric or a mesh, or extruded, dried and cut to prepare a band form (S50). The water-soluble polymer solution may be applied to the band thus prepared.

As the water-soluble polymer solution, polyethylene oxide, polyvinylpyrrolidone, cellulose resin, polyvinyl alcohol, polyvinylacetate, water-soluble epoxy resin, water-soluble silicone resin, water-soluble urethane resin, etc. may be used as described above. It is also possible to mix and use 10-99 weight part of water with respect to 1-90 weight part of polymer solutions (S42).

On the other hand, the index agent band according to the present embodiment is powdered into fine particles of cement, zeolite, kaolin, activated clay, diatomaceous earth, bentonite and a compound of aluminum sulfate and organic acid and mixed in a predetermined weight ratio, and then water-soluble It can also be manufactured by cutting or applying a thickness of 2 to 25mm to the surface of a nonwoven fabric or sheet by applying an adhesive and cutting it to a width of 10 to 50mm. It can be installed before pouring.

Such a water-proof band can be manufactured in roll form, and serves to fundamentally block leakage by pre-installing the concrete in place of the conventional water plate or bentonite band during concrete joint construction.

Cement component and silica sand powder included in the band between the old concrete and the new concrete are hydrated by embedding the water stopper band according to the present embodiment in the construction joint of the old concrete and placing the new concrete. To improve the adhesion between the concrete to play a role of integration. That is, in the present embodiment, the combination of the other bands and the concrete paste is characterized by the fact that the structural separation does not occur because it is integrated with the concrete by the hydration action, not between the foreign materials.

When the crack occurs as the concrete expands and breaks into the crack or crack of the concrete, bentonite among the components of the water stopper band according to the present embodiment reacts with the intruded water and swells to form a membrane. The composite compound thus formed is in a gel state to absorb and block water, and water and salt adsorbed to the zeolite may form insoluble solid crystals to fill cracks.

In particular, the constituent material of the water-repellent band contains a compound coated with a water-soluble polymer so as not to react and consume all in the general concrete hydration process, so that it does not only perform a general order layer function, but also cracks in concrete afterwards. Even when the crack enters the gap, it reacts again and exhibits order performance. In addition, the constituent material is composed of an organic and inorganic compound compound to react with water in concrete to form insoluble solid crystals, thereby exhibiting the ability to prevent leaks and self-healing cracks.

As described above, the water-repellent composition and the water-repellent band that can be used for the concrete construction joint have been described. Hereinafter, the concrete construction joint structure according to the present embodiment will be described in detail with reference to FIGS. 3 to 5.

This embodiment is to solve the water-resistant, cracks, structural problems, construction difficulties, etc., which are likely to occur in the construction joint of the concrete structure, forming the above-described crystal growth index band and the index plate and metallas part designed in a special form It is characterized by implementing a construction joint structure by combining a dedicated joint hardware.

As such, by using a combination of the water stop band, the water stop plate, and the joining hardware, it is possible to satisfy both the watertight performance and the shrinkage expansion absorption performance required for the concrete construction joint.

In addition, if necessary, in the construction joints that do not require the installation of the index plate, by using the joining hardware (metallas) and the crystal growth type index agent band according to the present embodiment, it is possible to obtain a form role and a waterproof effect on the construction joints. have. In other words, the dedicated joint hardware according to the present embodiment can serve as a die and an index plate as such, and can be used together with a crystal growth index band to prevent defects through crystal growth when leaking, thereby preventing defects. .

3 is a cross-sectional view showing the index plate for the construction joint according to an embodiment of the present invention. Referring to FIG. 3, a water stop band 7, a water stop plate 10, a body 12, a wing 14, and a band groove 16 are illustrated.

The index plate 10 according to the present embodiment is formed in a 'T' shape as a whole, the index by forming the wing 14 and the band groove 16 on both sides on the upper portion of the body portion 12 embedded in the old concrete The band 7 can be easily installed, and serves to fix the fixed band at the installed position without changing the position of the water stop band 7 when new concrete is poured.

That is, the index plate 10 according to the present embodiment is connected to the body portion 12 and the body portion 12 embedded in the old concrete structure, a pair of wings extending along both sides along the connecting surface of the concrete structure Consists of the portion 14 is formed in the overall T-shape.

A pair of wing portions 14 is formed with a band groove portion 16, it is characterized in that it is easy to install the water stop band (7) simply by inserting the water stop band (7) in the band groove portion 16 It is done. As shown in Figure 3, by inserting the water-resistant band (7) in each of the pair of band grooves 16 formed on both sides of the body portion 12 of the water plate 10, a pair of concrete construction joints The water band 7 is provided.

The anti-water band 7 reacts with the water submerged through the construction joints to prevent voids through the growth of crystals. Thus, by installing a pair of anti-water bands 7, the leakage through the construction joints is doubled. You can block. That is, in addition to performing a general order function in the construction joint, even if the crack is generated in the concrete later submerged again, the double-made water-made band 7 can exhibit the order performance again.

Figure 4 is a cross-sectional view showing a joint for construction joints according to an embodiment of the present invention. Referring to FIG. 4, the formwork 5, the index plate 10, the joining hardware 20, the joint groove part 22, and the metal lath part 24 are illustrated.

The joining hardware 20 according to the present embodiment is a form in which metal laths used for corner beads and the like are deformed and tightly formed on the formwork 5 to form a saw-cut on the surface of the structure outside the concrete structure. The joint groove portion 22 is coupled to the inside, and may serve to firmly fix the water discharge plate 10 installed by being bound to the water discharge plate 10 (the wing portion 14).

The joint groove portion 22 for forming the saw cut on the surface of the concrete structure should not be deformed during concrete pouring by being tightly connected to the formwork 5, and the index plate 10 will also be fixed to the joining surface of the middle part in the pouring process. It should not be deformed or repositioned to cope with the expansion of concrete.

To this end, the joining hardware 20 according to the present exemplary embodiment has a structure in which the joint groove 22 and the metal lath 24 are coupled to each other, so that one end of the metal lath 24 has a joint groove 22 formed in the die ( 5) and the other end of the metal lass part 24 serves to hold the index plate 10 is fixed in place exactly, and the metal lass part 24 It can itself serve as a formwork for covering and covering the seam.

As shown in FIG. 4, the joining hardware 20 according to the present embodiment may be manufactured by bending a galvanized steel sheet, and a joint groove part 22 is formed at one side thereof to form a backup material 26a and a sealing material therein. (26b) can be filled, and the other side can be made of an integral piece of metal forming the metal lath portion 24 by spreading a cutting edge.

On the other hand, the joint groove portion 22 according to the present embodiment may be formed by bending the galvanized steel sheet so that the water-proof band 7 can be inserted and installed. That is, a groove is formed on the outer side (concrete surface side) of the joint groove portion 22 so that the filling material, that is, the backing material 26a or the sealing material 26b, is fitted, and the groove is provided on the inner side so that the water-proof band 7 can be installed. It may be manufactured in the form to be formed. When using the joint groove portion 22 of this type to configure the joining hardware 20 according to the present embodiment, it is possible to further install the water stop band (7) in the bent galvanized steel sheet can maximize the waterproof performance. .

The metal lath 24 itself may serve as a formwork for closing the splice surface.

In order to tightly combine new and old concrete in concrete joints, roughness of about 6mm is required, and it is waterproof before construction to strengthen the adhesion between the base material and the waterproofing material and to ensure durability. Mortar or epoxy adhesive may be applied to the concrete surface.

Since the metal lath 24 of the joining hardware 20 according to the present embodiment is formed with irregularities on its surface, the side surface finishing material serves as a formwork for finishing the splice surface when placing the concrete. It is possible to avoid the use of, and by the surface of the ear surface roughness (粗 面) can play a role that the after-concrete is integrated with the sun concrete.

The other end of the metal lath 24 may be coupled to the wing 14 of the index plate 10 using a clip or a binding line, and is applied to the side pressure applied to the metal lath 24 in the process of placing the concrete. To withstand the metal lath 24 may be reinforced with wood or formwork.

For example, as shown in FIG. 4, in the state where the end of the metal lath 24 of the joining hardware 20 is folded and in contact with the wing 14 of the water stop plate 10, a separate groove is made or Without cutting, the joining hardware 20 and the index plate 10 can be joined by fitting into the auxiliary material 11 in the form of a clip made of PVC or iron.

The joining hardware 20 according to the present embodiment is installed so that both ends thereof are connected to the formwork 5 and the index plate 10, respectively, whereby the joint groove portion 22 and the index plate 10 and the formwork 5 are in place. The role of fixing and the concrete paste does not flow out during the process of sun-concrete, it may play a role of maintaining the concrete surface as a rough surface after the casting to integrate with the post-concrete.

After joining the concrete using the joining hardware 20 according to the present embodiment, the mold 5 is demolded, and after the mold 5 is demolded, the joint groove 22 exposed to the surface of the structure is as described above. Likewise, the backup material 26a and / or the sealing material 26b may be filled.

5 is a cross-sectional view showing a concrete construction joint structure according to an embodiment of the present invention. Referring to FIG. 5, there is shown a structure 1, a splice surface 3, a formwork 5, an index band 7, an index plate 10, and a joining hardware 20.

Concrete construction joints, that is, construction joints, are the joints that must occur when the concrete can not be cast at one time in the concrete structure. (Contration Joint) or expansion joint (Expansion Joint) to add the function to form a groove for the adjustment joints to insert the joint groove or to insert the joint filler (Joint Filler) material and then cast concrete.

Concrete shrinks or expands due to the heat of hydration and solar heat generated during curing, and in case of installation of expansion joints or expansion joints in advance in preparation for shrinkage and expansion of such concrete, cracks are induced to such joints. This can prevent the occurrence of random cracks at any position of the structure.

To this end, the index plate 10 may be installed in the concrete construction joint, in the construction joint structure according to the present embodiment bent, molded galvanized steel sheet (joint groove part) in a special shape to fix the index plate 10 in place The water stop plate 10 is fixed by using the 22 and the metal laths 24 as the joining hardware 20, and the water stop plate 10 is inserted into and installed in the water stop plate 10 in duplicate. It is characterized by solving both fixing and waterproofing problems. Such a construction joint structure can be applied to both a structure in which the post-concrete is integrated without a seam and a structure in which a contraction and expansion joint are installed.

The construction joint structure of concrete refers to the portion of the joint where the continuous concrete is to be poured. The vertical joints of continuous retaining walls or slabs, and the horizontal joints of subsequent concrete and subsequent concrete columns or walls Can be mentioned. For example, a construction joint is usually a part of finishing a concrete cast within a day. A concrete construction of a multi-storey building must be finished and cured of the floor slab of one floor before subsequent work for the next floor. In this case, the pouring of the bottom plate is the horizontal joint of the upper wall or column.

In general, in the construction plan for the concrete stroke of building or civil engineering structures, it is said that concrete is poured and then re-placed at a time interval (more than 3 hours) due to adjustment circumstances. The construction joint is a part where the old and new concrete is not completely integrated at the joints, and thus the strength is weakened, and leakage in the waterproof layer and cracking of the finishing material may occur.

On the other hand, the construction joint structure is a joint portion that induces cracks by providing cross-sectional defects in the structure in order to cope with deformation caused by dry shrinkage, external force, etc., shrinkage due to hydration heat, temperature, and humidity. It is difficult to select, there is only a description on the drawing, there is no detailed description, and even in actual construction, there are many problems regarding expansion and contraction, and there are many cracks and leaks due to poor construction.

In this embodiment, by connecting the formwork 5 separately designed in the joint portion of the building or civil engineering structures connected to the formwork (5), the role of the formwork to cover the joint surface (3) and paste leaks during concrete pouring It may serve to prevent coming out, and the part connected to the formwork (5) is to cope with the expansion and contraction of the structure by combining the joint groove (22). In addition, since both ends of the joining hardware 20 can be easily coupled and fixed to the formwork 5 and the index plate 10, the workability can be improved.

That is, in the construction joint according to the present embodiment, in the state in which the formwork 5 is installed to partition the outline of the structure, the joining hardware 20 is coupled to the formwork 5, and the index plate 10 is connected to the joining hardware 20. ) Is made of a binding structure.

The joining hardware 20 is composed of a joint groove 22 and a metal lath 24 connected to the joint groove 22. The joint groove 22 is connected to the formwork 5 to form a structure after casting 1 The saw cut is formed on the surface of the), the metal lath 24 may serve as a formwork for the connecting surface (3) by covering the connecting surface (3).

The index plate 10 includes a body portion 12 embedded in the concrete to be poured, and a pair of wings 14 connected to the body portion 12 and extending to both sides in a T-shape along the joint surface 3. The wing portion 14 is coupled to the above-described joining hardware 20 so that the index plate 10 is fixed in place without being twisted in the concrete pouring process.

A band groove portion 16 is formed in each of the pair of wings 14, and the band groove portion 16 may be inserted into and installed with the above-described water stop band 7. Since the wing portion 14 extends in the form of two wings of the T along the concrete ear surface 3, the water stop band 7 inserted into the band groove 16 is also installed in duplicate along the ear surface 3. Thus, the water penetrating along the joint surface (3) performs a double waterproof function.

The joint groove portion 22 may be manufactured by bending a galvanized steel sheet. The joint groove portion 22 is fixed to the formwork 5 by fastening a screw, and the concrete groove is poured to the portion where the concrete is joined and the concrete is cured. 5) When removing, only the screw part needs to be cut with a cutter. After the formwork 5 is removed, the joint groove part 22 exposed to the surface of the concrete structure 1 may be filled with a compression packing material having a waterproofing agent, and thus, the expansion and expansion joint may be realized.

Compression packing material is a product with elasticity, which facilitates the stretching and contraction of the structure, and the waterproofing agent attached to the compression packing material as an adhesive absorbs the induced water from cracking and flows, thus making a perfect watertight structure. have.

Figure 6 is a flow chart showing a concrete construction joint method according to an embodiment of the present invention. Hereinafter, the construction method for constructing a construction joint structure is demonstrated in detail.

First, the formwork 5 is installed so as to partition the external shape of the structure (P10), and the joining hardware 20 and the index plate 10 are installed along the joining surface 3 (P20). The joining hardware 20 is composed of a joint groove 22 and a metal lath 24 connected thereto. The joint groove 22 is connected to the formwork 5 and the metal lath 24 is connected to the joint surface 3. Cover) and install to act as a formwork (P22).

The joint groove 22 is to replace the process of digging a groove (cut) on the surface of the concrete structure 1, and serves as a cover for inserting the filling material, that is, the backup material 26a or the sealing material 26b. Can be. In addition, the metal lass 24 may be embedded in the precast concrete so that the rough surface is formed on the surface of the old concrete (earring surface 3), thereby allowing the old and new concrete to be completely integrated.

The index plate 10 is a member made of a T-shape as a whole, including a body portion 12 embedded in concrete and a wing portion 14 extending to both sides of the body portion 12 along the connecting surface 3. The unit 14 is installed to be bound to the metal lass 24 described above (P24). As such, by connecting the formwork 5 and the index plate 10 using the joining hardware 20, the joining hardware 20 and the index plate 10 can be fixed in place, with respect to the joint surface (3) If you do not need a separate formwork, it can be finished (3).

Thus, the concrete is placed on one side of the joint surface 3 in the state in which the joining hardware 20 and the index plate 10 are coupled to the formwork 5 (P30). Since the body part 12 of the index plate 10 is a part embedded in concrete, the concrete part is poured on the side where the body part 12 protrudes based on the joint surface 3. Thereby, the index plate 10 (body portion 12) is embedded in the precast concrete, and the joining surface 3 is finished by the metal lath 24, and the joining surface 3 from the formwork 5 is formed. A construction joint structure according to the present embodiment in which the joint groove portion 22, the metal lath portion 24, and the index plate 10 are connected is implemented.

In order to prevent the concrete from losing its function by contacting with the water stopper band during the concrete casting process, the band groove 16 of the water stop plate 10 before hitting the post-casting concrete after the concrete start placing Remove the foreign matters of the band groove portion 16 is inserted into the water stop band (7) is installed (P35).

That is, each of the pair of wings 14 provided in the index plate 10 is formed with a band groove 16, as shown in Figure 5, the band groove 16 is along the connecting surface (3) 2 Since it is arranged in the middle, by inserting and installing the water stop band (7) in the band groove portion 16, the water stop band (7) is installed in double along the joining surface (3), through the joining surface (3) It can perform double waterproof function against immersion.

On the other hand, it is not necessary to use the water stop plate 10 in order to install the water stop band (7), it is horizontal by fixing the water stop band (7) to the connecting surface (3) using a simple fixing hardware such as nails, Alternatively, the water-proof band 7 can be installed in the vertical construction joint portion.

Although FIG. 5 illustrates a vertical construction joint portion in which an index plate is used, the horizontal construction joint portion may be applied to the index agent band without the index plate as described above.

Next, by post-casting the concrete on the other side of the joint surface (3), the concrete joint is completed, it is possible to construct the entire concrete structure by repeating the above-described method for each construction joint.

This embodiment improves the elasticity control function and the workability of the formwork blocking in the construction joint part inevitably generated in the continuous concrete construction, and improves the waterproofing performance on areas with a high risk of leakage. By using the joining hardware 20 and the water stop plate 10 and installing the water stop band 7 in duplicate, effects such as elastic control, form side blocking action, firm fixing, and improvement of waterproof performance can be derived.

In addition, the construction joint according to the present embodiment may also serve as a shrinkage and expansion joint, thereby reducing cracks and beautifying the concrete appearance. Also in terms of workability, the troublesome work of making grooves in the surface of the structure 1 can be omitted only by fixing the joint grooves 22 to the formwork 5, and the backing material having elasticity in the joint grooves 22 ( It is possible to increase the workability by installing 26a), and the joint surface 3 can be finished with the metal lath part 24, so there is no need for a separate side blocking material for the joint surface 3.

The joining hardware 20 is easily combined with the index plate 10 to firmly fix the index plate 10. The index plate 10, which is designed in a special form, is provided with double crystal growth type bands (7) to provide a waterproof defect. It can prevent it beforehand.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. It will be understood that the invention may be varied and varied without departing from the scope of the invention.

1a and 1b are cross-sectional views showing a concrete construction joint portion according to the prior art.

Figure 2 is a flow chart showing a method for producing a water agent band according to an embodiment of the present invention.

Figure 3 is a cross-sectional view showing the index plate for the construction joint according to an embodiment of the present invention.

Figure 4 is a cross-sectional view showing a joint for construction joints according to an embodiment of the present invention.

5 is a cross-sectional view showing a concrete construction joint structure according to an embodiment of the present invention.

Figure 6 is a flow chart showing a concrete construction joint method according to an embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

1: Structure 3: Continuous Surface

5: die 7: water-based band

10: index plate 12: body

14: wing portion 16: band groove portion

20: joining hardware 22: joint groove

24: metal lath

Claims (18)

cement; With respect to 100 parts by weight of the cement, 10 to 30 parts by weight of zeolite; 5 to 20 parts by weight of sodium carbonate; 10 to 30 parts by weight of aluminum sulfate; 10 to 30 parts by weight of bentonite having a particle diameter of 1 to 3 mm; 20 to 70 parts by weight of silica having a particle diameter of 100 to 250 µm; 20 to 200 parts by weight of silica sand having a particle diameter of 1 to 3 mm; And A water repellent composition comprising 3 to 30 parts by weight of anhydrous gypsum in a powder form. The method of claim 1, The silica is an index composition, characterized in that the average particle diameter of 20 to 50㎛. The water repellent band of claim 1, wherein the composition of claim 1 is mixed with a water-soluble polymer solution and the mixture is applied to a nonwoven fabric or a mesh to form a band. The water band of claim 1, wherein the composition of claim 1 is mixed with a water-soluble polymer solution, and the mixture is extruded and dried to form a band. The method according to claim 3 or 4, The water-soluble polymer solution is at least one selected from the group consisting of polyethylene oxide, polyvinylpyrrolidone, cellulose resin, polyvinyl alcohol, polyvinylacetate, water-soluble epoxy resin, water-soluble silicone resin, and water-soluble urethane resin. Exponential band. The method according to claim 3 or 4, 10 to 99 parts by weight of water is further mixed with respect to 1 to 90 parts by weight of the water-soluble polymer solution. (a) mixing zeolite and bentonite in an aqueous aluminum sulfate solution followed by mixing with a water-soluble polymer; (b) extruding the mixture produced from step (a), drying and pulverizing to prepare pellets; (c) 10 to 50 parts by weight of the pellet, 5 to 20 parts by weight of sodium carbonate, 10 to 30 parts by weight of bentonite having a particle size of 1 to 3 mm, and a particle size of 100 to 250 µm with respect to cement and 100 parts by weight of the cement. To 70 parts by weight, 20 to 200 parts by weight of silica sand having a particle diameter of 1 to 3 mm, and 3 to 30 parts by weight of anhydrous gypsum; And (d) a method for producing an index band comprising mixing a mixture produced from the step (c) with a water-soluble polymer solution. The method of claim 7, wherein The step (d) is a method for producing a water repellent band comprising the step of further mixing 10 to 99 parts by weight of water with respect to 1 to 90 parts by weight of the water-soluble polymer solution. The method of claim 7, wherein after step (d), (e1) The method of producing a water repellent band further comprising the step of applying the mixture produced in step (d) to a non-woven fabric or mesh to form a band. The method of claim 7, wherein after step (d), (e2) a method of producing a water repellent band further comprising the step of extruding and drying the mixture resulting from the step (d) into a band form. The method of claim 7, wherein The water-soluble polymer solution is at least one selected from the group consisting of polyethylene oxide, polyvinylpyrrolidone, cellulose resin, polyvinyl alcohol, polyvinylacetate, water-soluble epoxy resin, water-soluble silicone resin, and water-soluble urethane resin. Process for producing water-based bands. A body part embedded in a concrete structure previously constructed; A pair of wings connected to the body part and extending to both sides in a T-shape along the joint surface of the concrete structure; The index plate for the construction joint (construction joint) is formed on the wing portion, and comprising a band groove portion into which the water repellent band of claim 3 or 4. Bonded steel used in construction joints of concrete structures, A joint groove portion connected to the formwork and forming a saw-cut on the surface of the concrete structure; One end is connected to the joint groove, and includes a metal lath that is installed to cover the joint surface of the pre-constructed concrete structure, The other end of the metal las joined to the construction joint, characterized in that the binding to the wing of the index plate of claim 12 provided in the concrete structure. The method of claim 13, After demolding the formwork, the joining iron for a construction joint, characterized in that the filler is filled in the joint groove portion. As a joint structure for joining concrete to form a structure of a predetermined shape, A formwork installed to partition the outer shape of the structure; A pre-placed concrete structure which is constructed in advance and has a surface joined to the surface thereof; A body portion embedded in the concrete structure, a pair of wings connected to the body portion and extending to both sides in a T-shape along the perforated surface, and a pair of bands respectively formed on the pair of wing portions An index plate comprising a groove portion; A pair of water stop bands installed on the joint surface to be inserted into the pair of band grooves, respectively, to block water penetrating along the joint surface; A joint groove portion connected to the formwork and forming a saw-cut on a surface of the concrete structure, one end of which is connected to the joint groove portion and the other end of which is coupled to the wing portion to cover the seaming surface; Concrete construction joint structure including a joining hardware including a metal lath. As a method of forming a structure of a predetermined shape by connecting concrete on the basis of a predetermined seaming surface, Installing a formwork to partition the outer shape of the structure; A joint hardware including a joint groove forming a saw-cut on a surface of the structure and a metal lath having one end connected to the joint groove, wherein the joint groove is connected to the formwork, and the metal las is connected to the formwork. Installing to cover the seam surface; A water plate including a body portion, a pair of wing portions connected to the body portion and extending to both sides in a T-shape along the seaming surface, and a pair of band groove portions respectively formed on the pair of wing portions; And installing the wing to be coupled to the other end of the metal lath; And Concrete construction joint method comprising the step of placing concrete on one side of the connecting surface so that the body portion is embedded. The method of claim 16, After the casting step, concrete construction joint method further comprising the step of installing by inserting a pair of water-resistant band to block the water penetrating along the connecting surface to each of the pair of band grooves. The method of claim 17, After the step of installing the water-based band, concrete construction joint method further comprising the step of pre-cast concrete on the other side of the joint surface.

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