KR100565455B1 - A Method Producing A Anticorrosive Form With Polymer Concrete - Google Patents

Abstract

The present invention relates to a method for manufacturing a polymer concrete formwork, and more particularly, to form a base material of various shapes with a polymer binder and to form a mold to expose a plurality of aggregates on the inner wall of the base material without dismantling the formwork. The present invention relates to a method for producing a polymer concrete anti-corrosive formwork to improve the anticorrosive performance and strength of a building by protecting the member from chloride ions, sulfates and the like. To this end, the present invention comprises the steps of preparing a polymer binder by mixing a main material, an initiator, a curing agent, molding a formwork base material of a rectangular hollow tube shape having a constant thickness and continuous by a predetermined length with the polymer binder, the base material Impregnating a plurality of aggregates into an inner wall of the, applying a coagulation retardant liquid to the inner wall, curing the base material for a period of time, and applying a high pressure water to the inner wall so that a portion of the aggregate is exposed to the outside. Spinning to remove the coagulation retardant liquid and a portion of the inner wall and combing the inner wall of the base material with a brush.

Polymer, Concrete, Formwork, Anticorrosion, Aggregate, Initiator, Curing Agent, Thermal Polymerization

Description

A Method Producing A Anticorrosive Form With Polymer Concrete

1 is a flow chart related to a method for producing a polymer concrete formwork according to the present invention,

Figure 2a is a partial cross-sectional view of the base material showing a state where the coagulation delay liquid is applied,

FIG. 2B is a partial cross-sectional view illustrating a state in which a solidification retardation liquid and a portion of an inner wall of the base material are removed from the base material shown in FIG. 2A;

3 is a configuration diagram of the formwork produced by the method shown in FIG.

<Description of Symbols for Major Parts of Drawings>

10: base material 20: aggregate

30: coagulation retardant liquid 100: formwork

The present invention relates to a method for manufacturing a polymer concrete formwork, and more specifically, by forming a hollow tube-like base material such as rectangular, circular, ellipse with a polymer binder, and manufacturing a form to expose a plurality of aggregates on the inner wall of the base material The present invention relates to a method for producing a polymer concrete anti-corrosive formwork which improves the anticorrosive performance and strength of a building by protecting the main members of a building from chloride ions or sulfates without removing the formwork.

In general, cement concrete is easy to construct because it uses cement, has advantages in durability and economical efficiency, and is widely used in various civil engineering and construction fields.

However, the concrete is weak in frost resistance, chemical resistance and water resistance, and has disadvantages such as shrinkage, corrosion, adhesion, neutralization or corrosion of reinforcing bars due to the penetration of chloride ions. In particular, such durability problems are more apparent in poor environments such as piers, offshore and underground structures, so it is inappropriate to use conventional cement concrete for such structures.

In the construction of such cement concrete, formwork supporting the shape of the concrete is required while the concrete is cured.

Therefore, the production cost of the formwork, production time and installation time is required, and even when dismantling requires a considerable time and manpower has a problem of increasing the construction cost and air.

In addition, if the formwork is removed, there is a problem that a crack occurs due to temperature change and drying shrinkage on the concrete surface.

In addition, although concrete using various composite materials has been developed to supplement the disadvantages of the conventional cement concrete as described above, this also has a problem that the formwork is not necessarily overcome by using the formwork.

The present invention has been made in order to solve the above problems, the first object of the present invention is to form the formwork with the polymer concrete, by using it integrally with the member without demoulding to secure the excellent anticorrosive performance of the polymer concrete, bending It is to provide a method of manufacturing polymer concrete formwork that can be used for marine structures by supplementing various strength characteristics including strength.

In addition, the second object of the present invention, as a precast factory product form the assembly of the factory after manufacturing the site immediately after construction by the construction site can be maintained in a clean state and can shorten the air of the polymer concrete formwork manufacturing method To provide.

In addition, the third object of the present invention, there is no formwork demoulding to suppress the cracks caused by the drying shrinkage of the concrete generated during the demoulding, and to reduce the cost of formwork construction, the production of polymer concrete formwork that can reduce the overall construction cost To provide a way.

Objects of the present invention as described above, the step of preparing a polymer binder by combining a main material, an initiator, a curing agent (S1000);

Molding a formwork base material having a rectangular hollow tube shape having a predetermined thickness and continuous by a predetermined length with the polymer binder (S2000);

Impregnating a plurality of aggregates on the inner wall of the base material (S3000);

Applying a coagulation retardant liquid to the inner wall (S4000);                         

Curing the base material for a predetermined period of time (S5000);

Radiating high pressure water toward the inner wall such that a portion of the aggregate is exposed to the outside to remove the coagulation retardant liquid and a portion of the inner wall (S6000); And

Combing the inner wall of the base material with a brush (S6100); can be achieved by.

In S1000, methyl methacrylate (MMA) is blended as a main material of the polymer binder, azobis isobutyronitrile is blended as an initiator, and dimethyl aniline is used as a curing agent. It is preferable to mix.

In the above formulation, it is preferable that the methyl methacrylate is blended at a ratio of 97 wt%, the azobisisobutyronitrile is added at a ratio of 2 wt% and the dimethylaniline at a ratio of 1 wt%.

In addition, in the step S3000, it is preferable to impregnate the dried moisture content less than 0.3%.

Other objects, obvious advantages and novel features of the present invention will become more apparent from the following detailed description and the preferred embodiments according to the accompanying drawings.

Next will be described in detail with the accompanying drawings with respect to the method for producing a polymer concrete formwork according to the present invention.

1 is a flow chart related to a method for producing a polymer concrete formwork according to the present invention. As shown in FIG. 1, first, a process of manufacturing a binder for binding aggregate 20, etc. is required when manufacturing concrete. In a general construction site, cement is used as a binder, but in the present invention, aggregate is used using a polymer (20). ), Etc.

Such a polymer binder is prepared by blending a main material, an initiator, and a curing agent in an appropriate ratio. In this Example, the main material was metal methacrylate, the initiator was azobisisobutyronitrile, and the curing agent was dimethylaniline.

Here, the metal methacrylate is used as the main material of the polymer binder, which has a low viscosity compared to the adhesive properties of other concrete compositions, and thus has good workability, evenly mixing the compositions, ensuring uniform strength, and curing time even at low temperatures. By shortening the process period can be reduced, even if the amount of resin of the binder can be reduced to produce a good quality, because it can bring the cost saving effect by reducing the expensive binder.

In addition, the combination of the materials results in 97 wt% of metal methacrylate, 2 wt% of azobisisobutyronitrile and 1 wt% of dimethylaniline. And a filler can be added and used here. The filler is a calcium carbonate, fine silica powder, fly ash and the like used to increase the binder to improve workability.

The materials added in such an appropriate amount will be made of a polymer binder by thermal polymerization.

However, the material is not limited to the above materials, and different materials may be used. For example, the main material may be an epoxy resin, an unsaturated polyester resin containing polystyrene, a vinyl ester resin, a furan resin, or the like. In order to improve the properties of the polymer concrete, additives such as an antifoaming agent, a diluent, a flexible agent, a shrinkage reducing agent, a sunscreen agent, a fireproofing agent and an adhesion enhancer may be additionally added depending on the application to which the polymer is applied (S1000).

The polymer binder is molded to form a form of rectangular hollow tube formwork 10 having a constant thickness and continuous by a predetermined length. In more detail, the formwork base material 10 has a cross-sectional shape, such as pillars, beams, walls, etc. that require formwork among members of a building, and inserts concrete and reinforcing bars into the interior. It is configured to be drilled except for a certain length of border. The width of the border will be about 5 ~ 7cm in consideration of the thickness of the general formwork, but is not limited to this, but also differently formed according to the conditions of the use or place where the formwork 100 is manufactured according to the present invention is applied. It is possible.

The hollow rectangular cross section is continuously produced corresponding to the length of the pillar, beam, etc. to be constructed in the field. Therefore, the formwork base material 10 is manufactured by standardizing the dimensions of each member of the structure to use the formwork 100 according to the present invention and manufacturing a mold according to the dimensions to fill a polymer binder in the mold. (S2000).

A plurality of aggregates 20 are impregnated on the inner wall of the molded base material 10. Impregnation allows the aggregate 20 to be completely submerged in the inner wall, and the number per square meter may be selectively calculated according to the purpose of construction. And, the aggregate 20 is used to dry the moisture content less than 0.3% in order to prevent the weakening of the interfacial adhesion with the polymer binder (S3000).

Thereafter, a coagulation retardant liquid 30 is applied to the inner wall. That is, the surface of the polymer binder impregnated with a plurality of aggregates 20 is applied with the liquid 30. This is to minimize the crack or the gap between the aggregate 20 and the polymer binder by impregnating a plurality of aggregates 20 because the polymer binder has a property of curing quickly.

If cracks occur in the permanent formwork manufactured according to the present invention, salt and the like may penetrate into the concrete and reinforcing bars constructed in the formwork 100, thereby weakening the structure. It is necessary to close the gap between the (20) and the polymer binder (S4000).

The base material 10 coated with the liquid 30 is cured for a predetermined period of time. The time required for curing is less than the curing time of cement concrete. For example, when polymer concrete is hardened using formwork, it can be demolded within 1 to 3 hours after casting. Therefore, it can be seen that the base material 10 according to the present invention also has a hardness enough to allow on-site construction if it has a curing time of about 3 hours.

However, the present invention sprays water with a strong hydraulic pressure toward the inner wall so that a portion of the aggregate 20 is exposed to the outside before the base material 10 is completely cured, and the solidification retardation liquid 30 and a predetermined portion of the inner wall. Since it requires a step of removing it is preferable to cure about 1 to 2 hours.

Since the curing time can be controlled in a wide range depending on the amount of the initiator or initiator added, it is possible to modify and use it according to the use of the building or the environment of the site (S5000).

After curing for a certain period of time, a strong water pressure is sprayed toward the inner wall of the base material. As a result, not only the coagulation delay liquid applied to the base material is washed off but also a part of the inner wall surface of the base material is washed off. Therefore, a part of the aggregate that has been impregnated is exposed to the outside.

In addition, by combing the inner wall with a brush or the like after spraying water it is possible to more smoothly work to allow a part of the aggregate 20 is derived from the inner wall.

Exposing the aggregate 20 to the outside as described above is to improve the adhesion of the concrete and the formwork 100 when placing concrete on the formwork 100 completed according to the present invention (S6000, S6100).

Through this process, formwork 100 corresponding to a column, beam, wall, etc. may be produced, and the formwork 100 may be combined to manufacture a building according to a design purpose.

FIG. 2A is a partial cross-sectional view of the base material 10 showing a state in which the coagulation retardant liquid 30 is applied, and FIG. 2B is a view of the inner wall of the liquid 30 and the base material 10 in the base material 10 of FIG. 2A. It is a partial sectional view which shows the state which removed the part. As shown in FIG. 2A, the molded polymer binder is impregnated so that a plurality of aggregates 20 are completely submerged, and a coagulation retardant liquid 30 is applied thereon.

Aggregate 20 is impregnated so as to impregnate evenly in the base material 10 because it is impregnated to increase the bonding force with the concrete poured in the base material (10).

The coagulation retardation liquid 30 is applied to prevent cracking of the base material 10 that may occur due to the incorporation of the aggregate 20 and to reduce the gap with the aggregate 20, thereby solidifying the polymer binder constituting the base material 10. It acts to prolong time.

In FIG. 2B, the aggregate 20 is exposed on the surface of the base material 10. This is obtained by spraying water of strong pressure on the base material 10 to which the liquid 30 shown in FIG. 2A is applied and combing with a brush. Thus exposed aggregate 20 is to increase the bonding force with the concrete when the concrete is poured into the completed formwork (100).

3 is a configuration diagram of the formwork 100 produced by the method shown in FIG. As shown in FIG. 3, the formwork 100 has a rectangular and hollow cross section, and a plurality of aggregates 20 are exposed therein while the cross sections are continuously formed, and the aggregate 20 shown in FIG. 2B is exposed. ) Is the same as that formed by extending a partial cross-sectional view of the exposed base material (10).

In more detail, the polymer binder is molded by the method shown in FIG. 1 to form the mold base material 10, and the coagulation delay liquid 30 is impregnated with the aggregate material 20 impregnated in the base material 10. Apply. After that, the water is sprayed with strong water pressure and the brush is combed to the inner wall of the base material 10 so that a part of the impregnated aggregate 20 is exposed to the inside.

The completed formwork 100 will be manufactured according to the purpose of use (that is, whether it is used for a pillar or a beam, etc.) at the time of initial manufacture. Therefore, the formwork 100 is installed according to the design of the building, and the necessary reinforcing bars are laid inside the formwork 100. After the concrete is poured, the intended structure can be completed.

In the method of manufacturing a polymer concrete formwork according to the present invention as described above, the present invention produced the formwork 100 in the shape of a rectangular hollow tube, but is not limited to this, triangular, pentagonal, oval, circular, hexagonal or octagonal as needed. It is possible to manufacture as described above, it is also possible to produce a formwork 100, such as pillars, beams by making a mortar or bolted in the field by making a rectangular flat unit, that is, a block-shaped unit.

In addition, since the main material, the initiator and the curing agent of the polymer binder can be replaced with other materials well known in the art, it may be selectively used in consideration of construction cost or convenience of material purchase.

In addition, the base material 10 is impregnated with a plurality of aggregates 20 only on the inner wall, but it is also possible to implement the present invention by impregnating the outer wall surface. This will allow construction in various ways, such as to form a rectangular hollow tube-shaped formwork 100 to correspond to the adjacent formwork 100 and the outer wall to form a mortar or the like.

According to the manufacturing method of the polymer concrete anti-corrosive form according to the present invention as described above, by forming the form of the polymer concrete and use it integrally with the member without demoulding to secure the excellent anti-corrosion performance of the polymer concrete, and complement various strength characteristics including bending strength It is effective.

Therefore, the formwork produced according to the present invention has no fear of corrosion by chloride ions, sulfates, ions, and more robust and durable marine structures (eg, harbors, harbors, breakwaters, lighthouses, etc.), underground structures, etc. It is possible to build.

In addition, according to the present invention, the formwork can be manufactured in the factory, and then assembled at the site immediately after construction, so that the construction site can be kept clean and the air is shortened.

In addition, since there is no formwork demoulding, it is possible to suppress the cracks caused by the drying shrinkage of the concrete generated during the demoulding, and to reduce the formwork cost, thereby reducing the construction cost.

Although the invention has been described with reference to the preferred embodiments mentioned above, many other possible modifications and variations can be made without departing from the spirit and scope of the invention. Accordingly, the appended claims are intended to cover such modifications and variations as fall within the true scope of the invention.

Claims (7)

In the manufacturing method of formwork of concrete, Preparing a polymer binder by combining a main material, an initiator and a curing agent (S1000); Molding the formwork base material 10 having a rectangular hollow tube shape having a predetermined thickness and continuing by a predetermined length with the polymer binder (S2000); Impregnating a plurality of aggregates (20) on the inner wall of the base material (10) (S3000); Applying a solidification retardant liquid (30) to the inner wall (S4000); Curing the base material 10 for a predetermined period of time (S5000); And Radiating high pressure water toward the inner wall to expose a portion of the aggregate 20 to the inner wall to remove the coagulation retardant liquid 30 and a predetermined thickness of the inner wall (S6000). Polymer concrete formwork production method. The method according to claim 1, wherein in the step S1000, methyl methacrylate (MMA) as a main material of the polymer binder. 3. The method of claim 2, wherein in the step S1000, azobisisobutyronitrile as an initiator of the polymer binder. 4. The method of claim 3, wherein in the step S1000, dimethylaniline is included as a curing agent of the polymer binder. The method of claim 4, wherein in step S1000, the methyl methacrylate is combined at a ratio of 97 wt%, the azobisisobutyronitrile is added at a ratio of 2 wt% and the dimethylaniline at a ratio of 1 wt%. Polymer concrete formwork manufacturing method characterized in that. The method of claim 1, wherein in the step S3000, the method of producing a polymer concrete anti-corrosion mold, characterized in that the impregnated with the aggregate (20) dried to less than 0.3%. The method of claim 1, wherein after the step S6000, further comprising the step of combing the inner wall of the base material (10) with a brush (S6100).

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