KR102428389B1 - Crack repair material composition of concrete structure and crack repair method of concrete structure using the same - Google Patents

Abstract

According to the present invention, disclosed are a crack repair material composition of a concrete structure and a crack repair method of a concrete structure using the same. The crack repair material composition comprises 43 to 53 parts by weight of calcium carbonate, 22 to 32 parts by weight of water, 14 to 24 parts by weight of styrene-butadiene rubber, 8 to 18 parts by weight of plazasulfuron, 1 to 10 parts by weight of kerosene, 1 to 10 parts by weight of titanium dioxide, 0.1 to 4 parts by weight of hydroxyethyl cellulose ether, and 0.1 to 4 parts by weight of benzophenone.

Description

Crack repair material composition of concrete structure and crack repair method of concrete structure using the same

The present invention relates to a crack repair material composition for a concrete structure and a crack repair method for a concrete structure using the same.

In general, the outer wall of concrete structures cracks as the structure's construction, internal and external temperature difference, drying shrinkage, and lifespan elapse according to changes in the outdoor environment such as seasonal changes, and cracks occur. Of course, maintenance is required.

The type of concrete crack repair method is a surface treatment method that forms a coating film on a large fine crack (width less than 0.2mm). There is a filling method that fills the crack, and an injection method that installs an injection pipe at an interval of 10 to 30 cm in the crack and injects a resin-based or cement-based material.

Among them, the filling method is mainly applied when the cracks are large enough to cause water leakage or to affect the aging of reinforcing bars and concrete. The upper elastic putty is deeply filled.

However, when this conventional crack repair method is applied to repair cracks on the outer wall of a concrete structure such as an apartment house, the crack repair material is vulnerable to external environmental changes such as weathering and deterioration. As the adhesive force (coupling force) is weakened, cracks occur again and there is a problem in that it falls off easily.

The background art or prior art described herein is information possessed by the inventor or acquired in the process of deriving the present invention, and is only intended to help understand the technical meaning of the present invention, and prior to the filing of the present invention, the technology to which this invention belongs This does not mean that the technology is widely known in the field.

The present invention can easily repair cracks occurring on the outer wall of a concrete structure such as an apartment house, and also prevent lifting and dropping due to a decrease in the bonding strength of the crack repair material, thereby stably maintaining a good condition. The main object is to provide a protective finishing composition.

In addition, another object of the present invention is to improve the mechanical strength of the coating film formed through the finishing material composition of the present invention and to improve the waterproofness.

On the other hand, the technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned are clearly to those of ordinary skill in the art to which the present invention belongs from the description below. can be understood

The crack repair material composition of a concrete structure according to an embodiment of the present invention,

43 to 53 parts by weight of calcium carbonate;

22 to 32 parts by weight of water;

14 to 24 parts by weight of styrene-butadiene rubber;

Plaza Sulfuron 8 to 18 parts by weight;

1 to 10 parts by weight of kerosene

1 to 10 parts by weight of titanium dioxide

0.1 to 4 parts by weight of hydroxyethyl cellulose ether and

0.1 to 4 parts by weight of benzophenone; may include.

On the other hand, the coating film construction method according to the embodiment of the present invention is

A) forming a V-groove by digging a cracked portion of the outer wall of the concrete structure to a certain depth;

B) forming at least two fixing grooves facing each other with respect to the center of the V-groove;

C) inserting a rod into the fixing groove;

D) mutually fastening the rods inserted into each of the at least two fixing grooves facing each other;

E) filling the V-groove with a crack repair material; may include.

In addition,

The crack repair material is

43 to 53 parts by weight of calcium carbonate;

22 to 32 parts by weight of water;

14 to 24 parts by weight of styrene-butadiene rubber;

Plaza Sulfuron 8 to 18 parts by weight;

1 to 10 parts by weight of kerosene

1 to 10 parts by weight of titanium dioxide

0.1 to 4 parts by weight of hydroxyethyl cellulose ether and

0.1 to 4 parts by weight of benzophenone;

may include.

In addition, in the direction of gravity, the fixing groove may have an upward slope.

In addition, the step B) is,

B-1) expanding the diameter of the inner end of the fixing groove;

B-2) inserting an adhesive member into the inner end of the fixing groove having an enlarged diameter; including,

In step C),

The rod may be inserted into the fixing groove so that one end of the rod comes into contact with the adhesive member.

In addition, in the step B-1), after installing the explosive at the inner end of the fixing groove, the explosive may be exploded to expand the diameter of the inner end of the fixing groove.

In addition, the rod may include a hard metal or a hard plastic.

In addition, in the step D), the other end of the adjacent rod is fastened to each other,

The other end of the fastened rod may apply a downward force downward.

According to an embodiment of the present invention, it is possible to easily repair cracks occurring on the outer wall of a concrete structure such as an apartment house, and to prevent lifting and dropping due to a decrease in the bonding strength of the crack repair material to stably maintain a good state. It is possible.

On the other hand, the effects obtainable in the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those of ordinary skill in the art to which the present invention belongs from the description below. will be able

1 to 9 are exemplary views sequentially showing a painting method for surface protection of a concrete structure according to an embodiment of the present invention.

Hereinafter, an embodiment of the present invention will be described in more detail with reference to the accompanying drawings. Embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be construed as being limited to the following embodiments. This embodiment is provided to more completely explain the present invention to those of ordinary skill in the art. Accordingly, the shapes of elements in the drawings are exaggerated to emphasize a clearer description.

The configuration of the invention for clarifying the solution of the problem to be solved by the present invention will be described in detail with reference to the accompanying drawings based on a preferred embodiment of the present invention, but the same in assigning reference numbers to the components of the drawings For the components, even if they are on different drawings, the same reference numbers are given, and it is noted in advance that the components of other drawings can be cited when necessary in the description of the drawings.

The finishing composition for surface protection of a concrete structure of the present invention contains 43 to 53 parts by weight of calcium carbonate, 22 to 32 parts by weight of water, 14 to 24 parts by weight of styrene-butadiene rubber, 8 to 18 parts by weight of plazasulfuron, and 1 to 10 parts by weight of kerosene. parts, 1 to 10 parts by weight of titanium dioxide, 0.1 to 4 parts by weight of hydroxyethyl cellulose ether, and 0.1 to 4 parts by weight of benzophenone.

43 to 53 parts by weight of calcium carbonate may function as an inorganic filler, and is added to increase the strength and durability of the coating film, and to increase heat resistance, fire resistance, and hiding power.

Styrene-butadiene rubber 14 to 24 parts by weight is a material with waterproof properties and high elongation. If it is outside the set range, the elongation and waterproof properties cannot be expected.

8 to 18 parts by weight of Plaza Sulfuron may hinder the growth of plants in crack repair materials.

1 to 10 parts by weight of kerosene functions as an antifoaming agent, and an antifoaming agent is a component used to improve the strength and appearance of crack repair materials by removing large pores in crack repair materials. Surfactants may be used.

1 to 10 parts by weight of titanium dioxide is also called titania powder, and is generally used as a water-based paint because of its excellent hiding power. An improvement in the strength of the coating film can be expected with the addition of titanium dioxide.

0.1 to 4 parts by weight of hydroxyethyl cellulose ether functions as a thickener, and the thickener may increase the viscosity of the crack repair material.

0.1 to 4 parts by weight of benzophenone functions as a photoinitiator, and the photoinitiator may be activated by natural light or ultraviolet light after the crack repair material coating film is formed.

On the other hand, the crack repair method of the concrete structure of the present invention will be described with reference to FIGS. 1 to 8. The crack repair method of the concrete structure of the present invention is A) A cracked part of the outer wall of the concrete structure Digging to a predetermined depth to form a V-groove; B) forming at least two fixing grooves facing each other with respect to the center of the V-groove; C) inserting a rod into the fixing groove; D) mutually fastening the rods inserted into each of the at least two fixing grooves facing each other; and E) filling the V-groove with a crack repair material; may include.

First, in the step of (A) forming a V-groove by digging a cracked portion of the outer wall of the concrete structure to a certain depth, dig a cracked portion of the outer wall (W) of the concrete structure to a certain depth to create a V-groove. A groove (10) is formed.

1 and 2, using a tool such as an electric drill (D), dig around the crack (C) part of the outer wall (W) in a V-CUTTING method to form a V-shaped groove do.

Meanwhile, although not shown, it is possible to prevent scattering of concrete fragments and dust by forming the V-groove 10 in a state in which a scattering prevention device (not shown) is in close contact with the outer wall W of the concrete structure.

B) In the step of forming at least two fixing grooves opposite to each other based on the center of the V groove, a plurality of fixing grooves 20 are formed by making holes of a certain depth in the diagonal direction on both sides of the V groove 10 . .

That is, at least two fixing grooves 20 are formed obliquely on both inner walls of the V-groove 10 opposite to each other by using a tool such as an electric drill D as shown in FIG. 3 .

Here, in the fixing groove 20 , the inner valley faces upward in the direction of gravity, and the fixing groove 20 may have an upward inclination θ outward from the center CL of the V groove 10 .

At this time, it is possible to prevent the scattering of concrete fragments, dust, and cement dust by forming the fixing groove 20 in a state in which the scattering prevention device is in close contact with the outer wall W of the concrete structure as described above.

In addition, in step B), it is possible to remove the concrete fragments and various foreign substances remaining in the V-groove 10 and the fixing groove 20.

That is, the insides of the V-groove 10 and the fixing groove 20 are brushed away or sprayed with high-pressure water or compressed air to remove foreign substances and clean them.

In addition, in step (B), it is possible to expand the diameter of the inner end (trough) 40 of the fixing groove (20).

In one example, referring to FIGS. 4 and 5 , after installing the small explosive 30 at the inner end (trough) of the fixing groove 20, it explodes and the inner end (goal) of the fixing groove 20 ( 40) can be expanded.

Thereafter, referring to FIG. 5 , the adhesive member 50 may be inserted into the inner end (trough) 40 of the fixing groove 20 having an enlarged diameter.

The adhesive member 50 may be composed of a liquid adhesive such as epoxy.

That is, the diameter of the inner end (trough) 40 of the fixing groove 20 can be expanded to provide a space in which the adhesive member 50 can be accommodated, and when a rod to be described later is inserted, the adhesive member 50 . It can provide a space in which to flow without leaking to the outside.

Then, referring to FIG. 6 , C) in the step of inserting the rod into the fixing groove, one end of the rod 61 can be inserted until the adhesive member 50 touches the inner end (valley) of the fixing groove 20 . have. Here, as in the shape of the fixing groove 20 , the rod 61 has one end of the rod 61 facing upward in the direction of gravity, and the rod 61 is upwardly outward from the center CL of the V groove 10 . It may have a slope (θ). On the contrary, the other end of the rod 61 faces the center CL of the V-groove 10 and may have a downward inclination θ inward.

Here, the rod 61 may be made of hard metal or plastic and must be able to withstand the downward force applied to the rod 61 later.

D) In the step of mutually fastening the rods inserted into each of the at least two fixing grooves facing each other, the other ends of the at least two rods 61 and 62 having a directional inclination toward the center CL of the V groove 10 are mutually connected. can be contracted

Here, the other ends of the two rods 61 and 62 may be fastened together through the fastening member 63 , and movement may be restricted from the center CL of the V-groove 10 to the outside.

Through this, the mutually fastened rods (61, 62) may have a downward force (F) downward.

Thereafter, referring to FIG. 9 , in the step of E) filling the crack repair material in the V groove, the crack repair material 70 is filled in the V groove 10 .

That is, as shown in FIG. 9 , the crack repair material 70 is injected into the V-groove 10 at a low or high pressure using a syringe or the like to be completely filled, dried naturally, and sufficiently hardened.

And after the crack repair material 70 is hardened, a finishing operation may be performed to have a flat surface with the outer wall W.

For example, the rough part may be flattened using a work tool such as a chisel or a grinder.

Here, the mutually fastened rods 61 and 62 have a downward force F to the lower side, so that when the crack repair material is hardened in the V groove 10, it serves to firmly hold the crack repair material so that it is tightly adhered to the inner wall. .

Here, the crack repair material 70, as in the above-described embodiment, 43 to 53 parts by weight of calcium carbonate, 22 to 32 parts by weight of water, 14 to 24 parts by weight of styrene-butadiene rubber, 8 to 18 parts by weight of plaza sulfuron, kerosene 1 to 10 parts by weight, 1 to 10 parts by weight of titanium dioxide, 0.1 to 4 parts by weight of hydroxyethyl cellulose ether, and 0.1 to 4 parts by weight of benzophenone may be included.

This elastic crack repair material 70 responds stably to climate or temperature changes due to high adhesion and high elasticity, excellent waterproofness, weather resistance, chemical resistance, flexibility, etc. can be blocked

Meanwhile, the strength of the crack repair material 70 can be further strengthened and movement and separation can be prevented by adding a mesh-type mesh to the V-groove 10 before the crack repair material is injected.

In addition, the bonding strength of the crack repair material 70 can be improved by coating the primer in the V-groove 10 before the crack repair material is injected.

As such, in the crack repair method of the concrete structure according to the embodiment of the present invention, there is no lifting and dropping of the crack repair material 70 due to the decrease in the adhesiveness of the repair part, so that the re-crack does not occur after the crack repair, so it is semi-permanent with one-time construction Not only can the maintenance condition be stably maintained, but the durability of the concrete structure can be increased because the crack part of the outer wall (W) does not expand.

Here, of course, the crack repair method of a concrete structure according to an embodiment of the present invention can be applied to various concrete structures such as an apartment, a house, an exterior wall of a factory, and a window frame.

The above detailed description is illustrative of the present invention. In addition, the above description shows and describes preferred embodiments of the present invention, and the present invention can be used in various other combinations, modifications, and environments. That is, changes or modifications are possible within the scope of the concept of the invention disclosed herein, the scope equivalent to the written disclosure, and/or within the scope of skill or knowledge in the art. The written embodiment describes the best state for implementing the technical idea of the present invention, and various changes required in specific application fields and uses of the present invention are possible. Accordingly, the detailed description of the present invention is not intended to limit the present invention to the disclosed embodiments. Also, the appended claims should be construed to include other embodiments as well.

Claims (8)

Calcium carbonate 43 to 53 parts by weight
22 to 32 parts by weight of water;
14 to 24 parts by weight of styrene-butadiene rubber;
Plaza Sulfuron 8 to 18 parts by weight;
1 to 10 parts by weight of kerosene
1 to 10 parts by weight of titanium dioxide
0.1 to 4 parts by weight of hydroxyethyl cellulose ether and
0.1 to 4 parts by weight of benzophenone;
Crack repair material composition of a concrete structure comprising a.
A) forming a V-groove by digging a cracked portion of the outer wall of the concrete structure to a certain depth;
B) forming at least two fixing grooves facing each other with respect to the center of the V-groove;
C) inserting a rod into the fixing groove;
D) mutually fastening the rods inserted into each of the at least two fixing grooves facing each other;
E) filling the V-groove with a crack repair material; Crack repair method of a concrete structure comprising a.
3. The method of claim 2,
The crack repair material is
Calcium carbonate 43 to 53 parts by weight
22 to 32 parts by weight of water;
14 to 24 parts by weight of styrene-butadiene rubber;
Plaza Sulfuron 8 to 18 parts by weight;
1 to 10 parts by weight of kerosene
1 to 10 parts by weight of titanium dioxide
0.1 to 4 parts by weight of hydroxyethyl cellulose ether and
0.1 to 4 parts by weight of benzophenone;
Crack repair method of a concrete structure comprising a.
3. The method of claim 2,
In the direction of gravity, the fixing groove is a crack repair method of a concrete structure having an upward slope.
4. The method of claim 3,
Step B) is,
B-1) expanding the diameter of the inner end of the fixing groove;
B-2) inserting an adhesive member into the inner end of the fixing groove having an enlarged diameter; including,
In step C),
Crack repair method of a concrete structure in which the rod is inserted into the fixing groove so that one end of the rod is in contact with the adhesive member.
6. The method of claim 5,
The step B-1) is a crack repair method of a concrete structure in which an explosive is installed at the inner end of the fixing groove, and then the explosive is exploded to expand the diameter of the inner end of the fixing groove.
7. The method of claim 6,
The rod is a crack repair method of a concrete structure comprising a hard metal or hard plastic.
8. The method of claim 7,
In step D), the other ends of the neighboring rods are fastened to each other,
The other end of the fastened rod is a crack repair method of a concrete structure having a downward force.

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