KR100801423B1 - Compositions mixed with nano-composed inorganic polymer and nylon fiber for repairing and reinforcing sections of concrete constructions, and repairing and reinforcing method using it thereof - Google Patents

Abstract

A composition for repairing and reinforcing the section of a concrete structure using a nano-composed inorganic polymer and nylon fibers is provided to realize the same quality as concrete materials and long-term durability, and to improve the cracking and bending resistance, tensile strength and adhesion. A composition for repairing and reinforcing the section of a concrete structure using a nano-composed inorganic polymer and nylon fibers comprises: 100 parts by weight of cement; 200-230 parts by weight of a functional mineral substance formed of ore belonging to amphibole; 6-10 parts by weight of a nano-composed inorganic polymer; 0.1-0.5 parts by weight of nylon fibers; and 40-60 parts by weight of water. The nano-composed inorganic polymer comprises: 16-50 parts by weight of a silane compound; 5-20 parts by weight of distilled water or ion exchange water; 7.5-20 parts by weight of a solvent; 10-30 parts by weight of silica sol; 0.1-10 parts by weight of an acid catalyst; 0.1-1.0 parts by weight of a thickening agent; 20-30 parts by weight of a filler; 24-26 parts by weight of an acrylic emulsion resin; 5-17 parts by weight of ethyl alcohol; and 0.1-10 parts by weight of nanopowder of silica or aluminum hydroxide. Further, the acid catalyst is one selected from a group consisting of HCl, HNO3 and CH3COOH.

Description

Compositions mixed with nano-composed inorganic polymer and nylon fiber for repairing and reinforcing sections of concrete constructions, and repairing and reinforcing method using it according to

1 is a conceptual diagram according to the present invention

Figure 2 is an exemplary view showing a hydrogen bonding model with concrete hydrate according to the present invention

Figure 3 is an exemplary view showing the results of microstructure identification and fiber mixing mortar of the test piece on the electron scanning electron microscope

Figure 4 is an exemplary view showing the change over time of salinity penetration depth of each specimen with the immersion time elapsed

5 is an exemplary view showing the neutralization penetration depth results of each test specimen obtained through the accelerated neutralization test.

Figure 6 is an illustration showing the test results after the freeze thaw test for each test body

7 is an exemplary view showing the weight change rate according to the age of the test specimen immersed in 5% sulfuric acid solution

The present invention relates to a cross-sectional reinforcement composition for a concrete structure in which a nano-synthetic inorganic polymer and nylon fibers are mixed, and to a cross-sectional reinforcement method using the same. The present invention relates to a cross-sectional reinforcement composition for a concrete structure containing nano-synthetic inorganic polymers and nylon fibers that can prevent salt and contamination and enhance durability when applying reinforcement to a cross-section, and a cross-sectional reinforcement method using the same.

In general, factors affecting the durability of concrete structures include material conditions, use of the structure, and outdoor environmental conditions. Among these, external and outdoor environmental conditions include repeated wet and dry by moisture, salt damage due to salt penetration, Neutralization of concrete due to the penetration of carbon dioxide, freeze-thawing due to severe changes in outside temperature, and chemical erosion by erosion of various acids.

Due to such deterioration factors, cracks, leaks, reinforcing bars, peeling, peeling, etc. occur in concrete structures. In other words, moisture or other harmful substances penetrate into the concrete, causing the concrete itself to deteriorate, or causing corrosion of reinforcing steel, which causes performance degradation of the concrete structure. And it is necessary to prevent the penetration of external harmful substances and the like to reinforce the cross section.

To this end, various cross-sectional reinforcement and repair methods have been developed to prevent the deterioration of concrete structures and to restore the performance of deteriorated concrete. To this end, cross-sectional reinforcement and renovation works are carried out for many new concrete structures. There is.

However, most existing reinforcing and repairing materials lose their original function due to the long term repetition of deterioration factors and the difference in material properties. Even if the material is not localized, the economic burden of the user is increased, and the environmental load is discharged to cause environmental pollution, there were various problems.

The present invention is to solve the above problems, the object is to provide a homogeneous with the concrete material, and the composition for the maintenance of the concrete structure cross-sectional reinforcement of the nano-synthetic inorganic polymer and nylon fibers with long-term excellent durability and It is to provide a section repair reinforcement method using the same.

In addition, another object of the present invention is to provide micropores on the surface of the concrete structure by the inorganic polymer synthesized at the nano-level, to block the deterioration factor having a large ion size.

Another object of the present invention is to mix the nano-synthetic inorganic polymer and nylon fibers to improve the cracks, warpage and tensile strength, improve the adhesion, and to suppress the shrinkage cracking composition for concrete structure cross-section reinforcement composition and the cross section using the same It is to provide a reinforcement method.

The present invention is based on 100 parts by weight of cement, 200 to 230 parts by weight of functional minerals containing minerals belonging to the hornblende group as aggregates, 6 to 10 parts by weight of nanosynthetic inorganic polymers, 0.1 to 0.5 parts by weight of nylon fibers and 40 to water. It consists of 60 parts by weight.

The functional mineral is a mineral belonging to the group of hornblende containing calcium, sodium, potassium, magnesium, iron, aluminum, hydroxyl groups, fluorine and the like, and has a particle size of 25 mm to 150 nm.

The functional mineral is a functional eco-friendly material that is beneficial to vegetation and human body by releasing large amounts of far infrared rays, anions, mineral acids, etc. in itself, and may be a factor affecting durability depending on the size of particles. And stability.

The nano-synthetic inorganic polymer is 16 to 50 parts by weight of silane compound, 5 to 20 parts by weight of distilled or ion-exchanged water, 7.5 to 20 parts by weight of solvent, 10 to 30 parts by weight of silica sol, 0.1 to 1.0 parts by weight of acid catalyst, thickener It consists of 0.1-1.0 weight part, 20-30 weight part of fillers, 24-26 weight part of acrylic emulsion resins, 5-17 weight part of ethyl alcohol, and 0.1-10 weight part of nanopowders.

That is, the nano-synthetic inorganic polymer is 16 to 50 parts by weight of the silane compound, 5 to 20 parts by weight of distilled or ion-exchanged water, 7.5 to 20 parts by weight of the solvent, 10 to 30 parts by weight of the silica sol, and 0.1 to 1.0 parts by weight of the acid catalyst. After reacting by mixing 0.1 to 1.0 parts by weight of thickener, 20 to 30 parts by weight of filler, 24 to 26 parts by weight of acrylic emulsion resin, 5 to 17 parts by weight of ethyl alcohol, and 0.1 to 10 parts by weight of nanopowder are produced. In this case, 0.15 to 0.25 parts by weight of an antifoaming agent and 2 to 8 parts by weight of a water repellent may be further added.

The silane compound is tetramethoxysilane, tetraethoxysilane, methyltrimethoxysilane, methyltriethoxysilane, methyltriisopropoxysilane, phenyltrimethoxysilane, phenyltriethoxysilane, dimethyldimethoxysilane At least one compound selected from the group consisting of dimethyldiethoxysilane, diphenyldimethoxysilane, diphenyldiethoxysilane, methylphenyldimethoxysilane, or combinations thereof.

The solvent is at least one alcohol-based material selected from the group consisting of methyl alcohol, ethyl alcohol, isopropyl alcohol and the like.

The acid catalyst is added one selected from HCl, HNO ₃ , CH ₃ COOH.

The filler is added at least one selected from the group consisting of titanium oxide, iron oxide, chromium oxide, zinc oxide, silicon oxide.

The nano-powder is synthesized at the nano-level to use a nano-silica powder or a nano aluminum hydroxide powder having a powder degree of 50 ~ 150nm. When the powder degree is less than 50 nm, there is a problem that the adhesion force is lowered because the pore amount is increased, and when the powder degree is more than 150 nm, excessively fine, weathering and cracking may occur.

In addition, the thickener is to enhance a predetermined viscosity, and uses a known thickener that is currently commercially available. In addition, the antifoaming agent and the water repellent are not particularly limited, and these may also be well-known ones that are widely sold on the market.

When the inorganic polymer made as described above is applied to the concrete structure as shown in FIG. 1 for cross-sectional repair / reinforcement, it is configured in the form of chemical bonds integrated with the concrete matrix, and it is breathable due to the three-dimensional network structure And the like.

Hereinafter, looking at the synthesis mechanism of the nano-synthetic inorganic polymer to help the understanding of the present invention.

In other words, the nanosynthetic inorganic polymer is formed from monomer to oligomer and polymer through hydrolysis and polymerization using a starting material called metal alkoxide, as shown in the following equation. Through the polymerization process, an inorganic polymer structure is formed.

① Hydrolysis reaction (M: metal, R: alkyl group)

M (OR) n + XH ₂ O → M (OH) x (OR) n-x + ROH

② polycondensation reaction ⇒ 3-dimensional network structure

: -M-OH + H-OM → -MO-M + H ₂ O (dehydration reaction)

: -M-OH + R-O-M → -M-O-M + ROH (dealcohol reaction)

As described above, the alkoxy silane nanosynthetic inorganic polymer synthesizes a low molecular weight inorganic polymer through hydrolysis and polymerization at the nano level.

In addition, the nano-synthetic inorganic polymer as described above is a structure capable of directly hydrogen bonding with a hydrate such as CSA (Calcium Silicate Aluminate) or CSH (Calcium Silicate Hydrate) in concrete. Since it forms a structure, it is basically insoluble in water, exhibits superhydrophobicity after drying, and can block the diffusion of water, and thus has the advantage of maintaining a compound form between copper materials having excellent adhesion in the long term.

In addition, the nano-synthetic inorganic polymer penetrates into the concrete structure during filling and coating the composition of the present invention will have micropores, the micropores are deterioration factor (Cl ^- 3.68) having a larger ion size than (1 ~ 2Å). _{Å, H 2 O: 2.8Å,} CO 2 -: will have the property that can essentially block the 4.4Å).

That is, as shown in Figure 2, the nano-synthetic inorganic polymer is a low-molecular-weight inorganic polymer synthesized through hydrolysis and polymerization at the nano-level, such as the direct hydration reaction of CSA or CSH in concrete cement hardened body Hydrogen bonds are formed by chemical reactions integrated with each other, thereby forming an inorganic three-dimensional network structure (-O-Si-O-), thereby forming micropores of about 1 to 2Å in the concrete microstructure. The formation of such micropores is a crystal structure that releases the moisture inside to the outside and at the same time has the most ideal air permeability, thereby allowing stable bonding without peeling of the coating film in the long term.

At this time, the R group of FIG. 2 is an alkyl group, and exhibits water repellency to serve as a barrier to external moisture or harmful substances, and the penetration of the inorganic polymer increases the concrete microporous structure to increase surface hardness.

The nylon fiber is added to improve cracks, warpage, and tensile strength and to suppress shrinkage cracking, and nylon fibers containing 4 to 5% of moisture are used. The nylon fiber containing 4 to 5% of moisture serves to provide moisture when cement is hydrated, thereby increasing the bonding strength with cement unlike other synthetic fibers, and as a result, has the effect of inhibiting shrinkage cracking of mortar. Doing.

Limitation of the upper limit and the lower limit of each component of the present invention as described above is to consider the reaction with other additives, it is limited in order to have excellent physical properties pursued by the present invention.

Hereinafter, the present invention will be described in detail by way of examples.

Example 1

30 parts by weight of tetra methoxysilane, 15 parts by weight of distilled water, 15 parts by weight of ethyl alcohol, 18 parts by weight of silicazol, 1.0 part by weight of HNO _3, 1.0 part by weight of a thickener are reacted, and 20 parts by weight of silicon oxide acrylic emulsion resin 30 10 parts by weight of ethyl alcohol, 8 parts by weight of nano aluminum hydroxide powder, 0.25 parts by weight of an antifoaming agent, and 3 parts by weight of a water repellent were mixed to form a nano-synthetic inorganic polymer,

100 parts by weight of cement, 200 parts by weight of a functional inorganic material consisting of minerals belonging to the hornblende group as aggregates, 10 parts by weight of nanosynthetic inorganic polymers, 0.5 parts by weight of nylon fibers, and 60 parts by weight of water were mixed and applied to a concrete test body. Scanning electron microscopy (SEM) observation of the concrete test body was carried out, and it observed at 500 times and 5000 times magnification with respect to the coating surface and the cross section. After the application of the composition of the present invention 14 days after the specimen was taken, the specimen was observed at 500 magnification with respect to the surface of the coating surface as an evaluation site, and the evaluation of the penetration site by splitting the surface perpendicular to the coating surface to change the structure of the cross-section 500 Observations were made at magnification and 5000 magnification. The result is shown in FIG. 3.

Figure 3 shows the results of microstructure identification and fiber mixing mortar of the test piece on the electron scanning electron microscope, (a) is a test body without coating, (b) is a test body to which the present invention composition is applied, the present invention composition In the case of the coated specimen, the concrete hydration structure was found to be changed more densely than that of the non-coated one.

As the microstructure progresses in densification and uniform fiber distribution, moisture ingress from the outside is suppressed, which makes it difficult to infiltrate and diffuse chlorine ions or CO ₂ gas, which is the cause of the concrete deterioration from the outside, thereby improving the deterioration resistance of the concrete. It is considered that the crack resistance of mortar can be greatly increased.

Example 2

As in Example 1, each component was blended and applied to a concrete test body, and the salt penetration resistance test was performed, and this was compared with an untreated test body and a test body coated with a general synthetic fiber.

In the salt penetration test, the test body was immersed in a 10% NaCl solution for 28 days, and then the time change of the chloride ion penetration depth was measured by the silver nitrate titration method, and the result is shown in FIG. 4.

Figure 4 shows the change over time of the salinity penetration depth of each specimen with the immersion time, the final salinity depth after 18 days immersion, 18.47 mm in the untreated, 7.15 mm in the general synthetic fiber, the composition of the present invention In the case of reinforcing treatment, it measured 1.27 mm. Compared to the untreated test specimens, the salt penetration resistance of the test specimens subjected to the general synthetic fiber reinforcement was very large, and in particular, the test specimens to which the present invention was applied showed very little salt penetration.

That is, the test specimens of the present invention showed a 90% or more salt permeation reduction effect compared to the untreated specimens, and the salt permeation permeability was reduced by 50% or more, compared to the general synthetic fibers, and showed excellent resistance to salt permeation.

Example 3

As in Example 1, each component was blended and applied to a concrete test body, and a neutralization test was performed on it, and this was compared with an untreated test body and a test body coated with a general synthetic fiber.

The neutralization test was carried out for 35 days using an accelerated neutralization test apparatus, and the neutralization depth was measured by spraying a 1% solution of phenolphthalene on the splitting surface at the end of the test. The result is shown in FIG.

Figure 5 shows the results of the neutralization penetration depth of each test specimen obtained through the accelerated neutralization test. It can be seen that the neutralization depth is significantly reduced when the reinforcement is applied as compared to the untreated specimen. When accelerated neutralization was carried out for 35 days, the neutralization depth was measured to be 10.5 mm for no treatment (a), 5.8 mm for general synthetic fiber coating (b) and 1.0 mm for treatment with the present invention composition (c).

Example 4

As in Example 1, each component was blended and applied to a concrete test body, and a freeze-thawing resistance test was performed, and this was compared with an untreated test body and a test body coated with a general synthetic fiber.

The freeze-thawing test was repeated 300 times +4 ℃ ~ -18 ℃ temperature cycle by KS F 2456, the relative dynamic modulus was measured each time at a predetermined number of times. The result is shown in FIG.

Fig. 6 shows the test results after the freeze-thawing test for each test body. As a result of repeating freeze-thawing of 300 cycles, the relative dynamic modulus was 53.2% for an untreated test specimen and a test article coated with a general synthetic fiber (aqueous epoxy clock). In the case of 74.7%, the inorganic polymer system (composition of the present invention) was 92% of the specimens coated. As a result of the freeze-thawing test, the relative dynamic modulus at 300 cycles must be more than 60% to prevent the concrete from freezing. In the case of no treatment, the relative elastic modulus was 300% in 300 cycles, which is lower than the above standard.However, when the reinforcing agent was applied, all the elastic modulus exceeded 60%. In the case of the coated specimen, the dynamic elastic modulus hardly decreases even at 300 cycles, indicating excellent copper resistance.

   The reason why the present material has excellent freeze resistance is that freezing thawing is mainly due to the movement of water and the freeze-expansion pressure action of moving water, and thus, it is judged to be due to the water blocking effect due to the material properties of the composition of the present invention.

Example 5

As in Example 1, each component was blended and applied to a concrete test specimen, and a chemical erosion resistance test was performed on it, and this was compared with an untreated test specimen and a test specimen coated with a general synthetic fiber.

The chemical erosion resistance test measured the change in mass of the concrete specimen while immersed in 5% solution of H2SO4, a strong acid for 12 days.

Figure 7 shows the weight change rate according to the age of the test specimen immersed in 5% sulfuric acid solution. After immersion for 12 days, the weight change rate was +6 to -4% in the case of no treatment, and the weight change rate was +4 to -4% in the case of treatment with general synthetic fiber (aqueous epoxy clock). Surface treatment with an inorganic polymer (invention) showed a stable weight change in the range of +2 to -2%.

Example 6

A nanosynthetic inorganic polymer was produced as in Example 1, and each component was combined to form a test body as shown in Table 1 below, and then the compressive strength thereof was evaluated.

At this time, the compressive strength is measured for the test body carried out with the composition for cross-section repair / reinforcement of known polymer synthetic fibers for the physical evaluation of the test body of concrete, and the test body carried out with the present invention composition in which the nano-synthetic inorganic polymer and nylon fiber are mixed. The results are shown in [Table 2].

In addition, the test body was manufactured using a cubic mold of 5 cm × 5 cm × 5 cm, the compressive strength test is measured the maximum load using a compressive strength tester of 100 TON according to the compressive strength test method of KS L 5105 hydraulic cement mortar It was.

Table 1

[Table 2]

As shown in [Table 2], the compressive strength measurement according to each type shows the compressive strength of about 50kgf / ㎠ at 3 days of the initial age, and after 7 days the compressive strength of the test body carried out with the composition of the present invention It can be seen that the appearance is higher than the general synthetic fiber mortar.

In addition, the compressive strength of the test body with the composition of the present invention on the 28th day expresses 300 kgf / cm 2 or more, and the test body made of general synthetic fiber expresses 284 kgf / cm 2 or more.

These values exceed those of 200 kgf / cm 2, the compressive strength level of polymer cement mortars presented by various institutions in Japan, and the compressive strength is expected to continue to increase at a later age.

Example 7

As in Example 6, each component was combined to form a test body, and then flexural strength thereof was evaluated.

At this time, the flexural strength was measured for the test body made of a composition for reinforcing the cross-section repair of a known polymer synthetic fiber for the physical evaluation of the test body of concrete and the test body made of the composition of the present invention in which the inorganic polymer and the nano-synthetic nylon fiber were mixed. The results are shown in [Table 3].

In addition, the test body produced a test specimen of 4 cm × 4 cm × 16 cm, the flexural strength test was measured using a compressive strength meter of 100 TON at each age.

Table 3

As shown in [Table 3], the bending strength measurement results showed a similar tendency to the compressive strength measurement results, and the bending strengths of the test specimen of the general synthetic fiber mortar and the test specimen of the present invention were similar.

Age 14 days bending strength was expressed about 60kgf / ㎠, 28 days bending strength was found to continue to increase to 87kgf / ㎠ in the case of the present invention in which the nano-synthetic inorganic polymer and nylon fibers are mixed.

Hereinafter, a cross-sectional recovery method using the cross-sectional repair reinforcing composition of the present invention will be described.

The present invention provides a surface treatment step of removing foreign matters on the concrete structure, the step of applying the composition for the cross-sectional maintenance reinforcement for applying and filling the composition for the cross-sectional maintenance reinforcement to the surface-treated portion, the composition and the composition for the cross-sectional maintenance reinforcement After the surface protection material coating step of applying a surface protection material, and the surface protection material is applied to the finishing treatment step of finishing with a coating material.

The surface treatment step is to remove the coating material from the surface concrete caused by aging phenomena such as salting, neutralization (carbonation), chemical corrosion, etc., exposure to aggregate aggregates, concentration of water droplets, rust contamination, lifting and corrosion. Completely remove the concrete surface using a tool such as a grinder.

The cross-sectional reinforcement composition coating step is based on 100 parts by weight of cement, 200 to 230 parts by weight of functional minerals consisting of minerals belonging to the hornblende group as aggregates, 6 to 10 parts by weight of nano-synthetic inorganic polymers, and 0.1 to 0.5 parts by weight of nylon fibers. Part and 40 to 60 parts by weight of water, by using the composition for the cross-sectional repair reinforcement, the composition for the cross-sectional repair reinforcement is applied one or more times at a time of about 0.8 to 3.0 cm at a time by hand polishing or the like.

The surface protective material coating step and the finishing treatment step are applied to the surface of the cross-sectional maintenance reinforcement composition applied using a known surface protective material and coating material, respectively.

The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

As described above, the present invention is a nano-synthetic inorganic polymer and nylon fibers are mixed, when applied to the cross-sectional recovery of the concrete structure, the breathability at the nano-level is secured, the cracking effect is large due to the improvement of adhesion force, Hair is not exposed, and it has excellent characteristics of surface repair and reinforcement by blocking deterioration factor.

In addition, it has ductility to suppress the brittle fracture of concrete, workability is good and does not affect the color.

In addition, the present invention has excellent durability, such as strength strength and resistance to deterioration and abrasion of the concrete matrix, and for slab, walkway, road, etc. for shotcrete, tunnel and ground fixing, building reinforcement, etc. It can be applied to firewalls, pollutant tanks, and the like. It is also applicable to pipes, water pipes, and architectural products for precast.

In addition, the present invention can be developed for various purposes, such as coastal structures susceptible to salt damage, underground structures in contact with the groundwater surface, to enhance the durability of the interior / exterior walls of concrete structures exposed to various air pollution, etc. The effect is very large.

In addition, since the present invention has a functional inorganic is added, it has a function of absorbing far-infrared radiation and blocking the toxicity of the cement and absorbing electromagnetic waves, thereby enabling a pleasant living environment and safe life protection.

Claims (11)

delete Per 100 parts by weight of cement, 200-230 parts by weight of functional minerals consisting of minerals belonging to the hornblende group as aggregates, 6 to 10 parts by weight of the nano-synthetic inorganic polymer, 0.1 to 0.5 parts by weight of nylon fiber, and 40 to 60 parts by weight of water, The nano-synthetic inorganic polymer is 16 to 50 parts by weight of silane compound, 5 to 20 parts by weight of distilled or ion-exchanged water, 7.5 to 20 parts by weight of solvent, 10 to 30 parts by weight of silica sol, 0.1 to 1.0 parts by weight of acid catalyst, thickener 0.1 to 1.0 parts by weight, 20 to 30 parts by weight of filler, 24 to 26 parts by weight of acrylic emulsion resin, 5 to 17 parts by weight of ethyl alcohol, and 0.1 to 10 parts by weight of nanosilica powder or nano aluminum hydroxide powder. Nanocomposite inorganic-based polymer and nylon fibers are mixed in the cross-section repair reinforcement composition. The method of claim 2; The nano-synthetic inorganic polymer is synthesized through hydrolysis and polymerization reaction, the composition for the concrete structure cross-sectional reinforcement containing the nano-synthetic inorganic polymer and nylon fibers, characterized in that the powder having 50 ~ 150nm. The method of claim 2; The silane compound is tetramethoxysilane, tetraethoxysilane, methyltrimethoxysilane, methyltriethoxysilane, methyltriisopropoxysilane, phenyltrimethoxysilane, phenyltriethoxysilane, dimethyldimethoxysilane , Dimethyl diethoxy silane, diphenyl dimethoxy silane, diphenyl diethoxy silane, methylphenyl dimethoxy silane, or at least one compound selected from the group consisting of a combination thereof, nano-synthetic inorganic polymer and nylon fibers are mixed Concrete structure cross-section reinforcement composition. The method of claim 2; Wherein the solvent is methyl alcohol, ethyl alcohol, isopropyl alcohol nanocomposite inorganic polymer, characterized in that at least one alcohol-based material selected from the group consisting of a composition for the concrete structure cross-sectional reinforcement incorporating nylon fibers. The method of claim 2; The acid catalyst is HCl, HNO ₃ , CH ₃ COOH nanostructured inorganic polymer and characterized in that the nylon fiber is mixed, the cross-sectional composition reinforcement composition, characterized in that one selected from the group consisting of. The method of claim 2; The filler is a composition for repairing the cross-section of a concrete structure containing nano-synthetic inorganic polymer and nylon fibers, characterized in that at least one selected from the group consisting of titanium oxide, iron oxide, chromium oxide, zinc oxide, silicon oxide. The method of claim 2; The nano-synthetic inorganic polymer is a composition for repairing the cross-section of a concrete structure in which the nano-synthetic inorganic polymer and nylon fibers are mixed, wherein an antifoaming agent and a water-repellent agent are further added. The method of claim 2; The nylon fiber is a composition for repairing the cross-section reinforcement of the concrete structure containing the nano-synthetic inorganic polymer and nylon fibers, characterized in that containing 4 to 5% water. A surface treatment step of removing foreign matter on the concrete structure; And a step of applying a composition for repairing a cross-section reinforcement to the surface-treated portion and applying a composition for repairing a cross-section; A surface protective material applying step of applying a surface protective material after applying and filling the cross-sectional reinforcement composition; After applying the surface protective material is made of a finishing treatment step of the coating material, The cross-sectional reinforcement composition applying step is a cross-sectional reinforcement method using a nano-composite inorganic polymer and nylon fiber composite cross-sectional reinforcement composition, characterized in that for applying the composition for the cross-sectional reinforcement according to claim 2. The method of claim 10; The cross-sectional repair reinforcement composition is a cross-sectional reinforcement method using a nano-composite inorganic polymer and nylon fiber composite cross-sectional repair reinforcement composition, characterized in that the coating is applied once 0.8 ~ 3.0 ㎝.

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