KR102338598B1 - Quick-hardening and ultra-early strength type cement concrete composition having high ductility modified by acrylic latex-based modifier and reinforcing and repairing method of road pavement using the same - Google Patents

Abstract

The present invention relates to an ultra-fast hardening and high early strength type high ductility cement concrete composition modified by an acrylic latex-based modifier, and a road pavement maintenance and reinforcement method using the same. According to the present invention, the composition comprises 10 to 40 wt% of a functional binder, 10 to 50 wt% of fine aggregate, 5 to 40 wt% of coarse aggregate, 0.1 to 10 wt% of mixing water, and 0.1 to 10 wt% of an acrylic latex-based modifier. The functional binder includes, with respect to on 100 parts by weight of high early strength Portland cement, 20 to 40 parts by weight of calcium sulfoaluminate, 10 to 30 parts by weight of gypsum, 10 to 30 parts by weight of barium titanate, 1 to 10 parts by weight of sericite, 1 to 10 parts by weight of polyaniline nanofiber, 0.1 to 5 parts by weight of clinoptilolite, and 0.1 to 5 parts by weight of zinc phosphate. The acrylic latex-based modifier includes, with respect to 100 parts by weight of an ethylene-methyl acrylate-methacrylic acid copolymer, 50 to 80 parts by weight of a bisphenol A epoxy resin, 30 to 60 parts by weight of dimer acid, 10 to 40 parts by weight of butadiene rubber latex, 1 to 20 parts by weight of acrylate-styrene-acrylonitrile latex, and 1 to 20 parts by weight of a silane coupling agent. Accordingly, bending, tensile, and adhesion strength are greatly increased and initial hydration of cement and densification of tissue are promoted to produce airtight concrete, thereby preventing cracking and expansion destruction caused by shrinkage of the concrete, greatly increasing abrasion resistance and waterproofness, suppressing corrosion of the concrete by neutralization and chloride, and increasing freeze-thaw resistance according to temperature change.

Description

The high-toughness cement concrete composition of the ultra-fast and crude steel type modified with an acrylic latex modifier and the road pavement maintenance method using the same {Quick-hardening and ultra-early strength type cement concrete composition having high ductility modified by acrylic latex-based modifier and reinforcing and repairing method of road pavement using the same}

The present invention not only prevents cracks and expansion fractures due to shrinkage of concrete, but also prevents cracks and expansion fractures due to shrinkage, tensile strength, and adhesion strength being greatly improved, and by promoting initial hydration of cement and densification of tissue to produce airtight concrete, High toughness of ultra-fast and crude steel type modified with an acrylic latex modifier that can significantly improve abrasion resistance and waterproofness, suppress corrosion of concrete by neutralization and chloride, and improve freeze-thaw resistance according to temperature changes It relates to a cement concrete composition and a road pavement maintenance method using the same.

In general, on concrete pavement roads, the bearing capacity of the pavement is lowered due to the spongy phenomenon occurring under the pavement layer due to the expansion and contraction and expansion of the pavement according to the temperature change, and the pavement layer is cracked or cracked due to vehicle load, etc. This happens frequently. In addition, when cracks occur in the concrete pavement layer, rainwater penetrates through the cracks and the damaged part of the road expands rapidly and the cracks progress due to the load of vehicles running on the road, so prompt repair is required.

In such a concrete pavement, it is advantageous to remove the damaged part and repair it with a road pavement repair method such as repaving, but it is advantageous in terms of the durability of the repair part, but also for the repaved road, the original paved part and the repaired part are treated under the same conditions. It is not possible to do this, so there is a problem such as a level difference between the existing road and the repaired repavement part, giving an impact to a moving vehicle. Therefore, there was a problem in that the passage of vehicles must be restricted for a certain period of time.

In order to solve this problem, it was attempted to realize rapid strength development using super-velocity cement. However, super-velocity cement has a higher heat of hydration than normal Portland cement, and microcracks are easy to occur due to drying shrinkage and internal stress remaining inside the structure. There was a problem that could adversely affect the stability of the concrete structure. In addition, super-velocity cement has high water permeability, so that chloride or moisture permeation occurs, which causes concrete to corrode easily, or because it has weak water resistance, frost resistance, and long-term durability, it has to be re-repaired even after repair.

The use of latex-modified concrete in which SBR (styrene-butadiene rubber) latex is added to concrete repair and reinforcement work to supplement the above problems is described in Korean Patent No. 421255.

In the case of using SBR latex to manufacture the modified super-velocity concrete according to the above-described contents, the freeze-thaw stability in winter was poor, and when the temperature rose the following year, the surface peeling of the concrete was severe. This phenomenon is caused by poor waterproofness and chloride resistance of SBR latex, and there is still a limit to guarantee the durability of concrete.

Republic of Korea Patent Registration No. 10-1242729 Republic of Korea Patent No. 10-1710300 Republic of Korea Patent Registration No. 10-2189147

The present invention has been devised to solve the above problems, and an embodiment of the present invention can reduce the number of traffic designated according to vehicle control and promote the convenience of the driver, and prevent cracking and expansion destruction caused by the shrinkage of concrete. Not only can it prevent, but also improve abrasion resistance, waterproofness, neutralization, chloride and freeze-thaw resistance, thereby extending the durable life of the structure and reducing maintenance costs. An object of the present invention is to provide a high toughness cement concrete composition and a road pavement maintenance method using the same.

Various problems to be solved by the present invention are not limited to the above-mentioned problems, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

An embodiment of the present invention contains 10 to 40% by weight of a functional binder, 10 to 50% by weight of fine aggregate, 5 to 40% by weight of coarse aggregate, 0.1 to 10% by weight of mixing water, and 0.1 to 10% by weight of an acrylic latex-based modifier, and ;

The functional binder is based on 100 parts by weight of crude Portland cement, calcium sulfoaluminate 20 to 40 parts by weight, gypsum 10 to 30 parts by weight, barium titanate 10 to 30 parts by weight, sericite 1 to 10 parts by weight, polyaniline nanofiber 1 to 10 parts by weight, 0.1 to 5 parts by weight of clinoptilolite, and 0.1 to 5 parts by weight of zinc phosphate;

The acrylic latex-based modifier is based on 100 parts by weight of the ethylene-methyl acrylate-methacrylic acid copolymer, 50 to 80 parts by weight of bisphenol A type epoxy resin, 30 to 60 parts by weight of dimer acid, 10 to 40 parts by weight of butadiene rubber latex , An acrylate-styrene-acrylonitrile latex 1 to 20 parts by weight and 1 to 20 parts by weight of a silane coupling agent to provide a high toughness cement concrete composition modified with an acrylic latex-based modifier and crude steel type.

The polyaniline nanofibers are prepared by mixing a 0.01 to 0.8 M aniline solution with a 0.5 to 3 M acidic solution to prepare an acidic aniline solution; adding a 0.001 to 0.1 M ammonium persulfate solution to the acidic aniline solution, followed by polymerization to form polyaniline nanofibers; dialyzing the polyaniline nanofiber-formed solution with a hydrochloric acid solution having a pH of 2.5 to 3.5 to remove unreacted monomolecules and salts, and then dialyzing with distilled water to lower the acid concentration; and diluting the polyaniline nanofibers after the dialysis has been completed by adding distilled water, followed by ultrasonic pulverization to separate the polyaniline nanofibers aggregated in distilled water, and filtering and washing them.

After diluting by adding distilled water to the dialysis-finished polyaniline nanofibers, before ultrasonic pulverization, 0.01 to 0.1 mg/mL of a spider silk hydrolyzate is added and mixed under the conditions of pH 5.5 to 7.5, and the surface of the polyaniline nanofibers is hydrolyzed by spider silk. further performing the step of treating with the decomposition product;

The hydrolyzate of the spider silk is prepared by a manufacturing method comprising the steps of hydrolyzing the spider silk with hydrochloric acid of 5 to 20 times the weight and 0.5 to 8N, and concentrating the hydrolyzate under reduced pressure, followed by freeze-drying and powdering. can

The acrylic latex-based modifier is based on 100 parts by weight of the ethylene-methyl acrylate-methacrylic acid copolymer, 0.1 to 5 parts by weight of hydroxyapatite sol, 0.1 to 5 parts by weight of tetraacetyl oxyresveratrol represented by the following Chemical Formula 1, and It may further include 0.1 to 5 parts by weight of epigallocatechin gallate.

[Formula 1]

the hydroxyapatite sol is a Si-containing hydroxyapatite sol;

The Si-containing hydroxyapatite sol is prepared by dissolving tetraethyl orthosilicate (TEOS) and triethyl phosphate (TEP) in ethyl alcohol to prepare a TEOS-TEP solution; hydrolyzing the TEOS-TEP solution by titrating the prepared TEOS-TEP solution with hydrochloric acid at a concentration of 0.1 to 0.5N to a pH of 1 to 3, followed by stirring; Dissolving calcium nitrate tetrahydrate (CNT) in ethyl alcohol to prepare a CNT solution; mixing by dropping the hydrolyzed TEOS-TEP solution in the same volume ratio to the prepared CNT solution; And it may be prepared by a method comprising the step of stirring the mixture.

In addition, another embodiment of the present invention is a road pavement maintenance method using the high-toughness cement concrete composition of the super-velocity and crude steel type modified with the acrylic latex-based modifier,

removing latance and impurities by cutting and blasting the road surface using a crusher, a planer, or a shot blaster; cleaning the removed area; maintaining a wet state by sprinkling water on the cleaned area; After maintaining a wet state, the step of brooming or primer treatment in order to obtain high adhesion and waterproof effect; pouring a high-toughness cement concrete composition of the super-velocity and crude steel type modified with the acrylic latex-based modifier on the top treated with bruising or primer; spraying curing agent to prevent initial plastic cracking by preventing evaporation of moisture from the upper part after pouring; Tying to increase crack induction and slip resistance after curing agent spraying; And it provides a road pavement maintenance method comprising the step of curing.

According to the high-toughness cement concrete composition of super-velocity and crude steel type modified with an acrylic latex modifier according to an embodiment of the present invention and a road pavement maintenance method using the same, bending, tensile and adhesion strength are very improved, and the cement By promoting initial hydration and tissue densification, it is possible to manufacture tightly sealed concrete, which has the effect of preventing cracks and expansion fractures caused by the shrinkage of concrete. In addition, it can greatly improve abrasion resistance and waterproofness, suppress the corrosion of concrete by neutralization and chloride, and improve the freeze-thaw resistance according to temperature changes, thereby extending the durable life of the structure and reducing maintenance costs. there is an effect In addition, the curing speed is greatly improved, which has the effect of reducing the traffic designated according to vehicle control and promoting the convenience of the driver.

Hereinafter, embodiments of the present invention will be described in detail. However, this is provided as an example, and the present invention is not limited thereto, and the present invention is only defined by the scope of the claims to be described later.

An embodiment of the present invention contains 10 to 40% by weight of a functional binder, 10 to 50% by weight of fine aggregate, 5 to 40% by weight of coarse aggregate, 0.1 to 10% by weight of mixing water, and 0.1 to 10% by weight of an acrylic latex-based modifier, and ;

The functional binder is based on 100 parts by weight of crude Portland cement, calcium sulfoaluminate 20 to 40 parts by weight, gypsum 10 to 30 parts by weight, barium titanate 10 to 30 parts by weight, sericite 1 to 10 parts by weight, polyaniline nanofiber 1 to 10 parts by weight, 0.1 to 5 parts by weight of clinoptilolite, and 0.1 to 5 parts by weight of zinc phosphate;

The acrylic latex-based modifier is based on 100 parts by weight of the ethylene-methyl acrylate-methacrylic acid copolymer, 50 to 80 parts by weight of bisphenol A type epoxy resin, 30 to 60 parts by weight of dimer acid, 10 to 40 parts by weight of butadiene rubber latex , An acrylate-styrene-acrylonitrile latex 1 to 20 parts by weight and 1 to 20 parts by weight of a silane coupling agent to provide a high toughness cement concrete composition modified with an acrylic latex-based modifier and crude steel type.

According to the high-toughness cement concrete composition of super-velocity and crude steel type modified with an acrylic latex modifier according to an embodiment of the present invention and a road pavement maintenance method using the same, bending, tensile and adhesion strength are very improved, and the cement By promoting initial hydration and tissue densification, it is possible to manufacture tightly sealed concrete, which has the effect of preventing cracks and expansion fractures caused by the shrinkage of concrete. In addition, it can greatly improve abrasion resistance and waterproofness, suppress the corrosion of concrete by neutralization and chloride, and improve the freeze-thaw resistance according to temperature changes, thereby extending the durable life of the structure and reducing maintenance costs. there is an effect In addition, the curing speed is greatly improved, which has the effect of reducing the traffic designated according to vehicle control and promoting the convenience of the driver.

More specifically, the high-toughness cement concrete composition of the super-velocity and crude steel type modified with the acrylic latex-based modifier according to an embodiment of the present invention contains 10 to 40% by weight of a functional binder, 10 to 50% by weight of fine aggregate, and 5 to 5% by weight of coarse aggregate. 40% by weight, 0.1 to 10% by weight of the compounding water, and 0.1 to 10% by weight of an acrylic latex-based modifier.

The aggregate used in the present invention is divided into fine aggregate and coarse aggregate. Those having a particle diameter of 5 mm or less are called fine aggregates, and those having a particle diameter greater than 5 mm are classified as coarse aggregates. The fine aggregate is preferably contained in an amount of 10 to 50% by weight based on the high-toughness cement concrete composition of the super-velocity and crude steel type modified with the acrylic latex modifier of the present invention, and the coarse aggregate is modified with the acrylic latex modifier of the present invention It is preferably contained in an amount of 5 to 40% by weight based on the high toughness cement concrete composition of the initial velocity and crude steel type.

The functional binder used in the present invention promotes the initial hydration of cement and the densification of the tissue, so it is possible to manufacture tightly sealed concrete, thereby preventing cracking and expansion destruction caused by the shrinkage of concrete, and curing speed after application is fast and rapid Since it is possible to secure the initial strength, it is possible to quickly restore the damaged part of the concrete pavement, thereby dramatically reducing the vehicle control time and construction cost. In addition, by mixing with the acrylic latex modifier described later, the adhesion performance with the existing bridge pavement is improved, the mechanical properties such as flexural strength, tensile strength and compressive strength can be very strengthened, and the corrosion of concrete caused by neutralization and chloride is suppressed. , it not only improves the freeze-thaw resistance according to temperature changes, but also provides durability such as excellent abrasion resistance, chemical resistance, and waterproofness, so that it is possible to extend the durable life of the structure and reduce maintenance costs.

The functional binder is preferably included in an amount of 10 to 40% by weight in the high-toughness cement concrete composition of the initial velocity and crude steel type modified with the acrylic latex-based modifier of the present invention in consideration of the above-described improvement effect.

The functional binder is based on 100 parts by weight of crude portland cement, calcium sulfoaluminate 20 to 40 parts by weight, gypsum 10 to 30 parts by weight, barium titanate 10 to 30 parts by weight, sericite 1 to 10 parts by weight, polyaniline nanofiber 1 to 10 parts by weight, 0.1 to 5 parts by weight of clinoptilolite, and 0.1 to 5 parts by weight of zinc phosphate may be preferably used.

First, it is preferable to use the crude Portland cement specified in KS, and it is preferable to use a powder having a fineness of 4,500 to 7,000 cm ² /g.

Hereinafter, the content of other components constituting the functional binder is based on 100 parts by weight of the crude Portland cement.

The calcium sulfoaluminate has a fast curing rate after application, and it is possible to quickly secure the initial strength, so that the damaged part of the concrete pavement can be repaired quickly.

The calcium sulfoaluminate is preferably contained in an amount of 20 to 40 parts by weight based on 100 parts by weight of the crude Portland cement. When the content of the calcium sulfoaluminate is too small, there is a problem that the above-described improvement effect may be insufficient. There is a problem in that price competitiveness may be lowered.

The gypsum has a very dense structure to realize excellent long-term strength and to prevent cracking of concrete.

The gypsum is preferably contained in an amount of 10 to 30 parts by weight based on 100 parts by weight of the crude Portland cement. When the content of the gypsum is too small, there is a problem that the improvement effect may be insufficient, and when the content of the gypsum is too large, there is a problem that the initial strength expression may be delayed.

The barium titanate promotes the initial hydration of cement and densification of the tissue, thereby making it possible to manufacture sealed concrete, thereby preventing cracking and expansion and destruction caused by the shrinkage of concrete. It is possible to quickly repair the damaged part of the concrete pavement road. In addition, it functions to improve the freeze-thaw resistance according to the temperature change, as well as to improve the excellent abrasion resistance.

By using this barium titanate plate-shaped barium titanate, it is possible to further improve the above-described effects, and in the construction surface, before the hydration bonding of the water-hydratable binder proceeds, the coating layer is made more stable to prevent sagging and has a certain thickness. There is an effect that can keep the lining of the Accordingly, there is an effect that can implement resistance to cracking and excellent durability after construction.

More specifically, the plate-shaped barium titanate is _{mixed and pulverized with Bi 2} O ₃ , TiO ₂ , and barium chloride (BaCl ₂ ), and then heat-treated at 800 to 1300° C. for 1 to 3 hours, dissolved in distilled water, and washed And by filtering, to prepare a primary powder; BaCO ₃ , TiO ₂ , and barium chloride (BaCl ₂ ) are mixed in the primary powder and heat treated at 1000 to 1300 ° C. for 1 to 3 hours, dissolved in distilled water, washed and filtered, to prepare a secondary powder step; _{BaCO 3} and sodium chloride (NaCl) are mixed with the secondary powder and heat-treated at 800 to 1000° C. for 1 to 3 hours, then dissolved in distilled water, washed and filtered to prepare a tertiary powder; and mixing the tertiary powder in an acid aqueous solution having a concentration of 55 to 80% by weight _{, selectively dissolving the remaining Bi 2} O ₃ , then dissolving it in distilled water, washing and filtering, to prepare a plate-shaped barium titanate Those prepared by a method comprising can be preferably used.

In this case, the primary powder is Bi ₄ Ti ₃ O ₁₂ ; The secondary powder is BaBi ₄ Ti ₄ O ₁₅ ; The tertiary powder may be _{BaTiO 3 .}

In addition, the acid aqueous solution may preferably be at least one selected from the group consisting of hydrochloric acid, sulfuric acid, nitric acid, and a mixed acid thereof.

The barium titanate is preferably contained in an amount of 10 to 30 parts by weight based on 100 parts by weight of the crude steel portland cement. When the content of the barium titanate is too small, there is a problem that the above-described improvement effect may be insufficient, and when the content of the barium titanate is too large, the workability is lowered or the manufacturing cost is increased, so that the price competitiveness can be lowered. have.

The sericite functions to reduce the drying shrinkage of concrete, suppress microcracks, prevent expansion and fracture, and significantly improve durability. In addition, it not only improves the freeze-thaw resistance according to temperature changes, but also functions to improve excellent abrasion resistance, water resistance, fire resistance, deodorization properties, and antibacterial properties.

The sericite is preferably contained in an amount of 1 to 10 parts by weight based on 100 parts by weight of the crude steel portland cement. When the content of sericite is too small, there is a problem that the above improvement effect may be insufficient, and when the content of sericite is too large, workability is reduced or manufacturing cost is increased, so that price competitiveness may be lowered. have.

The polyaniline nanofibers greatly improve mechanical properties such as flexural strength, tensile strength and compressive strength of concrete, prevent cracking and expansion fracture caused by shrinkage of concrete, and significantly improve durability.

The polyaniline nanofibers are prepared by mixing a 0.01 to 0.8 M aniline solution with a 0.5 to 3 M acidic solution to prepare an acidic aniline solution; adding a 0.001 to 0.1 M ammonium persulfate solution to the acidic aniline solution, followed by polymerization to form polyaniline nanofibers; dialyzing the polyaniline nanofiber-formed solution with a hydrochloric acid solution having a pH of 2.5 to 3.5 to remove unreacted monomolecules and salts, and then dialyzing with distilled water to lower the acid concentration; And after dilution by adding distilled water to the polyaniline nanofibers after the dialysis, ultrasonic pulverization to separate the polyaniline nanofibers aggregated in distilled water, filtering and washing them; can

At this time, after diluting by adding distilled water to the dialysis-finished polyaniline nanofibers, before ultrasonic pulverization, 0.01 to 0.1 mg/mL of the spider silk hydrolyzate is added and mixed under the conditions of pH 5.5 to 7.5, and the surface of the polyaniline nanofibers By further performing the step of treating with the cobweb hydrolyzate, the above-described effect can be further improved, and excellent bonding strength can be provided, so that after construction, resistance to cracking and excellent durability can be realized, and in particular, It has the effect of improving resistance to neutralization and chloride.

At this time, the hydrolyzate of the spider silk is prepared by a manufacturing method comprising the steps of hydrolyzing the spider silk with hydrochloric acid of 5 to 20 times the weight and 0.5 to 8N, and concentrating the hydrolyzate under reduced pressure, followed by freeze-drying and powdering can be preferably used.

The polyaniline nanofiber is preferably contained in an amount of 1 to 10 parts by weight based on 100 parts by weight of the crude Portland cement. When the content of the polyaniline nanofibers is too small, there is a problem that the above-described improvement effect may be insufficient, and when the content of the polyaniline nanofibers is too large, the manufacturing cost increases and price competitiveness may be lowered.

The clinoptilolite greatly improves mechanical properties such as flexural strength, tensile strength and compressive strength of concrete, can prevent cracking and expansion fracture caused by shrinkage of concrete, freeze-thaw resistance according to temperature change, excellent abrasion resistance It has a function that can greatly improve the durability of the back.

The clinoptilolite is preferably contained in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of the crude steel portland cement. When the clinoptilolite content of the clinoptilolite is too small, the improvement effect may be insufficient. When the clinoptilolite content is too large, the initial strength expression is delayed, There is a problem in that price competitiveness may be lowered due to an increase in manufacturing cost.

The zinc phosphate has a very dense structure so that mechanical properties such as flexural strength, tensile strength and compressive strength are very strengthened, and it functions to prevent cracking and expansion fracture caused by shrinkage of concrete. In addition, it functions to provide durability such as excellent salt penetration resistance, freeze-thaw resistance, abrasion resistance, chemical resistance, waterproofness and neutralization resistance.

The zinc phosphate (Zn ₃ (PO ₄ ) ₂ ) is a plate-shaped zinc phosphate, so that the above-described effect can be further improved, and the coating layer is further applied before the hydration bonding of the water-soluble binder proceeds in construction. By stabilizing it, there is an effect that can prevent sagging and maintain a lining of a certain thickness. Accordingly, there is an effect that can implement resistance to cracking and excellent durability after construction.

More specifically, the plate-shaped zinc phosphate is prepared by dissolving zinc hydroxide in water or hydrochloric acid diluted to a concentration of 15 to 30% by weight; preparing a precipitate of zinc carbonate while slowly adding an aqueous carbonate solution having a concentration of 15 to 30 wt% to the solution dropwise; preparing a plate-shaped zinc phosphate precipitate while slowly adding dropwise an aqueous phosphate solution having a concentration of 15 to 30 wt % to the solution containing the zinc carbonate precipitate; It is prepared by a manufacturing method comprising the steps of filtering, washing and drying the solution containing the plate-shaped zinc phosphate precipitate, and can preferably be used with an average particle diameter of 0.1 to 3 μm.

In this case, the carbonate may preferably be at least one selected from the group consisting of sodium carbonate, sodium bicarbonate, ammonium carbonate, ammonium bicarbonate, and mixtures thereof; The phosphate salt may preferably be at least one selected from the group consisting of potassium phosphate, potassium monobasic, dipotassium phosphate, ammonium phosphate, monobasic ammonium phosphate, diammonium phosphate, and mixtures thereof.

The zinc phosphate is preferably contained in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of the crude Portland cement. When the content of the zinc phosphate (Zn ₃ (PO ₄ ) ₂ ) is too small, there is a problem that the above-described improvement effect may be insufficient, and when the content of the zinc phosphate (Zn ₃ (PO ₄ ) ₂ ) is too large performance is improved, but there is a problem in that the development of initial strength is delayed or the manufacturing cost is increased, which can lower price competitiveness.

On the other hand, the acrylic latex modifier used in the present invention is based on 100 parts by weight of the ethylene-methyl acrylate-methacrylic acid copolymer, 50 to 80 parts by weight of bisphenol A type epoxy resin, 30 to 60 parts by weight of dimer acid, butadiene 10 to 40 parts by weight of rubber latex, 1 to 20 parts by weight of acrylate-styrene-acrylonitrile latex, and 1 to 20 parts by weight of a silane coupling agent; It greatly improves the flexural toughness and adhesion strength of concrete, reduces drying shrinkage, suppresses microcracks and prevents expansion and fracture phenomena, greatly improves durability, and suppresses corrosion of concrete by neutralization and chloride. , by improving the freeze-thaw resistance, excellent abrasion resistance, chemical resistance and waterproofness according to temperature changes, it is possible to extend the durable life of the structure and reduce maintenance costs. In addition, it has excellent material and construction stability against external temperature changes, and has the effect of providing very improved workability.

The acrylic latex-based modifier is preferably included in an amount of 0.1 to 10% by weight in the high-toughness cement concrete composition of the initial velocity and crude steel type modified with the acrylic latex-based modifier according to an embodiment of the present invention in consideration of the above-described improvement effect. do.

First, the ethylene-methyl acrylate-methacrylic acid copolymer realizes excellent adhesion strength, has excellent permeability to cracks in concrete structures, prevents cracking and expansion fracture, and has excellent salt penetration resistance, freeze-thaw resistance It functions to improve resistance, abrasion resistance, chemical resistance, water resistance and neutralization resistance.

Hereinafter, the content of other components constituting the acrylic latex-based modifier is based on 100 parts by weight of the ethylene-methyl acrylate-methacrylic acid copolymer.

The bisphenol A epoxy resin has excellent penetrability to cracks in the concrete structure, greatly improving mechanical properties such as flexural strength, tensile strength and compressive strength of concrete, and suppressing microcracks by reducing drying shrinkage and preventing expansion fracture. It functions to improve excellent salt penetration resistance, freeze-thaw resistance, abrasion resistance, chemical resistance, waterproofness and neutralization resistance.

The bisphenol A type epoxy resin is preferably contained in an amount of 50 to 80 parts by weight based on 100 parts by weight of the ethylene-methyl acrylate-methacrylic acid copolymer. When the content of the bisphenol A type epoxy resin is too small, there is a problem that the above-described improvement effect may be insufficient, and when the content of the bisphenol A type epoxy resin is too large, the initial strength expression is delayed or the manufacturing cost increases There is a problem that may reduce competitiveness.

The dimer acid greatly improves the flexural toughness and adhesion strength of concrete with excellent penetrability to cracks in the concrete structure, and reduces drying shrinkage to suppress microcracks and prevent expansion fracture.

As the dimer acid, at least one selected from the group consisting of oleic acid, linoleic acid, stearic acid, palmitic acid, and mixtures thereof may be preferably used. In particular, the above-described effect can be further improved by using a mixture of oleic acid and linoleic acid in a weight ratio of 1: 0.2 to 0.7.

The dimer acid is preferably contained in an amount of 30 to 60 parts by weight based on 100 parts by weight of the ethylene-methyl acrylate-methacrylic acid copolymer. If the content of the dimer acid is too small, there is a problem that the above improvement effect may be insufficient. There is a problem.

The butadiene rubber latex greatly improves the flexural toughness and adhesion strength of concrete, reduces drying shrinkage, suppresses microcracks and prevents expansion fracture, and inhibits corrosion of concrete by neutralization and chloride, and excellent resistance It functions to improve chemical properties and waterproofness.

The butadiene rubber latex is preferably contained in an amount of 10 to 40 parts by weight based on 100 parts by weight of the ethylene-methyl acrylate-methacrylic acid copolymer. When the content of the butadiene rubber latex is too small, there is a problem that the above-described improvement effect may be insufficient, and when the content of the butadiene rubber latex is too large, the initial strength expression is delayed, or the manufacturing cost is increased, so that the price competitiveness is lowered. There are possible problems.

The acrylate-styrene-acrylonitrile latex greatly improves the flexural toughness and adhesion strength of concrete, reduces drying shrinkage, suppresses microcracks, and prevents expansion fracture, and neutralization and corrosion of concrete by chloride It suppresses and improves excellent chemical resistance and waterproofness. In addition, it is possible to provide excellent workability and strength expression effect, and there is an effect that can provide material and construction stability against external temperature change.

The acrylate-styrene-acrylonitrile latex is preferably contained in an amount of 1 to 20 parts by weight based on 100 parts by weight of the ethylene-methyl acrylate-methacrylic acid copolymer. When the content of the acrylate-styrene-acrylonitrile latex is too small, there is a problem that the above-described improvement effect may be insufficient, and when the content of the acrylate-styrene-acrylonitrile latex is too large, initial strength is expressed There is a problem in that price competitiveness may be lowered due to delay or increased manufacturing cost.

The silane coupling agent greatly improves the flexural toughness and adhesion strength of concrete by improving the bonding strength and miscibility with the functional binder, and suppresses microcracks by reducing drying shrinkage and prevents expansion fracture. do.

The silane coupling agent is N-3-(3-trimethoxysilylpropyl)ethylenediamine, dimethoxymethylsilylpropyl-N,N-dimethylthiocarbamoyltetrasulfide, 3-trimethoxysilylpropyl- N,N-dimethylthiocarbamoyltetrasulfide, 3-triethoxysilylpropyl-N,N-dimethylthiocarbamoyltetrasulfide, 2-triethoxysilylethyl-N,N-dimethylthiocarba By using at least one member selected from the group consisting of moyltetrasulfide and mixtures thereof, the above-described effect can be further improved. More preferably, N-3-(3-trimethoxysilylpropyl)ethylenediamine and dimethoxymethylsilylpropyl-N,N-dimethylthiocarbamoyltetrasulfide are mixed in a ratio of 1: 0.5 to 1 by weight. It not only improves the above effects, but also provides rapid curing speed, suppresses corrosion of concrete due to neutralization and chloride, freeze-thaw resistance according to temperature change, excellent abrasion resistance, chemical resistance and waterproofness, etc. can be further improved.

The silane coupling agent is preferably contained in an amount of 1 to 20 parts by weight based on 100 parts by weight of the ethylene-methyl acrylate-methacrylic acid copolymer. When the content of the silane coupling agent is too small, there is a problem that the above-described improvement effect may be insufficient, and when the content of the silane coupling agent is too large, there is a problem that the manufacturing cost increases and price competitiveness may decrease.

In addition, the acrylic latex-based modifier is based on 100 parts by weight of the ethylene-methyl acrylate-methacrylic acid copolymer, 0.1 to 5 parts by weight of hydroxyapatite sol, 0.1 to 5 parts by weight of tetraacetyl oxyresveratrol represented by the following Chemical Formula 1 and 0.1 to 5 parts by weight of epigallocatechin gallate. Thereby, it is possible to provide excellent workability and strength expression effect, and there is an effect that can provide material and construction stability against external temperature change.

[Formula 1]

More specifically, the hydroxyapatite sol quickly penetrates into the concrete and densifies the internal structure of the concrete, thereby providing excellent workability and strength expression effect.

As the hydroxyapatite sol is Si-containing hydroxyapatite sol, the above-described improvement effect is further improved, and excellent water resistance, durability, stain resistance, and the like can be greatly improved.

More specifically, the Si-containing hydroxyapatite sol is prepared by dissolving tetraethyl orthosilicate (TEOS) and triethyl phosphate (TEP) in ethyl alcohol to prepare a TEOS-TEP solution; hydrolyzing the TEOS-TEP solution by titrating the prepared TEOS-TEP solution with hydrochloric acid at a concentration of 0.1 to 0.5N to a pH of 1 to 3, followed by stirring; Dissolving calcium nitrate tetrahydrate (CNT) in ethyl alcohol to prepare a CNT solution; mixing by dropping the hydrolyzed TEOS-TEP solution in the same volume ratio to the prepared CNT solution; And it can be preferably used that is prepared by a method comprising the step of stirring the mixture.

More specifically, the Si-containing hydroxyapatite sol is a TEOS-TEP solution by dissolving tetraethyl orthosilicate (TEOS) and triethyl phosphate (TEP) in ethyl alcohol to a molar concentration (mol/L) of 0.3 to 0.7, respectively. manufacturing; hydrolyzing the TEOS-TEP solution by titrating the prepared TEOS-TEP solution with 0.1 to 0.5N hydrochloric acid to a pH of 1 to 3, then stirring at 40 to 60° C. for 4 to 10 hours; preparing a CNT solution by dissolving calcium nitrate tetrahydrate (CNT) in ethyl alcohol to a molar concentration of 1 to 2 (mol/L); mixing by dropping the hydrolyzed TEOS-TEP solution in the same volume ratio to the prepared CNT solution; What is prepared by a method comprising the step of stirring the mixture at 40 to 60 ℃ can be used more preferably.

The hydroxyapatite sol is preferably contained in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of the ethylene-methyl acrylate-methacrylic acid copolymer. When the content of the hydroxyapatite sol is too small, there is a problem that the above-described improvement effect may be insufficient, and when the content of the hydroxyapatite sol is too large, the manufacturing cost increases and price competitiveness may decrease. .

Tetraacetyl oxyresveratrol represented by Formula 1 greatly improves homogeneous miscibility with the functional binder, so it can provide excellent workability and strength expression effect, and provides material and construction stability against external temperature changes function to

The tetraacetyl oxyresveratrol represented by Formula 1 is preferably contained in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of the ethylene-methyl acrylate-methacrylic acid copolymer. When the content of tetraacetyl oxyresveratrol represented by the formula (1) is too small, there is a problem that the above-described improvement effect may be insufficient. There is a problem in that price competitiveness may be lowered.

The epigallocatechin gallate functions to provide material and construction stability against external temperature changes, suppress corrosion of concrete by neutralization and chloride, and improve excellent chemical resistance.

The epigallocatechin gallate is preferably contained in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of the ethylene-methyl acrylate-methacrylic acid copolymer. When the content of the epigallocatechin gallate is too small, the above-described improvement effect may be insufficient. there is a problem with

The high-toughness cement concrete composition of the initial velocity and crude steel type modified with an acrylic latex modifier according to a preferred embodiment of the present invention contains 10 to 40% by weight of functional binder, 10 to 50% by weight of fine aggregate, and 5 to 40% by weight of coarse aggregate. After stirring in a forced mixer, 0.1 to 10% by weight of mixing water and 0.1 to 10% by weight of an acrylic latex-based modifier are further mixed and stirred for a predetermined time (eg, 1 to 10 minutes).

In addition, another embodiment of the present invention is a road pavement maintenance method using the high-toughness cement concrete composition of the super-velocity and crude steel type modified with the acrylic latex-based modifier,

removing latance and impurities by cutting and blasting the road surface using a crusher, a planer, or a shot blaster; cleaning the removed area; maintaining a wet state by sprinkling water on the cleaned area; After maintaining a wet state, the step of brushing or primer treatment in order to obtain high adhesion and waterproof effect; pouring a high-toughness cement concrete composition of the super-velocity and crude steel type modified with the acrylic latex-based modifier on the top treated with bruising or primer; spraying curing agent to prevent initial plastic cracking by preventing evaporation of moisture from the upper part after pouring; Tying to increase crack induction and slip resistance after curing agent spraying; And it provides a road pavement maintenance method comprising the step of curing.

At this time, the step of removing the laitance and impurities can be removed to the lower part where the reinforcing bar exists, and after cleaning the removed area, removing the rust of the exposed reinforcing bar before the bruising or primer treatment step It may include further steps.

In the case of chipping the road surface using a chipping device such as a crusher, a planer, or a shot blaster in the step of removing the laitance and impurities, the reinforcing bars of the concrete structure are not exposed in normal cases, but in the case of severe deterioration, in the deteriorated part The reinforcing bar may be exposed, and when the reinforcing bar is exposed in this way, a separate anti-rust treatment should be performed, but according to the present invention, a separate rebar anti-rust treatment is not required.

In the curing step, depending on the atmospheric conditions including the temperature, humidity, and wind strength of the site, 1) only the curing agent is sprayed, or 2) after the curing agent is sprayed, a vinyl or curing cloth is covered on the upper part and sprayed to a wet state or 3) after spraying the curing agent, it is recommended to apply the curing step separately while maintaining the warmth using vinyl, curing cloth, or a thermal insulation cover.

In particular, in the curing step, in the case of on-site atmospheric conditions (for example, in the case of atmospheric conditions with high atmospheric temperature (25 ° C or higher), low relative humidity, and windy conditions, such as in summer, vinyl, curing cloth, etc. Conversely, if the atmospheric temperature (below 25℃) is not high, relative humidity is high, and there is little wind, spray only curing agent and cure according to) After spraying, cover the top with vinyl, curing cloth, etc. In addition, when the atmospheric temperature is 5 ℃ or less, after spraying the curing agent, it may further include the step of performing thermal insulation curing using vinyl, curing cloth, insulation cover, etc.

Hereinafter, the brushing or primer treatment is used to refer to an operation of facilitating adhesion of the high-toughness cement concrete composition of the super-velocity and crude steel type modified with the acrylic latex-based modifier to concrete concrete or a concrete slab.

As the brushing material, at least one selected from SBR (Styrene Butadiene Rubber) latex, Poly Acryl Ester (PAE), epoxy emulsion, Ethyl Vinyl Acetate (EVA), and acrylic emulsion is selected. can be used

In addition, as the primer material, at least one selected from SBR (Styrene Butadiene Rubber) latex, Poly Acryl Ester (PAE), epoxy emulsion, Ethyl Vinyl Acetate (EVA) and acrylic emulsion is selected can be used by

According to the high-toughness cement concrete composition of super-velocity and crude steel type modified with an acrylic latex modifier according to an embodiment of the present invention and a road pavement maintenance method using the same, bending, tensile and adhesion strength are very improved, and the cement By promoting initial hydration and tissue densification, it is possible to manufacture tightly sealed concrete, which has the effect of preventing cracks and expansion fractures caused by the shrinkage of concrete. In addition, it can greatly improve abrasion resistance and waterproofness, suppress the corrosion of concrete by neutralization and chloride, and improve the freeze-thaw resistance according to temperature changes, thereby extending the durable life of the structure and reducing maintenance costs. there is an effect In addition, the curing speed is greatly improved, which has the effect of reducing the traffic designated according to vehicle control and promoting the convenience of the driver.

As mentioned above, although preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various modifications can be made by those skilled in the art within the scope of the technical spirit of the present invention. This is possible.

<Production Example 1>

Production of plate-shaped barium titanate

After mixing and pulverizing Bi ₂ O ₃ , TiO ₂ , and barium chloride (BaCl ₂ ), heat treatment at 900° C. for 2 hours, dissolving in distilled water at 55° C., washing and filtering, Bi ₄ Ti ₃ O ₁₂ A phosphorus primary powder was prepared. Then, BaCO ₃ , TiO ₂ , and barium chloride (BaCl ₂ ) are mixed with the primary powder and heat treated at 1200° C. for 3 hours, dissolved in distilled water at 55° C., washed and filtered, BaBi ₄ Ti ₄ O _{A 15} phosphorus secondary powder was prepared. Thereafter, BaCO ₃ and sodium chloride (NaCl) were mixed with the secondary powder and heat-treated at 800° C. for 3 hours, dissolved in distilled water at 55° C., washed and filtered, thereby preparing a tertiary powder of _{BaTiO 3 .} Thereafter, the tertiary powder was mixed with an aqueous solution of sulfuric acid having a concentration of 70% by weight, and the remaining Bi ₂ O ₃ was selectively dissolved, dissolved in distilled water, washed and filtered, thereby preparing a plate-shaped barium titanate.

<Preparation Example 2>

Preparation of polyaniline nanofibers

mixing a 0.55 M aniline solution with a 2 M hydrochloric acid solution to prepare an acidic aniline solution; A 0.03 M ammonium persulfate solution was added to the acidic aniline solution, followed by polymerization to form polyaniline nanofibers. After that, the solution in which the polyaniline nanofibers are formed is dialyzed with a hydrochloric acid solution of pH 3 to remove unreacted monomolecules and salts, and then dialyzed with distilled water to lower the acid concentration, and distilled water is added to the polyaniline nanofibers after the dialysis has been completed. After dilution, the polyaniline nanofibers aggregated in distilled water were separated by ultrasonic pulverization, and filtered and washed to prepare polyaniline nanofibers.

<Production Example 3>

Preparation of polyaniline nanofibers

mixing a 0.55 M aniline solution with a 2 M hydrochloric acid solution to prepare an acidic aniline solution; A 0.03 M ammonium persulfate solution was added to the acidic aniline solution, followed by polymerization to form polyaniline nanofibers. After that, the solution in which the polyaniline nanofibers are formed is dialyzed with a hydrochloric acid solution of pH 3 to remove unreacted monomolecules and salts, and then dialyzed with distilled water to lower the acid concentration, and distilled water is added to the polyaniline nanofibers after the dialysis has been completed. After dilution, 0.07 mg/mL of a spider silk hydrolyzate was added and mixed under the condition of pH 6.5. Thereafter, the polyaniline nanofiber mixed solution treated with the spider silk hydrolyzate was ultrasonically pulverized to separate the polyaniline nanofibers aggregated in distilled water, and filtered and washed to prepare polyaniline nanofibers. At this time, the hydrolyzate of the spider silk was hydrolyzed by neutralizing the spider silk collected from the wild and indoors in a 10 times weight 1N HCl solution for 3 hours, then neutralized with a 1N NaOH solution, and then, the hydrolyzate was reduced pressure After concentration, freeze-drying and powdering were used.

<Production Example 4>

Manufacture of plate-shaped zinc phosphate

Zinc hydroxide is mixed with water or hydrochloric acid diluted to a concentration of 20% by weight, heated and dissolved on a hot plate, cooled, and then an aqueous solution of sodium carbonate having a concentration of 20% by weight is slowly added dropwise to the dissolved solution. A precipitate was prepared. While the solution containing the zinc carbonate precipitate was stirred at 500 rpm, an aqueous solution of sodium phosphate monobasic (NaH ₂ PO ₄ ) having a concentration of 20 wt% was slowly added dropwise to prepare a plate-shaped zinc phosphate precipitate. Thereafter, the solution containing the plate-shaped zinc phosphate precipitate was filtered and washed three times, and then heated and dried in an oven at 100° C. to prepare a plate-shaped zinc phosphate powder having an average particle diameter of 0.51 μm.

<Preparation Example 5>

Preparation of hydroxyapatite sol

Triethyl phosphate (TEP) was dissolved in ethyl alcohol to a molar concentration of 0.45 (mol/L) to prepare a TEP solution. Separately, by dissolving calcium nitrate tetrahydrate (CNT) in ethyl alcohol to a molar concentration of 1.77 (mol/L) to prepare a CNT solution, and dropping the prepared TEP solution to the prepared CNT solution in the same volume ratio mixed. Then, by stirring the mixture at 45 ℃, to prepare a hydroxyapatite sol.

<Preparation Example 6>

Preparation of Si-containing hydroxyapatite sol

A TEOS-TEP solution was prepared by dissolving tetraethyl orthosilicate (TEOS) and triethyl phosphate (TEP) in ethyl alcohol to a molar concentration (mol/L) of 0.45, respectively. The prepared TEOS-TEP solution was titrated to a pH of 2 with 0.1N hydrochloric acid, followed by stirring at 55° C. for 4 hours to hydrolyze the TEOS-TEP solution. Thereafter, calcium nitrate tetrahydrate (CNT) was dissolved in ethyl alcohol to a molar concentration of 1.77 (mol/L) to prepare a CNT solution, and the hydrolyzed TEOS-TEP solution was added to the prepared CNT solution in the same volume ratio. It mixed by dripping. Then, by stirring the mixture at 45 ℃, Si-containing hydroxyapatite sol was prepared.

<Examples and Comparative Examples>

After putting the functional binder, fine aggregate and coarse aggregate mixed in the components and contents as shown in Table 1 in the forced mixing mixer, the mixture was mixed for 3 minutes under dry mixing conditions, and the components and contents as shown in Table 1 below were used. The mixed mixing water and the acrylic latex-based modifier were simultaneously added and mixed for 1 minute and 30 seconds to prepare a high-toughness cement concrete composition and a comparative concrete composition of the super-velocity and crude steel type modified with the acrylic latex-based modifier.

The following test examples are experiments comparing the characteristics of Examples 1 and 2 according to the present invention with those of Comparative Examples 1 and 2 in order to more easily grasp the characteristics of Examples 1 to 3 according to the present invention disclosed above. the results are shown.

<Test Example 1>

According to the method stipulated in KS F 2402, the high toughness cement concrete composition of the super-velocity and crude steel type modified with the acrylic latex-based modifier according to Examples 1 to 3 of the present invention and the cement concrete composition for comparison according to Comparative Example 1 were slumped. A test (degree of kneading) was carried out. The slump test is to test the quality of the dough, such as the softness and consistency of concrete, and the higher the number, the better the workability, that is, the workability when pouring concrete. The change value of the slump over time is shown in Table 2 below.

As can be seen in Table 2, the high toughness cement concrete composition of the initial velocity and crude steel type modified with the acrylic latex-based modifier according to Examples 1 to 3 was compared with the comparative cement concrete composition according to Comparative Example 1, In particular, the high-toughness cement concrete composition of the super-velocity and crude steel type modified with the acrylic latex-based modifier prepared according to Example 3 has excellent workability because the slump does not change significantly over time. could check

<Test Example 2>

The initial velocity modified with the acrylic latex-based modifier according to the present invention and the initial velocity modified with the acrylic latex-based modifier according to Examples 1 to 3 of the present invention so that the characteristics of the crude steel type high-toughness cement concrete composition can be grasped more specifically. And the properties of the crude steel type high toughness cement concrete composition and the comparative cement concrete composition according to Comparative Example 1 were evaluated, and the results are shown in Table 2 below.

As can be seen in Table 3, the high toughness cement concrete composition of the initial velocity and crude steel type modified with the acrylic latex-based modifier according to Examples 1 to 3 was compared with the comparative cement concrete composition according to Comparative Example 1, It was confirmed that the rate of change in length according to drying shrinkage was small. In addition, the high toughness cement concrete composition of the initial velocity and crude steel type modified with the acrylic latex modifier according to Examples 1 to 3 has excellent compressive strength, flexural strength and adhesion strength, compared to the comparative cement concrete composition according to Comparative Example 1. to have; It was confirmed that it had excellent waterproofness, salt penetration resistance, freeze-thaw resistance, abrasion resistance, chemical resistance and rust prevention rate.

As described above, those skilled in the art to which the present invention pertains will be able to understand that the present invention may be implemented in other specific forms without changing the technical spirit or essential characteristics thereof. Therefore, it should be understood that all of the embodiments described above are illustrative and not restrictive. The scope of the present invention should be construed as being included in the scope of the present invention, rather than the above detailed description, all changes or modifications derived from the meaning and scope of the claims to be described later and their equivalent concepts.

Claims (6)

10 to 40% by weight of a functional binder, 10 to 50% by weight of fine aggregate, 5 to 40% by weight of coarse aggregate, 0.1 to 10% by weight of mixing water, and 0.1 to 10% by weight of an acrylic latex-based modifier;
The functional binder is based on 100 parts by weight of crude Portland cement, calcium sulfoaluminate 20 to 40 parts by weight, gypsum 10 to 30 parts by weight, barium titanate 10 to 30 parts by weight, sericite 1 to 10 parts by weight, polyaniline nanofiber 1 to 10 parts by weight, 0.1 to 5 parts by weight of clinoptilolite, and 0.1 to 5 parts by weight of zinc phosphate;
The acrylic latex-based modifier is based on 100 parts by weight of the ethylene-methyl acrylate-methacrylic acid copolymer, 50 to 80 parts by weight of bisphenol A type epoxy resin, 30 to 60 parts by weight of dimer acid, 10 to 40 parts by weight of butadiene rubber latex , acrylate-styrene-acrylonitrile latex 1 to 20 parts by weight and silane coupling agent 1 to 20 parts by weight of the acrylic latex-based modifier modified high-toughness cement concrete composition of the super-fast and crude steel type. The method of claim 1,
The polyaniline nanofibers are
mixing a 0.01 to 0.8 M aniline solution with a 0.5 to 3 M acidic solution to prepare an acidic aniline solution; adding a 0.001 to 0.1 M ammonium persulfate solution to the acidic aniline solution, followed by polymerization to form polyaniline nanofibers; dialyzing the polyaniline nanofiber-formed solution with a hydrochloric acid solution having a pH of 2.5 to 3.5 to remove unreacted monomolecules and salts, and then dialyzing with distilled water to lower the acid concentration; And after dilution by adding distilled water to the polyaniline nanofibers after the dialysis has been completed, ultrasonic pulverization to separate the polyaniline nanofibers aggregated in distilled water, filtering and washing them; characterized in that it is prepared by a method comprising: A high-toughness cement concrete composition of super-velocity and crude steel type modified with an acrylic latex-based modifier. 3. The method of claim 2,
After diluting by adding distilled water to the dialysis-finished polyaniline nanofibers, before ultrasonic pulverization, 0.01 to 0.1 mg/mL of a spider silk hydrolyzate is added and mixed under the conditions of pH 5.5 to 7.5, and the surface of the polyaniline nanofibers is hydrolyzed by spider silk. further performing the step of treating with the decomposition product;
The hydrolyzate of the spider silk is prepared by a manufacturing method comprising the steps of hydrolyzing the spider silk with 5 to 20 times the weight and 0.5 to 8N of hydrochloric acid, and concentrating the hydrolyzate under reduced pressure, followed by freeze-drying and powdering High-toughness cement concrete composition of super-velocity and crude steel type modified with an acrylic latex-based modifier, characterized in that. The method of claim 1,
The acrylic latex-based modifier is based on 100 parts by weight of the ethylene-methyl acrylate-methacrylic acid copolymer,
0.1 to 5 parts by weight of hydroxyapatite sol, 0.1 to 5 parts by weight of tetraacetyl oxyresveratrol represented by the following Chemical Formula 1, and 0.1 to 5 parts by weight of epigallocatechin gallate Modified with an acrylic latex-based modifier High-toughness cement concrete composition of super-velocity and crude steel type.
[Formula 1]

5. The method of claim 4,
the hydroxyapatite sol is a Si-containing hydroxyapatite sol;
The Si-containing hydroxyapatite sol is prepared by dissolving tetraethyl orthosilicate (TEOS) and triethyl phosphate (TEP) in ethyl alcohol to prepare a TEOS-TEP solution; hydrolyzing the TEOS-TEP solution by titrating the prepared TEOS-TEP solution with hydrochloric acid having a concentration of 0.1 to 0.5N to a pH of 1 to 3, followed by stirring; Dissolving calcium nitrate tetrahydrate (CNT) in ethyl alcohol to prepare a CNT solution; mixing by dropping the hydrolyzed TEOS-TEP solution in the same volume ratio to the prepared CNT solution; and high-toughness cement concrete composition of the super-velocity and crude steel type modified with an acrylic latex-based modifier, characterized in that it is prepared by a method comprising the step of stirring the mixture. As a road pavement maintenance method using the high-toughness cement concrete composition of the super-velocity and crude steel type modified with the acrylic latex-based modifier according to any one of claims 1 to 5,
removing latance and impurities by cutting and blasting the road surface using a crusher, a planer, or a shot blaster; cleaning the removed area; maintaining a wet state by sprinkling water on the cleaned area; After maintaining a wet state, the step of brooming or primer treatment in order to obtain high adhesion and waterproof effect; pouring a high-toughness cement concrete composition of the super-velocity and crude steel type modified with the acrylic latex-based modifier on the top treated with bruising or primer; spraying curing agent to prevent initial plastic cracking by preventing evaporation of moisture from the upper part after pouring; Tying to increase crack induction and slip resistance after curing agent spraying; And road pavement maintenance method comprising the step of curing.