KR102338597B1 - High functional quick-hardening and ultra-early strength type cement concrete composition modified by polymer modifier with diene rubber latex and the construction method for road pavement using the same - Google Patents

Abstract

The present invention relates to a high functional quick-hardening and an ultra-early strength type cement concrete composition modified by a polymer modifier containing diene rubber latex, and a construction method for a road pavement using the same, to quickly repair damaged parts of concrete pavement and prevent cracking and expansion destruction caused by the shrinkage of concrete. The composition includes 10 to 40 wt% of a high-functional binder, 10 to 50 wt% of fine aggregate, 5 to 40 wt% of coarse aggregate, 0.1 to 10 wt% of compounding water and 0.1 to 10 wt% of a polymer modifier.

Description

High functional quick-hardening and ultra-early strength type cement concrete composition modified by polymer modifier with diene rubber latex and road pavement construction method using the same the construction method for road pavement using the same}

The present invention can produce tight concrete by promoting the initial hydration of cement and densification of the tissue, so that the damaged part of the concrete pavement can be quickly repaired, and cracks and expansion destruction caused by the shrinkage of the concrete can be prevented. High-functional ultra-fast and crude steel cement concrete composition modified with a polymer modifier containing diene rubber latex that can provide durability such as excellent strength, salt penetration resistance, freeze-thaw resistance and abrasion resistance, and road pavement construction method using the same is about

In general, concrete pavements have disadvantages such as rigidity, which has large construction restrictions on temperature and surrounding environment, takes a long curing period, cracks due to drying shrinkage, unpleasant ride comfort and noise, etc., but excellent durability and maintenance It is being applied to highways and heavy-vehicle roads with advantages such as cost reduction. In particular, in concrete pavements such as road surfaces or bridge decks, deterioration due to vehicle load and corrosion or erosion due to environmental factors occur more frequently. Prevention is necessary to prevent it.

In the past, portland cement was usually used for the repair of the concrete pavement, but the concrete pavement repair work using the ordinary portland cement took a lot of time for curing, and there was a problem of causing traffic congestion on the road.

Therefore, in order to shorten the curing time, it was attempted to realize rapid strength development by 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 order to solve the above problems, latex modified concrete that forms a watertight structure by adding SBR (Styrene-Butadiene Rubber) latex to general concrete in the early 2000s has been developed and used.

More specifically, Korean Patent Registration No. 10-0421255 describes a technique for using latex-modified concrete in which SBR (styrene-butadiene rubber) latex is added for concrete repair and reinforcement work.

However, in the above technology, SBR latex is specified only for bridge pavement of new bridges, and the latex is specialized for general portland cement (class 1 cement). It is difficult to use, and the performance was also limited in maintaining the adhesion strength between the deteriorated or neutralized gas concrete and the latex-modified concrete for repair.

In addition, in the case of using the modified super-velocity concrete to which SBR latex is added, the chloride penetration resistance or freeze-thaw stability in the winter season is low, so after the winter season, the surface peeling of the latex-modified concrete, partial damage and dropping, porthole generation and drying shrinkage and relaxation stress There was a problem in that cracks occurred due to the

Republic of Korea Patent Registration No. 10-0911659 Republic of Korea Patent Registration No. 10-1498502 Republic of Korea Patent No. 10-1789615 Republic of Korea Patent Registration No. 10-1982186

The present invention has been devised to solve the above-mentioned problems, and an embodiment of the present invention promotes initial hydration of cement and densification of tissue, and shrinkage of concrete so as to reduce vehicle control time and construction cost. High-functional ultra-high speed and crude steel cement concrete modified with a polymer modifier containing diene rubber latex that can prevent cracking and expansion fracture caused by the An object of the present invention is to provide a composition and a road pavement construction 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 comprises 10 to 40% by weight of a high-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 a polymer modifier;

The high-functional binder is based on 100 parts by weight of crude Portland cement, calcium sulfoaluminate 20 to 40 parts by weight, barium aluminosilicate 10 to 30 parts by weight, gypsum 10 to 30 parts by weight, zinc phosphate 1 to 10 parts by weight, polyaniline 0.1 to 5 parts by weight of nanofibers, 0.1 to 5 parts by weight of clinoptilolite, and 0.1 to 5 parts by weight of manganese sulfate;

The polymer modifier is based on 100 parts by weight of the acrylic copolymer resin, 50 to 80 parts by weight of bisphenol A epoxy resin, 30 to 60 parts by weight of dimer acid, 10 to 40 parts by weight of diene-based rubber latex, and 1 to 20 parts by weight of a silane coupling agent. to include;

The diene-based rubber latex is a polymer modifier containing a diene-based rubber latex prepared by polymerization of 60 to 80% by weight of a conjugated diene-based monomer, 10 to 30% by weight of an aromatic vinyl-based monomer, and 1 to 20% by weight of a vinylcyanic monomer. Provided is a high-functionality initial velocity and crude steel cement concrete composition modified with

The polymer modifier is based on 100 parts by weight of the acrylic copolymer resin, 1 to 10 parts by weight of methylhydrogenpolysiloxane represented by the following Chemical Formula 1, 0.1 to 5 parts by weight of isoamyl laurate, 0.1 to 5 parts by weight of chondroitin sulfate, and Epigal It may further include 0.1 to 5 parts by weight of locatechin gallate.

[Formula 1]

In the above formula,

a is an integer from 10 to 300;

The zinc phosphate (Zn ₃ (PO ₄ ) ₂ ) is a plate-shaped zinc phosphate;

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 may be prepared by a manufacturing method comprising the steps of filtering, washing with water and drying the solution containing the plate-shaped zinc phosphate precipitate.

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

In addition, another embodiment of the present invention is a road pavement construction method using the high-functional initial velocity and crude steel cement concrete composition modified with the diene-based rubber latex-containing polymer 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-functionality bristle and crude steel cement concrete composition modified with the diene-based rubber latex-containing polymer 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 construction method comprising the step of curing.

According to the high-functional super-fast and crude steel cement concrete composition modified with a diene-based rubber latex-containing polymer modifier according to an embodiment of the present invention and a road pavement construction method using the same, the hardening speed is fast and the damaged part of the concrete pavement road is quickly repaired. Restoration has the effect of dramatically reducing vehicle control time and construction costs. In addition, it is possible to manufacture tightly sealed concrete by promoting the initial hydration of cement and densification of the structure, thereby preventing cracking and expansion destruction caused by the shrinkage of concrete. By providing durability such as, it is possible to extend the service period and reduce the cost of maintenance.

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 comprises 10 to 40% by weight of a high-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 a polymer modifier;

The high-functional binder is based on 100 parts by weight of crude Portland cement, calcium sulfoaluminate 20 to 40 parts by weight, barium aluminosilicate 10 to 30 parts by weight, gypsum 10 to 30 parts by weight, zinc phosphate 1 to 10 parts by weight, polyaniline 0.1 to 5 parts by weight of nanofibers, 0.1 to 5 parts by weight of clinoptilolite, and 0.1 to 5 parts by weight of manganese sulfate;

The polymer modifier is based on 100 parts by weight of the acrylic copolymer resin, 50 to 80 parts by weight of bisphenol A epoxy resin, 30 to 60 parts by weight of dimer acid, 10 to 40 parts by weight of diene-based rubber latex, and 1 to 20 parts by weight of a silane coupling agent. to include;

The diene-based rubber latex is a polymer modifier containing a diene-based rubber latex prepared by polymerization of 60 to 80% by weight of a conjugated diene-based monomer, 10 to 30% by weight of an aromatic vinyl-based monomer, and 1 to 20% by weight of a vinylcyanic monomer. Provided is a high-functionality initial velocity and crude steel cement concrete composition modified with

According to the high-functional ultra-fast and crude steel cement concrete composition modified with the diene-based rubber latex-containing polymer modifier according to an embodiment of the present invention and the road pavement construction method using the same, the hardening speed is fast and the damaged part of the concrete pavement road is fast It has the effect of dramatically reducing vehicle control time and construction costs by restoring the In addition, it is possible to manufacture tightly sealed concrete by promoting the initial hydration of cement and densification of the structure, thereby preventing cracking and expansion destruction caused by the shrinkage of concrete. By providing durability such as, it is possible to extend the service period and reduce the cost of maintenance.

More specifically, the high-functionality initial velocity and crude steel cement concrete composition modified with the diene-based rubber latex-containing polymer modifier according to an embodiment of the present invention is a high-functional binder 10 to 40% by weight, fine aggregate 10 to 50% by weight, coarse aggregate 5 to 40% by weight, 0.1 to 10% by weight of a compounding water, and 0.1 to 10% by weight of a polymer 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-functional initial velocity and crude steel cement concrete composition modified with the diene-based rubber latex-containing polymer modifier of the present invention, and the coarse aggregate is the diene-based rubber latex-containing polymer of the present invention It is preferably contained in an amount of 5 to 40% by weight based on the high-functionality initial velocity and crude steel cement concrete composition modified with the modifier.

The high-functional binder used in the present invention promotes the initial hydration of cement and densification of the tissue to make tight concrete. It functions to dramatically reduce vehicle control time and construction cost by restoring In addition, by mixing with the polymer modifier described later, the adhesion performance with the existing bridge pavement is improved, and the mechanical properties such as flexural strength, tensile strength and compressive strength are very strengthened, so that cracking and expansion fracture caused by shrinkage of concrete can be prevented. It also provides durability such as excellent salt penetration resistance, freeze-thaw resistance, abrasion resistance, chemical resistance, waterproofness and neutralization resistance, thereby reducing the cost of maintenance and extension of service period.

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

The high-functional binder is, based on 100 parts by weight of crude Portland cement, calcium sulfoaluminate 20 to 40 parts by weight, barium aluminosilicate 10 to 30 parts by weight, gypsum 10 to 30 parts by weight, zinc phosphate 1 to 10 parts by weight, A polyaniline nanofiber containing 0.1 to 5 parts by weight, 0.1 to 5 parts by weight of clinoptilolite, and 0.1 to 5 parts by weight of manganese sulfate may be preferably used.

First, it is preferable to use the crude steel Portland cement specified in KS, and it is preferable to use a powder having a fineness of 4,500 to 7,000 cm2/g.

Hereinafter, the content of other components constituting the high-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 barium aluminosilicate promotes the initial hydration of cement and the densification of the tissue to make tight concrete. function that can. In addition, 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 the shrinkage of concrete.

The barium aluminosilicate 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 barium aluminosilicate is too small, there is a problem that the above-described improvement effect may be insufficient, and when the content of the barium aluminosilicate is too large, the manufacturing cost increases and the 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 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 1 to 10 parts by weight based on 100 parts by weight of the crude steel 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.

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 0.1 to 5 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 manganese sulfate promotes the initial hydration of cement and the densification of the tissue to make tight concrete. function. In addition, by improving abrasion resistance, corrosion resistance and chemical resistance, it functions to provide very improved durability such as salt penetration resistance and freeze-thaw resistance.

The manganese sulfate 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 manganese sulfate is too small, there is a problem that the above-described improvement effect may be insufficient, and when the content of the manganese sulfate is too large, there is a problem that the manufacturing cost increases and the price competitiveness may decrease.

On the other hand, the polymer modifier used in the present invention is the polymer modifier, based on 100 parts by weight of the acrylic copolymer resin, 50 to 80 parts by weight of a bisphenol A type epoxy resin, 30 to 60 parts by weight of a dimer acid, 10 to 40 parts by weight of a diene-based rubber latex including 1 to 20 parts by weight and 1 to 20 parts by weight of a silane coupling agent; It has excellent adhesion to the existing bridge pavement, and mechanical properties such as flexural strength, tensile strength and compressive strength are very strong, so it is possible to prevent cracking and expansion fracture caused by shrinkage of concrete, and excellent salt penetration resistance, freeze-thaw resistance , abrasion resistance, chemical resistance, waterproofness and neutralization resistance, etc. are provided to reduce the cost of service period extension and maintenance. In addition, it has excellent material and construction stability against external temperature changes, and has the effect of providing very improved workability.

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

First, the acrylic copolymer resin implements excellent adhesion strength, and has excellent permeability to cracked areas of concrete structures to prevent cracking and expansion fracture phenomena, and excellent salt penetration resistance, freeze-thaw resistance, abrasion resistance, chemical resistance, It functions to improve waterproofness and neutralization resistance.

The acrylic copolymer resin may further improve the above-described effect by using a copolymer of 10 to 30% by weight of methyl methacrylate, 40 to 60% by weight of butyl acrylate, and 10 to 30% by weight of methacrylonitrile.

Hereinafter, the content of other components constituting the polymer modifier is based on 100 parts by weight of the acrylic copolymer resin.

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 acrylic copolymer resin. 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 acrylic copolymer resin. 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 diene-based rubber latex greatly improves mechanical properties such as flexural strength, tensile strength and compressive strength as well as adhesion strength of concrete, suppresses microcracks by reducing drying shrinkage, and prevents expansion fracture, and excellent salt penetration It functions to improve resistance, freeze-thaw resistance, abrasion resistance, chemical resistance, waterproofness and neutralization resistance.

The diene-based rubber latex may preferably be prepared by polymerizing 60 to 80% by weight of a conjugated diene-based monomer, 10 to 30% by weight of an aromatic vinylic monomer, and 1 to 20% by weight of a vinylcyanic monomer.

In this case, the conjugated diene-based monomer may preferably be selected from the group consisting of 1,3-butadiene, isoprene, chloroprene, and mixtures thereof.

In addition, the aromatic vinyl-based monomer may preferably be selected from the group consisting of styrene, α-methyl styrene, α-ethyl styrene, p-methyl styrene, and mixtures thereof.

In addition, the vinyl cyan-based monomer may preferably be used selected from the group consisting of acrylonitrile, methacrylonitrile, ethacrylonitrile, and mixtures thereof.

The diene-based rubber latex is preferably contained in an amount of 10 to 40 parts by weight based on 100 parts by weight of the acrylic copolymer resin. When the content of the diene-based rubber latex is too small, there is a problem that the above-described improvement effect may be insufficient, and when the content of the diene-based rubber latex is too large, the initial strength expression is delayed or the manufacturing cost is increased, so that the price competitiveness is There is a problem that can be degraded.

The silane coupling agent greatly improves mechanical properties such as flexural strength, tensile strength and compressive strength of concrete by improving bonding strength and miscibility with the high-functional binder, and suppresses microcracks by reducing drying shrinkage and prevents expansion fracture function to prevent it.

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 acrylic copolymer resin. 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 polymer modifier is based on 100 parts by weight of the acrylic copolymer resin, 1 to 10 parts by weight of methylhydrogenpolysiloxane represented by the following Chemical Formula 1, 0.1 to 5 parts by weight of isoamyl laurate, 0.1 to 5 parts by weight of chondroitin sulfate, and It may further include 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]

In the above formula,

a is an integer from 10 to 300;

More specifically, the methylhydrogenpolysiloxane represented by Formula 1 can provide excellent mechanical properties such as flexural strength, tensile strength and compressive strength of concrete by improving bonding strength and miscibility with the high-functional binder, and external temperature It functions to provide stability in material and construction against changes and excellent workability.

The methylhydrogenpolysiloxane represented by Formula 1 may further improve the above-described effects by using a mixture of a is an integer of 10 to 80 and a is an integer of 150 to 250 in a weight ratio of 1: 1 to 4, respectively. have.

The methylhydrogenpolysiloxane represented by Formula 1 is preferably contained in an amount of 1 to 10 parts by weight based on 100 parts by weight of the acrylic copolymer resin. When the content of the methylhydrogenpolysiloxane represented by Formula 1 is too small, there is a problem that the above-described improvement effect may be insufficient, and when the content of the methylhydrogenpolysiloxane represented by Formula 1 is too large, the manufacturing cost increases. There is a problem in that price competitiveness may be lowered.

The isoamyl laurate greatly improves the homogeneous miscibility with the high-functional binder, can provide excellent workability and strength expression effect, and provides material and construction stability against external temperature changes. .

The isoamyl laurate is preferably contained in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of the acrylic copolymer resin. When the content of isoamyl laurate is too small, there is a problem that the above-described improvement effect may be insufficient. When the content of isoamyl laurate is too large, the initial strength expression is delayed or the manufacturing cost is increased, so that the price competitiveness is reduced. There is a problem that can be degraded.

The chondroitin sulfate improves the initial adhesion strength and greatly improves the homogeneous miscibility with the high-functional binder, so it can provide an excellent strength expression effect, and provides material and construction stability against external temperature changes. do

The chondroitin sulfate is preferably contained in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of the acrylic copolymer resin. When the content of the chondroitin sulfate is too small, there is a problem that the above improvement effect may be insufficient, and when the content of the chondroitin sulfate is too large, the workability is reduced or the manufacturing cost is increased. have.

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 acrylic copolymer resin. 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-functionality initial velocity and crude steel cement concrete composition modified with a diene-based rubber latex-containing polymer modifier according to a preferred embodiment of the present invention contains 10 to 40% by weight of a high-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 a polymer modifier may be 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 construction method using the high-functional initial velocity and crude steel cement concrete composition modified with the diene-based rubber latex-containing polymer 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-functionality bristle and crude steel cement concrete composition modified with the diene-based rubber latex-containing polymer 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 construction 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 bruising or primer treatment refers to an operation of facilitating attachment of the high-functional ultra-high speed and crude steel cement concrete composition modified with the diene-based rubber latex-containing polymer modifier to spherical concrete or 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-functional super-fast and crude steel cement concrete composition modified with a diene-based rubber latex-containing polymer modifier according to an embodiment of the present invention and a road pavement construction method using the same, the hardening speed is fast and the damaged part of the concrete pavement road is quickly repaired. Restoration has the effect of dramatically reducing vehicle control time and construction costs. In addition, it is possible to manufacture tightly sealed concrete by promoting the initial hydration of cement and densification of the structure, thereby preventing cracking and expansion destruction caused by the shrinkage of concrete. By providing durability such as, it is possible to extend the service period and reduce the cost of maintenance.

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>

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 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 spider silk hydrolyzate hydrolyzed the spider silk collected from the wild and indoors by stirring it in a 10-fold weight 1N HCl solution for 3 hours, then neutralizing the spider silk with a 1N NaOH solution. After that, the hydrolyzate was decompressed. After concentration, freeze-drying and powdering were used.

<Examples and Comparative Examples>

After putting the high-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 The mixed water and polymer modifier were simultaneously added and mixed for 1 minute and 30 seconds to prepare a high-functional initial velocity and crude steel cement concrete composition modified with a diene-based rubber latex-containing polymer modifier and a comparative concrete composition.

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-functional initial velocity and crude steel cement concrete composition modified with the diene-based rubber latex-containing polymer modifier according to Examples 1 to 3 of the present invention and the cement concrete composition for comparison according to Comparative Example 1 A slump test (degree of kneading) was performed. 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 values of the slump over time are shown in Table 2 below.

As can be seen in Table 2, the high-functionality initial velocity and crude steel cement concrete composition modified with the diene-based rubber latex-containing polymer modifier according to Examples 1 to 3 was compared with the comparative cement concrete composition according to Comparative Example 1. , the workability is excellent, and in particular, the high-functionality initial velocity and crude steel cement concrete composition modified with the diene-based rubber latex-containing polymer modifier prepared according to Example 3 does not have a large change in slump even over time, so the workability is very It was confirmed that it was excellent.

<Test Example 2>

The diene-based rubber latex-containing polymer modifier according to Examples 1 to 3 of the present invention so that the characteristics of the high-functional initial velocity and crude steel cement concrete composition modified with the diene-based rubber latex-containing polymer modifier according to the present invention can be identified more specifically The characteristics of the modified high-performance super-velocity and crude steel 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-functionality initial velocity and crude steel cement concrete composition modified with the diene-based rubber latex-containing polymer 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-functionality initial velocity and crude steel cement concrete compositions modified with the diene-based rubber latex-containing polymer modifier according to Examples 1 to 3 were superior to the comparative cement concrete composition according to Comparative Example 1, and excellent compressive strength, flexural strength and adhesion have strength; 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 high-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 a polymer modifier;
The high-functional binder is based on 100 parts by weight of crude Portland cement, calcium sulfoaluminate 20 to 40 parts by weight, barium aluminosilicate 10 to 30 parts by weight, gypsum 10 to 30 parts by weight, zinc phosphate 1 to 10 parts by weight, polyaniline 0.1 to 5 parts by weight of nanofibers, 0.1 to 5 parts by weight of clinoptilolite, and 0.1 to 5 parts by weight of manganese sulfate;
The polymer modifier is based on 100 parts by weight of the acrylic copolymer resin, 50 to 80 parts by weight of bisphenol A epoxy resin, 30 to 60 parts by weight of dimer acid, 10 to 40 parts by weight of diene-based rubber latex, and 1 to 20 parts by weight of a silane coupling agent. to include;
The diene-based rubber latex contains a diene-based rubber latex, characterized in that it is prepared by polymerization of 60 to 80% by weight of a conjugated diene-based monomer, 10 to 30% by weight of an aromatic vinyl-based monomer, and 1 to 20% by weight of a vinylcyanic monomer. A high-performance super-fast and crude steel cement concrete composition modified with a polymer modifier. According to claim 1,
The polymer modifier is based on 100 parts by weight of the acrylic copolymer resin,
1 to 10 parts by weight of methylhydrogenpolysiloxane represented by the following formula (1), 0.1 to 5 parts by weight of isoamyl laurate, 0.1 to 5 parts by weight of chondroitin sulfate, and 0.1 to 5 parts by weight of epigallocatechin gallate A high-functionality initial velocity and crude steel cement concrete composition modified with a diene-based rubber latex-containing polymer modifier.
[Formula 1]

In the above formula,
a is an integer from 10 to 300; According to claim 1,
The zinc phosphate (Zn ₃ (PO ₄ ) ₂ ) is a plate-shaped zinc phosphate;
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; High-functional ultra-fast and crude steel cement concrete composition modified with a diene-based rubber latex-containing polymer modifier, characterized in that it is prepared by a manufacturing method comprising the steps of filtering, washing and drying the solution containing the plate-shaped zinc phosphate precipitate . According to 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-functionality super-fast and crude steel cement concrete composition modified with a diene-based rubber latex-containing polymer modifier. 5. The method of claim 4,
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 A high-functionality super-fast and crude steel cement concrete composition modified with a diene-based rubber latex-containing polymer modifier. As a road pavement construction method using a high-functional ultra-high speed and crude steel cement concrete composition modified with a diene-based rubber latex-containing polymer 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-functionality bristle and crude steel cement concrete composition modified with the diene-based rubber latex-containing polymer 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 construction method comprising the step of curing.