KR102363749B1 - High ductility, quick-hardening and ultra-early strength type cement concrete composition modified by polymer modifier and the construction method for road pavement using the same - Google Patents

Abstract

The present invention relates to a high ductility, quick-hardening, and ultra-early strength cement concrete composition and a road pavement construction method using the same. The composition comprises: 10 to 30 wt% of a quick-hardening and ultra-early strength binder, 30 to 50 wt% of fine aggregate, 30 to 50 wt% of coarse aggregate, 0.1 to 10 wt% of water, and 0.1 to 10 wt% of a high ductility admixture, wherein the quick-hardening and ultra-early strength binder comprises ultra-early strength Portland cement, silicon manganese slag, gypsum, calcium sulfoaluminate, calcium aluminoferrite, zirconium phosphate, tin oxide, chlorite, and an astaxanthin-nanodiamond complex; and the high ductility admixture comprises a bisphenol A type epoxy resin, acrylonitrile-methyl (meth)acrylate copolymer, carboxylated styrene-butadiene copolymer, cyanoacrylate, glycidyl (meth)acrylate, a polyamide polyamine-epichlorohydrin resin, a silane coupling agent, and phosphatidylethanolamine. According to the present invention, the durability of the road pavement can be extended and maintenance costs can be reduced.

Description

High ductility, quick-hardening and ultra-early strength type cement concrete composition modified by polymer modifier and the construction method for road pavement using the same}

The present invention provides excellent physical strength by including the initial velocity and coarse rigidity binder and the high ductility admixture, and implements the initial velocity and coarse rigidity, thereby significantly shortening the construction period and minimizing the traffic control time. , high ductility is greatly strengthened, and it can effectively cope with drying shrinkage, expansion, and cracking due to temperature change, and it can extend the durability life of road pavement and reduce maintenance costs by greatly improving all characteristics required for concrete pavement. It relates to a high-ductility super-velocity and coarse-strength cement concrete composition and a road pavement construction method using the same.

In general, when manufacturing or paving a concrete structure, cracks due to drying shrinkage occur, and latance occurs due to bleeding on the surface, which has the disadvantages of weak surface strength and poor durability. These cracks in concrete often occur due to various factors such as external environmental factors such as salt damage and deterioration, material properties such as design load, plastic shrinkage or drying shrinkage, mixing conditions, and construction factors. In particular, in road pavement, the bearing force of the pavement layer 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 may be cracked or cracked due to vehicle load, etc. occurs frequently. When cracks occur in the 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 general, road pavement can be divided into asphalt concrete pavement (ascon) and cement concrete pavement.

First, in asphalt concrete pavement, adhesion strength is expressed by mechanical bonding due to the adhesion of the asphalt binder. In particular, in the case of polyurethane-based asphalt concrete pavement, adhesion performance due to the lack of a chemical base that can be attached to the existing pavement is insufficient. It is very poor, and there is a problem in that functions such as mechanical strength and durability are lost at an early stage. In addition, asphalt concrete pavement had problems such as pollution generated during material production, generation of waste asphalt due to premature failure due to lack of rigidity, frequent maintenance and lack of sustainability.

On the other hand, cement concrete pavement exhibits strength by forming a hydrate by the reaction of cement mortar and pozzolan. However, due to lack of flexibility to temperature change, there was a problem in that huge post-maintenance costs occurred due to drying shrinkage cracking, reflection cracking, fatigue cracking, and blow-up.

Accordingly, in order to impart a predetermined ductility property to the physical properties of conventional cement concrete, polymer cement concrete using a polymer resin was used for emergency repair of road pavement, but the surface deteriorated due to the influence of ultraviolet rays, climate and curing temperature, etc. , there was a problem in that durability decreased due to neutralization. In particular, in the case of materials in which latex is added to super-velocity cement, the strength development varies greatly depending on the atmospheric temperature. There was a problem of early damage to the concrete due to the penetration of rainwater into the concrete.

Republic of Korea Patent Registration No. 10-1045877 Republic of Korea Patent Registration No. 10-1160540 Republic of Korea Patent Registration No. 10-1796932

The present invention has been devised to solve the above problems, and one embodiment of the present invention promotes tissue densification and provides excellent physical strength, so that the construction period can be significantly shortened and the traffic control time can be minimized. In addition, it can effectively cope with drying shrinkage, expansion, and cracking according to temperature changes, and is given elastic properties to suppress the blow-up phenomenon of the concrete slab, and by alleviating the brittle fracture properties, An object of the present invention is to provide a high ductility, super-velocity and coarse-strength cement concrete composition capable of extending the durability of pavement, 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 contains 10 to 30% by weight of the initial velocity and coarse-strength binder, 30 to 50% by weight of fine aggregate, 30 to 50% by weight of coarse aggregate, 0.1 to 10% by weight of water, and 0.1 to 10% by weight of a high ductility admixture. including;

The initial velocity and coarse strength binder is based on 100 parts by weight of crude Portland cement, 40 to 70 parts by weight of silicon manganese slag, 10 to 30 parts by weight of gypsum, 10 to 30 parts by weight of calcium sulfoaluminate, 1 to 10 parts by weight of calcium aluminoferite. 1 to 10 parts by weight of zirconium phosphate, 1 to 10 parts by weight of tin oxide, 1 to 10 parts by weight of chlorite, and 0.1 to 5 parts by weight of the astaxanthin-nanodiamond complex;

The high ductility admixture is based on 100 parts by weight of the bisphenol A-type epoxy resin, 40 to 70 parts by weight of an acrylonitrile-methyl (meth)acrylate copolymer, 40 to 70 parts by weight of a carboxylated styrene-butadiene copolymer, cia 10 to 30 parts by weight of noacrylate, 10 to 30 parts by weight of glycidyl (meth)acrylate, 1 to 10 parts by weight of polyamide polyamine-epicrohydrin resin, 1 to 10 parts by weight of a silane coupling agent, and phosphatidylethanol It provides a cement concrete composition with high ductility, initial velocity and coarse strength, comprising 0.1 to 5 parts by weight of an amine.

the zirconium phosphate is a layered zirconium phosphate;

The layered zirconium phosphate is prepared by mixing and adding a zirconium compound, an oxalic acid compound, and phosphoric acid in distilled water in a molar ratio of 1: 2 to 4: 2 to 4 to prepare an aqueous solution; After exchanging and refluxing the aqueous solution at a temperature of 80 to 110 ℃, by cooling to room temperature, generating a layered zirconium phosphate precipitate; and obtaining a layered zirconium phosphate by filtering, washing and drying the layered zirconium phosphate precipitate.

The tin oxide is porous tin dioxide (SnO ₂ );

The porous tin dioxide (SnO ₂ ) is formed by adding and mixing sodium nitrate (NaNO ₃ ) and tin chloride (SnCl ₂ ) in distilled water in a 1: 1 to 2 weight ratio to form a mixture; After evaporating the mixture at a temperature of 75 to 95 ° C. sodium nitrate (NaNO ₃ ), Sn(NO ₃ ) ₂ , preparing a first complex comprising sodium chloride (NaCl); Heating the first complex at a temperature of 400 to 600 ° C. to prepare a second complex comprising sodium nitrate (NaNO ₃ ), tin dioxide (SnO ₂ ), and sodium chloride (NaCl); Washing the second composite to prepare tin dioxide (SnO ₂ ) nanoparticles having a porous structure; and heat-treating the tin dioxide (SnO ₂ ) nanoparticles having the porous structure at a temperature of 650 to 950 ° C. to prepare porous tin dioxide (SnO ₂ );

The astaxanthin-nanodiamond complex is

modifying the surface of the nanodiamond with a carboxyl group; Astaxanthin and the nanodiamond with the surface-modified surface are mixed in a ratio of 1: 4 to 9 by weight and dispersed in distilled water, thereby forming an astaxanthin-nanodiamond complex in which astaxanthin is adsorbed to the nanodiamond; And the astaxanthin-nanodiamond complex is formed and the dispersed distilled water is centrifuged to remove the supernatant, and then the obtained precipitate is dried, thereby preparing the astaxanthin-nanodiamond complex in powder form. It may be manufactured.

In addition, another embodiment of the present invention is a road pavement construction method using the high ductility of the initial velocity and coarse rigidity cement concrete composition,

removing the deteriorated, damaged or contaminated portion of the construction target surface; cleaning the removed area; Primer or blooming treatment on the cleaned area; pouring the high ductility of the high-ductility and coarse-strength cement concrete composition on the primer or blooming-treated upper part; After pouring, the step of tinting to increase the crack induction and slip resistance; Spraying a curing agent to prevent initial plastic cracking by preventing evaporation of moisture in the upper part after the tinting step; And it provides a road pavement construction method comprising the step of curing.

According to the high-ductility and rough-hardness cement concrete composition and the road pavement construction method using the same according to an embodiment of the present invention, the binding force of the hydrate by the pozzolan reaction by including the super-velocity and coarse-stiffness binder and the high ductility admixture Together with the hydrogen bonding power of organic polymers, it promotes tissue densification and has the effect of providing excellent physical strength such as excellent adhesion to existing bridge pavement, flexural strength and compressive strength. In addition, it has the effect of reducing the construction period significantly and minimizing the traffic control time by implementing the initial velocity and roughness. In addition, it is possible to reduce the amount of cement per second required to achieve the same strength, thereby securing price competitiveness.

In addition, elastic properties are given, brittle fracture properties are relieved, high ductility is greatly strengthened, and it can effectively cope with drying shrinkage, expansion and cracking according to temperature change, and blow-up phenomenon of concrete slab has a deterrent effect.

In addition, alkalinity is given to the inside of carbonated concrete to improve corrosion resistance (rust prevention), and as various properties required for concrete road pavement, abrasion resistance, watertightness, adhesion, chemical resistance, waterproofness, rust prevention, neutralization resistance, chloride resistance, temperature change By significantly improving the freeze-thaw resistance, etc., it has the effect of extending the durable life of the road pavement and reducing maintenance costs.

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 30% by weight of the initial velocity and coarse-strength binder, 30 to 50% by weight of fine aggregate, 30 to 50% by weight of coarse aggregate, 0.1 to 10% by weight of water, and 0.1 to 10% by weight of a high ductility admixture. including;

The initial velocity and coarse strength binder is based on 100 parts by weight of crude Portland cement, 40 to 70 parts by weight of silicon manganese slag, 10 to 30 parts by weight of gypsum, 10 to 30 parts by weight of calcium sulfoaluminate, 1 to 10 parts by weight of calcium aluminoferite. 1 to 10 parts by weight of zirconium phosphate, 1 to 10 parts by weight of tin oxide, 1 to 10 parts by weight of chlorite, and 0.1 to 5 parts by weight of the astaxanthin-nanodiamond complex;

The high ductility admixture is based on 100 parts by weight of the bisphenol A-type epoxy resin, 40 to 70 parts by weight of an acrylonitrile-methyl (meth)acrylate copolymer, 40 to 70 parts by weight of a carboxylated styrene-butadiene copolymer, cia 10 to 30 parts by weight of noacrylate, 10 to 30 parts by weight of glycidyl (meth)acrylate, 1 to 10 parts by weight of polyamide polyamine-epicrohydrin resin, 1 to 10 parts by weight of a silane coupling agent, and phosphatidylethanol It provides a cement concrete composition with high ductility, initial velocity and coarse strength, comprising 0.1 to 5 parts by weight of an amine.

According to the high-ductility and coarse-roughness cement concrete composition and the road pavement construction method using the same according to an embodiment of the present invention, the hydrate by the pozzolan reaction includes It promotes the densification of the tissue through the hydrogen bonding strength of organic polymers along with the bonding strength, and has the effect of providing excellent physical strength such as excellent adhesion to existing bridge pavement, flexural strength and compressive strength. In addition, it has the effect of reducing the construction period significantly and minimizing the traffic control time by implementing the initial velocity and roughness. In addition, it is possible to reduce the amount of cement per second required to achieve the same strength, thereby securing price competitiveness.

In addition, elastic properties are given, brittle fracture properties are relieved, high ductility is greatly strengthened, and it can effectively cope with drying shrinkage, expansion and cracking according to temperature change, and blow-up phenomenon of concrete slab has a deterrent effect.

In addition, alkalinity is given to the inside of carbonated concrete to improve corrosion resistance (rust prevention), and as various properties required for concrete road pavement, abrasion resistance, watertightness, adhesion, chemical resistance, waterproofness, rust prevention, neutralization resistance, chloride resistance, temperature change By significantly improving the freeze-thaw resistance, etc., it has the effect of extending the durable life of the road pavement and reducing maintenance costs.

The high ductility initial velocity and coarse rigidity cement concrete composition according to an embodiment of the present invention contains 10 to 30% by weight of primary velocity and coarse rigidity binder, 30 to 50% by weight of fine aggregate, 30 to 50% by weight of coarse aggregate, 0.1 to water 10% by weight and 0.1 to 10% by weight of a high ductility admixture.

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 called coarse aggregates.

The fine aggregate is preferably contained in an amount of 30 to 50% by weight based on the high ductility initial velocity and coarse strength cement concrete composition of the present invention. It is preferable to contain 50% by weight.

It is preferable to contain 10 to 30% by weight of the high-ductility and coarse-strength binder used in the present invention based on the high-ductility and coarse cement-concrete composition of the present invention. When the content of the initial velocity and the coarse-stiffness binder is too small, the possibility of insufficient viscosity and bleeding may increase, and thus the possibility of occurrence of plastic cracks may also increase. In addition, the permeability resistance may decrease due to deterioration of the strength and watertightness of concrete. In addition, when the content of the initial velocity and coarse-strength binder is too large, the viscosity increases, workability decreases, it becomes difficult to control the pot life, the initial strength decreases, and the long-term strength continuously increases due to excessive watertightness increase. Dry shrinkage cracking of structures and pavements may occur.

In addition, the composition of the present invention by a simple method of controlling the content of the initial velocity and crude rigidity binder used in the present invention can implement both the characteristics of the initial velocity and coarse rigidity.

At this time, in the present invention, "short speed" refers to expressing the 7-day-old compressive strength of ordinary Portland cement in 2 to 3 hours; In the present invention, "coarse stiffness" means expressing the compressive strength of the ordinary Portland cement at the age of 3 to 7 days in 1 day.

The initial velocity and coarse strength binder is based on 100 parts by weight of crude Portland cement, 40 to 70 parts by weight of silicon manganese slag, 10 to 30 parts by weight of gypsum, 10 to 30 parts by weight of calcium sulfoaluminate, 1 to 10 parts by weight of calcium aluminoferite. 1 to 10 parts by weight of zirconium phosphate, 1 to 10 parts by weight of tin oxide, 1 to 10 parts by weight of chlorite, and 0.1 to 5 parts by weight of the astaxanthin-nanodiamond complex may be used.

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 cm2/g.

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

The silicon manganese slag functions to provide stable long-term strength expression and water tightness, provide microcrack prevention and shrinkage prevention effects by lowering the heat of hydration, and improve chemical durability to provide excellent salt damage and freeze-thaw resistance.

The silicon manganese slag is produced by dropping molten silicon manganese slag generated in the process of producing silicon manganese through a tundish, and spraying high pressure air into the falling molten silicon manganese slag from a nozzle to disperse the molten silicon manganese slag. The dispersed molten silicon-manganese slag is rapidly cooled by the sprayed high-pressure air and ambient atmosphere, and pulverized to a fineness of 4,500 to 7,500 cm2/g using a ball mill or a fine grinding device can be preferably used.

In addition, the silicon manganese slag is silicon oxide (SiO ₂ ) 30 to 42 wt%, aluminum oxide (Al ₂ O ₃ ) 12 to 24 wt%, calcium oxide (CaO) 12 to 24 wt%, magnesium oxide (MgO) 3 To 9% by weight and manganese oxide (MnO) 14 to 20% by weight can be used more preferably.

The silicon manganese slag is preferably contained in an amount of 40 to 70 parts by weight based on 100 parts by weight of the crude steel portland cement. When the content of the silicon manganese slag is too small, there is a problem that the above-described improvement effect may be insufficient, and when the content of the silicon manganese slag is too large, there is a problem that the initial strength expression may be delayed.

The gypsum functions not only to express excellent initial strength, but also to prevent cracking of concrete and shrinkage of concrete by making the structure dense.

As the gypsum, anhydrite or dihydrate gypsum may be preferably used.

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, the improvement effect may be insufficient, and when the content of the gypsum is too large, there is a problem in that expansion and water resistance may be reduced.

The calcium sulfoaluminate functions to provide fast curing properties.

The calcium sulfoaluminate is preferably contained in an amount of 10 to 30 parts by weight based on 100 parts by weight of the crude Portland cement. If 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 calcium aluminoferrite improves abrasion resistance and fire resistance, and functions to prevent shrinkage and cracking by expressing initial strength and dense tissue.

The calcium aluminoferrite 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 calcium aluminoferite is too small, there is a problem that the above-described improvement effect may be insufficient. .

The zirconium phosphate functions to improve not only excellent strength properties, but also excellent shrinkage reduction and crack control effects, abrasion resistance, rust prevention, chemical resistance, fire resistance, salt damage and freeze-thaw resistance.

By using the zirconium phosphate as a layered zirconium phosphate, it is possible to further improve the above-described effects, and in particular, there is an effect of greatly improving the excellent shrinkage reduction and crack control effect and wear resistance.

More specifically, the layered zirconium phosphate is prepared by mixing and adding a zirconium compound, an oxalic acid compound, and phosphoric acid in distilled water in a molar ratio of 1: 2 to 4: 2 to 4 to prepare an aqueous solution; After exchanging and refluxing the aqueous solution at a temperature of 80 to 110 ℃, by cooling to room temperature, generating a layered zirconium phosphate precipitate; and obtaining a layered zirconium phosphate by filtering, washing and drying the layered zirconium phosphate precipitate.

In this case, the zirconium compound is preferably at least one selected from the group consisting of zirconium nitrate, zirconium acetate, zirconium sulfate, zirconium carbonate, basic zirconium sulfate, zirconium oxysulfate, zirconium oxychloride, hydrates thereof, and mixtures thereof. can; The oxalic acid compound may preferably be at least one selected from the group consisting of oxalic acid dihydrate, ammonium oxalate, ammonium hydrogen oxalate, and mixtures thereof.

The zirconium 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 zirconium phosphate is too small, there is a problem that the above-described improvement effect may be insufficient, and when the content of the zirconium phosphate is too large, the initial strength expression is delayed, or the manufacturing cost is high, which can lower price competitiveness There is a problem.

The tin oxide functions to improve chemical resistance, weather resistance, salt damage and freeze-thaw resistance, and to provide heat resistance, abrasion resistance, crack prevention and shrinkage prevention effects along with an excellent strength expression effect.

The tin oxide is a porous tin dioxide (SnO ₂ ) by using it, and not only can further improve the above-described effects, in particular, improve excellent bending and tensile strength, and chemical resistance, weather resistance, salt damage and freeze-thaw resistance Including, there is an effect of greatly improving the effect of preventing cracks and shrinkage.

More specifically, the porous tin dioxide (SnO ₂ ) is sodium nitrate (NaNO ₃ ) and tin chloride (SnCl ₂ ) in distilled water in a 1: 1 to 2 weight ratio by adding and mixing to form a mixture; After evaporating the mixture at a temperature of 75 to 95 ° C. sodium nitrate (NaNO ₃ ), Sn(NO ₃ ) ₂ , preparing a first complex comprising sodium chloride (NaCl); Heating the first complex at a temperature of 400 to 600 ° C. to prepare a second complex comprising sodium nitrate (NaNO ₃ ), tin dioxide (SnO ₂ ), and sodium chloride (NaCl); Washing the second composite to prepare tin dioxide (SnO ₂ ) nanoparticles having a porous structure; and heat-treating the tin dioxide (SnO ₂ ) nanoparticles having the porous structure at a temperature of 650 to 950 ° C. to prepare porous tin dioxide (SnO ₂ ); .

At this time, the sodium nitrate (NaNO ₃ ), tin dioxide (SnO ₂ ), by washing the second complex containing sodium chloride (NaCl) to prepare tin dioxide (SnO ₂ ) nanoparticles of a porous structure; the sodium nitrate ( NaNO ₃ ) and sodium chloride (NaCl) are dissolved in distilled water, it is possible to wash the second complex with distilled water through a vacuum pump.

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

The chlorite functions to improve abrasion resistance, corrosion resistance and fire resistance, and to provide anti-crack and anti-shrink effects along with an excellent strength expression effect.

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

The astaxanthin-nanodiamond complex not only can effectively cope with drying shrinkage, expansion and cracking according to temperature changes, but also improves durability such as chemical resistance, rust prevention, neutralization resistance, salt damage and freeze-thaw resistance, thereby improving long-term durability function to improve.

The astaxanthin-nanodiamond complex may include: modifying the surface of the nanodiamond with a carboxyl group; Astaxanthin and the nanodiamond with the surface-modified surface are mixed in a ratio of 1: 4 to 9 by weight and dispersed in distilled water, thereby forming an astaxanthin-nanodiamond complex in which astaxanthin is adsorbed to the nanodiamond; And the astaxanthin-nanodiamond complex is formed and the dispersed distilled water is centrifuged to remove the supernatant, and then the obtained precipitate is dried, thereby preparing the astaxanthin-nanodiamond complex in powder form. manufactured, the average particle diameter can be further improved by using the one in the range of 50 to 500 nm.

In this case, the average particle diameter of the nanodiamond may be preferably used in the range of 10 to 300 nm.

In addition, when the astaxanthin and the surface-modified nanodiamonds are mixed in a 1: 4 to 9 weight ratio and dispersed in distilled water, the mixture of the astaxanthin and the surface-modified nanodiamonds is 500 to 10000 It may be added and dispersed in distilled water so as to have a concentration of ppm.

The astaxanthin-nanodiamond complex 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 astaxanthin-nanodiamond complex is too small, there is a problem that the above-described improvement effect may be insufficient. It is difficult to do so, and there is a problem in that price competitiveness may be lowered or strength performance may be lowered.

In addition, the initial velocity and coarse rigidity binder is an additive generally used in the art, and may further include at least one selected from the group consisting of a curing accelerator, a setting retarder, a water reducing agent, a material separation preventing agent, and mixtures thereof. there is.

More specifically, the curing accelerator functions to further activate the hydration reaction of the composition to express compressive strength at an early stage. In consideration of this function, the curing accelerator is preferably contained in an amount of 0.01 to 5 parts by weight based on 100 parts by weight of the crude Portland cement.

In addition, the curing accelerator is generally used in the art, for example, calcium formate, calcium chloride, calcium salt such as calcium nitrate, chloride such as magnesium chloride, magnesium sulfate, sulfate such as aluminum sulfate, potassium hydroxide, sodium hydroxide , carbonates such as sodium carbonate, formic acid or a salt thereof, lithium carbonate, and the like can be used.

The setting delay agent functions to maintain the initial working time and improve workability. In consideration of these functions, the setting retardant is preferably contained in an amount of 0.01 to 5 parts by weight based on 100 parts by weight of the crude Portland cement.

In addition, the setting delay agent is generally used in the art, for example, glucose, glucose, dextrin, sugars such as dextran, gluconic acid, tartaric acid, malic acid, citric acid, citric acid, such as boric acid Acids or salts thereof, aminocarboxylic acids or salts thereof, phosphonic acid or derivatives thereof, polyvinyl alcohol, polyalcohols such as glycerin, and the like can be used.

The water reducing agent functions to temporarily improve fluidity by dispersing the particles by repulsive force between the particles. The water reducing agent is preferably contained in an amount of 0.01 to 5 parts by weight based on 100 parts by weight of the crude Portland cement.

In addition, the water-reducing agent is generally used in the art, for example, a naphthalene-based, melamine-based, polycarboxylic acid-based water-reducing agent may be used. More preferably, it is good to use a polycarboxylic acid-based water reducing agent.

The material separation preventing agent functions to prevent material separation of the composition and improve workability. The material separation preventing agent is preferably contained in an amount of 0.01 to 5 parts by weight based on 100 parts by weight of the crude Portland cement.

In addition, the material separation preventing agent is generally used in the art, for example, methyl cellulose, starch, gum (Gum), etc. may be used. More preferably, it is good to use a starch-based material separation preventing agent with a small decrease in strength.

On the other hand, the high ductility admixture used in the present invention functions to improve the curing time, workability, strength and durability of the high ductility initial velocity and coarse rigidity cement concrete composition of the present invention.

The high-ductility admixture is preferably contained in an amount of 0.1 to 10 wt% in the high-ductility, initial velocity and coarse-strength cement concrete composition of the present invention. When the content of the high-ductility admixture is too small, the improvement effect may be weak, and when the content of the high-ductility admixture is too large, the viscosity is lowered and workability (slump) can be improved, but by delaying the hydration reaction There is a problem in that the initial hardness may be lowered or the manufacturing cost may be increased, thereby lowering price competitiveness.

The high ductility admixture is based on 100 parts by weight of the bisphenol A-type epoxy resin, 40 to 70 parts by weight of an acrylonitrile-methyl (meth)acrylate copolymer, 40 to 70 parts by weight of a carboxylated styrene-butadiene copolymer, cia 10 to 30 parts by weight of noacrylate, 10 to 30 parts by weight of glycidyl (meth)acrylate, 1 to 10 parts by weight of polyamide polyamine-epicrohydrin resin, 1 to 10 parts by weight of a silane coupling agent, and phosphatidylethanol Those containing 0.1 to 5 parts by weight of the amine may be used.

The bisphenol A type epoxy resin functions to improve excellent flexural, tensile and adhesive strength as well as to improve waterproofness and durability.

Hereinafter, the content of other components constituting the high ductility admixture is based on 100 parts by weight of the bisphenol A type epoxy resin.

The acrylonitrile-methyl (meth) acrylate copolymer functions to improve excellent warpage, tensile and adhesion strength as well as excellent crack resistance, shrinkage resistance and durability.

The acrylonitrile-methyl (meth)acrylate copolymer is preferably contained in an amount of 40 to 70 parts by weight based on 100 parts by weight of the bisphenol A-type epoxy resin. When the content of the acrylonitrile-methyl (meth)acrylate copolymer is too small, there is a problem that the above-described improvement effect may be insufficient, and the content of the acrylonitrile-methyl (meth)acrylate copolymer is too high In many cases, there is a problem that the expression of initial strength may be lowered or price competitiveness may be lowered.

The carboxylated styrene-butadiene copolymer not only improves excellent warpage, tensile and adhesive strength, but also improves excellent weather resistance, water resistance, chemical resistance, salt damage and freeze-thaw resistance, crack resistance, shrinkage resistance and durability. .

The carboxylated styrene-butadiene copolymer is preferably contained in an amount of 40 to 70 parts by weight based on 100 parts by weight of the bisphenol A-type epoxy resin. When the content of the carboxylated styrene-butadiene copolymer is too small, there is a problem that the above-described improvement effect may be insufficient, and when the content of the carboxylated styrene-butadiene copolymer is too large, initial strength is expressed There is a problem in that this may be lowered or price competitiveness may be lowered.

The cyanoacrylate functions to improve excellent adhesion strength as well as excellent weather resistance, waterproofness, chemical resistance, crack resistance, shrinkage resistance and durability.

The cyanoacrylate is preferably contained in an amount of 10 to 30 parts by weight based on 100 parts by weight of the bisphenol A-type epoxy resin. When the content of the cyanoacrylate is too small, there is a problem that the above-described improvement effect may be insufficient, and when the content of the cyanoacrylate is too large, there is a problem that workability may be reduced due to high reactivity .

The glycidyl (meth) acrylate functions to improve excellent flexural, tensile and adhesive strength as well as excellent crack resistance, shrinkage resistance and durability.

The glycidyl (meth) acrylate is preferably contained in an amount of 10 to 30 parts by weight based on 100 parts by weight of the bisphenol A-type epoxy resin. When the content of the glycidyl (meth) acrylate is too small, there is a problem that the above-described improvement effect may be insufficient, and when the content of the glycidyl (meth) acrylate is too large, the workability may be reduced There are possible problems.

The polyamide polyamine-epicrohydrin resin improves excellent bending, tensile and adhesion strength, thereby preventing microcracks and preventing shrinkage, as well as improving water resistance, waterproofness, abrasion resistance and durability.

The polyamide polyamine-epichlorohydrin resin is preferably contained in an amount of 1 to 10 parts by weight based on 100 parts by weight of the bisphenol A-type epoxy resin. When the content of the polyamide polyamine-epicrohydrin resin is too small, there is a problem that the above-described improvement effect may be insufficient, and when the content of the polyamide polyamine-epicrohydrin resin is too large, performance improvement effect is difficult to expect, and there is a problem that price competitiveness may be lowered.

The silane coupling agent not only enhances excellent adhesion strength but also functions to improve excellent waterproofness, chemical resistance, crack resistance, shrinkage resistance and durability.

The silane coupling agent is γ-aminopropyltrimethoxysilane, γ-glycidylpropyltrimethoxysilane, vinylmethoxysilane, γ-mercaptopropyltrimethoxysilane, γ-methacryloxypropyltrimethoxy at least one selected from the group consisting of silane, γ-aminopropylmethyl-diethoxysilane, γ-aminopropylmethyl-triethoxysilane, and mixtures thereof; By using the azole silane represented by the following Chemical Formula 1 in a weight ratio of 1: 0.1 to 0.5, the above-described effect can be further improved.

[Formula 1]

In the above formula,

X is -CH ₃ , -NH ₂ , -SH or -SCH ₃ , Y is -NH-, R is -CH ₃ or -CH ₂ CH ₃ , m is an integer from 1 to 12, n is 0 or an integer from 1 to 3.

The silane coupling agent is preferably contained in an amount of 1 to 10 parts by weight based on 100 parts by weight of the bisphenol A-type epoxy 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. , there is a problem that workability may be deteriorated.

The phosphatidylethanolamine functions to improve the compatibility, crack resistance, shrinkage resistance and durability of the composition.

One or more selected from the group consisting of dioleoylphosphatidylethanolamine, dipalmitoylphosphatidylethanolamine, eleostearoylphosphatidylethanolamine, lysophosphatidylethanolamine and mixtures thereof can be preferably used as the phosphatidylethanolamine. there is.

The phosphatidylethanolamine is preferably contained in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of the bisphenol A-type epoxy resin. When the content of the phosphatidylethanolamine is too small, there is a problem that the above improvement effect may be insufficient, and when the content of the phosphatidylethanolamine is too large, it is difficult to expect any further performance improvement effect, and the price competitiveness will be lowered. There are possible problems.

In addition, the high ductility admixture is an additive generally used in the art, and may further include one or more selected from the group consisting of an antifoaming agent, an air entraining agent, and mixtures thereof.

More specifically, the anti-foaming agent functions to further improve strength and durability by reducing the amount of air and removing entrapped air and voids in the concrete. In consideration of this function, the antifoaming agent is preferably contained in an amount of 0.01 to 3 parts by weight based on 100 parts by weight of the bisphenol A-type epoxy resin.

In addition, the anti-foaming agent is generally used in the art, for example, a silicone-based anti-foaming agent, a fatty acid-based anti-foaming agent, an oil-based anti-foaming agent, an ester-based anti-foaming agent, an oxyalkylene-based anti-foaming agent, an alcohol-based anti-foaming agent and the like may be used. The silicone-based antifoaming agent includes dimethyl silicone oil, polyorganosiloxane, fluorosilicone oil, and the like, and the fatty acid-based antifoaming agent includes stearic acid and oleic acid. In addition, the oil-based anti-foaming agent includes kerosene, animal and vegetable oil, castor oil, and the like, and the ester-based anti-foaming agent includes solitol trioleate, glycerol monoricinolate, and the like. In addition, the oxyalkylene-based antifoaming agent includes polyoxyalkylene, acetylene ethers, polyoxyalkylene fatty acid ester, polyoxyalkylenealkylamine, and the like, and the alcohol-based antifoaming agent includes glycol.

The air entraining agent functions to improve workability by improving the dispersibility of the composition. In consideration of these functions, the air entraining agent is preferably contained in an amount of 0.01 to 3 parts by weight based on 100 parts by weight of the bisphenol A-type epoxy resin.

In addition, the air entraining agent is generally used in the art, for example, there are polycarboxylic acid-based, naphthalene-based, melamine-based, and the like. More preferably, the air entraining agent is a polycarboxylic acid-based air entraining agent.

The high ductility initial velocity and coarse rigidity cement concrete composition according to a preferred embodiment of the present invention contains 10 to 30% by weight of primary velocity and coarse rigidity binder, 30 to 50% by weight of fine aggregate, and 30 to 50% by weight of coarse aggregate in a forced mixer. After stirring, 0.1 to 10% by weight of water and 0.1 to 10% by weight of a highly ductile admixture 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 ductility of the initial velocity and coarse rigidity cement concrete composition,

removing the deteriorated, damaged or contaminated portion of the construction target surface; cleaning the removed area; Primer or blooming treatment on the cleaned area; pouring the high ductility of the high-ductility and coarse-strength cement concrete composition on the primer or blooming-treated upper part; After pouring, the step of tinting to increase the crack induction and slip resistance; Spraying a curing agent to prevent initial plastic cracking by preventing evaporation of moisture in the upper part after the tinting step; And it provides a road pavement construction method comprising the step of curing.

More specifically, the step of removing the deteriorated, damaged, or contaminated portion of the construction target surface; cutting and blasting the deteriorated, damaged or contaminated portion of the construction target surface using a crusher, planer, shot blaster, or water jet. can be performed.

In addition, the step of treating the cleaned area with a primer or blooming; to be used to mean an operation of facilitating adhesion of the high-ductility, initial velocity and coarse-strength cement concrete composition according to an embodiment of the present invention to the construction target surface. can

In this case, as the primer material, at least one selected from polyacrylic ester (PAE), epoxy emulsion, ethyl vinyl acetate (EVA), and acrylic emulsion may be selected and used.

In addition, as the blooming material, at least one selected from poly acrylic ester (PAE), epoxy emulsion, ethyl vinyl acetate (EVA) and acrylic emulsion may be selected and used.

In addition, in the curing step, depending on the atmospheric conditions including the temperature, humidity, and wind strength of the site, 1) spraying only the curing agent, or 2) after spraying the curing agent, cover the top with a vinyl or curing cloth and water it. It is recommended to separate the curing steps while maintaining the wet state, or 3) using a vinyl, curing cloth, or a thermal insulation cover after the curing agent is sprayed.

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 ℃ or more), 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.

According to the high-ductility and rough-hardness cement concrete composition and the road pavement construction method using the same according to an embodiment of the present invention, the binding force of the hydrate by the pozzolan reaction by including the super-velocity and coarse-stiffness binder and the high ductility admixture Together with the hydrogen bonding power of organic polymers, it promotes tissue densification and has the effect of providing excellent physical strength such as excellent adhesion to existing bridge pavement, flexural strength and compressive strength. In addition, it has the effect of reducing the construction period significantly and minimizing the traffic control time by implementing the initial velocity and roughness. In addition, it is possible to reduce the amount of cement per second required to achieve the same strength, thereby securing price competitiveness.

In addition, elastic properties are given, brittle fracture properties are relieved, high ductility is greatly strengthened, and it can effectively cope with drying shrinkage, expansion and cracking according to temperature change, and blow-up phenomenon of concrete slab has a deterrent effect.

In addition, alkalinity is given to the inside of carbonated concrete to improve corrosion resistance (rust prevention), and as various properties required for concrete road pavement, abrasion resistance, watertightness, adhesion, chemical resistance, waterproofness, rust prevention, neutralization resistance, chloride resistance, temperature change By significantly improving the freeze-thaw resistance, etc., it has the effect of extending the durable life of the road pavement and reducing maintenance costs.

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>

Preparation of layered zirconium phosphate

Zirconium oxychloride octahydrate, oxalic acid dihydrate, and phosphoric acid were mixed in deionized water in a molar ratio of 1:2.5:2, respectively, to prepare an aqueous solution of 2M concentration. The aqueous solution was exchanged and refluxed at a temperature of 100° C. for 8 hours, and then cooled to room temperature to generate a layered zirconium phosphate precipitate. Layered zirconium phosphate was obtained by filtering, washing and drying the layered zirconium phosphate precipitate. The obtained zirconium phosphate was confirmed to be a layered zirconium phosphate having an average particle diameter of 0.95 µm as a result of SEM observation and analysis of average particle diameter (laser diffraction particle distribution meter, LA-700 manufactured by Horiba).

<Preparation Example 2>

Porous tin dioxide (SnO ₂ ) Produce

Sodium nitrate (NaNO ₃ ) and tin chloride (SnCl ₂ ) in distilled water were added and mixed in a weight ratio of 1: 1.7 to form a mixture; After evaporating water from the mixture at a temperature of 85° C., sodium nitrate (NaNO ₃ ), Sn(NO ₃ ) ₂ , and a first complex including sodium chloride (NaCl) were prepared. Then, the first complex was heat-treated at a temperature of 550 ° C. to prepare a second complex comprising sodium nitrate (NaNO ₃ ), tin dioxide (SnO ₂ ), and sodium chloride (NaCl). Then, by washing and drying the second composite with distilled water, tin dioxide (SnO ₂ ) nanoparticles having a porous structure were prepared. Thereafter, the tin dioxide (SnO ₂ ) nanoparticles having the porous structure were heat-treated at a temperature of 800° C. to prepare porous tin dioxide (SnO ₂ ).

<Production Example 3>

Preparation of Astaxanthin-Nanodiamond Complex

Well-dispersed nanodiamonds with an average particle size of 55 nm, prepared using the particle dispersing process of nanoresources, were put into 60 ml/g of sulfuric acid and nitric acid in a volume ratio of 3:1 and reacted at 140° C. for 12 hours. After the reaction, to prevent volatilization and scattering of the filtrate, it was diluted with an ice bath for about 30 minutes and then centrifuged. Centrifugation was repeated about 10 times until the pH became neutral. The dispersed nanodiamonds thus obtained were dried. Drying was performed in an oven at 100° C. after removing moisture using an evaporator. It was confirmed that the particles obtained above were nanodiamond-COOH through FT-IR.

Astaxanthin (Sigma, USA) and the surface-modified nanodiamond were mixed in a 1: 1 weight ratio, added to distilled water so that the mixture had a concentration of 1600 ppm, and stirred at room temperature for 5 hours to disperse By doing this, astaxanthin was adsorbed to the nanodiamonds to form an astaxanthin-nanodiamond complex.

Thereafter, the astaxanthin-nanodiamond complex was formed and the dispersed distilled water was centrifuged to remove the supernatant, and then the obtained precipitate was dried to obtain a powdery astaxanthin-nanodiamond complex having an average particle diameter of 418 nm. .

<Preparation Example 4>

Preparation of Astaxanthin-Nanodiamond Complex

Well-dispersed nanodiamonds with an average particle size of 55 nm, prepared using the particle dispersing process of nanoresources, were put into 60 ml/g of sulfuric acid and nitric acid in a volume ratio of 3:1 and reacted at 140° C. for 12 hours. After the reaction, to prevent volatilization and scattering of the filtrate, it was diluted with an ice bath for about 30 minutes and then centrifuged. Centrifugation was repeated about 10 times until the pH became neutral. The dispersed nanodiamonds thus obtained were dried. Drying was performed in an oven at 100° C. after removing moisture using an evaporator. It was confirmed that the particles obtained above were nanodiamond-COOH through FT-IR.

Astaxanthin (Sigma, USA) and the surface-modified nanodiamonds were mixed in a 1: 7 weight ratio, added to distilled water so that the mixture had a concentration of 1600 ppm, and stirred at room temperature for 5 hours to disperse By doing so, astaxanthin adsorbed to the nanodiamonds was formed astaxanthin-nanodiamond complexes.

After that, the astaxanthin-nanodiamond complex was formed and the dispersed distilled water was centrifuged to remove the supernatant, and then the obtained precipitate was dried, thereby obtaining an astaxanthin-nanodiamond complex in powder form having an average particle diameter of 243 nm. .

<Examples and Comparative Examples>

The super-velocity and coarse-rigid binders, fine aggregates and coarse aggregates mixed with the components and contents as shown in Table 1 below were put in a forced mixing mixer, and then mixed under dry mixing conditions for 3 minutes, as shown in Table 1 below. A high-ductility admixture and water mixed in components and contents were added at the same time and mixed for 2 minutes to prepare a high-ductility and coarse-hardness cement concrete composition and a composition for comparison.

Category (wt%) Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 fine aggregate 38 38 38 38 38 coarse aggregate 34 34 34 34 34 water 2 2 2 2 2 Super-velocity and coarse-stiffness binder 15 15 15 15 15 (parts by weight) crude steel portland cement
(Powder: 4,730 ㎠/g) 100 100 100 100 100 Silicon Manganese Slag ⁽¹⁾
(Powder: 4,830 ㎠/g) 45 45 45 - 45 anhydrite 17 17 17 17 17 Calcium sulfoaluminate 18 18 18 18 18 Calcium Aluminoferite 8 8 8 - 8 Zirconium Phosphate
[Production Example 1] 4 4 4 - - tin oxide 7
[normal
tin oxide powder] 7
[normal
tin oxide
powder] 7
[Production Example 2] - - chromite 5 5 5 - - Astaxanthin-Nanodiamond Complex 2.8
[Production Example 3] 2.8
[Production Example 4] 2.8
[Production Example 4] - - hardening accelerator 1.1 1.1 1.1 1.1 1.1 setting retardant 0.3 0.3 0.3 0.3 0.3 water reducing agent 0.5 0.5 0.5 0.5 0.5 material separation inhibitor 0.3 0.3 0.3 0.3 0.3 high ductility admixture 11 11 11 11 11 (parts by weight) Bisphenol A type epoxy resin 100 100 100 100 100 Acrylonitrile-methyl(meth)acrylate copolymer 52 52 52 - 52 Carboxylated Styrene-Butadiene Copolymer 48 48 48 - 48 Cyanoacrylate 24 24 24 - - Glycidyl (meth)acrylate 19 19 19 - 19 Polyamide polyamine-epichlorohydrin resin 7 7 7 - - Silane coupling agent_γ-aminopropyltrimethoxysilane 8 4 6 - 8 Silane coupling agent_azole silane [Formula 1-1]
- 4 2 - - Dioleoylphosphatidylethanolamine 2 2 2 - - antifoam 0.5 0.5 0.5 0.5 0.5 air entrainment agent 0.5 0.5 0.5 0.5 0.5

상기 식에서,
X는 -SH이고, Y는 -NH-이고, R은 -CH₃이고, m은 5의 정수이고, n은 1이다. ⁽¹⁾ silicon manganese slag: silicon oxide (SiO ₂ ) 37.5 wt%, aluminum oxide (Al ₂ O ₃ ) 21.1 wt%, calcium oxide (CaO) 18.7 wt%, magnesium oxide (MgO) 7.3 wt% and manganese oxide ( MnO) 15.2 wt% was used.

[Formula 1-1]

In the above formula,
X is -SH, Y is -NH-, R is -CH ₃ , m is an integer of 5, and n is 1.

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

<Test Example 1>

The slump test (degree of kneading) of the high ductility initial velocity and coarse-strength cement concrete compositions according to Examples 1 to 3 of the present invention and the comparative compositions according to Comparative Examples 1 and 2 according to the method specified in KS F 2402 carried out. The slump test is to test the quality of the dough, such as the softness and consistency of concrete, and the larger 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.

Slump (cm) Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Immediately after stirring 25 25 25 25 25 after 20 minutes 23 23 24 19 20 after 30 minutes 21 22 22 12 16 after 40 minutes 18 20 21 7 11

As can be seen in Table 2, it can be seen that the high ductility of the initial velocity and coarse-strength cement concrete compositions according to Examples 1 to 3 is very excellent in workability compared to the comparative compositions according to Comparative Examples 1 and 2 could

<Test Example 2>

In order to more specifically understand the characteristics of the high ductility and coarse cement concrete composition according to the present invention, the high ductility and coarse cement concrete compositions and Comparative Examples 1 and 3 according to Examples 1 to 3 of the present invention The characteristics of the composition for comparison according to 2 were evaluated, and the results are shown in Table 3 below.

Test Items Test Methods Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Drying shrinkage (length change rate (%)) KS F 2424 0.020 0.015 0.012 0.44 0.18 Compressive strength (MPa)_12 hours KS F 2405 17 19 20 9 13 Compressive strength (MPa)_28 days KS F 2405 28 28 31 17 19 Flexural strength (MPa)_12 hours KS F 2405 6.3 6.5 6.8 2.2 3.2 Flexural strength (MPa)_28 days KS F 2405 9.5 9.6 9.8 4.8 6.1 Adhesive strength (MPa)_12 hours KS F 2762 2.8 3.1 3.3 0.9 1.5 Adhesive strength (MPa)_28 days KS F 2762 3.7 3.8 4.1 1.6 2.0 Salt penetration resistance (coulomb) KS F 2711 761 758 733 1352 956 Freeze-thaw resistance (%) KS F 2456 90 93 94 69 82 Wear resistance (mm) ASTM C 779 0.09 0.07 0.05 0.19 0.18 crack resistance AASHTO PP34-98 no cracks no cracks no cracks crack generation no cracks weight change rate
(%) Hydrochloric acid Japanese industrial standard draft
[Method of testing chemical resistance by solution immersion of concrete] -0.5 -0.2 -0.2 -1.3 -0.9 sulfuric acid -0.2 -0.1 -0.05 -0.9 -0.7 sodium hydroxide 0.2 0.2 0 1.8 0.5 Rust rate (%) KS F 2561 91 92 95 70 79 Absorption rate (%) KS F 4004 0.3 0.2 0.2 3.4 1.8

As can be seen in Table 3, the high ductility of the initial velocity and coarse-strength cement concrete compositions according to Examples 1 to 3 had a length change rate according to drying shrinkage, compared to the comparative compositions according to Comparative Examples 1 and 2, I could see that there was little. In addition, the high ductility initial velocity and coarse rigidity cement concrete compositions according to Examples 1 to 3 have superior compressive strength, flexural strength and adhesion strength, compared to the comparative composition according to Comparative Example 1; It was confirmed that it had excellent salt penetration resistance, freeze-thaw resistance, abrasion resistance, chemical resistance, rust prevention rate and low water absorption.

As described above, those skilled in the art to which the present invention pertains will 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 equivalents.

Claims (5)

10 to 30% by weight of the initial velocity and coarse-strength binder, 30 to 50% by weight of fine aggregate, 30 to 50% by weight of coarse aggregate, 0.1 to 10% by weight of water, and 0.1 to 10% by weight of a high ductility admixture;
The initial velocity and coarse rigidity binder is
Based on 100 parts by weight of crude Portland cement, 40 to 70 parts by weight of silicon manganese slag, 10 to 30 parts by weight of gypsum, 10 to 30 parts by weight of calcium sulfoaluminate, 1 to 10 parts by weight of calcium aluminoferite, 1 to 10 parts by weight of zirconium phosphate 1 to 10 parts by weight of tin oxide, 1 to 10 parts by weight of chlorite, and 0.1 to 5 parts by weight of the astaxanthin-nanodiamond complex;
The high ductility admixture is
Based on 100 parts by weight of the bisphenol A-type epoxy resin, 40 to 70 parts by weight of an acrylonitrile-methyl (meth)acrylate copolymer, 40 to 70 parts by weight of a carboxylated styrene-butadiene copolymer, 10 to cyanoacrylate 30 parts by weight, 10 to 30 parts by weight of glycidyl (meth)acrylate, 1 to 10 parts by weight of polyamide polyamine-epichlorohydrin resin, 1 to 10 parts by weight of a silane coupling agent, and 0.1 to 5 parts by weight of phosphatidylethanolamine High-ductility, initial velocity and coarse-strength cement concrete composition, characterized in that it comprises a part.
According to claim 1,
the zirconium phosphate is a layered zirconium phosphate;
The layered zirconium phosphate is
Preparing an aqueous solution by mixing and adding a zirconium compound, an oxalic acid compound, and phosphoric acid to distilled water in a molar ratio of 1: 2 to 4: 2 to 4;
After exchanging and refluxing the aqueous solution at a temperature of 80 to 110 ℃, by cooling to room temperature, generating a layered zirconium phosphate precipitate; and
Obtaining a layered zirconium phosphate by filtering, washing and drying the layered zirconium phosphate precipitate; high ductility and coarse cement concrete composition, characterized in that it is prepared by a manufacturing method comprising a.
According to claim 1,
The tin oxide is porous tin dioxide (SnO ₂ );
The porous tin dioxide (SnO ₂ ) is formed by adding and mixing sodium nitrate (NaNO ₃ ) and tin chloride (SnCl ₂ ) in distilled water in a 1: 1 to 2 weight ratio to form a mixture; After evaporating the mixture at a temperature of 75 to 95 ° C. sodium nitrate (NaNO ₃ ), Sn(NO ₃ ) ₂ , preparing a first complex comprising sodium chloride (NaCl); Heating the first complex at a temperature of 400 to 600 ° C. to prepare a second complex comprising sodium nitrate (NaNO ₃ ), tin dioxide (SnO ₂ ), and sodium chloride (NaCl); Washing the second composite to prepare tin dioxide (SnO ₂ ) nanoparticles having a porous structure; And heat-treating the tin dioxide (SnO ₂ ) nanoparticles of the porous structure at a temperature of 650 to 950 ° C. to prepare porous tin dioxide (SnO ₂ ) High ductility, characterized in that it is prepared by a manufacturing method comprising a of Cement Concrete Composition with Cement Concrete.
According to claim 1,
The astaxanthin-nanodiamond complex is
modifying the surface of the nanodiamond with a carboxyl group;
Astaxanthin and the nanodiamond with the surface-modified surface are mixed in a ratio of 1: 4 to 9 by weight and dispersed in distilled water, thereby forming an astaxanthin-nanodiamond complex in which astaxanthin is adsorbed to the nanodiamond; and
The astaxanthin-nanodiamond complex is formed and the dispersed distilled water is centrifuged to remove the supernatant, and then the obtained precipitate is dried, thereby preparing the astaxanthin-nanodiamond complex in powder form. A high-ductility and coarse cement concrete composition, characterized in that
As a road pavement construction method using the high ductility initial velocity and coarse rigidity cement concrete composition according to any one of claims 1 to 4,
removing the deteriorated, damaged or contaminated portion of the construction target surface; cleaning the removed area; Primer or blooming treatment on the cleaned area; pouring the high ductility initial velocity and coarse rigidity cement concrete composition on the primer or blooming-treated upper part; After pouring, the step of tinting to increase the crack induction and slip resistance; Spraying a curing agent to prevent initial plastic cracking by preventing evaporation of moisture in the upper part after the tinting step; And road pavement construction method comprising the step of curing.