KR101232072B1 - Color polymer cement concrete composite, concrete pavement method and and repairing method of concrete structure using the composite - Google Patents

Abstract

PURPOSE: A color polymer cement concrete composite is provided to improve workability, durability, strength and salt resistance of a concrete by using a polymer emulsion and cement binder. CONSTITUTION: A color polymer cement concrete composite comprises 5-30 weight% of a cement-based binder which comprises a general Portland cement, 30-60 weight% of a fine aggregate, 25-55 weight% of a coarse aggregate, 0.1-7 weight% of a water, 0.1-15 weight% of a polymer emulsion, and 0.1-15 weight% of a pigment. The polymer emulsion comprises 80-99.9 weight% of a styrene-butadiene emulsion, 0.01-10 weight% of a styrene/acryl emulsion, 0.01-10 weight% of a polyethyleneglycol monomethacrylate, 0.01-10 weight% of a methacrylic acid ester, and 0.01-10 weight% of a butyl acrylate.

Description

Color polymer cement concrete composite, concrete pavement method and maintenance method of concrete structure {color polymer cement concrete composite, concrete pavement method and and repairing method of concrete structure using the composite}

The present invention relates to a polymer cement concrete composition, a concrete pavement method and a maintenance method of a concrete structure using the same, and more particularly, the pavement of the concrete structure such as road surface, bridge bridge, concrete slab of the bridge, lower bridge, etc. The present invention relates to a polymer cement concrete composition that can be used in construction and to produce various colors, a concrete pavement method, and a maintenance method of a concrete structure.

Concrete structures, in particular, concrete slabs of bridges, road surfaces, and lower parts of bridges are cracked in concrete due to deterioration. As time passes, the compressive strength of concrete and tensile strength of reinforcing bars gradually decrease, and exposed through cracks. Concrete is neutralized and corrosion of rebar occurs. If the corrosion of the reinforcing bar becomes more severe, the concrete structure may eventually collapse. Therefore, when the concrete structure is deteriorated and cracks occur, it is necessary to repair the deteriorated portion as soon as possible. Polymer cement mortar is widely used in repair work to repair and reinforce such corrosion or erosion.

Recently, polymer cement concrete with SBR (Styrene Butadiene Rubber) latex has been developed in bridge bridge pavement and concrete slab of bridge.

However, SBR latex-modified concrete has a problem of attaching concrete to work tools during finishing work that smooths the surface of concrete after pouring concrete due to the characteristic of latex having a very high viscosity. There is a problem in construction such that the initial plastic crack occurs during the operation, and the long-term crack occurs over time as short as about 30 minutes. In addition, the use of a high polymer-cement ratio has led to material cost increases.

In addition, while the SBR latex modified concrete is excellent in strength and durability, when used in bridge overlaid pavement, the freezing of the winter pavement layer frequently occurs and the viscosity is high, so that the concrete adheres to the work tool after the concrete is placed. In addition, there are problems in construction, such as initial plastic cracking and long-term cracking, and a large amount of polymer incorporation, which inevitably leads to an increase in construction cost and causes a winter accident.

The problem to be solved by the present invention is to increase the pot life by adding a polymer emulsion to ensure a sufficient working time to improve workability, while reducing the dry shrinkage and suppress the initial crack, while improving the strength and durability, The present invention provides a polymer cement concrete composition capable of producing various colors, a concrete pavement method, and a maintenance method of a concrete structure.

The present invention is usually 5 to 30% by weight cement-based binder containing portland cement, 30 to 60% by weight fine aggregate, 25 to 55% by weight coarse aggregate, 0.1 to 7% by weight water, 0.1 to 15% by weight polymer emulsion and 0.01% pigment To 5% by weight, wherein the polymer emulsion is 80 to 99.9% by weight of a styrene-butadiene emulsion, 0.01 to 10% by weight of a styrene / acrylic emulsion, 0.01 to 10% by weight of polyethylene glycol monomethacrylate, and 0.01 to 10% of a metal methacrylate ester. It provides a color polymer cement concrete composition comprising 10% by weight and 0.01 to 10% by weight of butyl acrylate.

The polymer emulsion may further comprise 0.01 to 10% by weight of acrylamide polymer.

The cement-based binder may include 70 to 99% by weight of Portland cement, 0.1 to 15% by weight of gypsum, 0.1 to 15% by weight of blast furnace slag, 0.01 to 15% by weight of metakaolin and 0.001 to 5% by weight of lithium sulfate.

The cement-based binder may further comprise 0.001 to 5% by weight of at least one material selected from polyvinyl alcohol, polyacrylamide, methyl cellulose, starch and gum.

The pigment is preferably at least one inorganic pigment selected from titanium oxide, red iron oxide, yellow iron oxide, chromium oxide (Cr ₂ O ₃ ), purple iron oxide, black iron oxide and carbon black.

In addition, the present invention, the chipping step of removing the surface layer, irregularities, latencies and impurities of the concrete slab using a shot blaster, a planer or a hand water jet, and applying a primer or blooming on top of the chipped surface Performing the step, laying the color polymer cement concrete composition on the site where the primer is applied or blooming, and using a tinning machine to prevent slipping while the color polymer cement concrete composition is not cured. Stabilizing the surface and preventing cracking by dry shrinking and spraying a curing agent on top of the colored polymer cement composition, wherein the primers are styrene butadiene rubber latex, polyacrylic ester, acrylic and ethylene Write down your choice from vinyl acetate It also provides a concrete pavement method, characterized in that any one material.

In addition, the present invention, by removing the impurity or deterioration site by chipping the site where the concrete structure is deteriorated or attached to the impurity using a crusher and waterjet, and applying a primer (primer) to the site where the impurity or deterioration site is removed And restoring a cross section of the site from which impurities or deterioration sites have been removed by pouring the color polymer cement concrete composition and applying a surface protector on top of the poured color polymer cement concrete composition, wherein the primer Is a styrene butadiene rubber latex, polyacrylic ester, acrylic and ethylene vinyl acetate provides a maintenance method of a concrete structure, characterized in that at least one material selected from.

The surface protecting agent is 80 to 99.9% by weight of styrene-butadiene emulsion, 0.1 to 10% by weight of styrene / acrylic emulsion, 0.01 to 10% by weight of polyethylene glycol monomethacrylate, 0.01 to 10% by weight of metal acrylate ester and butyl acrylate It may be a material comprising 0.01 to 10% by weight, or at least one material selected from styrene butadiene rubber latex, poly acrylic ester, acrylic and ethylene vinyl acetate.

According to the present invention, by using a polymer emulsion comprising styrene-butadiene emulsion, styrene / acrylic emulsion, polyethylene glycol monomethacrylate, metal acrylate ester and butyl acrylate, and cement-based binder, improve the workability of concrete and , Improve the durability of the concrete, in particular, it is effective to reduce the defects of the concrete by improving the bending strength, tensile strength, initial strength, long-term strength, salt resistance and freeze-thawing resistance.

By adding the polymer emulsion to extend the pot life, it is possible to sufficiently secure the finishing work time to improve workability, and to reduce the dry shrinkage and to suppress the initial cracking while improving strength and durability.

In addition, the use of cement-based binders usually include portland cement, gypsum, blast furnace slag, metakaolin, and lithium sulfate, thereby improving long-term strength expression, durability, salt resistance, and freeze-thawing resistance.

In addition, when the color polymer cement concrete composition is prepared, an effect of improving the visibility of concrete can be obtained by adding a pigment.

Hereinafter, preferred embodiments of the present invention will be described in detail. However, the following embodiments are provided to those skilled in the art to fully understand the present invention, and may be modified in various forms, and the scope of the present invention is limited to the embodiments described below. It doesn't happen.

Color polymer cement concrete composition according to a preferred embodiment of the present invention is 5-30% by weight cement-based binder, 30-60% by weight fine aggregate, 25-55% by weight coarse aggregate, 0.1-7% by weight water, 0.1-15% by weight polymer emulsion % And 0.01 to 5% by weight pigment.

Aggregates are divided into fine aggregates and coarse aggregates. In the following, fine particles having a particle diameter of 5 mm or less are called fine aggregates, and fine particles larger than 5 mm are classified as coarse aggregates. The fine aggregate is preferably contained in the color polymer cement concrete composition 30 to 60% by weight, and the coarse aggregate is preferably contained in the color polymer cement concrete composition 25 to 55% by weight.

The pigment is for imparting an aesthetic or identification function of the color polymer cement concrete composition, and various pigments may be used, and inorganic pigments are particularly preferable. The inorganic pigment may include titanium oxide (white), red iron oxide, yellow iron oxide, chromium oxide (Cr ₂ O ₃ ), purple iron oxide, black iron oxide, carbon black, and the like, and the pigment may include the color polymer cement concrete composition. It is preferable that 0.01-5 weight% is contained in.

When the content of the cement-based binder exceeds 30% by weight based on the total color polymer cement concrete composition, cracking may occur due to dry shrinkage, and the like, and the strength and durability may decrease when the content of the cement-based binder is less than 5% by weight. have.

The cement-based binder may usually comprise 70 to 99% by weight of Portland cement, 0.1 to 15% by weight of gypsum, 0.1 to 15% by weight of blast furnace slag, 0.01 to 15% by weight of metakaolin and 0.001 to 5% by weight of lithium sulfate. The cement-based binder may further comprise 0.001 to 5% by weight of at least one material selected from polyvinyl alcohol, polyacrylamide, methyl cellulose, starch and gum. In addition, the cement-based binder may further comprise 0.01 to 3% by weight of a water reducing agent for lowering the water-cement ratio to allow early strength to be expressed.

It is preferable to use the ordinary portland cement as defined in KS. The ordinary portland cement is preferably contained 70 to 99% by weight in the cement-based binder.

The gypsum is used for early strength development. Gypsum may use anhydrous gypsum or dihydrate gypsum. The gypsum is preferably contained in 0.1 to 15% by weight in the cement-based binder. When the content of gypsum is increased, it shows a fast curing property. If the content is less than 0.1% by weight, the early strength improvement effect of the color polymer cement concrete composition may be insignificant. Physical properties can be obtained but workability may be degraded.

The blast furnace slag is used to improve latent hydraulic properties, long-term strength development and durability. Increasing the blast furnace slag content decreases the initial strength, but increases the long-term strength development and durability. The blast furnace slag is preferably contained 0.1 to 15% by weight based on the cement-based binder.

The metakaolin is used to improve the workability by sufficiently securing the finishing work time to smooth the surface of the poured color polymer cement concrete composition by improving the strength and durability and extending the concrete work time. Metakaolin is made of mixed materials by specially treating kaolin, which can be widely used in fillers, refractory materials, rubber, paints, chemicals, pharmaceuticals, and the like. Metakaolin is a mixed material produced by thermally activating high-quality kaolin, and is rich in kaolin, which is a raw material of metakaolin, in Korea. Moreover, metakaolin is a stable material because it is produced by good management control, with very little change in physical and chemical properties. Metakaolin reacts with water to show pozzolanic reactivity upon hydration. Metakaolin generates ettringite due to the fast reaction rate and increases the initial strength of concrete by activating C ₃ S in cement, and the pores between particles are dense due to the calcium hydroxide and pozzolanic reaction of cement. To increase the effect. The metakaolin is preferably contained in an amount of 0.01 to 15% by weight based on the cement-based binder. If the content of the metakaolin is less than 0.01% by weight it may be difficult to expect the effect of sufficient initial strength expression and improved durability, if it exceeds 15% by weight it is difficult to expect further increase in strength and durability is not economical.

The lithium sulfate acts as a catalyst to facilitate the initial hydration of the cement-based binder to allow the color polymer cement concrete composition to develop strength early. The lithium sulfate is an accelerator, and other accelerators include calcium salts such as calcium formate, calcium chloride and calcium nitrate, chlorides such as magnesium chloride, sulfates, potassium hydroxide, sodium hydroxide, carbonates, formic acid or salts thereof, and lithium carbonates. Although it can be used, the accelerators have a problem in that the early solubility time is delayed due to low solubility, and lithium sulfate is particularly preferable since there are almost no such problems. Lithium sulphate has a solubility of 300 times or more than other accelerators and has the advantage of shortening the early strength development time. The lithium sulfate is preferably contained 0.001 to 5% by weight based on the cement-based binder.

The cement-based binder may further include at least one material selected from polyvinyl alcohol, polyacrylamide, methyl cellulose, starch and gum. At least one material selected from polyvinyl alcohol, polyacrylamide, methyl cellulose, starch and gum is used as a material separation inhibitor to prevent material separation of the cement-based binder and to improve workability. Examples of the material separation inhibitor include polyvinyl alcohol, polyacrylamide, methyl cellulose, starch, gum, and the like, but it is more preferable to use a starch-based material separation inhibitor having a small decrease in strength. The at least one material selected from polyvinyl alcohol, polyacrylamide, methyl cellulose, starch and gum is preferably contained in the cement binder in an amount of 0.001 to 5% by weight.

In addition, the cement-based binder may further include a reducing agent to reduce the water-cement ratio of the color polymer cement concrete composition, the reducing agent is preferably contained in the cement-based binder 0.01 to 3% by weight. The addition of the water reducing agent can develop initial strength, reduce the water-cement ratio, thereby improving resistance to freeze-thawing and improving durability. Examples of the water reducing agent include naphthalene-based, melamine-based, and polycarboxylic acid-based water reducing agents, but more preferably, polycarboxylic acid-based water reducing agents are used.

The polymer emulsion is used to reduce the viscosity and improve the performance of the color polymer cement concrete, styrene-butadiene emulsion 80 to 99.9% by weight, styrene / acrylic emulsion 0.01 to 10% by weight, polyethylene glycol monomethacrylate 0.01 to 10% by weight %, 0.01-10 weight% of metal acrylate esters, and 0.01-10 weight% of butylacrylates. The polymer emulsion may further comprise 0.01 to 10% by weight of acrylamide polymer. In addition, the polymer emulsion may further comprise 0.001 to 5% by weight of an antifoaming agent. In addition, the polymer emulsion may further comprise 0.001 to 5% by weight of an air entrainer.

The styrene-butadiene (SB) emulsion is used to improve the strength and durability of the composition. The styrene-butadiene emulsion is preferably contained in the polymer emulsion of 80 to 99.9% by weight. When the content of the styrene-butadiene emulsion is less than 80% by weight, the effect of improving strength and durability may be lowered. When the content of the styrene-butadiene emulsion is more than 99.9% by weight, the effect of improving the strength and durability is not excellent but economical.

The styrene / acrylic emulsion is used to improve the adhesion and flexural toughness of the composition. The styrene / acrylic emulsion is an emulsion containing both styrene and acrylic components. The styrene / acrylic emulsion is preferably contained in 0.01 to 10% by weight of the polymer emulsion. When the content of the styrene / acrylic emulsion exceeds 10% by weight, the adhesion and bending toughness of the color polymer cement concrete composition may be improved, but the viscosity may be increased, resulting in poor workability and low price competitiveness, and the content of the styrene / acrylic emulsion is 0.01. If the weight percentage is less than the flexural toughness and adhesion improvement effect of the color polymer cement concrete composition may be weak.

The polyethylene glycol monomethacrylate is included to improve hydrophilicity and dispersibility. The polyethylene glycol monomethacrylate is preferably contained in 0.01 to 10% by weight in the polymer emulsion. When the content of the polyethylene glycol monomethacrylate exceeds 10% by weight, the viscosity of the color polymer cement concrete composition may be lowered, so that material separation may occur easily and the price competitiveness may be reduced, and the content of the polyethylene glycol monomethacrylate is 0.01% by weight. If it is less than%, the hydrophilicity and dispersibility may fall, and workability may fall.

The methacrylic acid ester is used to improve adhesion and flexural toughness. The methacrylic acid ester is preferably contained in the polymer emulsion 0.01 to 10% by weight. When the content of the methacrylic acid ester is more than 10% by weight, the adhesion and bending toughness of the color polymer cement concrete composition is improved, but the price competitiveness may be lowered. When the content of the methacrylic acid ester is less than 0.01% by weight, the color polymer cement Flexural toughness and adhesion improvement effect of the concrete composition may be weak.

The butyl acrylate is also referred to as butyl acrylate, and is an ester of acrylic acid and an alcohol (butyl alcohol). When the polymer is not a polymer, the butyl acrylate is referred to as a monomer (monomer, monomer). Butyl acrylate is used for the synthesis of soft polymers, and ethyl, hexyl, etc. may also be used. In addition, since it is well mixed with concrete, sufficient strength can be expressed, and curing time can be shortened even at low temperature or in water, thereby reducing the process time. The butyl acrylate is preferably contained in the polymer emulsion 0.01 to 10% by weight. If the content of the butyl acrylate is less than 0.01% by weight, the effect of improving the adhesion performance may be insignificant. If the content is more than 10% by weight, the adhesion performance is improved and the viscosity is small, the workability is good, but it is uneconomical, and the price may be lowered. have.

The acrylamide polymer is used to improve adhesion and adhesion strength, and the acrylamide polymer is preferably contained in the polymer emulsion 0.01 to 10% by weight. When the content of the acrylamide polymer is less than 0.01% by weight, the adhesive performance is lowered, so that material separation is easy to occur, and when the content is more than 10% by weight, the adhesion performance is improved and the viscosity is decreased, so that the workability is good but it is uneconomical. Can fall.

The antifoaming agent is used to remove the pores in the concrete to increase the strength and durability of the concrete, it is preferable to add 0.001 to 5% by weight to the polymer emulsion. As the antifoaming agent, generally known materials such as alcoholic antifoaming agents, silicone antifoaming agents, fatty acid antifoaming agents, oil antifoaming agents, ester antifoaming agents, oxyalkylene antifoaming agents and the like can be used. The silicone antifoaming agent includes dimethylsilicone oil, polyorganosiloxane, fluorosilicone oil and the like, and the fatty acid antifoaming agent includes stearic acid and oleic acid. The oil-based antifoaming agents include kerosene, animal and vegetable oils, castor oil and the like, and the ester-based antifoaming agents include sorbitol trioleate and glycerol monoricinoleate. The oxyalkylene antifoaming agents include polyoxyalkylene, acetylene ethers, polyoxyalkylene fatty acid esters, polyoxyalkylene alkylamines, and the like. The alcoholic antifoaming agents include glycol and the like.

The air entrainer is used to improve workability by improving dispersibility of the color polymer cement concrete composition. The air entrainer may be polycarboxylic acid, naphthalene or melamine, but a polycarboxylic acid air entrainer is preferable. The air entrainer is preferably contained in 0.001 to 5% by weight in the polymer emulsion.

Color polymer cement concrete composition according to a preferred embodiment of the present invention after stirring 5-30% by weight of cement-based binder, 30-60% by weight of fine aggregate and 25-55% by weight of coarse aggregate in a forced mixer, and then 0.1-7% by weight of water. 0.1-15 weight% of a polymer emulsion and 0.01-5 weight% of a pigment are further mixed, and it can manufacture by stirring for 2-3 minutes.

Concrete pavement method according to a preferred embodiment of the present invention, using a shot blaster, flattener or hand waterjet chipping step of removing the surface layer, irregularities, latencies and impurities of the concrete slab, and primer (top) on the chipped surface to apply or bloom the primer), to install the color polymer cement concrete composition on the site where the primer is applied or blooming, and to prevent slipping in the uncured state of the color polymer cement concrete composition Tying using a tiening machine to stabilize the surface and to prevent cracking by dry shrinking; and spraying a curing agent on top of the tinned color polymer cement composition. The primer may be at least one material selected from styrene butadiene rubber latex, poly acrylic ester, acrylic and ethylene vinyl acetate.

The color polymer cement concrete composition is 5-30% by weight cement-based binder, 30-60% by weight fine aggregate, 25-55% by weight coarse aggregate, 0.1-7% by weight water, 0.1-15% by weight polymer emulsion and 0.01-5% by weight pigment. Contains%

The polymer emulsion may be 80 to 99.9 wt% of a styrene-butadiene emulsion, 0.01 to 10 wt% of a styrene / acrylic emulsion, 0.01 to 10 wt% of polyethylene glycol monomethacrylate, 0.01 to 10 wt% of a metal acrylate ester, and 0.01 butyl acrylate. It contains -10 weight%. The polymer emulsion may further comprise 0.01 to 10% by weight of acrylamide polymer. In addition, the polymer emulsion may further comprise 0.001 to 5% by weight of an antifoaming agent. In addition, the polymer emulsion may further comprise 0.001 to 5% by weight of an air entrainer.

The cement-based binder may include 70 to 99% by weight of Portland cement, 0.1 to 15% by weight of gypsum, 0.1 to 15% by weight of blast furnace slag, 0.01 to 15% by weight of metakaolin and 0.001 to 5% by weight of lithium sulfate. The cement-based binder may further comprise 0.001 to 5% by weight of at least one material selected from polyvinyl alcohol, polyacrylamide, methyl cellulose, starch and gum. In addition, the cement-based binder may further comprise 0.01 to 3% by weight of a water reducing agent for lowering the water-cement ratio to allow early strength to be expressed.

The pigment is preferably at least one inorganic pigment selected from titanium oxide, red iron oxide, yellow iron oxide, chromium oxide (Cr ₂ O ₃ ), purple iron oxide, black iron oxide and carbon black.

The tinning machine may be a longitudinally inclined tanning machine or a transversely inclined tanning machine. An example of the tinning machine may be a longitudinal tanning apparatus described in Korean Patent Registration No. 10-1187558, filed and registered by the applicant of the present invention.

The blooming is carried out to facilitate the adhesion of the color polymer cement concrete composition to the chipped surface area, and means a process of applying cement paste or cement mortar to the chipped surface area. The cement paste can usually be Portland cement paste. The cement mortar usually includes portland cement and fine aggregate, and the ordinary portland cement and fine aggregate may be mixed in a weight ratio of 1: 1 to 1: 5.

Maintenance method of a concrete structure according to a preferred embodiment of the present invention, the step of removing the impurity or deterioration site by chipping the concrete structure deteriorated or attached to the impurity using a crusher and a waterjet, and Applying a primer to the removed site, pouring the color polymer cement concrete composition to recover a cross section of the site from which impurities or deteriorated sites are removed, and a surface protector on top of the poured color polymer cement concrete composition Applying a step.

Hereinafter, the concrete structure is used as a meaning including all structures made of concrete as structures of road roads, bridge bridges, concrete slabs of bridges, lower bridges, and the like.

The color polymer cement concrete composition is 5-30% by weight cement-based binder, 30-60% by weight fine aggregate, 25-55% by weight coarse aggregate, 0.1-7% by weight water, 0.1-15% by weight polymer emulsion and 0.01-5% by weight pigment. Contains%

The polymer emulsion may be 80 to 99.9 wt% of a styrene-butadiene emulsion, 0.01 to 10 wt% of a styrene / acrylic emulsion, 0.01 to 10 wt% of polyethylene glycol monomethacrylate, 0.01 to 10 wt% of a metal acrylate ester, and 0.01 butyl acrylate. It contains -10 weight%. The polymer emulsion may further comprise 0.01 to 10% by weight of acrylamide polymer. In addition, the polymer emulsion may further comprise 0.001 to 5% by weight of an antifoaming agent. In addition, the polymer emulsion may further comprise 0.001 to 5% by weight of an air entrainer.

The cement-based binder may include 70 to 99% by weight of Portland cement, 0.1 to 15% by weight of gypsum, 0.1 to 15% by weight of blast furnace slag, 0.01 to 15% by weight of metakaolin and 0.001 to 5% by weight of lithium sulfate. The cement-based binder may further comprise 0.001 to 5% by weight of at least one material selected from polyvinyl alcohol, polyacrylamide, methyl cellulose, starch and gum. In addition, the cement-based binder may further comprise 0.01 to 3% by weight of a water reducing agent for lowering the water-cement ratio to allow early strength to be expressed.

The pigment is preferably at least one inorganic pigment selected from titanium oxide, red iron oxide, yellow iron oxide, chromium oxide (Cr ₂ O ₃ ), purple iron oxide, black iron oxide and carbon black.

The primer may be at least one material selected from styrene butadiene rubber latex, poly acrylic ester, acrylic and ethylene vinyl acetate.

The surface protecting agent is 80 to 99.9% by weight of styrene-butadiene emulsion, 0.1 to 10% by weight of styrene / acrylic emulsion, 0.01 to 10% by weight of polyethylene glycol monomethacrylate, 0.01 to 10% by weight of metal acrylate ester and butyl acrylate It may be a material comprising 0.01 to 10% by weight, or at least one material selected from styrene butadiene rubber latex, poly acrylic ester, acrylic and ethylene vinyl acetate.

Hereinafter, embodiments of the color polymer cement concrete composition according to the present invention will be described in more detail, and the present invention is not limited to the following examples.

≪ Example 1 >

17.64 wt% of cement-based binder, 45 wt% of fine aggregate and 31 wt% of coarse aggregate were added to a forced mixer and stirred, followed by further mixing 3 wt% of water, 3 wt% of polymer emulsion, and 0.36 wt% of pigment, followed by stirring for 2 minutes. Color polymer cement concrete composition was prepared. The pigment used red iron oxide.

In this case, the cement-based binder is usually used by mixing 86.70% by weight of Portland cement, 2.04% by weight of gypsum, blast furnace slag 5.10% by weight, metakaolin 5.10% by weight, lithium sulfate 0.42% by weight, water reducing agent 0.42% by weight and methyl cellulose 0.22% by weight. It was. The water reducing agent used a polycarboxylic acid-based water reducing agent.

The polymer emulsion is 95% by weight of styrene-butadiene emulsion, 2% by weight of styrene / acrylic emulsion, 0.5% by weight of polyethylene glycol monomethacrylate, 0.5% by weight of metal acrylic acid ester, 0.5% by weight of butyl acrylate, 0.5% of acrylamide polymer %, Antifoam 0.5% by weight and air entrainer 0.5% by weight were used in combination. The antifoaming agent was a silicone antifoaming agent, and the air entrainer was a polycarboxylic acid air entrainer.

<Example 2>

17.64 wt% of cement-based binder, 45 wt% of fine aggregate and 31 wt% of coarse aggregate were added to a forced mixer and stirred, followed by further mixing 3 wt% of water, 3 wt% of polymer emulsion, and 0.36 wt% of pigment, followed by stirring for 2 minutes. Color polymer cement concrete composition was prepared. The pigment used red iron oxide.

In this case, the cement-based binder is usually used by mixing 86.70% by weight of Portland cement, 2.04% by weight of gypsum, blast furnace slag 5.10% by weight, metakaolin 5.10% by weight, lithium sulfate 0.42% by weight, water reducing agent 0.42% by weight and methyl cellulose 0.22% by weight. It was. The water reducing agent used a polycarboxylic acid-based water reducing agent.

The polymer emulsion is 90% by weight of styrene-butadiene emulsion, 3% by weight of styrene / acrylic emulsion, 2% by weight of polyethylene glycol monomethacrylate, 2% by weight of metal acrylic acid ester, 1% by weight of butyl acrylate, 1% by weight of acrylamide polymer %, Antifoam 0.5% by weight and air entrainer 0.5% by weight were used in combination. The antifoaming agent was a silicone antifoaming agent, and the air entrainer was a polycarboxylic acid air entrainer.

<Example 3>

17.64 wt% of cement-based binder, 45 wt% of fine aggregate and 31 wt% of coarse aggregate were added to a forced mixer and stirred, followed by further mixing 3 wt% of water, 3 wt% of polymer emulsion, and 0.36 wt% of pigment, followed by stirring for 2 minutes. Color polymer cement concrete composition was prepared. The pigment used red iron oxide.

In this case, the cement-based binder is usually used by mixing 86.70% by weight of Portland cement, 2.04% by weight of gypsum, blast furnace slag 5.10% by weight, metakaolin 5.10% by weight, lithium sulfate 0.42% by weight, water reducing agent 0.42% by weight and methyl cellulose 0.22% by weight. It was. The water reducing agent used a polycarboxylic acid-based water reducing agent.

The polymer emulsion is 85% by weight of styrene-butadiene emulsion, 8% by weight of styrene / acrylic emulsion, 2% by weight of polyethylene glycol monomethacrylate, 2% by weight of metal acrylic acid ester, 1% by weight of butyl acrylate, 1% by weight of acrylamide polymer %, Antifoam 0.5% by weight and air entrainer 0.5% by weight were used in combination. The antifoaming agent was a silicone antifoaming agent, and the air entrainer was a polycarboxylic acid air entrainer.

In order to more easily understand the characteristics of the above embodiments are presented comparative examples that can be compared with the embodiments of the present invention. Comparative Example 1 and Comparative Example 2 to be described later are merely presented for comparison with the characteristics of the embodiments, it is clear that the prior art of the present invention.

&Lt; Comparative Example 1 &

Usually 17.64% by weight of Portland cement, 45% by weight of aggregate and 31% by weight of coarse aggregate are added to a forced mixer and stirred, and then 6% by weight of water and 0.36% by weight of pigment are further mixed and stirred for 2 minutes to further color cement concrete composition. Was prepared. The pigment used red iron oxide.

Comparative Example 2

Usually, 17.64 wt% of Portland cement, 45 wt% of fine aggregate, and 31 wt% of coarse aggregate were added to a forced mixer and stirred, followed by further mixing 3 wt% of water, 3 wt% of styrene-butadiene emulsion, and 0.36 wt% of pigment. Stirring for minutes gave a colored polymer cement concrete composition. The pigment used red iron oxide.

Test results of the characteristics of the embodiments and the comparative examples according to the present invention as described above are the same as in Test Examples 1 to 8.

&Lt; Test Example 1 >

Color polymer cement concrete compositions prepared according to Examples 1 to 3 and cement concrete compositions prepared according to Comparative Examples 1 and 2 were subjected to a slump test (degree of kneading) according to the method specified in KS F 2402. The results are shown. The slump test is to test the toughness of the concrete dough, which means that the higher the value, the better the workability when pouring the cement concrete composition.

Table 1 below shows the change of slump over time.

division Slump change over time (cm) Immediately after bibim After 20 minutes After 30 minutes After 40 minutes After 50 minutes Example 1 19 15 13 11 9 Example 2 19 16 15 14 12 Example 3 20 18 17 16 14 Comparative Example 1 14 11 8 5 3 Comparative Example 2 18 12 8 4 2

As shown in Table 1 above, the color polymer cement concrete composition prepared according to Examples 1 to 3 has excellent workability compared to the cement concrete composition prepared according to Comparative Example 1 and Comparative Example 2, in particular, The color polymer cement concrete composition prepared according to Example 3 does not have a large change in slump even with time, and thus has excellent workability.

&Lt; Test Example 2 &

The results of the compressive strength test of the color polymer cement concrete compositions according to Examples 1 to 3 and the cement concrete compositions prepared according to Comparative Examples 1 and 2 according to the method specified in KS F 2405 are shown.

Table 2 below shows the change in compressive strength over time.

division Compressive strength (kgf / ㎠) 1 day later 3 days later After 7 days After 14 days After 28 days Example 1 118 220 315 385 459 Example 2 130 238 331 409 478 Example 3 147 256 358 438 498 Comparative Example 1 88 185 290 358 415 Comparative Example 2 85 182 288 357 418

As shown in Table 2, the color polymer cement concrete compositions prepared according to Examples 1 to 3 have superior durability because the compressive strength is significantly higher than that of the cement concrete compositions prepared according to Comparative Examples 1 and 2. Do.

<Test Example 3>

It shows the result of measuring the bending strength of the color polymer cement concrete composition prepared according to Examples 1 to 3 and the cement concrete composition prepared according to Comparative Examples 1 and 2 according to the method specified in KS F 2408.

Table 3 below shows the changes in flexural strength over time.

division Flexural strength (kgf / ㎠) 1 day later 3 days later After 7 days After 14 days After 28 days Example 1 35 48 59 68 74 Example 2 39 52 64 75 85 Example 3 42 56 68 82 92 Comparative Example 1 28 35 38 46 52 Comparative Example 2 38 43 53 63 70

As shown in Table 3 above, the color polymer cement concrete compositions prepared according to Examples 1 to 3 had significantly higher flexural strengths than the cement concrete compositions prepared according to Comparative Examples 1 and 2.

<Test Example 4>

The color polymer cement concrete composition prepared according to Examples 1 to 3 and the cement concrete composition prepared according to Comparative Example 1 and Comparative Example 2 were adhered according to the method specified in JIS A 1171 (Test Method of Polymer Cement Mortar). The result of measuring the intensity is shown.

Table 4 below shows the change in adhesion strength over time.

division Adhesion Strength (kgf / ㎠) 3 days later After 7 days After 14 days After 28 days Example 1 11 14 19 21 Example 2 12 15 20 23 Example 3 13 16 20 24 Comparative Example 1 6 8 13 17 Comparative Example 2 8 11 16 19

As shown in Table 4, the adhesion strength of the color polymer cement concrete compositions prepared according to Examples 1 to 3 was significantly higher than that of the cement concrete compositions prepared according to Comparative Examples 1 and 2.

&Lt; Test Example 5 >

The measurement result of water absorption is shown for the color polymer cement concrete composition prepared according to Examples 1 to 3 and the cement concrete composition prepared according to Comparative Example 1 and Comparative Example 2 according to the method defined in JIS A 1171.

division Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Absorption rate (%) 1.1 1.0 0.8 5 1.3

As shown in Table 5 above, the color polymer cement concrete compositions prepared according to Examples 1 to 3 had lower absorption rates than the cement concrete compositions prepared according to Comparative Examples 1 and 2.

<Test Example 6>

The color polymer cement concrete composition prepared according to Examples 1 to 3 and the cement concrete composition prepared according to Comparative Example 1 and Comparative Example 2 show the measurement results of the freeze thaw resistance test according to the method specified in KS F 2456. will be.

Table 6 shows the durability index of each of the Examples and Comparative Examples according to the freeze thaw resistance test.

division Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Durability index 91 92 93 54 88

As shown in Table 6 above, the color polymer cement concrete compositions prepared according to Examples 1 to 3 have much higher durability indexes than the cement concrete compositions prepared according to Comparative Examples 1 and 2. It can be seen that the improvement.

<Test Example 7>

Color polymer cement concrete compositions prepared according to Examples 1 and 3 and cement concrete compositions prepared according to Comparative Examples 1 and 2 were tested according to JIS A 1171, the results are shown in Table 7 below. It was.

division Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Chloride ion penetration depth (mm) 1.5 1.3 1.0 2.9 1.9

As shown in Table 7, the color polymer cement concrete compositions prepared according to Examples 1 to 3 have less chloride ion penetration depth compared to the cement concrete compositions prepared according to Comparative Examples 1 and 2. It was confirmed that the resistance to high.

<Test Example 8>

The dry shrinkage rate of the color polymer cement concrete compositions prepared according to Examples 1 to 3 and the cement concrete compositions prepared according to Comparative Examples 1 and 2 were measured by KS F 2424 (test method for changing the length of concrete). The results are shown in Table 8 below.

division Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Dry shrinkage
(× 10 ^-4 ) 0.7 0.5 0.4 2.1 1.2

As shown in Table 8, the color polymer cement concrete composition prepared according to Examples 1 to 3 is reduced in the amount of dry shrinkage compared to the cement concrete composition prepared according to Comparative Example 1 and Comparative Example 2 to reduce the shrinkage effect It could be confirmed.

As mentioned above, although preferred embodiment of this invention was described in detail, this invention is not limited to the said embodiment, A various deformation | transformation by a person of ordinary skill in the art within the scope of the technical idea of this invention is carried out. This is possible.

Claims (8)

5-30% by weight of cement-based binders usually comprising portland cement, 30-60% by weight of fine aggregate, 25-55% by weight of coarse aggregate, 0.1-7% by weight of water, 0.1-15% by weight of polymer emulsion and 0.01-5% by weight of pigment Including;
The polymer emulsion may be 80 to 99.9 wt% of a styrene-butadiene emulsion, 0.01 to 10 wt% of a styrene / acrylic emulsion, 0.01 to 10 wt% of polyethylene glycol monomethacrylate, 0.01 to 10 wt% of a metal acrylate ester, and 0.01 butyl acrylate. Color polymer cement concrete composition comprising-10% by weight.
The color polymer cement concrete composition of claim 1, wherein the polymer emulsion further comprises 0.01 to 10% by weight of acrylamide polymer.
The method of claim 1, wherein the cement-based binder,
Color polymer cement concrete, comprising 70 to 99% by weight of Portland cement, 0.1 to 15% by weight of gypsum, 0.1 to 15% by weight of blast furnace slag, 0.01 to 15% by weight of metakaolin and 0.001 to 5% by weight of lithium sulfate Composition.
The color polymer cement according to claim 3, wherein the cement-based binder further comprises 0.001 to 5% by weight of at least one material selected from polyvinyl alcohol, polyacrylamide, methyl cellulose, starch and gum. Concrete composition.
The color polymer cement of claim 1, wherein the pigment is at least one inorganic pigment selected from titanium oxide, red iron oxide, yellow iron oxide, chromium oxide (Cr ₂ O ₃ ), purple iron oxide, black iron oxide, and carbon black. Concrete composition.
A chipping step of removing surface layers, irregularities, latencies, and impurities of the concrete slab by using a shot blaster, a planarizer, or a hand water jet;
Applying a primer or blooming on top of the chipped surface;
Depositing said color polymer cement concrete composition according to claim 1 on a primer applied or blooming portion;
Stabilizing the surface by using a tinning machine to prevent slipping in the state where the color polymer cement concrete composition is not cured, and preventing cracks due to dry shrinkage; And
Spraying a curing agent on top of said colored polymer cement composition,
The primer is a concrete pavement method, characterized in that at least one material selected from styrene butadiene rubber latex, poly acrylic ester, acrylic and ethylene vinyl acetate.
Removing the impurities or the deterioration site by chipping the site where the concrete structure is deteriorated or the impurities are adhered using a crusher and a water jet;
Applying a primer to a site from which impurities or deterioration sites are removed;
Restoring a cross section of the site from which impurities or deterioration sites are removed by pouring the color polymer cement concrete composition according to claim 1; And
Applying a surface protector on top of the poured color polymer cement concrete composition,
The primer is a maintenance method of a concrete structure, characterized in that at least one material selected from styrene butadiene rubber latex, poly acrylic ester, acrylic and ethylene vinyl acetate.
The method of claim 7, wherein the surface protector,
Styrene-butadiene emulsion 80 to 99.9 wt%, styrene / acrylic emulsion 0.1 to 10 wt%, polyethylene glycol monomethacrylate 0.01 to 10 wt%, metal acrylate ester 0.01 to 10 wt% and butyl acrylate 0.01 to 10 wt% Or a material comprising at least one material selected from styrene butadiene rubber latex, polyacrylic ester, acrylic and ethylene vinyl acetate.