KR101749306B1 - The environment-friendly corrosion prevention compositions for concrete structures and constructing method using the same - Google Patents

Abstract

The present invention relates to an eco-friendly anticorrosive composition for a concrete structure and a construction method using the same.
The eco-friendly anticorrosive composition of a concrete structure according to the present invention is formed of a first composition comprising a first liquid and a second liquid which reacts with and cures with the first liquid, Penetrating into the inside from the surface to be hardened to form a primer permeation layer 20 for strengthening the surface of the concrete structure 10.
According to the above-described construction, the present invention can penetrate from the surface to the inside of the structure with concrete to strengthen the surface of the concrete structure and form a physically and chemically stable coating film to improve properties such as corrosion resistance, chemical resistance, and high weatherability , It is possible to prevent the emission of volatile organic compounds (VOCs) into the atmosphere at the time of manufacturing, thereby reducing environmental pollution. It is possible to prevent the risk of fire and explosion accident caused by the use of conventional oil paint, .

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an eco-friendly anticorrosive composition for a concrete structure, and a construction method using the eco-friendly anticorrosion composition.

The present invention relates to an eco-friendly anticorrosive composition for a concrete structure, and more particularly to an eco-friendly anticorrosive composition for a concrete structure which penetrates from the surface to the interior of the structure by concrete to reinforce the surface of the concrete structure and form a film that is environmentally friendly and physically and chemically stable To improve the properties such as corrosion resistance, chemical resistance and high weather resistance, and to a method of using the same.

Generally, concrete has good compressive strength, and is resistant to acid resistance, alkali resistance, chemical resistance, ultraviolet rays, etc. However, as the use period elapses, the strength of the concrete decreases due to impurities such as acid / alkali and organic matters, When cracks occur due to external cracks, micro cracks occur at irregular cracks and joints, cracks occur due to external forces, and when corrosion is intensified, the buried reinforcing bars are corroded to severely degrade the durability of the structure. There is a problem to damage.

In recent years, as the quality of life has been improved, interest in the environment has increased, and the concept of cleanliness of indoor air has been highlighted. At the same time, "Sick House Syndrome" In order to solve the problem of becoming a social problem, there is a demand for a product which is environmentally friendly and harmless to human body.

In general, most building materials used in indoor use contain toxic chemicals. In particular, the use of building materials containing chemicals is increasing in terms of mass production and cost, and the indoor air quality is getting worse .

Further, in the case of a concrete structure exposed to the outside, it is often rusted and rusted with the passage of time, thereby forming a coating layer on the concrete structure with a coating agent. However, the coating layer is in a state of being cleaned, If the coating is poor, adhesion with the surface is poor after the application, and the lifting and peeling phenomenon occurs. The organic material forming the coating film is likely to be transformed by ultraviolet rays, deterioration due to moisture absorption occurs, and durability is low and heat resistance is low.

Conventionally, waterproof / anticorrosion coating method is applied to form a flexible and smooth coating film having excellent anticorrosion and chemical resistance, and embossing is formed on the surface of the coating film by controlling the spray angle, thereby exhibiting slip prevention and aesthetic function, The coating method was applied to coat concrete directly with polyurea resin widely used for waterproof / corrosion.

Such a coating construction method is applied and adhered to a target surface of a structure made of concrete so that the adhesion surface can be protected from external environment such as pollutants and physical / chemical impacts.

However, such a coating method has a problem that the coating liquid composition is coated on the surface of the concrete structure, but the coating film is easily removed or faded to shorten the life span.

In addition, since the volatile components contained in the coating material after coating are dispersed for a long time to pollute the ambient air, the coating material made of synthetic resin or the like can not be environmentally friendly. Further, in a situation where environmental regulations for volatile substances are intensified, There is a demand for development of a highly functional and natural-friendly coating liquid composition and coating method to be solved.

Domestic Registration No. 10-0976831 (registered on August 12, 2010) Domestic registered patent No. 10-1458744 (registered on October 30, 2014)

The present invention relates to an eco-friendly corrosion prevention method of a concrete structure capable of enhancing the properties such as corrosion resistance, chemical resistance and high weather resistance by penetrating from the surface to the inside of the structure by reinforcing the surface of the concrete structure and forming a physically and chemically stable coating film And a method for constructing the same.

In addition, the present invention can prevent the emission of volatile organic compounds (VOCs) into the atmosphere at the time of construction, thereby reducing environmental pollution, preventing the risk of fire and explosion accident caused by the use of the conventional oil paint, The present invention provides an eco-friendly anticorrosive composition for a concrete structure and a construction method using the same.

The present invention also provides a method for preventing deterioration of a concrete structure and corrosion of an inner reinforcing bar in a long term by easily penetrating the corrosion inhibiting composition into a concrete structure to form a firm and water- And a method for constructing the same.

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

The eco-friendly anticorrosive composition of a concrete structure according to the present invention is formed of a first composition comprising a first liquid and a second liquid which reacts with and cures with the first liquid, Penetrating into the inside from the surface to be hardened to form a primer permeation layer 20 for strengthening the surface of the concrete structure 10.

A second composition positioned above the primer impregnated layer (20) and forming a mid layer (30) on the surface of the concrete structure (10); And a third composition forming a top layer (40) positioned above the intermediate layer (30), wherein the second composition comprises an acrylic resin, water, a dispersant, a defoamer, a surfactant and a thickener in a mixing tank The third composition is mixed with the fourth liquid and the fourth liquid to form the intermediate layer 30, and the third composition is mixed with the fourth liquid and the fourth liquid, Wherein the first liquid is prepared by charging an acrylic polyol resin containing a hydroxyl group, a defoaming agent, a surfactant and water into a mixing tank, and mixing the hydroxyl group-containing acrylic polyol resin, 10 to 70 parts by weight of an acrylic polyol resin, 0.2 to 1 part by weight of an antifoaming agent, 0.1 to 0.4 part by weight of a surfactant and 30 to 80 parts by weight of water, charging the mixture into a mixing tank to prepare a mixed solution,And the mixture is stirred uniformly at a speed of 200 to 300 rpm using a stirrer to produce a first liquid, wherein hexamethylene diisocyanate (HDI) is used as the second liquid, 10 to 50 parts by weight of the first liquid is used in an amount of 10 to 50 parts by weight based on 100 parts by weight of the total weight of the first liquid and 30 to 60 parts by weight of the acrylic resin, 5 to 10 parts by weight of water, 0.2 to 2 parts by weight of the dispersant, 0.1 to 0.4 parts by weight of a surfactant and 0.2 to 1 part by weight of a thickener, and the fourth solution is prepared by mixing an acrylic polyol resin containing a hydroxyl group, a dispersant, a defoaming agent, a surfactant, a thickener and water The mixture is uniformly mixed to prepare a mixture, a pigment is added to the mixture, and the mixture is stirred with a stirrer for a certain period of time. The mixture containing the hydroxyl group By weight of 50 to 70 parts by weight of an acrylic polyol resin, 0.2 to 0.5 parts by weight of a dispersant, 0.2 to 1 part by weight of a defoamer, 0.1 to 0.4 part by weight of a surfactant, 0.2 to 2 parts by weight of a thickener and 2 to 5 parts by weight of water The mixture is uniformly mixed to prepare a mixed liquid. 15 to 20 parts by weight of the pigment are added based on 100 parts by weight of the total mixed liquid, and the mixture is uniformly stirred at a speed of 500 to 1000 rpm using a stirrer. The fifth solution may be hexamethylene diisocyanate (HDI) as a curing agent, and the fifth solution may be used in an amount of 10 to 50 parts by weight based on 100 parts by weight of the fourth solution.

The acrylic polyol resin used in the first solution is prepared by mixing 50 to 70 parts by weight of water, 1 to 2 parts by weight of a polymerization initiator, 10 to 20 parts by weight of an acrylic monomer containing a hydroxyl group, 2 to 3 parts by weight of an acrylic monomer having a carboxyl group And 10 to 15 parts by weight of an amide-based acrylic monomer, to prepare a water-soluble acrylic polyol resin; and the acrylic resin used in the third solution is at least one selected from vinyl chloride, vinyl acetate, acrylic acid, methacrylic acid, butyl acetate, Hydroxyethyl methacrylate, 2-hydroxypropyl acrylate, 2-hydroxypropyl methacrylate, glycidyl acrylate, glycidyl acrylate, 2-hydroxyethyl acrylate, And glycidyl methacrylate, and at least one selected from the group consisting of And polymerization.

In addition, the method of applying the eco-friendly anticorrosive composition of the concrete structure according to the present invention includes forming a primer penetration layer 20 formed by penetrating the concrete structure 10 from the surface thereof (S100); Forming an intermediate layer 30 on the surface of the concrete structure 10 above the primer permeation layer 20 (S200); And forming a top layer (40) on top of the intermediate layer (30), wherein the primer permeation layer (20) is prepared using a first composition, wherein the first composition comprises a first liquid And a second solution which is mixed with the first solution and reacts and cures inside the concrete structure (10), wherein the intermediate layer (30) is produced using a second composition, The top layer (40) is prepared by mixing a resin, water, a dispersant, a defoamer, a surfactant and a thickener into a mixing tank, mixing the same uniformly to prepare a third solution, and mixing the third solution with a pigment and a filler. Wherein the third composition comprises a fourth solution and a fifth solution mixed with the fourth solution to react and cure over the intermediate layer (30).

Wherein the first liquid is prepared by charging an acrylic polyol resin containing a hydroxyl group, a defoaming agent, a surfactant and water into a mixing tank, and mixing the acrylic polyol resin containing 10 to 70 parts by weight of the acrylic polyol resin containing the hydroxyl group, 0.2 to 1 part by weight, 0.1 to 0.4 part by weight of a surfactant, and 30 to 80 parts by weight of water are added to a mixing tank to prepare a mixed solution. The mixed solution is uniformly mixed at a rate of 200 to 300 rpm Hexamethylene diisocyanate (HDI) is used as a curing agent, and the second liquid is used in an amount of 10 to 50 parts by weight based on 100 parts by weight of the first liquid, And the third liquid is a mixture of 30 to 60 parts by weight of an acrylic resin, 5 to 10 parts by weight of water, 0.2 to 2 parts by weight of a dispersant, 0.2 to 1 part by weight of a defoamer, 0.1 to 0.4 parts by weight of a thickener and 0.2 to 1 part by weight of a thickener, and the fourth liquid is prepared by mixing an acrylic polyol resin containing a hydroxyl group, a dispersant, a defoaming agent, a surfactant, a thickener and water in a mixing tank 50 to 70 parts by weight of the hydroxyl group-containing acrylic polyol resin, 0.2 to 0.5 parts by weight of a dispersing agent, and 0.5 to 5 parts by weight of a dispersing agent are added to the mixture to prepare a mixture. The pigment is added to the mixture and stirred with a stirrer for a certain period of time. 0.2 to 1 part by weight of an antifoaming agent, 0.1 to 0.4 part by weight of a surfactant, 0.2 to 2 parts by weight of a thickener and 2 to 5 parts by weight of water are added to a mixing tank and uniformly mixed to prepare a mixed solution , 15 to 20 parts by weight of pigment are added based on 100 parts by weight of the total content of the mixed solution, and then uniformly mixed at a speed of 500 to 1000 rpm using a stirrer Hexamethylene diisocyanate (HDI) is used as the curing agent, and the fifth solution is used in an amount of 10 to 50 parts by weight based on 100 parts by weight of the fourth solution, The acrylic polyol resin used for the first solution is prepared by mixing 50 to 70 parts by weight of water, 1 to 2 parts by weight of a polymerization initiator, 10 to 20 parts by weight of an acrylic monomer containing a hydroxyl group, 2 to 3 parts by weight of an acrylic monomer having a carboxyl group, Wherein the acrylic resin used in the third solution is at least one selected from the group consisting of vinyl chloride, vinyl acetate, acrylic acid, methacrylic acid, butyl acetate, methyl Methacrylate, 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate, 2-hydroxy An acrylate, 2-hydroxypropyl methacrylate, glycidyl acrylate, glycidyl acrylate and glycidyl methacrylate over either or both selected from the group consisting of may be formed by polymerization.

The details of other embodiments are included in the detailed description.

The eco-friendly anticorrosive composition of the concrete structure according to the present invention and the method of using the same according to the present invention penetrate from the surface to the inside of the concrete structure by reinforcing the surface of the concrete structure and forming a physical and chemically stable coating film, Weatherability and the like can be improved.

In addition, the eco-friendly anticorrosive composition of the concrete structure according to the present invention and the construction method using the same can prevent environmental pollution by preventing volatile organic compounds (VOCs) from being discharged to the atmosphere during construction, The risk of an explosion can be prevented beforehand and the safety of the operator can be maximized.

In addition, the eco-friendly anticorrosive composition of the concrete structure according to the present invention and the construction method using the anticorrosive composition of the present invention can easily penetrate the interior of the concrete structure from the surface of the concrete structure to form a firm and water- It is possible to prevent the corrosion of the reinforcing bar and to manufacture it environmentally friendly.

It will be appreciated that embodiments of the technical idea of the present invention can provide various effects not specifically mentioned.

1 is a cross-sectional view schematically showing a cross-section of a concrete concrete structure using an environmentally-friendly corrosion inhibiting composition of a concrete structure according to the present invention.
2 is a flowchart illustrating a method of coating a concrete structure using an environmentally friendly corrosion inhibiting composition of a concrete structure according to the present invention.

Advantages and features of the present invention, and methods of accomplishing the same, will be apparent from and elucidated with reference to the embodiments described hereinafter in detail. However, the present invention is not limited to the embodiments described herein but may be embodied in other forms. Rather, the embodiments disclosed herein are provided so that the disclosure can be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the meaning in the context of the relevant art and are to be construed as ideal or overly formal in meaning unless explicitly defined in the present application Do not.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an eco-friendly anticorrosive composition of a concrete structure according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a cross-sectional view schematically showing a cross section of a concrete concrete structure using an environmentally-friendly corrosion inhibiting composition of a concrete structure according to the present invention. FIG. 2 is a cross-sectional view schematically showing a concrete structure of a concrete structure according to the present invention. Fig. 6 is a flowchart for explaining a coating method for coating. Fig.

1 and 2, the eco-friendly anticorrosive composition of the concrete structure according to the present invention comprises a first composition for forming a primer permeation layer 20 formed by penetrating into the surface of a concrete structure 10, A second composition positioned over the layer 20 and forming the intermediate layer 30 on the surface of the concrete structure 10 and a third composition forming the top layer 40 located above the intermediate layer 30, .

The first composition is a composition that penetrates into the interior of the concrete structure 10 to form a primer impregnated layer 20 that is cured into a reticulated structure. The first composition is a microcrack of the concrete structure 10 Or porosity to harden the surface of the concrete structure 10 by curing into a coating film of a reticulated structure to remove various gases (for example, O ₂ , CO ₂ , and H ₂ O) NOx, SOx, etc.) from entering the interior of the concrete structure 10.

In the present invention, the first composition comprises a first liquid and a second liquid mixed with the first liquid and reacting and curing inside the concrete structure (10).

The first liquid is mixed with a second liquid used as a curing agent, and the first liquid may be prepared by charging an acrylic polyol resin, a defoaming agent, a surfactant, and water into a mixing tank and then mixing them uniformly.

The acrylic polyol resin is a water-soluble resin having a hydroxyl functional group (OH), and the acrylic polyol resin is mixed with isocyanate used as a curing agent to be described later to react with the concrete structure 10, So that the coating film of the network-like structure can be formed.

In the present invention, the acrylic polyol resin contains a hydroxyl group. For example, the acrylic polyol resin may contain 50-70 parts by weight of water, 1-2 parts by weight of a polymerization initiator, 10-20 parts by weight of an acrylic monomer containing a hydroxyl group 2 to 3 parts by weight of an acrylic monomer having a carboxyl group, and 10 to 15 parts by weight of an acrylic monomer, to obtain a water-soluble acrylic polyol resin.

In the present invention, the acrylic monomer containing a hydroxyl group is preferably selected from the group consisting of 2-hydroxyacrylate, 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate, hydroxypropyl acrylate and hydroxypropyl methacrylate And the acrylic monomer having a carboxyl group may be at least one selected from the group consisting of acrylic acid, methacrylic acid, and maleic acid. The amide-based acrylic monomer may be at least one selected from the group consisting of acrylamide, N-methyl Acrylamide and diacetone acrylamide may be used.

The polymerization initiator may be at least one selected from the group consisting of highly reactive benzoyl peroxide, t-butyl peroxide, and potassium per sulfate (KPS). Preferably, the polymerization initiator is a water- Persulfate can be used.

In the present invention, the first liquid may be prepared by charging an acrylic polyol resin, a defoaming agent, a surfactant, and water into a mixing tank and then uniformly mixing the acrylic polyol resin, the acrylic polyol resin containing 10 to 70 0.2 to 1 part by weight of an antifoaming agent, 0.1 to 0.4 part by weight of a surfactant and 30 to 80 parts by weight of water are added to a mixing tank to prepare a mixed solution. The mixed solution is stirred at 200 to 300 rpm , The first liquid can be produced.

As described above, the acrylic polyol resin used in the first solution is prepared by mixing 50 to 70 parts by weight of water, 1 to 2 parts by weight of a polymerization initiator, 10 to 20 parts by weight of an acrylic monomer containing a hydroxyl group, To 3 parts by weight and an amide-based acrylic monomer in a weight ratio of 10 to 15 parts by weight to prepare a water-soluble acrylic polyol resin.

The antifoaming agent used in the first liquid is added to prevent the formation of bubbles. Any one or more selected from a mineral oil type antifoaming agent, a silicone type antifoaming agent and a non-silicone type antifoaming agent may be used. For example, (Poly) oxyalkylene ether esters, (poly) oxyalkylene sorbitan fatty acid esters, (poly) oxyalkylene alkyl (aryl) ether sulfuric acid ester salts Oxyalkylene antifoaming agents such as (poly) oxyalkylene alkylphosphoric acid esters, (poly) oxyalkylene alkylamines and (poly) oxyalkylene amides; Alcohol-based antifoaming agents such as octyl alcohol, hexadecyl alcohol, acetylene alcohol, glycols and the like; Amide-based antifoaming agents such as acrylate polyamines and the like; Phosphoric acid ester antifoaming agents such as tributyl phosphate, sodium octyl phosphate and the like; Metal soap defoamers such as aluminum stearate, calcium oleate and the like; Silicone defoaming agents such as dimethyl silicone oil, silicone paste, silicone emulsion, organic modified polysiloxane (polyorganosiloxane such as dimethylpolysiloxane), fluorosilicone oil and the like can be used, but not always limited thereto.

In the present invention, the antifoaming agent improves the wettability of the first liquid to improve the adhesion to the concrete structure 10 and removes air bubbles during the production of the first liquid to improve the appearance and the denseness of the coating film to improve the durability Can be used.

In the present invention, the defoaming agent may be contained in an amount of 0.2 to 1 part by weight based on the total amount of the first liquid. When the defoaming agent is contained in an amount of less than 0.2 part by weight, If it exceeds the weight part, the antifoaming effect is no longer significantly improved and other physical properties of the first liquid can be lowered.

The surfactant is used to improve the reactivity by adsorbing to the interface of the compositions used for preparing the first liquid by lowering the tension of the surface. For example, an alkylphenol surfactant, a cationic surfactant, an anionic A surfactant, a nonionic surfactant, and a polyether siloxane-based surfactant may be used, but the present invention is not limited thereto.

The second liquid is a composition comprising a curing agent mixed with the first liquid and reacting and curing inside the concrete structure 10. In the present invention, as the curing agent used in the second solution, isocyanate is used .

In the present invention, the isocyanate is selected from the group consisting of hexamethylene diisocyanate (HDI), hexamethylene diisocyanate trimer (HDT), isophorone diisocyanate (IPDI) and cyclohexylmethanediisocyanate (H12MDI ) May be used. In the present invention, hexamethylene diisocyanate (HDI) may be used as the isocyanate.

The second liquid used as the hardening agent is mixed with the acrylic polyol resin and reacted. After penetrating into the concrete structure 10 from the surface thereof and then curing, a coating film having a network structure can be formed. In the present invention, The first liquid and the second liquid may be mixed to form the first liquid 20, and the second liquid may be used in an amount of 10 to 50 parts by weight based on 100 parts by weight of the first liquid .

If the acrylic polyol resin is contained in the composition forming the first liquid at a level lower than the lower limit described above, the surface strengthening effect of the concrete structure 10 is significantly deteriorated. When the acrylic polyol resin is contained in excess of the upper limit, The surface strengthening effect of the concrete structure 10 is lowered due to the decrease of the relative content and the flowability and workability due to the viscosity increase due to stirring may be deteriorated and the penetration effect into the concrete structure 10 may be deteriorated.

The second composition is a composition for forming an intermediate layer 30 located on a primer penetration layer 20 formed of a first composition and the intermediate layer 30 is a composition for forming a concrete structure 10 and a pigment and a filler are added to a third liquid containing an acrylic resin so that general pores or dents on the surface of the concrete structure 10 can be treated.

The third solution may be prepared by charging an acrylic resin, water, a dispersing agent, a defoaming agent, a surfactant, and a thickener into a mixing tank and then uniformly mixing the solution. The third solution may be prepared by mixing 30 to 60 parts by weight of an acrylic resin, 0.2 to 2 parts by weight of a dispersant, 0.2 to 1 part by weight of a defoamer, 0.1 to 0.4 part by weight of a surfactant and 0.2 to 1 part by weight of a thickener.

The acrylic resin may be prepared by polymerizing an acrylic monomer, and the acrylic monomer may impart main functions such as mechanical properties of the composition, bonding strength between the resins, adhesion and durability. Examples of the acrylic monomer include vinyl chloride, vinyl acetate, acrylic acid, methacrylic acid, butyl acetate, methyl methacrylate, 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate, Acrylate, 2-hydroxypropyl methacrylate, glycidyl acrylate, glycidyl acrylate, and glycidyl methacrylate may be polymerized by polymerizing at least one selected from the group consisting of hydroxypropyl acrylate, 2-hydroxypropyl methacrylate, glycidyl acrylate, glycidyl acrylate and glycidyl methacrylate.

When the content of the acrylic resin is less than 30 parts by weight, the flowability and workability due to the viscosity increase of the composition may be increased. If the content is more than 60 parts by weight, the mechanical properties of the coating film formed by the curing are remarkably lowered, resulting in deterioration of workability and film strength.

The dispersant may be included to control the viscosity of the composition contained in the third liquid so that the particles of the compositions contained in the composition are dispersed and uniformly applied to the surface of the concrete structure 10 on the primer permeation layer 20 .

If the amount of the dispersing agent is less than 0.2 parts by weight, the composition of the third liquid may be miscible due to a lack of the dispersing agent. It is not dispersed uniformly on the primer impregnation layer 20, and when it is contained in an amount exceeding 2 parts by weight, the dispersion effect does not increase proportionally in proportion to the increase of the dispersant content. In the present invention, the dispersant may be a mixture of one or more dispersants selected from the group consisting of a monophosphate ester dispersant, a polyphosphate dispersant, an acrylate copolymer dispersant and a modified silicone dispersant, but is not limited thereto.

The antifoaming agent is added to prevent the formation of bubbles. The antifoaming agent may be selected from a mineral oil type antifoaming agent, a silicone type antifoaming agent and a non-silicone type antifoaming agent. Examples thereof include polyoxyalkylenes, (poly) oxyalkyl ethers (Poly) oxyalkylene sorbitan fatty acid esters, (poly) oxyalkylene alkyl (aryl) ether sulfuric acid ester salts, (poly) oxyalkylene sorbitan fatty acid esters, Oxyalkylene antifoaming agents such as phosphoric acid esters, (poly) oxyalkylene alkylamines, (poly) oxyalkylene amides and the like; Alcohol-based antifoaming agents such as octyl alcohol, hexadecyl alcohol, acetylene alcohol, glycols and the like; Amide-based antifoaming agents such as acrylate polyamines and the like; Phosphoric acid ester antifoaming agents such as tributyl phosphate, sodium octyl phosphate and the like; Metal soap defoamers such as aluminum stearate, calcium oleate and the like; Silicone defoaming agents such as dimethyl silicone oil, silicone paste, silicone emulsion, organic modified polysiloxane (polyorganosiloxane such as dimethylpolysiloxane), fluorosilicone oil and the like can be used, but not always limited thereto.

In the present invention, the antifoaming agent improves the wettability of the second composition to improve adhesion to the primer permeation layer 20 and the concrete structure 10, and removes bubbles during the production of the second composition, Can be used to improve durability.

In the present invention, the defoaming agent may be contained in an amount of 0.2 to 1 part by weight based on the total amount of the third solution. When the defoaming agent is contained in an amount of less than 0.2 part by weight, the defoaming effect may be deteriorated during the production of the third solution. If it exceeds the weight part, the bubble effect is no longer significantly improved and other physical properties of the third liquid can be lowered.

The surfactant is used for improving the reactivity by adsorbing to the interface of the compositions used for preparing the third liquid by lowering the tension of the surface. For example, an alkylphenol surfactant, a cationic surfactant, an anionic A surfactant, a nonionic surfactant, and a polyether siloxane-based surfactant may be used, but the present invention is not limited thereto.

The thickener may be added to prevent the flow of the coating film during coating, to prevent sedimentation of the pigment or filler in the coating, and to maintain the stable dispersion state of the pigment by controlling the viscosity and fluidity of the third liquid. As the thickener, a known thickener may be used, for example, a water dispersible acrylic ester-acrylic acid copolymer may be used as the thickener.

The pigment functions to fill pores in the coated film and to control the complement and gloss of hardness, film formation, etc. The pigment may be used in an amount of 1.5 to 10 parts by weight based on 100 parts by weight of the third liquid.

As the pigment in the present invention, for example, at least one selected from calcium carbonate, clay, talc, magnesium silicate, kaolin, mica, silica, aluminum silicate, aluminum hydroxide, barium sulfate, barium sulfate and mixtures thereof Not only a good appearance of the coating film can be obtained, but also hardness, impact resistance, rustproofing property and the like can be improved.

The filler improves thermal and physical strength, prevents abrasion and affects phosphorus, imparts a function of improving corrosion resistance, weatherability, and gloss, and enhances the heat shielding function by preventing the paint film from being deteriorated or being deteriorated by long- The filler may be used in an amount of 30 to 50 parts by weight based on 100 parts by weight of the third solution.

Examples of the filler include Illite-Mica, Zeolite, Silica, Elvanite, Olivine, Kaolin, Silica Mineral, Diatomite, Wollastonite, Pyrophyllite, Dolomite, Lithium Minerals, Magnesite, Bauxite, Bentonite, Pumice, Borate, Borate, Carbonate Minerals, Attapulgite, Sepiolite, Nephrite, Apatite, Acid Clay, Iron Oxide, Garnet, Carbonate Minerals, Clay Minerals), feldspar, perlite, vermiculite, barite, talc, diatomaceous earth, graphite, hectorite, clay minerals, Zirconium Minerals, Titanium Minerals, Tourmaine, Air, Gel (Aerogel), from fly Ashton (Fly ash) and blast furnace slag powder can be used alone or in combination.

In the present invention, the second composition is prepared by adding an acrylic resin, water, a dispersing agent, an antifoaming agent, a surfactant and a thickening agent to a mixing tank to uniformly mix the mixture to prepare a third solution, mixing the third solution with a pigment and a filler Specifically, 30 to 60 parts by weight of an acrylic resin, 5 to 10 parts by weight of water, 0.2 to 2 parts by weight of a dispersant, 0.2 to 1 part by weight of a defoaming agent, 0.1 to 0.4 parts by weight of a surfactant and 0.2 to 1 part by weight of a thickener And the mixture is charged into a mixing tank to prepare a third solution. From the first solution, 1.5 to 10 parts by weight of the pigment and 30 to 50 parts by weight of the filler are added based on 100 parts by weight of the third solution to prepare a mixed solution The above mixed solution is uniformly stirred at a speed of 500 to 1000 rpm using a stirrer to prepare a second composition.

The third composition is a composition for forming an upper layer (40) positioned on the intermediate layer (30) formed of the second composition. In the present invention, the third composition is a mixture of the fourth solution and the fourth solution And a fifth solution which reacts and cures on the intermediate layer 30.

The fourth liquid is mixed with a fifth liquid used as a curing agent, and the fourth liquid is prepared by charging an acrylic polyol resin, a dispersant, a defoamer, a surfactant, a thickener and water into a mixing tank, , Adding a pigment to the mixture, and stirring the mixture with a stirrer for a certain period of time.

The acrylic polyol resin is a water-soluble resin having a hydroxyl functional group (OH). The acrylic polyol resin reacts with isocyanate used as a curing agent to be described later, And the coating is cured on the top to form a coating film of a network-like structure.

In the present invention, the acrylic polyol resin contains a hydroxyl group. For example, the acrylic polyol resin may contain 30 to 40 parts by weight of water, 1 to 2 parts by weight of a polymerization initiator, 10 to 20 parts by weight of an acrylic monomer containing a hydroxyl group 2 to 3 parts by weight of an acrylic monomer having a carboxyl group, and 10 to 15 parts by weight of an acrylic monomer, to obtain a water-soluble acrylic polyol resin.

In the present invention, the acrylic monomer containing a hydroxyl group is preferably selected from the group consisting of 2-hydroxyacrylate, 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate, hydroxypropyl acrylate and hydroxypropyl methacrylate And the acrylic monomer having a carboxyl group may be at least one selected from the group consisting of acrylic acid, methacrylic acid, and maleic acid. The amide-based acrylic monomer may be at least one selected from the group consisting of acrylamide, N-methyl Acrylamide and diacetone acrylamide may be used.

The polymerization initiator may be at least one selected from the group consisting of highly reactive benzoyl peroxide, t-butyl peroxide, and potassium per sulfate (KPS). Preferably, the polymerization initiator is a water- Persulfate can be used.

In the present invention, the fourth solution is prepared by adding an acrylic polyol resin, a dispersant, a defoamer, a surfactant, a thickener and water into a mixing tank and uniformly mixing them to prepare a mixture. After adding the pigment to the mixture, Specifically, 50 to 70 parts by weight of an acrylic polyol resin containing the hydroxyl group, 0.2 to 0.5 parts by weight of a dispersant, 0.2 to 1 part by weight of a defoaming agent, 0.1 to 0.4 part by weight of a surfactant, 0.2 To 2 parts by weight of water and 2 to 5 parts by weight of water, and the mixture is put into a mixing tank and uniformly mixed to prepare a mixed solution. 15 to 20 parts by weight of a pigment is added based on 100 parts by weight of the total mixed liquid And the mixture is homogeneously stirred at a speed of 500 to 1000 rpm using a stirrer to prepare a fourth solution.

As described above, the acrylic polyol resin used in the fourth solution is prepared by mixing 30 to 40 parts by weight of water, 1 to 2 parts by weight of a polymerization initiator, 10 to 20 parts by weight of an acrylic monomer containing a hydroxyl group, To 3 parts by weight and an amide-based acrylic monomer in a weight ratio of 10 to 15 parts by weight to prepare a water-soluble acrylic polyol resin.

The dispersant used in the fourth liquid may be included to adjust the viscosity of the composition contained in the fourth liquid so that the particles of the compositions contained in the composition are dispersed and uniformly applied on the surface of the intermediate layer 30 .

When the dispersant is contained in an amount of less than 0.2 part by weight, the composition of the fourth liquid may be poorly dispersed due to a shortage of the dispersant content. It is not dispersed and is not uniformly applied on the intermediate layer 30, and when it is contained in an amount exceeding 0.5 parts by weight, the dispersing effect does not increase in proportion to the increase of the dispersant content. In the present invention, the dispersant may be a mixture of one or more dispersants selected from the group consisting of a monophosphate ester dispersant, a polyphosphate dispersant, an acrylate copolymer dispersant and a modified silicone dispersant, but is not limited thereto.

The antifoaming agent is added to prevent the formation of bubbles. The antifoaming agent may be selected from a mineral oil type antifoaming agent, a silicone type antifoaming agent and a non-silicone type antifoaming agent. Examples thereof include polyoxyalkylenes, (poly) oxyalkyl ethers (Poly) oxyalkylene sorbitan fatty acid esters, (poly) oxyalkylene alkyl (aryl) ether sulfuric acid ester salts, (poly) oxyalkylene sorbitan fatty acid esters, Oxyalkylene antifoaming agents such as phosphoric acid esters, (poly) oxyalkylene alkylamines, (poly) oxyalkylene amides and the like; Alcohol-based antifoaming agents such as octyl alcohol, hexadecyl alcohol, acetylene alcohol, glycols and the like; Amide-based antifoaming agents such as acrylate polyamines and the like; Phosphoric acid ester antifoaming agents such as tributyl phosphate, sodium octyl phosphate and the like; Metal soap defoamers such as aluminum stearate, calcium oleate and the like; Silicone defoaming agents such as dimethyl silicone oil, silicone paste, silicone emulsion, organic modified polysiloxane (polyorganosiloxane such as dimethylpolysiloxane), fluorosilicone oil and the like can be used, but not always limited thereto.

In the present invention, the antifoaming agent improves the wettability of the fourth liquid to improve the adhesion to the intermediate layer 30 and removes the air bubbles during the production of the fourth liquid to improve the appearance and the denseness of the coating film to improve the durability Can be used.

In the present invention, the defoaming agent may include 0.2 to 1 part by weight of the total amount of the fourth liquid. When the defoaming agent is contained in an amount of less than 0.2 part by weight, the defoaming effect may be deteriorated during the production of the fourth liquid. If it exceeds the weight part, the effect of the antifoam is not remarkably improved any more and the other properties of the fourth liquid can be lowered.

The surfactant is used for improving the reactivity by adsorbing to the interface of the compositions used for preparing the fourth liquid by lowering the tension of the surface. For example, an alkylphenol surfactant, a cationic surfactant, an anionic A surfactant, a nonionic surfactant, and a polyether siloxane-based surfactant may be used, but the present invention is not limited thereto.

The thickener may be added to control the viscosity and flowability of the fourth liquid to prevent the flow of the coating film during coating, prevent the deposition of the pigment in the coating, and maintain the stable dispersion state of the pigment. As the thickener, a known thickener may be used, for example, a water dispersible acrylic ester-acrylic acid copolymer may be used as the thickener.

The pigment plays a role of adjusting the hardness, coating film formation, etc. and controlling the gloss. Examples of the pigment include calcium carbonate, clay, talc, magnesium silicate, kaolin, mica, silica, aluminum silicate, Side, barium sulfate, barium sulfate, and mixtures thereof, not only a good coating film appearance can be obtained, but also hardness, impact resistance, rust prevention and the like can be improved.

The fifth liquid is a composition comprising a curing agent which is mixed with the fourth liquid to react and cure on the intermediate layer 30. In the present invention, isocyanate may be used as the curing agent used in the fifth liquid. have.

In the present invention, the isocyanate is selected from the group consisting of hexamethylene diisocyanate (HDI), hexamethylene diisocyanate trimer (HDT), isophorone diisocyanate (IPDI) and cyclohexylmethanediisocyanate (H12MDI ) May be used. In the present invention, hexamethylene diisocyanate (HDI) may be used as the isocyanate.

The fifth liquid used as the curing agent is mixed with the acrylic polyol resin and reacted to form a top layer 40 having a network structure by curing on the middle layer 30. In the present invention, The fourth solution and the fifth solution may be mixed to form the third composition, and the fifth solution may be used in an amount of 10 to 50 parts by weight based on 100 parts by weight of the fourth solution.

If the acrylic polyol resin is contained in the composition forming the fourth liquid at a temperature lower than the above lower limit, the surface strengthening effect of the upper layer 40 is remarkably lowered. If the upper limit is exceeded, The surface strengthening effect of the top layer 40 may be deteriorated due to the decrease of the relative content and the flowability and workability may be deteriorated due to the viscosity increase during stirring.

Hereinafter, a method of constructing a concrete structure using the eco-friendly anticorrosive composition of a concrete structure according to the present invention will be described in detail with reference to the accompanying drawings.

First, the primer permeation layer 20 formed by penetrating into the interior of the concrete structure 10 can be formed. (Step S100 of forming a primer permeation layer)

The primer impregnated layer 20 may be prepared using a first composition comprising a first liquid and a second liquid which is mixed with the first liquid to react and cure inside the concrete structure 10, . The first liquid is mixed with a second liquid used as a curing agent, and the first liquid is prepared by charging an acrylic polyol resin, a defoamer, a surfactant, and water into a mixing tank and then uniformly mixing the same .

That is, in the present invention, the first liquid may be prepared by charging an acrylic polyol resin, a defoaming agent, a surfactant, and water into a mixing tank and uniformly mixing the acrylic polyol resin, the acrylic polyol resin 10 containing the hydroxyl group To 70 parts by weight of an antifoaming agent, 0.2 to 1 part by weight of a defoamer, 0.1 to 0.4 parts by weight of a surfactant and 30 to 80 parts by weight of water, and then the mixture is added to a mixing tank to prepare a mixed solution. To 300 rpm, so that the first liquid can be produced.

The second liquid is a composition comprising a curing agent mixed with the first liquid and reacting and curing inside the concrete structure 10. In the present invention, as the curing agent used in the second solution, isocyanate is used Hexamethylene diisocyanate (HDI) may be used. The second liquid may be used in an amount of 10 to 50 parts by weight based on 100 parts by weight of the first liquid.

Next, the intermediate layer 30 may be formed on the surface of the concrete structure 10 on the primer permeation layer 20 (intermediate layer formation step S200).

The intermediate layer 30 may be prepared using a second composition, which is prepared by charging an acrylic resin, water, a dispersant, a defoamer, a surfactant, and a thickener into a mixing tank, Specifically, 30 to 60 parts by weight of an acrylic resin, 5 to 10 parts by weight of water, 0.2 to 2 parts by weight of a dispersant, 0.2 to 1 part by weight of a defoaming agent 0.1 to 0.4 parts by weight of a surfactant, and 0.2 to 1 part by weight of a thickener, and the mixture is added to a mixing tank to prepare a third liquid. A pigment is added in an amount of 1.5 to 10 wt% based on 100 parts by weight of the third liquid And 30 to 50 parts by weight of a filler are added to prepare a mixed solution, and the mixed solution is uniformly stirred at a speed of 500 to 1000 rpm using a stirrer to prepare a second composition.

Wherein the acrylic resin is selected from the group consisting of vinyl chloride, vinyl acetate, acrylic acid, methacrylic acid, butyl acetate, methyl methacrylate, 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate, 2- Acrylate, 2-hydroxypropyl methacrylate, glycidyl acrylate, glycidyl acrylate, and glycidyl methacrylate.

The pigment functions to fill pores in the coated film and to control the complement and gloss of hardness, film formation, etc. The pigment may be used in an amount of 1.5 to 10 parts by weight based on 100 parts by weight of the third liquid.

As the pigment in the present invention, for example, at least one selected from calcium carbonate, clay, talc, magnesium silicate, kaolin, mica, silica, aluminum silicate, aluminum hydroxide, barium sulfate, barium sulfate and mixtures thereof Not only a good appearance of the coating film can be obtained, but also hardness, impact resistance, rustproofing property and the like can be improved.

The filler improves thermal and physical strength, prevents abrasion and affects phosphorus, imparts a function of improving corrosion resistance, weatherability, and gloss, and enhances the heat shielding function by preventing the paint film from being deteriorated or being deteriorated by long- The filler may be used in an amount of 30 to 50 parts by weight based on 100 parts by weight of the third solution.

Examples of the filler include Illite-Mica, Zeolite, Silica, Elvanite, Olivine, Kaolin, Silica Mineral, Diatomite, Wollastonite, Pyrophyllite, Dolomite, Lithium Minerals, Magnesite, Bauxite, Bentonite, Pumice, Borate, Borate, Carbonate Minerals, Attapulgite, Sepiolite, Nephrite, Apatite, Acid Clay, Iron Oxide, Garnet, Carbonate Minerals, Clay Minerals), feldspar, perlite, vermiculite, barite, talc, diatomaceous earth, graphite, hectorite, clay minerals, Zirconium Minerals, Titanium Minerals, Tourmaine, Air, Gel (Aerogel), from fly Ashton (Fly ash) and blast furnace slag powder can be used alone or in combination.

Then, a top coat layer 40 may be formed on the intermediate coat layer 30. (Upper layer forming step S300)

In the present invention, the top layer 40 may be prepared using a third composition, which is mixed with the fourth solution and the fourth solution to react and cure on the intermediate layer 30 And the fifth solution.

Here, the fourth solution is prepared by adding an acrylic polyol resin, a dispersing agent, a defoamer, a surfactant, a thickener and water into a mixing tank and then uniformly mixing the mixture to prepare a mixture. After the pigment is added to the mixture, Specifically, 50 to 70 parts by weight of an acrylic polyol resin containing a hydroxyl group, 0.2 to 0.5 parts by weight of a dispersant, 0.2 to 1 part by weight of a defoaming agent, 0.1 to 0.4 part by weight of a surfactant, 2 parts by weight of water and 2 to 5 parts by weight of water are added to a mixing tank and uniformly mixed to prepare a mixed solution. 15 to 20 parts by weight of pigment are added based on 100 parts by weight of the total mixed liquid, At a speed of 500 to 1000 rpm to prepare a fourth liquid.

The fifth liquid is a composition comprising a curing agent which is mixed with the fourth liquid to react and cure on the intermediate layer 30. In the present invention, isocyanate may be used as the curing agent used in the fifth liquid. have.

That is, the fifth solution used as the curing agent is mixed with the acrylic polyol resin and reacted to form an upper layer 40 having a network structure by curing on the intermediate layer 30. In the present invention, The fourth solution may be mixed with the fifth solution to form the third composition, and the fifth solution may be used in an amount of 10 to 50 parts by weight based on 100 parts by weight of the fourth solution.

Hereinafter, embodiments of the method of using the eco-friendly anticorrosive composition of a concrete structure according to the present invention will be described in more detail, but the technical idea of the present invention is not limited to the following embodiments.

<Examples>

First, the surface of the concrete structure was cleaned and prepared, and then a primer permeation layer was formed on the concrete structure.

The primer impregnated layer was prepared by coating a first composition on the surface of the concrete structure. To form the first composition, 30 parts by weight of an acrylic polyol resin, 0.5 parts by weight of an antifoaming agent, 0.2 parts by weight of a surfactant and 50 parts by weight of water The mixture was stirred uniformly at a rate of 250 rpm using a stirrer to prepare a first liquid. Then, the mixture was stirred at the rate of 100 parts by weight based on 100 parts by weight of the first liquid, And 20 parts by weight of hexamethylene diisocyanate (HDI) were mixed.

Next, a middle layer was formed on the surface of the concrete structure above the primer permeation layer.

The intermediate layer was prepared by coating a second composition on the surface of a concrete structure including the primer permeation layer. To form the second composition, 45 parts by weight of acrylic resin, 7 parts by weight of water, 1 part by weight of dispersant, 0.5 parts by weight of a surfactant, 0.2 parts by weight of a surfactant and 0.5 parts by weight of a thickener, and then charged into a mixing tank to prepare a third liquid. Based on 100 parts by weight of the third liquid, 5 parts by weight of the pigment and 40 parts by weight of the filler To prepare a mixed solution, and the mixed solution was uniformly stirred at a speed of 700 rpm using a stirrer to prepare a second composition.

Subsequently, a top layer was formed on the intermediate layer.

The third composition was prepared by coating 60 parts by weight of an acrylic polyol resin, 0.3 parts by weight of a dispersant, 0.5 parts by weight of a defoamer, 0.3 parts by weight of a surfactant, 1 part by weight of a thickener And 3 parts by weight of water. The mixture was then uniformly mixed to prepare a mixed solution. 18 parts by weight of the pigment was added based on 100 parts by weight of the total weight of the mixed solution, and the mixture was stirred at a speed of 800 rpm And uniformly stirred to prepare a fourth solution. 20 parts by weight of hexamethylene diisocyanate (HDI) was mixed with 100 parts by weight of the fourth solution.

&Lt; Comparative Example 1 &

In Comparative Example 1, only the middle layer and the upper layer were coated on the concrete structure without forming the primer penetration layer, unlike the Example 1, by using the same components as those of Example 1.

&Lt; Comparative Example 2 &

In Comparative Example 2, the primer penetration layer and the intermediate layer were not formed, but only the upper layer was coated on the concrete structure in the same manner as in Example 1, except that a coating film was formed on the concrete structure using the same components as those of Example 1.

The following test examples are experimental results in which characteristics of the embodiments of the present invention are compared with those of Comparative Examples 1 and 2 in order to more easily grasp the characteristics of the embodiments according to the present invention.

&Lt; Test Example 1 >

The results of physical property testing and insulation performance according to KS F 4936 (Concrete protection coating material) after forming a coating film layer on the surface of a concrete structure produced by the method of Examples and Comparative Examples 1 and 2 are shown in Table 1 Respectively.

Category (standard) Example Comparative Example 1 Comparative Example 2 Appearance after film formation After standard curing clear clear clear After accelerated weathering test After cold, repeated test After alkali resistance test After the salt-saline test Neutralization depth (mm) (1.0 or less) Good usually Bad Chloride ion penetration resistance (Coulombs) (1000 or less) Good usually Bad My permeability (not to be pitched) Good usually usually Water permeability (g / m ³ day) (50.0 or less)
Good Good usually Bond strength After standard curing Good Good usually After accelerated weathering test After cold, repeated test After alkali resistance test After the salt-saline test Crack Resistance -20 ° C clear clear usually 20 ℃ After accelerated weathering test Insulation performance Good usually usually

Referring to Table 1 above, the specimens of the concrete structures manufactured according to the examples were found to have no abnormality or good evaluation results over the entire evaluation items.

On the contrary, the test specimens of the concrete structures manufactured according to Comparative Example 1 and Comparative Example 2 were rated as normal or poor, which means that the concrete specimens prepared according to the examples penetrate from the surface of the structure to the inside thereof Thereby forming a cured primer impregnation layer. The primer permeation layer penetrates into microcracks or pores of the concrete structure and hardens as a coating film of a reticular structure, thereby reinforcing the surface of the concrete structure and improving the mechanical and chemical properties of the concrete structure .

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be possible. It is therefore to be understood that one embodiment described above is illustrative in all aspects and not restrictive.

10; Concrete constructions
20; Primer penetration layer
30; Middle floor
40; Top layer

Claims (5)

The first composition is formed from a first composition comprising a first liquid and a second liquid which reacts with and cures with the first liquid, the first composition penetrating into the interior of the concrete structure (10) 10 to form a primer impregnated layer 20,
A second composition positioned above the primer impregnated layer (20) and forming a mid layer (30) on the surface of the concrete structure (10); And
Further comprising a third composition forming a top layer (40) located on top of the intermediate layer (30)
The second composition is prepared by mixing an acrylic resin, water, a dispersant, a defoamer, a surfactant, and a thickener into a mixing tank to uniformly mix the mixture to prepare a third solution, and mixing the third solution with a pigment and a filler.
The third composition comprises a fourth solution and a fifth solution mixed with the fourth solution to react and cure above the intermediate layer 30,
Wherein the first liquid is prepared by charging an acrylic polyol resin containing a hydroxyl group, a defoaming agent, a surfactant and water into a mixing tank, and mixing the acrylic polyol resin containing 10 to 70 parts by weight of the acrylic polyol resin containing the hydroxyl group, 0.2 to 1 part by weight, 0.1 to 0.4 part by weight of a surfactant, and 30 to 80 parts by weight of water are added to a mixing tank to prepare a mixed solution. The mixed solution is uniformly mixed at a rate of 200 to 300 rpm To prepare a first liquid,
Hexamethylene diisocyanate (HDI) is used as the second liquid, and the second liquid is used in an amount of 10 to 50 parts by weight based on 100 parts by weight of the first liquid,
Wherein the third solution contains 30 to 60 parts by weight of an acrylic resin, 5 to 10 parts by weight of water, 0.2 to 2 parts by weight of a dispersant, 0.2 to 1 part by weight of a defoamer, 0.1 to 0.4 part by weight of a surfactant and 0.2 to 1 part by weight of a thickener , &Lt; / RTI &gt;
The fourth liquid is prepared by adding an acrylic polyol resin containing a hydroxyl group, a dispersing agent, a defoaming agent, a surfactant, a thickener and water into a mixing tank and uniformly mixing them to prepare a mixture. After the pigment is added to the mixture, 50 to 70 parts by weight of an acrylic polyol resin containing a hydroxyl group, 0.2 to 0.5 parts by weight of a dispersant, 0.2 to 1 part by weight of a defoaming agent, 0.1 to 0.4 part by weight of a surfactant, 0.2 to 2 parts by weight of a surfactant, And 15 to 20 parts by weight of a pigment are added to 100 parts by weight of the total weight of the mixed solution to prepare a mixed solution. At a speed of 500 to 1000 rpm,
Hexamethylene diisocyanate (HDI) is used as the curing agent, and the fifth solution is used in an amount of 10 to 50 parts by weight based on 100 parts by weight of the fourth solution,
The acrylic polyol resin used in the first solution is prepared by mixing 50 to 70 parts by weight of water, 1 to 2 parts by weight of a polymerization initiator, 10 to 20 parts by weight of an acrylic monomer containing a hydroxyl group, 2 to 3 parts by weight of an acrylic monomer having a carboxyl group And 10 to 15 parts by weight of an amide-based acrylic monomer, to prepare a water-soluble acrylic polyol resin,
The acrylic resin used in the third solution may be selected from the group consisting of vinyl chloride, vinyl acetate, acrylic acid, methacrylic acid, butyl acetate, methyl methacrylate, 2-hydroxyethyl acrylate, 2- And at least one selected from the group consisting of hydroxypropyl acrylate, 2-hydroxypropyl methacrylate, glycidyl acrylate, glycidyl acrylate and glycidyl methacrylate is polymerized Wherein the corrosion inhibitor is a compound of formula (I).
delete delete Forming a primer impregnated layer 20 formed by penetrating the surface of the concrete structure 10 into the inside (S100);
Forming an intermediate layer 30 on the surface of the concrete structure 10 above the primer permeation layer 20 (S200); And
And forming a top layer (40) on the intermediate layer (30) (S300)
The primer impregnated layer 20 is prepared using a first composition, the first composition comprising a first liquid and a second liquid which is mixed with the first liquid to react and cure inside the concrete structure 10, Including,
The intermediate layer 30 is prepared using a second composition, and the second composition is prepared by charging an acrylic resin, water, a dispersant, a defoamer, a surfactant, and a thickener into a mixing tank, And mixing the third liquid with a pigment and a filler,
The top layer 40 is prepared using a third composition, the third composition comprising a fourth solution and a fifth solution mixed with the fourth solution to react and cure over the intermediate layer 30 and,
Wherein the first liquid is prepared by charging an acrylic polyol resin containing a hydroxyl group, a defoaming agent, a surfactant and water into a mixing tank, and mixing the acrylic polyol resin containing 10 to 70 parts by weight of the acrylic polyol resin containing the hydroxyl group, 0.2 to 1 part by weight, 0.1 to 0.4 part by weight of a surfactant, and 30 to 80 parts by weight of water are added to a mixing tank to prepare a mixed solution. The mixed solution is uniformly mixed at a rate of 200 to 300 rpm To prepare a first liquid,
Hexamethylene diisocyanate (HDI) is used as the second liquid, and the second liquid is used in an amount of 10 to 50 parts by weight based on 100 parts by weight of the first liquid,
Wherein the third solution contains 30 to 60 parts by weight of an acrylic resin, 5 to 10 parts by weight of water, 0.2 to 2 parts by weight of a dispersant, 0.2 to 1 part by weight of a defoamer, 0.1 to 0.4 part by weight of a surfactant and 0.2 to 1 part by weight of a thickener , &Lt; / RTI &gt;
The fourth liquid is prepared by adding an acrylic polyol resin containing a hydroxyl group, a dispersing agent, a defoaming agent, a surfactant, a thickener and water into a mixing tank and uniformly mixing them to prepare a mixture. After the pigment is added to the mixture, 50 to 70 parts by weight of an acrylic polyol resin containing a hydroxyl group, 0.2 to 0.5 parts by weight of a dispersant, 0.2 to 1 part by weight of a defoaming agent, 0.1 to 0.4 part by weight of a surfactant, 0.2 to 2 parts by weight of a surfactant, And 15 to 20 parts by weight of a pigment are added to 100 parts by weight of the total weight of the mixed solution to prepare a mixed solution. At a speed of 500 to 1000 rpm,
Hexamethylene diisocyanate (HDI) is used as the curing agent, and the fifth solution is used in an amount of 10 to 50 parts by weight based on 100 parts by weight of the fourth solution,
The acrylic polyol resin used in the first solution is prepared by mixing 50 to 70 parts by weight of water, 1 to 2 parts by weight of a polymerization initiator, 10 to 20 parts by weight of an acrylic monomer containing a hydroxyl group, 2 to 3 parts by weight of an acrylic monomer having a carboxyl group And 10 to 15 parts by weight of an amide-based acrylic monomer, to prepare a water-soluble acrylic polyol resin. The acrylic resin used in the third solution is at least one selected from the group consisting of vinyl chloride, vinyl acetate, acrylic acid, methacrylic acid, Hydroxyethyl methacrylate, 2-hydroxypropyl acrylate, 2-hydroxypropyl methacrylate, glycidyl acrylate, glycidyl acrylate, 2-hydroxyethyl acrylate, And glycidyl methacrylate, and at least one selected from the group consisting of Wherein the corrosion inhibiting composition is applied to the surface of the concrete. delete

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