KR101714547B1 - Eco-friendly finishing composition for protecting surface of concrete structure and method for protecting surface of concrete structure therewith - Google Patents

Abstract

The present invention relates to an eco-friendly finishing composition for protecting the surface of concrete and a surface protection method for concrete structures using the same. The composition comprises: 5-95 wt% of an inorganic binder; 1-40 wt% of fine aggregate; 0.01-50 wt% of a durability improvement agent; and 0.1-20 wt% of water, wherein the durability improvement agent comprises: 35-99 wt% of a mesh-structure acrylic emulsion; 0.1-35 wt% of acrylonitrile styrene; 0.01-30 wt% of acrylate-2-chloroethyl; and 0.01-20 wt% of polysulfide. The present invention provides excellent hardness characteristics, durability and self-healing properties and thus, can reduce costs related to repair and maintenance. Moreover, the present invention provides excellent resistance to material separation and is convenient to use in construction, and thus can reduce construction time, construction costs, and repair time.

Description

TECHNICAL FIELD The present invention relates to an eco-friendly finishing material composition for protecting concrete surfaces, and a surface protecting method for concrete structures using the same. BACKGROUND ART [0002]

The present invention relates to an eco-friendly finishing composition for protecting a concrete surface and a method for protecting a surface of a concrete structure using the same. More specifically, the present invention can shorten a construction period, And a surface protecting method for a concrete structure using the same, and to a method for protecting a surface of a concrete structure using the same, and to a method for protecting a surface of a concrete structure using the same, which is capable of realizing an increase in a common period of a concrete structure, .

The deterioration of the performance of the concrete structure means that the concrete fails to exert its original function and deteriorates its characteristics over time due to neutralization, salt corrosion, frost, chemical erosion, alkali aggregate reaction, fatigue, weathering, Concrete should be repaired and reinforced regularly because the performance of the concrete gradually deteriorates after a certain period of time after casting or molding. The deterioration of the performance of the concrete is a crack, and when cracks occur, harmful outside air, moisture and chemical components permeate inside the concrete, thereby further deteriorating the performance of the concrete. In addition, due to the corrosion of the reinforcing bars inside the concrete structure due to moisture and chloride ions penetrating into the concrete, additional cracks occur or concrete falls off, and at the same time, the reinforcing steel section is reduced by the corrosion of the reinforcing bars, The structure is damaged.

In response to this, the construction cost related to remuneration is rapidly increasing in Korea. However, it is difficult to select the repair material because the repair structure does not perform properly during the use period or the clear quality standard for the repair material is not established at present. In this background, it is urgent to secure the reliability of the repair structure and the maintenance performance of the repaired structure by eliminating distrust of repair.

Korean Patent No. 10-1422206 (issued on July 24, 2014) Korean Registered Patent No. 0125566 (registered on October 07, 1997)

The problem to be solved by the present invention is to provide a concrete structure which is easy to construct and can shorten the construction period, reduce the construction cost, shorten the repair period, and is excellent in chloride penetration resistance, neutralization resistance, To provide an eco-friendly finishing composition for protecting the surface of a concrete, which is excellent in freeze-thaw resistance, saltiness and neutralization resistance, which can realize maintenance cost reduction and improved workability, and a method for protecting concrete structure surface using the same.

The durability performance improving admixture comprises 5 to 95% by weight of an inorganic binder, 1 to 40% by weight of a fine aggregate, 0.01 to 50% by weight of a durability improving admixture and 0.1 to 20% by weight of water, By weight of an acrylonitrile styrene, 0.1 to 35% by weight of acrylonitrile styrene, 0.01 to 30% by weight of 2-chloroethyl acrylate and 0.01 to 20% by weight of polysulfide. .

The endurance performance improving admixture may further include 0.01 to 10% by weight of a mixture of a polycarboxylic acid fluidizing agent and a melamine-based fluidizing agent in a weight ratio of 1: 0.1 to 0.9 to improve fluidity.

In addition, the endurance performance improving admixture may further contain 0.01 to 10% by weight of sodium polyacrylate to prevent material separation.

The durability improving admixture may further contain dimethylsilicone in an amount of 0.001 to 10 wt% in order to prevent defects on the surface such as brush marks, roller marks, orange peal, cratering, pinhole, 10% by weight.

The endurance performance improving admixture may further contain 0.001 to 10% by weight of isoprene acrylonitrile rubber to improve abrasion resistance, cold resistance and durability.

In addition, the durability improving admixture may further include 0.01 to 10 wt% of an antifoaming agent to reduce an increase in the amount of air due to generation of entrained air and entrapped air.

The inorganic binder is Portland cement 20 to 95% by weight of steel, calcium aluminate cement 0.1 to 30% by weight, the powder also has 3,000 ~ 9,000 cm ² / g of blast furnace slag fine powder 0.1 to 30% by weight of gel-light powder of 0.1 to 20 wt. 0.1 to 20% by weight of iron carbonate powder, 0.1 to 20% by weight of desulfurization gypsum, 0.1 to 20% by weight of ilite and 0.01 to 10% by weight of aluminum hydroxide.

The inorganic binder may further include 0.01 to 10% by weight of an alcohol alkylene oxide oxide for inhibiting shrinkage by cement.

The inorganic binder is used in an amount of 0.01 to 10% by weight, more preferably 0.01 to 10% by weight, of at least one material selected from the group consisting of polycarboxylic acid, naphthalene, melamine and lignin high performance water reducing agents for improving the watertightness and freeze- As shown in FIG.

The inorganic binder may further include 0.01 to 10% by weight of a retarder for delaying rapid curing.

The inorganic binder preferably further comprises 0.01 to 10% by weight of a pigment for realizing hue and improving the appearance.

The present invention also provides a method of manufacturing a concrete structure, comprising the steps of: removing impurities or deteriorated portions of a concrete structure by a grinder, a planer, a shot blaster or the like, removing the chipped portions with a hand water jet or a vacuum inhaler, Applying a primer for improving the adhesion of the environmentally friendly surface-protective composition for surface protection, inhibiting penetration of water and penetration of chlorine ions, and improving water resistance and waterproofing property, and applying the primer for surface- ; Applying a surface protective agent on top of the applied environmentally friendly finishing composition to improve resistance to salt, neutralization resistance, surface hardness, water resistance and water resistance; And curing the surface of the concrete structure.

Here, the surface protective agent is preferably one containing at least one of an acryl-urethane, a silicate-based inorganic surface protective agent, a silane-based penetration enhancer, and the durability improving admixture.

The eco-friendly finishing composition for protecting the surface of a concrete structure of the present invention is excellent in workability, resistance to chlorine ion penetration, durability, adhesion, water resistance, index performance and self-retention, .

Also, the eco-friendly finishing composition for surface protection of the present invention can be easily applied, shortening the construction period, reducing the construction cost and shortening the maintenance period.

According to the concrete structure repair method using the eco-friendly finishing composition for protecting the concrete surface of the present invention, the eco-friendly finishing composition for surface protection exhibits a high hardness and high strength and durability so that the construction period can be shortened and the period of use of the structure can be increased In addition, maintenance costs can be reduced, and excellent strength and durability can be achieved, resulting in increased maintenance and reduced maintenance costs.

Hereinafter, preferred embodiments according to the present invention will be described in detail. However, it should be understood that the following embodiments are provided so that those skilled in the art will be able to fully understand the present invention, and that various modifications may be made without departing from the scope of the present invention. It is not.

Hereinafter, the concrete structure refers to concrete structures such as general sewage structures, underground structures, exponential structures, roads, and expressways as well as facility structures (a central separation wall, a wing wall, a side wall concrete), a retaining wall structure, a concrete slab, It is used to mean all structures made of concrete.

The eco-friendly finishing composition for surface protection according to a preferred embodiment of the present invention includes inorganic binder, fine aggregate, durability improving admixture and water.

The inorganic binder is preferably contained in an amount of 5 to 95% by weight in the eco-friendly finish composition for surface protection.

The fine aggregate is preferably contained in the eco-friendly finishing composition for surface protection in an amount of 1 to 40% by weight. The fine aggregate is preferably silica sand mixed with silica sand (No. 5): No. 7 (silica sand) at a weight ratio of 0.01 to 0.3: 0.7: 0.99.

The endurance performance improving admixture serves to improve the warpage, tensile and adhesion strength, improve workability and durability, and has high fluidity (self-leveling) by forming a film in the cement hardened body, and the environmentally friendly finishing composition By weight to 0.01% by weight to 50% by weight.

Wherein the inorganic binder comprises 20 to 95% by weight of crude steel Portland cement, 0.1 to 30% by weight of calcium aluminate cement, 0.1 to 30% by weight of fine blast furnace slag powder having a powder degree of 3,000 to 9,000 cm ² / g, 0.1 to 20% by weight of iron oxide powder, 0.1 to 20% by weight of desulfurization gypsum, 0.1 to 20% by weight of ilite and 0.01 to 10% by weight of aluminum hydroxide.

The inorganic binder may further include 0.01 to 10% by weight of an alcohol alkylene oxide oxide for inhibiting shrinkage by cement.

The inorganic binder may be one or more substances selected from the group consisting of polycarboxylic acid, naphthalene, melamine and lignin-based high-performance water reducing agents to improve watertightness and freeze-thaw resistance and improve durability by making the internal structure of the cement- %. ≪ / RTI >

The inorganic binder may further include 0.01 to 10% by weight of a retarder for delaying rapid curing.

The inorganic binder preferably further comprises 0.01 to 10% by weight of a pigment for realizing hue and improving the appearance.

The crude steel portland cement is preferably the one specified in KS, and the crude steel portland cement distributed in the general market can be used. The crude steel portland cement is preferably contained in an amount of 20 to 95% by weight based on the inorganic binder.

The calcium aluminate cement can be obtained as a quick-setting material when it is mixed with cement to obtain the compressive strength of ordinary Portland cement obtained within a few days or several days within a few hours. The calcium aluminate cement is preferably contained in an amount of 0.1 to 30% by weight based on the inorganic binder. If the content of the calcium aluminate cement is less than 0.1% by weight, initial strength development and durability performance may be insufficient. If the content exceeds 30% by weight, workability and price competitiveness may be deteriorated.

The blast furnace slag powder and gelite powder having a powder degree of 3,000 ~ 9,000 cm ² / g are used as latent hydraulic and natural pozzolan materials to improve the long-term strength of the cement hardened material and to increase the chemical resistance and durability by making the hydrated structure of the cement hardened. . In addition, calcium silicate is produced with calcium hydroxide and is self-preserving to fill microcracks while growing. It is preferable that the blast furnace slag powder and gelite powder having a powderity of 3,000 to 9,000 cm ² / g are contained in an amount of 0.1 to 30% by weight and 0.1 to 20% by weight based on the inorganic binder. If the content of the blast furnace slag powder and the gelite powder is 3,000 ~ 9,000 cm ² / g, the long-term strength development, the durability improvement effect and the self-repair performance are lowered, and the content is more than 50% The initial intensity expression may be delayed.

The phyllosilicate powder is a natural pozzolanic material having a SiO2 content of 70% or more and an Al2O3 content of 8% or more, thereby enhancing long-term strength and durability as well as improving index performance and self-repairing performance. The cyanophyll powder is preferably contained in an amount of 0.1 to 20% by weight based on the inorganic binder. If the content of the cyanide powder is less than 0.1% by weight, the long-term strength development, durability, indexing performance and self-repairing performance are deteriorated. If the content is more than 20% by weight, workability may be deteriorated and initial strength development may be delayed.

The aluminum hydroxide is used to prevent material separation because of its excellent hygroscopicity. The aluminum hydroxide is preferably contained in an amount of 0.01 to 10% by weight based on the inorganic binder. When the content of the aluminum hydroxide is less than 0.01% by weight, separation of the material tends to occur. When the content of the aluminum hydroxide exceeds 10% by weight, workability and strength development may be deteriorated.

The desulfurized gypsum is used to reduce cracks due to drying shrinkage and to improve the strength development. The desulfurization gypsum is preferably contained in an amount of 0.1 to 20% by weight based on the inorganic binder. If the content of the desulfurized gypsum is less than 0.1% by weight, the effect of crack reduction and strength development may be insignificant. If the content is more than 20% by weight, workability may be improved but strength and water resistance may be deteriorated.

The iodine is used to improve the antimicrobial and antifouling properties of the composition. It is preferable that the iodine is contained in an amount of 0.1 to 20% by weight based on the inorganic binder. If the content of the iodide is less than 0.1% by weight, the effect of improving antimicrobial and antifouling properties may be insignificant. If the content is more than 20% by weight, antibacterial and antifouling properties are improved, but workability and economical efficiency are lowered.

The alcohol alkylene oxide serves to inhibit shrinkage by cement. The alcohol alkylene oxide is preferably contained in an amount of 0.01 to 10% by weight based on the inorganic binder. If the content of the alcohol alkylene oxide is less than 0.01% by weight, the effect of suppressing shrinkage due to cement may be weak. If the content is more than 10% by weight, the workability may be deteriorated.

The at least one material selected from the group consisting of polycarboxylic acid, naphthalene, melamine and lignin-based high-performance water reducing agents is dense in the internal structure of the cement hardened body to improve watertightness and freeze- It is preferable that at least one material selected from the above polycarboxylic acids, naphthalene, melamine and lignin-based high-performance water reducing agents is contained in an amount of 0.01 to 10% by weight based on the inorganic binder.

The retarder is used for delaying rapid curing in order to ensure workability for a predetermined period of time, and it is preferable that the retarder is contained in an amount of 0.01 to 10 wt% with respect to the inorganic binder. As the delaying agent, generally well known substances can be used. Examples thereof include saccharides such as glucose, glucose, texturin and dextran, acids or salts thereof such as gluconic acid, malic acid and citric acid, aminocarboxylic acids or salts thereof , Phosphonic acid or derivatives thereof, and polyhydric alcohols such as glycerin. The retarder is preferably a mixture of citric acid and gluconic acid in a ratio of 0.5 to 0.95: 0.05 to 0.5.

The above-mentioned pigments are used for improving hue and color, and are preferably contained in an amount of 0.01 to 10% by weight based on the inorganic binder. The pigment is added for easy identification, is easier to identify with a sharper color, and color persistence can be improved. The pigment may be at least one material selected from red iron oxide, yellow iron oxide, chromium oxide (CrO ₃ ), purple iron oxide and black iron oxide (carbon black), whereby red, green, yellow, , And white.

The durability improving admixture may be dispersed in a cement hardened material to form a film inside the cured hardened material to improve warpage, tensile and adhesion strength and improve water retention to improve durability such as neutralization, chloride ion penetration, freezing and thawing, (Self-leveling).

The endurance performance improving admixture may comprise from 35 to 99% by weight of network-structured acrylic emulsion, from 0.1 to 35% by weight of acrylonitrile styrene, from 0.01 to 30% by weight of 2-chloroethyl acrylate and from 0.01 to 20% by weight of polysulfide .

The network-structured acrylic emulsion not only enhances warpage, tensile and adhesion strength by forming a polymer film inside the environmentally-friendly eco-friendly surface composition for surface protection, but also improves durability due to a polymer film. The network-structured acrylic emulsion is a network structure vertically and horizontally connected and has characteristics of being superior in adhesion and weather resistance than a linear (horizontal) structure of existing acrylic emulsion. The reticulated acrylic emulsion is preferably contained in an amount of 40 to 99% by weight based on the endurance performance improving admixture. If the content of the network-structured acrylic emulsion is less than 40% by weight, the effect of improving the strength and durability is deteriorated. If the content is more than 99% by weight, the improvement effect is obvious but economical.

The acrylonitrile styrene is added to improve ductility, water resistance and oil resistance. The acrylonitrile styrene is preferably contained in an amount of 0.1 to 35% by weight based on the endurance performance improving admixture. If the content of the acrylonitrile styrene is less than 0.1 wt%, the ductility, water resistance and oil resistance deteriorate. If the content exceeds 35 wt%, the ductility is improved but the material separation phenomenon tends to occur.

The above-mentioned 2-chloroethyl acrylate is used for dispersibility and prevention of material separation. The above-mentioned 2-chloroethyl acrylate is preferably contained in an amount of 0.01 to 30% by weight based on the endurance performance improving admixture. When the content of the above-mentioned 2-chloroethyl acrylate is less than 0.01% by weight, the dispersibility deteriorates and the effect of preventing material separation becomes insufficient. When the content exceeds 30% by weight, the workability is improved but the strength is lowered.

The polysulfide is added to improve adhesion, weather resistance, ozone resistance and chemical resistance. The polysulfide is preferably contained in an amount of 0.01 to 20% by weight based on the endurance performance improving admixture. If the content of the polysulfide is less than 0.01% by weight, the effect of improving the adhesion, weatherability, and chemical resistance is insufficient. If the content of the polysulfide is more than 20% by weight, viscosity increases and workability is deteriorated.

The endurance performance improving admixture may further include 0.01 to 10 wt% of a fluidizing agent mixture in which a polycarbonate fluidizing agent and a melamine-based fluidizing agent are mixed in a weight ratio of 1: 0.1 to 0.9 to improve fluidity.

In addition, the endurance performance improving admixture may further contain 0.01 to 10% by weight of sodium polyacrylate to prevent material separation.

The durability improving admixture may further contain dimethylsilicone in an amount of 0.001 to 10 wt% in order to prevent defects on the surface such as brush marks, roller marks, orange peal, cratering, pinhole, 10% by weight.

The durability improving admixture may further include 0.01 to 10 wt% of an antifoaming agent to reduce an increase in the amount of air due to generation of entrained air.

The eco-friendly finishing composition for surface protection according to a preferred embodiment of the present invention is prepared by premixing 5 to 95% by weight of the inorganic binder and 1 to 95% by weight of the fine aggregate and then adding 0.01 to 50% And 20% by weight of the polyvinyl alcohol can be mixed for a predetermined time (for example, 1 to 5 minutes).

The method of protecting a concrete structure using an eco-friendly finishing composition for protecting a concrete surface according to the present invention includes the steps of removing impurities or deteriorated portions of a concrete structure by a grinder, a planer, a shot blaster, Applying a primer to improve the adhesion of the base concrete structure and the environmentally friendly finishing composition for surface protection, to inhibit water penetration and chlorine ion penetration, and to improve water resistance and waterproofness; Applying the protective eco-friendly finishing composition using a brush, roller, airless or the like; Applying a surface protective agent to the laid top to improve resistance to salt, neutralization resistance, surface hardness, water resistance, and water resistance; And curing.

The primer may be at least one selected from the group consisting of styrene-butadiene latex, polyacrylic ester, acrylic, ethyl vinyl acetate, methyl methacrylate, and the durability improving admixture.

Here, the surface protecting agent may be at least one selected from the group consisting of acrylic-urethane, silicate-based inorganic surface protective agent, silane-based penetration enhancer, and endurance improving admixture, but is not limited thereto.

Hereinafter, examples of the environmentally friendly finishing composition for surface protection according to the present invention will be more specifically shown and the present invention is not limited by the following embodiments.

≪ Example 1 >

45% by weight of inorganic binder and 5% by weight of fine aggregate were added to a forced mixer and stirred. Then, 45% by weight of improving admixture and 5% by weight of water were further mixed and stirred for 2 minutes to prepare an environmentally friendly finishing composition for surface protection.

At this time, the inorganic binder is composed of 40 wt% of crude steel portland cement, 15 wt% of calcium aluminate cement, 10 wt% of blast furnace slag powder having a powder degree of 3,000 to 9,000 cm ² / g, 10 wt% of gelite powder, A mixture of 0.5 wt% of aluminum hydroxide, 0.5 wt% of an alcohol alkylene oxide, 0.5 wt% of a retarder, 0.5 wt% of a polycarboxylic acid-based high-performance water reducing agent, and 0.5 wt% of a pigment were mixed Respectively. At this time, the retarder used was a mixture of citric acid and gluconic acid in a ratio of 0.9: 0.1.

The endurance performance improving admixture was composed of 92 wt% of network-structured acrylic emulsion, 2 wt% of acrylonitrile styrene, 2 wt% of acryloylic acid-2-chloroethyl, 2 wt% of polysulfide, 0.5 wt% of silicone defoamer, 0.5% by weight of sodium polyacrylate, 0.5% by weight of sodium polyacrylate and 0.5% by weight of dimethylsilicone.

At this time, the fluidizing agent was a fluidizing agent mixture in which a polycarboxylic acid-based fluidizing agent and a melamine-based fluidizing agent were mixed at a weight ratio of 1: 0.2.

≪ Example 2 >

45% by weight of inorganic binder and 5% by weight of fine aggregate were added to a forced mixer and stirred. Then, 45% by weight of improving admixture and 5% by weight of water were further mixed and stirred for 2 minutes to prepare an environmentally friendly finishing composition for surface protection.

At this time, the inorganic binder is composed of 40 wt% of crude steel portland cement, 15 wt% of calcium aluminate cement, 10 wt% of blast furnace slag powder having a powder degree of 3,000 to 9,000 cm ² / g, 10 wt% of gelite powder, A mixture of 0.5 wt% of aluminum hydroxide, 0.5 wt% of an alcohol alkylene oxide, 0.5 wt% of a retarder, 0.5 wt% of a polycarboxylic acid-based high-performance water reducing agent, and 0.5 wt% of a pigment were mixed Respectively. At this time, the retarder used was a mixture of citric acid and gluconic acid in a ratio of 0.9: 0.1.

The endurance performance improving admixture was composed of 86 wt% of network-structured acrylic emulsion, 4 wt% of acrylonitrile styrene, 4 wt% of acrylic acid 2-chloroethyl, 4 wt% of polysulfide, 0.5 wt% of silicone defoamer, 0.5% by weight of sodium polyacrylate, 0.5% by weight of sodium polyacrylate and 0.5% by weight of dimethylsilicone.

At this time, the fluidizing agent was a fluidizing agent mixture in which a polycarboxylic acid-based fluidizing agent and a melamine-based fluidizing agent were mixed at a weight ratio of 1: 0.2.

≪ Example 3 >

45% by weight of inorganic binder and 5% by weight of fine aggregate were added to a forced mixer and stirred. Then, 45% by weight of improving admixture and 5% by weight of water were further mixed and stirred for 2 minutes to prepare an environmentally friendly finishing composition for surface protection.

At this time, the inorganic binder is composed of 40 wt% of crude steel portland cement, 15 wt% of calcium aluminate cement, 10 wt% of blast furnace slag powder having a powder degree of 3,000 to 9,000 cm ² / g, 10 wt% of gelite powder, A mixture of 0.5 wt% of aluminum hydroxide, 0.5 wt% of an alcohol alkylene oxide, 0.5 wt% of a retarder, 0.5 wt% of a polycarboxylic acid-based high-performance water reducing agent, and 0.5 wt% of a pigment were mixed Respectively. At this time, the retarder used was a mixture of citric acid and gluconic acid in a ratio of 0.9: 0.1.

The endurance performance improving admixture was composed of 83 wt% of network-structured acrylic emulsion, 5 wt% of acrylonitrile styrene, 5 wt% of acrylic acid 2-chloroethyl, 5 wt% of polysulfide, 0.5 wt% of silicone defoamer, 0.5% by weight of sodium polyacrylate, 0.5% by weight of sodium polyacrylate and 0.5% by weight of dimethylsilicone.

At this time, the fluidizing agent was a fluidizing agent mixture in which a polycarboxylic acid-based fluidizing agent and a melamine-based fluidizing agent were mixed at a weight ratio of 1: 0.2.

In order to compare the physical properties of the environmentally friendly finishing composition for surface protection prepared according to the above-described Examples 1 to 3, presently widely used finishing compositions are shown as Comparative Example 1 and Comparative Example 2.

≪ Comparative Example 1 &

45% by weight of Portland cement and 5% by weight of fine aggregate were added to a forced mixer and stirred. 45% by weight of network-structured acrylic emulsion and 5% by weight of water were further mixed and then stirred for 2 minutes to prepare a polymer finishing composition.

≪ Test Example 1 > Preparation of test specimens

Was prepared by KS F 4936 (coating material for concrete protection) according to the formulations shown in the above Examples 1 to 3 and Comparative Example 1, and a 100 × 100 mm (appearance after forming a film) and a 100 × 100 × 100 mm mortar plate 150 × 40 mm mortar plate (water permeable), 70 × 70 × 20 mm mortar plate (adhesion strength) and 230 × 90 × 6 mm (depth of neutralization), 100 × 50 mm mortar plate (chloride ion penetration resistance) The specimens were fabricated using a flex plate (neutralization depth) and cured at a temperature of (20 ± 2) ° C and a humidity of (65 ± 10)%.

<Test Example 2> Appearance after Coating Film Formation

The appearance of the composition prepared according to Examples 1 to 3 and the composition prepared according to Comparative Example 1 after formation of the coating film is shown in Table 1 below.

division Example 1 Example 2 Example 3 Comparative Example 1 After standard curing clear clear clear clear After accelerated weathering test After repeated cold and cold tests After alkali resistance test After the salt water resistance test

As shown in Table 1, the composition prepared according to Examples 1 to 3 and the composition prepared according to Comparative Example 1 exhibited no abnormal appearance after coating film formation.

&Lt; Test Example 3 >

Neutralization depth tests of the compositions prepared according to Examples 1 to 3 and the compositions prepared according to Comparative Example 1 were carried out, and the results are shown in Table 2 below.

division Example 1 Example 2 Example 3 Comparative Example 1 Neutralization Depth
(mm) 0.04 0.02 - 0.06

As shown in Table 2, the compositions prepared according to Examples 1 to 3 have excellent neutralization resistance as compared with the composition prepared according to Comparative Example 1.

&Lt; Test Example 4 > Chloride ion penetration resistance

The chloride ion penetration resistance test of the composition prepared according to Examples 1 to 3 and the composition prepared according to Comparative Example 1 was carried out, and the results are shown in Table 3 below.

division Example 1 Example 2 Example 3 Comparative Example 1 Chloride ion
Penetration resistance
(Coulombs) 240 200 180 300

As shown in Table 3, the compositions prepared according to Examples 1 to 3 exhibited excellent chloride ion penetration resistance as compared with the composition prepared according to Comparative Example 1. [

&Lt; Test Example 5 >

The moisture permeability of the composition prepared according to Examples 1 to 3 and the composition prepared according to Comparative Example 1 were measured, and the results are shown in Table 4 below.

division Example 1 Example 2 Example 3 Comparative Example 1 Moisture permeability
(g / m ^{2 占} 폚) 19 17 15 21

As shown in Table 4, the compositions prepared according to Examples 1 to 3 of the present invention showed lower moisture permeability than the compositions prepared according to Comparative Example 1. [

&Lt; Test Example 6 >

Bond strength test of the composition prepared according to Examples 1 to 3 and the composition prepared according to Comparative Example 1 was carried out, and the results are shown in Table 5.

division Example 1 Example 2 Example 3 Comparative Example 1 Bond strength
(N / mm ² ) After standard curing 1.45 1.55 1.65 1.26 After accelerated weathering test 1.36 1.45 1.55 1.15 After cold repeated test 1.35 1.43 1.50 1.12 After alkali resistance test 1.36 1.45 1.52 1.14 After the salt water resistance test 1.36 1.43 1.50 1.12

As shown in Table 5 above, it can be seen that Examples 1 to 3 exhibit a higher adhesive strength than Comparative Example 1.

Test Example 7 Crack Resistance

Crack correspondence tests were performed on the compositions prepared according to Examples 1 to 3 and the compositions prepared according to Comparative Example 1, and the results are shown in Table 6 below.

division Example 1 Example 2 Example 3 Comparative Example 1 Crack Resistance -20 ° C clear clear clear clear 20 ℃ clear clear clear clear After accelerated weathering test clear clear clear clear

As shown in Table 6, it was found that the composition prepared according to Examples 1 to 3 and the composition prepared according to Comparative Example 1 had no abnormality in crack correspondence.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, This is possible.

Claims (13)

An eco-friendly finish composition for protecting concrete surfaces,
From 5 to 95% by weight of an inorganic binder, from 1 to 40% by weight of a fine aggregate, from 0.01 to 50% by weight of an improving agent for improving durability, and from 0.1 to 20% by weight of water,
The endurance performance improving admixture may comprise from 35 to 99% by weight of network-structured acrylic emulsion, from 0.1 to 35% by weight of acrylonitrile styrene, from 0.01 to 30% by weight of 2-chloroethyl acrylate and from 0.01 to 20% by weight of polysulfide Include
The inorganic binder is Portland cement 20 to 95% by weight of steel, calcium aluminate cement 0.1 to 30% by weight, the powder also has 3,000 ~ 9,000 cm ² / g of blast furnace slag fine powder 0.1 to 30% by weight of gel-light powder of 0.1 to 20 wt. 0.1 to 20% by weight of cobalt carbonate powder, 0.1 to 20% by weight of desulfurization gypsum, 0.1 to 20% by weight of diironite, 0.01 to 10% by weight of aluminum hydroxide, 0.01 to 10% by weight of alcohol alkylene oxide oxide, , 0.01 to 10% by weight of at least one material selected from melamine and lignin high performance water reducing agents, 0.01 to 10% by weight of retarding agent, and 0.01 to 10% by weight of pigment
Wherein the surface of the concrete is coated with a coating composition.
The method according to claim 1,
Wherein the durable performance improving admixture further comprises 0.01 to 10 wt% of a mixture of a polycarbonate fluidizing agent and a melamine-based fluidizing agent in a weight ratio of 1: 0.1 to 0.9.
3. The method of claim 2,
Wherein the durability improving admixture further comprises 0.01 to 10% by weight of sodium polyacrylate.
The method of claim 3,
Wherein the durable performance improving admixture further comprises 0.001 to 10 wt% of dimethyl silicone.
5. The method of claim 4,
Wherein the endurance performance improving admixture further comprises 0.001 to 10 wt% of isoprene acrylonitrile rubber.
6. The method of claim 5,
Wherein the durability improving admixture further comprises 0.01 to 10 wt% of a defoaming agent.
delete delete delete delete delete A method for protecting the surface of a concrete structure using the eco-friendly finishing composition for protecting a concrete surface as set forth in any one of claims 1 to 6,
Chipping away impurities or deteriorated portions of the concrete structure;
Cleaning the chipped portion;
Applying a primer to improve adhesion of the base concrete structure and the eco-friendly finishing composition for protecting the concrete surface, to inhibit water penetration and chlorine ion penetration, and to improve water resistance and waterproofness;
Applying the eco-friendly finish composition for protecting the concrete surface;
Applying a surface protective agent on top of the applied environmentally friendly finishing composition to improve resistance to salt, neutralization resistance, surface hardness, water resistance and water resistance; And
Curing step
And the surface of the concrete structure is protected.
13. The method of claim 12,
Wherein the surface protective agent comprises at least one of an acryl-urethane, a silicate-based inorganic surface protective agent, a silane-based penetration enhancer, and the endurance improving admixture.