KR101813026B1 - Floor finishing material with self-leveling for floor finishing of concrete slab and construction method for floor finishing of concrete slab therewith - Google Patents

Abstract

The present invention includes 45-90 wt% of quick-drying inorganic binder, 5-50 wt% of fine aggregate, 0.1-30 wt% of improved performance admixture, and 1-25 wt% of water. The quick-drying inorganic binder includes 35-90 wt% of crude steel cement, 1-45 wt% of alumina, 1-30 wt% of sericite, 1-15 wt% of gypsum, 1-15 wt% of volcanic ash, 1-15 wt% of phyllite powder, 0.1-15 wt% of calcium silicate, and 0.01-15 wt% of sepiolite. The present invention relates to: a self-leveling floor finish composition with improved high flowability, initial strength development, adhesion, durability, and self-leveling ability; and a concrete slab floor finish construction method using the same.

Description

FIELD OF THE INVENTION The present invention relates to a self-leveling floor finish composition for a concrete slab floor finish and a concrete slab floor finish construction method using the same. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-

The present invention relates to a self-leveling flooring finish composition and a concrete slab floor finishing method using the same, and more particularly, to a self-leveling flooring finishing composition for finishing a concrete floor by a quick-drying inorganic binder and a performance improving admixture, The present invention relates to a concrete slab bottom finishing method and a concrete slab bottom finishing method.

Generally, cement concrete is produced by cement and hydration reaction. It has low chemical resistance such as acid resistance and chemical resistance, and it has low abrasion resistance because of its texture. Therefore, Which is deteriorated by the carbonic acid gas contained in the exhaust gas. In order to complement and improve the above disadvantages and obtain a visual effect, a finishing material has been developed and applied.

The currently used floor finishes can be divided into organic finishes and inorganic finishes depending on the main component. The organic type is a product using epoxy or urethane resin. It is a polymer type that forms a cross-linking at room temperature and is made of a petrochemical derivative. It has excellent texture and can be implemented almost as desired, It can give elasticity and anti-slip function and it is easy to maintain after maintenance.

However, organic coating agents such as epoxy and urethane are harmful to the human body due to the use of organic solvents and make the working environment poor, and the bottom coating layer formed of the organic coating agent has a problem of noise generation and flammability. In addition, most of the conventional floor coating agents are not environmentally friendly due to release of volatile organic compounds (VOC) and other toxic gases at the initial stage of curing when a fire occurs, resulting in leakage of harmful components upon contact with moisture, It is difficult to apply to the workplace where it is highlighted. Particularly, in the case of epoxy, even if the curing is completed, there is a problem that the epoxy itself contains a harmful resin which is harmful to human body, especially bisphenol A environmental hormone.

On the other hand, inorganic finish materials using a composition of self-leveling mortar have many data and patents disclosed and applied in the field. However, although the characteristics of the material have the self-leveling property, when applied to a practical site, the self-leveling is not performed properly depending on the characteristics of the adhered material. In addition, there is a possibility that peeling may occur or cracks may occur due to insufficient adhesive strength to the remaining base, which is centered on the horizontal property. Accordingly, there is a double difficulty in that a simple cementitious finish can not have a function as a final color finishing material and another color finishing material should be applied to the top of the cementitious finish.

Korean Patent No. 10-0837790 (published on June 13, 2008) Korean Patent No. 10-1540926 (issued on August 05, 2015)

The object of the present invention is to provide a self-leveling floor finish composition having improved self-leveling property, i.e. self-leveling performance, including high fluidity, initial hardenability, adhesive strength and durability, and a concrete slab floor finish And a method of construction.

The self-leveling flooring finish composition for solving the problems of the present invention comprises 45 to 90% by weight of quick-drying inorganic binder, 5 to 50% by weight of fine aggregate, 0.1 to 30% by weight of performance improving admixture and 1 to 25% by weight of water. Wherein the performance improving admixture comprises 35 to 99% by weight of a diethyl vinyl acetate-diacrylate copolymer, 0.1 to 30% by weight of a styrene-vinyl acetate copolymer, 0.1 to 25% by weight of a methyl methacrylate- acrylonitrile copolymer, 0.1 to 25% by weight of acrylate-vinyl acrylate copolymer, 0.01 to 10% by weight of a vinyl acetate-vinyl versatate copolymer and 0.01 to 10% by weight of an anti-segregation agent.

In the composition of the present invention, the quick-drying inorganic binder includes 35 to 90 wt% of crude steel cement, 1 to 45 wt% of alumina cement, 1 to 30 wt% of sericite, 1 to 15 wt% of gypsum, 1 to 15 wt% 1 to 15% by weight of powder, 0.1 to 15% by weight of calcium silicate, and 0.01 to 15% by weight of sepiolite.

In addition, the quick-drying inorganic binder may further include 0.01 to 10% by weight of pigment, 0.01 to 10% by weight of accelerator, and 0.01 to 5% by weight of retarder, relative to the quick-drying inorganic binder And may further contain 0.01 to 5% by weight of a water reducing agent.

In the composition of the present invention, the performance improving admixture may further include 0.01 to 5% by weight of an antifoaming agent relative to the performance improving admixture, may further include 0.01 to 5% by weight of a fluidizing agent, % ≪ / RTI > by weight. At this time, the stabilizer may be at least one selected from sulfonate alkyl ester, fatty acid soap, and alkylaryl sulfonate.

A concrete slab floor finishing method for solving the problems of the present invention includes a step of removing a floor, impurities, and a damaged part of a concrete floor using a planer, a grinder, a short blaster, a water jet, Applying a surface protective agent to the surface of the cleaned floor to prevent foreign matter from penetrating and strengthening the surface of the cleaned floor surface, and applying the self-leveling flooring composition A step of coating and curing, and a step of applying a surface-hardening coating agent on the top to improve the surface hardness, stain resistance, gloss and the like after curing.

In the method of the present invention, the surface protecting agent may be at least one selected from the group consisting of methyl methacrylate-butyl acrylate copolymer, polyacrylic ester, ethylene vinyl acetate, and the performance improving admixture. The surface-strengthening coating agent may be selected from acrylic-urethane copolymer resins, epoxy, urethane, polyurea, and inorganic coating agents.

According to the self-leveling flooring composition having performance improving admixture of the present invention and the concrete slab floor finishing method using the self-leveling flooring composition containing the quick-setting inorganic binder and the performance improving admixture, The self-leveling property can be improved along with strength development, adhesion, durability and the like. Further, the composition is excellent in fire safety as a non-combustible material, and the bonding force is improved by the integrated behavior with existing concrete slabs. In addition, it has excellent self-leveling, easy construction, good abrasion resistance, less abrasion even in long-term use, excellent gloss, excellent appearance, excellent non-slip effect, and low friction noise. In addition, the use of quick-drying inorganic binders makes it possible to fine-tune the organization. In addition, it is excellent in light weight, heat insulation, antimicrobial property, deodorization, strength and durability by using sericite having far infrared effect, antibacterial and deodorizing effect.

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.

An embodiment of the present invention is a self-leveling floor finish composition having improved self-leveling properties such as high flowability, initial strength development, adhesion strength, durability, etc. by using a self-leveling flooring composition containing a quick-drying inorganic binder and a performance improving admixture The concrete slab floor finishing method is proposed. Here, the term "concrete structure" refers to a concrete structure having a floor surface such as a floor of a factory, a concrete floor of a concrete building (roof, an indoor or outdoor parking lot, etc.), a concrete pavement such as a road, a pedestal floor, an underground structure, It means all concrete structures.

The self-leveling flooring finish composition of the present invention imparts self-leveling properties to the bottom surface of a concrete structure and is mixed with 45 to 95% by weight of quick-drying inorganic binder, 0.1 to 30% by weight of performance improving admixture and 1 to 25% by weight of water . The self-leveling flooring finish composition can be prepared by stirring in a forced mixer or continuous mixer for 2 to 3 minutes at 45 to 95 weight percent of a quick-drying inorganic binder, 0.1 to 30 weight percent of a performance enhancing admixture, and 1 to 25 weight percent of water have. The performance improving admixture may also be selected from the group consisting of diethyl vinyl acetate-diacrylate copolymer, styrene-vinyl acetate copolymer, methyl methacrylate-acrylonitrile copolymer, methyl methacrylate-butyl acrylate copolymer, vinyl acetate- Polysaccharides, polysaccharides, polysaccharides, polysaccharides, polysaccharides and polysaccharides.

The quick-drying inorganic binder of the present invention comprises 35 to 90% by weight of crude steel cement, 1 to 45% by weight of alumina cement, 1 to 30% by weight of sericite, 1 to 15% by weight of gypsum, 1 to 15% by weight of volcanic ash, % Of calcium silicate, 0.1 to 15% by weight of calcium silicate, and 0.01 to 15% by weight of sepiolite. The crude steel cement has a blaine powder degree of 4,500 to 8,000 cm 2 / g, and the blast powder of ordinary ordinary portland cement has a very fine particle size of about 2,800 to 3,500 cm 2 / g. Therefore, not only the early strength of the cement is high but also the long term strength of the cemented body is also increased. The crude steel cement is preferably contained in an amount of 35 to 90% by weight with respect to the quick-drying inorganic binder.

The alumina cement is an inorganic quick-setting material added to increase hydration reactivity and to suppress cracking. It reacts with water in an instant when it comes into contact with water to form an ettringite hydrate, and when mixed with crude steel cement And an excellent compressive strength can be obtained within a short time. The alumina cement is preferably contained in an amount of 1 to 45% by weight based on the quick-drying inorganic binder. When the weight ratio of the alumina cement is increased, fast curing property is exhibited. If the content is more than 45 wt%, good physical properties can be obtained due to quick curing property, but it is not economical due to high production cost. The generation inhibiting effect is small.

The sericite has a strong adsorption power and a far-infrared ray emission to have a bioactivity effect, and is used for imparting deodorizing, antibacterial performance and improving waterproof performance. The sericite may be contained in an amount of 1 to 30% by weight based on the fast drying inorganic binder. If the content of the sericite exceeds 30% by weight, the performance is improved but the price competitiveness is deteriorated. If the content is less than 1% by weight, the performance improvement effect is reduced.

The gypsum is used for early strength development. The gypsum can be anhydrous gypsum or anthracite. When the content of gypsum is increased, it shows fast curing property. When the content exceeds 15% by weight, good physical properties can be obtained due to quick curing property, but workability is lowered. When the content is less than 1% by weight, The effect is poor.

The volcanic ash is used for potential hydraulic properties, long-term strength development and durability enhancement. As the weight ratio of ash increases, early strength decreases but long-term strength development and durability increase. The volcanic ash is preferably contained in an amount of 1 to 15% by weight based on the quick-drying inorganic binder. If the content of the volcanic ash exceeds 15% by weight, the initial strength development is delayed. If the content is less than 1% by weight, the performance improvement effect is deteriorated.

The phyllotaxel powder has pozzolanic properties and is used for obtaining long-term strength development and durability improvement effects as well as index and self-healing effects. It is preferable that the above-mentioned cyanide powder is contained in an amount of 1 to 15% by weight with respect to the quick-drying inorganic binder. If the content of the cyanophyll powder exceeds 15 wt%, the initial strength development is delayed. If the content is less than 1 wt%, the performance improvement effect is deteriorated.

The calcium silicate increases the penetration resistance to chloride ions in the early ages by making the structure of the cement densified by the sufficient amount of etrinite from the beginning. The calcium silicate is preferably contained in an amount of 0.1 to 15% by weight based on the quick drying inorganic binder. If the content of the calcium silicate is less than 0.1 wt%, the strength and workability may be deteriorated. If the content of the calcium silicate is more than 15 wt%, good physical properties can be obtained due to quick curing property, but it is likely to expand.

The sepiolite is used to improve the viscosity and workability of the composition and to prevent the material separation phenomenon. When the weight ratio of the sepiolite is increased, the viscosity is increased and the workability is lowered. The amount of the sepiolite is preferably 0.01 to 15% by weight based on the quick-drying inorganic binder. When the content of the sepiolite exceeds 15% by weight, the viscosity increases and the workability decreases. When the content is less than 0.01% by weight, the performance improving effect is deteriorated and the material separation phenomenon is likely to occur.

The fast drying inorganic binder may further comprise a retarding agent for delaying rapid curing. The retarder is for ensuring workability for a certain period of time and can delay the rapid curing of the composition. The retarder is preferably contained in an amount of 0.01 to 5% by weight based on the quick-drying 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, citric acid and citric acid, an amino carboxylic acid or its salt, a phosphonic acid or a derivative thereof, and a polyhydric alcohol such as glycerin.

In addition, the quick-drying inorganic binder may further contain 0.01 to 10% by weight of pigment to impart an aesthetic or identification function. The pigment may be various conventional pigments, and inorganic pigments are particularly preferred. The inorganic pigments may include titanium oxide (white), red iron oxide, yellow iron oxide, chromium oxide (Cr ₂ O ₃ ), purple iron oxide, black iron oxide, carbon black and the like.

In addition, the quick-drying inorganic binder may further include 0.01 to 5% by weight of a water reducing agent for reducing the water-cement ratio to improve strength and durability. The water reducing agent reduces the water-cement ratio of the composition to improve strength and durability. The water reducing agent may be a polycarbonate-based, melamine-based or naphthalene-based fluidizing agent. The melamine-based or naphthalene-based water reducing agent is less effective in improving the strength and durability than the polycarboxylic acid-based water reducing agent, has less effect of reducing the water-cement ratio, and improves performance. When mixed with an admixture, There are disadvantages. Therefore, the water reducing agent is preferably a polycarboxylic acid based water reducing agent, and is preferably contained in an amount of 0.01 to 5% by weight based on the quick-drying inorganic binder.

The accelerator has a very fast reaction rate when it comes into contact with water, and when mixed with cement, it can obtain the compressive strength obtained within several days within a few hours. Such accelerators are generally known materials such as calcium formate, calcium chloride such as calcium chloride and calcium nitrate, chloride such as magnesium chloride, sulfate, potassium hydroxide, sodium hydroxide, carbonate, formic acid or its salt, lithium carbonate and the like And the promoter is contained in the fast drying inorganic binder in an amount of 0.01 to 10% by weight.

Performance enhancing admixtures comprising the self-leveling flooring composition of the present invention improve pot life, workability, elasticity, self-leveling performance and durability. The performance improving admixture may be selected from the group consisting of diethyl vinyl acetate-diacrylate copolymer, styrene-vinyl acetate copolymer, methyl methacrylate-acrylonitrile copolymer, methyl methacrylate-butyl acrylate copolymer, vinyl acetate- It is a performance improving admixture which is a mixture of a copolymer and a material separation preventing agent. The performance improving admixture is preferably contained in an amount of 0.1 to 30% by weight based on the self-leveling flooring composition. Improvement of performance When the content of the admixture is more than 30% by weight, separation of the material tends to occur, and the hydration reaction is delayed to lower the early compressive strength development and reduce the price competitiveness. When the content of the performance improving admixture is less than 0.1% by weight, the toughness, self-leveling performance and durability are degraded.

 The diethyl vinyl acetate-diethylene copolymer is used to improve strength and durability. The diethyl vinyl acetate-diethylene copolymer is preferably contained in an amount of 35 to 99% by weight based on the admixture. If the content of the diethyl vinyl acetate-diacrylate copolymer is greater than 99% by weight, the strength and durability are improved but the price competitiveness is deteriorated. If the content is less than 35% by weight, the effect of improving the strength and durability is deteriorated.

The styrene-vinyl acetate copolymer improves viscosity control and adhesion. The styrene-vinyl acetate copolymer is preferably contained in an amount of 0.1 to 30% by weight based on the performance improving admixture. If the content of the styrene-vinyl acetate copolymer exceeds 30% by weight, the adhesion strength is improved but the viscosity is increased and the workability is deteriorated. If the content is less than 0.1% by weight, the material separation phenomenon tends to occur.

The methyl methacrylate-acrylonitrile copolymer is used to improve watertightness and durability. The methyl methacrylate-acrylonitrile copolymer is preferably contained in an amount of 0.1 to 25% by weight based on the performance improving admixture. If the content of the methyl methacrylate-acrylonitrile copolymer exceeds 25% by weight, the durability is improved but the viscosity is increased and the workability is lowered. If the content of the methyl methacrylate-acrylonitrile copolymer is less than 0.1% by weight, the water tightness and durability improvement effects are insufficient .

The methyl methacrylate-butyl acrylate copolymer has a property of curing at room temperature, excellent in tensile strength and stretching ability, and maintains the initial film shape even in a wet state. The methyl methacrylate-butyl acrylate copolymer has an effect of improving strength and improving durability such as resistance to salt and freeze-thaw resistance. The methyl methacrylate-butyl acrylate copolymer is preferably contained in an amount of 0.1 to 25% by weight based on the performance improving admixture. If the content of the methyl methacrylate-butyl acrylate copolymer is more than 10% by weight, the strength and durability are improved but the viscosity is increased and the workability is lowered. If the content is less than 0.1% by weight, the effect of improving the strength and durability is insufficient .

The vinyl acetate-vinyl versatate copolymer has improved adhesion, toughness, elasticity and durability. The vinyl acetate-vinyl versatate copolymer is preferably contained in an amount of 0.01 to 10% by weight based on the performance improving admixture. If the content of the vinyl acetate-vinyl versatate copolymer exceeds 10% by weight, the strength and durability are improved but the viscosity is increased and the workability is lowered. If the content is less than 0.01% by weight, the effect of improving the strength and durability is insufficient .

The material separation preventing agent can form a stable concrete structure by imparting fluidity, cohesion and material separation prevention property, and incidentally, it can have a side effect such as prevention of underwater contamination due to excellent cohesive force and protection of reinforcing bars of the structure. As the material separation preventing agent, it is preferable to use a mixture of methylcellulose and polyacrylamide in a ratio of 1: 0.1 to 0.5 in a mass ratio. The material separation preventing agent is preferably contained in an amount of 0.01 to 10% by weight based on the performance improving admixture. If the content of the material separation preventing agent exceeds 10% by weight, the fluidity and the material separation prevention property are improved but the viscosity is increased and the workability is lowered. If the content is less than 0.01% by weight, the material separation phenomenon tends to occur.

 The performance improving admixture may further include an antifoaming agent for removing pores in the performance improving admixture to increase strength and durability. In addition, when the defoaming agent is added to the performance improving admixture, the air entraining effect is imparted to improve the workability and the pot life. The antifoaming agent is preferably contained in an amount of 0.01 to 5% by weight based on the performance improving admixture.

Examples of the defoaming agent include alcohol defoaming agents, silicone defoaming agents, fatty acid defoaming agents, oil defoaming agents, ester defoaming agents and oxyalkylene defoaming agents. Examples of the silicone defoaming agent include dimethyl silicone oil, polyorganosiloxane, and fluorosilicone oil. Examples of the fatty acid defoaming agent include stearic acid and oleic acid. Examples of the oil-based antifoaming agents include kerosene, animal and plant oil, and castor oil. Examples of the ester type antifoaming agents include solitol trioleate, glycerol monoricinolate, and the like. Examples of the oxyalkylene antifoaming agents include polyoxyalkylene, acetylene ethers, polyoxyalkylene diisocyanate esters, and polyoxyalkylene alkylamines. Examples of the alcohol-based defoaming agent include glycol.

The performance improving admixture may further include a fluidizing agent for reducing the water-cement ratio to improve strength and durability and to improve workability. The fluidizing agent can ensure the fluidity of the performance improving admixture. Performance Improvement Self-leveling performance is improved when the fluidizing agent is added to the admixture. The fluidizing agent is preferably contained in an amount of 0.01 to 5% by weight based on the performance improving admixture. The fluidizing agent may be a polycarboxylic acid type, melamine type or naphthalene type fluidizing agent, but the naphthalene type and melamine type may lower the strength of the composition and lower the workability (water-cement ratio) It is preferable to use a polycarboxylic acid-based fluidizing agent which does not lower the water-cement ratio (water-cement ratio).

In addition, the performance improving admixture may further include a stabilizer for suppressing entanglement of the polymer particles. That is, the stabilizer is used to disperse the particles of the performance improving admixture well and prevent them from being bonded to each other. The stabilizer is preferably contained in an amount of 0.01 to 3% by weight based on the performance improving admixture. As the stabilizer, there are sulfonate alkyl ester, fatty acid soap, alkyl aryl sulfonate and the like, but it is preferable to use a sulfonate alkyl ester.

The fine aggregate preferably contains 50 to 98 wt% of sericite, 1 to 30 wt% of silica silica, and 0.1 to 30 wt% of elvanite.

The sericite is a aggregate material with strong adsorption power and far-infrared ray emission, and has bioactivity effect, deodorization ability, antibacterial performance and is used for waterproof performance. The sericite may be contained in an amount of 50 to 98% by weight based on the fine aggregate. If the content of the sericite exceeds 99 wt%, the performance improvement effect becomes insufficient and the price competitiveness decreases. If the content is less than 50 wt%, the performance improvement effect decreases.

It is preferable that the silica silica has a particle size of from 4 to 8 (0.05 to 3.0 mm). If the particle size of the silica silicate is larger than this range, the fluidity may be lowered, and if it is smaller than this range, the workability may be deteriorated. The silica silica is preferably contained in an amount of 1 to 30% by weight based on the fine aggregate.

The quartzite is a fine porous structure of quartz and feldspathic rocks on a green background. It is composed of anhydrous silicic acid and aluminum oxide as main components and is composed of iron oxide and calcium, magnesium, germanium, It contains about 45 kinds of minerals such as selenium. As a result of the porous nature of elvan, it is possible to absorb, decompose and remove water vapor, pollutants, organic matter, and germs, and when immersed in water, major components such as trace enzymes, iron, magnesium, calcium and germanium are eluted, (COD, BOD, and Biochemical Oxygen Demand) is lowered by increasing the oxygen supply to prevent spoilage of water. Especially because it is made of multi-element and porous, So that it removes impurities and odors in the water and prevents water from decaying. In the present invention, as described above, elvan, which plays a role of elution of mineral components, adsorption of harmful substances, high ion exchangeability, neutralization of acid and base, is pulverized to 0.05 to 3 mm. The granite powder is preferably contained in an amount of 0.1 to 30% by weight based on the fine aggregate. When the content of the elvan is less than 0.1% by weight, the absorption action and ion exchangeability may be deteriorated. When the content of the elvan is more than 30% by weight, good physical properties can be obtained, but the production cost is high and it is not economical.

The concrete slab bottom finishing method according to an embodiment of the present invention includes the steps of removing a floor, impurities, and damaged portions of a concrete floor surface using a planer, a grinder, a short blaster, a water jet, Applying a surface protective agent to prevent penetration of foreign matter or the like on the cleaned floor surface and strengthening the surface of the cleaned floor surface; applying the self-leveling flooring composition on top of the surface- And then applying a surface-hardening coating agent to the top surface to improve the surface hardness, stain resistance, gloss and the like after curing.

In the method of the present invention, the surface protecting agent may be at least one selected from the group consisting of methyl methacrylate-butyl acrylate copolymer, polyacrylic ester, ethylene vinyl acetate, and the performance improving admixture. The surface-strengthening coating agent may be selected from acrylic-urethane copolymer resins, epoxy, urethane, polyurea, and inorganic coating agents.

Embodiments of the self-leveling flooring finish composition according to the present invention as described above are more specifically shown and the present invention is not limited by the following embodiments.

≪ Example 1 >

42% by weight of quick-drying inorganic binder, 30% by weight of fine aggregate, 8% by weight of performance improving admixture and 20% by weight of water were added to a forced mixer and stirred for 1 to 3 minutes to prepare a self-leveling flooring composition.

The quick-drying inorganic binder includes 40 wt% crude steel cement, 20 wt% alumina cement, 10 wt% sericite, 10 wt% calcium silicate, 5 wt% gypsum, 5 wt% volcanic ash, 5 wt% , 1% by weight of pigment, 1% by weight of accelerator, 1% by weight of retarder and 1% by weight of water reducing agent. Green iron oxide was used as the pigment. Lithium carbonate was used as the accelerator. As the retarder, citric acid was used. A polycarboxylic acid-based water reducing agent was used as the water reducing agent.

The performance improving admixture was prepared by mixing 93 wt% of a vinyl acetate-diacrylate maleate, 2 wt% of a styrene-vinyl acetate copolymer, 1 wt% of a methyl methacrylate-acrylonitrile copolymer, 1% by weight of a copolymer, 1% by weight of a vinyl acetate-vinyl versatate copolymer, 0.5% by weight of an anti-segregation agent, 0.5% by weight of an antifoam agent, 0.5% by weight of a fluidizing agent and 0.5% by weight of a stabilizer. The material separation preventing agent used was a mixture of methylcellulose and polyacrylamide in a mass ratio of 1: 0.2. The defoamer was a silicone defoamer. The fluidizing agent used was a polycarboxylic acid-based fluidizing agent. The stabilizer used was a sulfonate alkyl ester.

≪ Example 2 >

42% by weight of quick-drying inorganic binder, 30% by weight of fine aggregate, 8% by weight of performance improving admixture and 20% by weight of water were added to a forced mixer and stirred for 1 to 3 minutes to prepare a self-leveling flooring composition.

The quick-drying inorganic binder includes 40 wt% crude steel cement, 20 wt% alumina cement, 10 wt% sericite, 10 wt% calcium silicate, 5 wt% gypsum, 5 wt% volcanic ash, 5 wt% , 1% by weight of pigment, 1% by weight of accelerator, 1% by weight of retarder and 1% by weight of water reducing agent. Green iron oxide was used as the pigment. Lithium carbonate was used as the accelerator. As the retarder, citric acid was used. A polycarboxylic acid-based water reducing agent was used as the water reducing agent.

The performance enhancing admixture comprised 88 wt% of vinyl acetate-diacrylate maleate, 4 wt% styrene-vinyl acetate copolymer, 2 wt% methyl methacrylate-acrylonitrile copolymer, methyl methacrylate- 2% by weight of a copolymer, 2% by weight of a vinyl acetate-vinyl versatate copolymer, 0.5% by weight of an anti-segregation agent, 0.5% by weight of an antifoamer, 0.5% by weight of a fluidizing agent and 0.5% by weight of a stabilizer. The material separation preventing agent used was a mixture of methylcellulose and polyacrylamide in a mass ratio of 1: 0.2. The defoamer was a silicone defoamer. The fluidizing agent used was a polycarboxylic acid-based fluidizing agent. The stabilizer used was a sulfonate alkyl ester.

≪ Example 3 >

42% by weight of quick-drying inorganic binder, 30% by weight of fine aggregate, 8% by weight of performance improving admixture and 20% by weight of water were added to a forced mixer and stirred for 1 to 3 minutes to prepare a self-leveling flooring composition.

The quick-drying inorganic binder includes 40 wt% crude steel cement, 20 wt% alumina cement, 10 wt% sericite, 10 wt% calcium silicate, 5 wt% gypsum, 5 wt% volcanic ash, 5 wt% , 1% by weight of pigment, 1% by weight of accelerator, 1% by weight of retarder and 1% by weight of water reducing agent. Green iron oxide was used as the pigment. Lithium carbonate was used as the accelerator. As the retarder, citric acid was used. A polycarboxylic acid-based water reducing agent was used as the water reducing agent.

The performance improving admixture was prepared by mixing 83 wt% of a vinyl acetate-diacrylate maleate, 6 wt% of a styrene-vinyl acetate copolymer, 3 wt% of a methyl methacrylate-acrylonitrile copolymer, 3% by weight of a copolymer, 3% by weight of a vinyl acetate-vinyl versatate copolymer, 0.5% by weight of an anti-segregation agent, 0.5% by weight of a defoamer, 0.5% by weight of a fluidizing agent and 0.5% by weight of a stabilizer. The material separation preventing agent used was a mixture of methylcellulose and polyacrylamide in a mass ratio of 1: 0.2. The defoamer was a silicone defoamer. The fluidizing agent used was a polycarboxylic acid-based fluidizing agent. The stabilizer used was a sulfonate alkyl ester.

Comparative Examples which can be compared with the embodiments of the present invention are shown in order to more easily grasp the characteristics of Examples 1 to 3. Comparative Examples 1 and 2 to be described later are examples of the common cement A mortar composition and a polymer-cement mortar composition.

≪ Comparative Example 1 &

42 wt% of Portland cement, 30 wt% of fine aggregate, 8 wt% of diethyl vinyl acetate-maleate and 20 wt% of water were added to a forced mixer and stirred for 1 to 3 minutes to prepare a cement mortar composition.

The following experimental examples show experimental results comparing characteristics of embodiments of the present invention with those of Comparative Example 1 in order to more easily grasp characteristics of Embodiments 1 to 3 according to the present invention.

≪ Test Example 1 >

A flow test (degree of kneading) was carried out according to the method defined in KS F 4041 (cement mortar horizontal mortar) of the self-leveling flooring finish composition of Examples 1 to 3 and the cement mortar composition prepared by Comparative Example 1 Respectively. The flow test is to test the dough of the composition such as the flue and viscosity of the composition. The larger the value, the better the workability, that is, the workability at the time of pouring the composition. Table 1 below shows the change in flow over time.

division Flow (mm) Immediately after stirring After 30 minutes After 60 minutes Example 1 220 214 210 Example 2 225 219 215 Example 3 228 224 223 Comparative Example 1 210 202 195

Table 1 shows that Examples 1 to 3 are superior in workability as compared with Comparative Example 1, and in particular, Example 3 shows excellent workability because the change in flow is not large even after a lapse of time .

≪ Test Example 2 &

The compressive strength tests were carried out according to the methods described in KS F 4041 (cement mortar horizontal mortar) of the self-leveling flooring composition according to Examples 1 to 3 and the cement mortar composition prepared according to Comparative Example 1. Table 2 below shows the change in compressive strength with time.

division Compressive strength (kgf / cm2) After 1 day After 7 days After 28 days Example 1 152 292 338 Example 2 166 301 348 Example 3 180 309 362 Comparative Example 1 135 270 311

According to Table 2, in Examples 1 to 3, the compressive strength was much higher than that of Comparative Example 1 after curing.

≪ Test Example 3 >

The flexural strengths of the self-leveling flooring finish compositions of Examples 1 to 3 and the cement mortar composition of Comparative Example 1 were measured according to the method specified in KS F 4041 (cement mortar horizontal mortar). Table 3 below shows the changes in flexural strength with time.

division Bending strength (㎏f / ㎠) After 1 day After 7 days After 28 days Example 1 49 73 110 Example 2 55 78 117 Example 3 58 84 128 Comparative Example 1 41 67 100

As shown in Table 3, the flexural strengths of Examples 1 to 3 were higher than those of Comparative Example 1.

<Test Example 4>

The bond strengths of the self-leveling flooring composition of Examples 1 to 3 and the cement paste composition prepared by Comparative Example 1 were measured by KS F 4041 (cement mortar horizontal mortar). The results are shown in Table 4 Respectively.

division Bond strength (kgf / cm2) After 1 day After 7 days After 28 days Example 1 14 18 21 Example 2 15 19 22.5 Example 3 16 20 24.5 Comparative Example 1 - 14 18.5

As shown in Table 4, it was confirmed that Examples 1 to 3 were much better than Comparative Example 1 in adhesion strength.

&Lt; Test Example 5 >

The impact resistance performance tests were carried out according to the methods described in KS F 4041 for the self-leveling floor finish composition of Examples 1 to 3 and the cement paste composition prepared by Comparative Example 1. The results are shown in Table 5.

division Example 1 Example 2 Example 3 Comparative Example 1 Impact performance clear clear clear clear

As shown in Table 5, in Examples 1 to 3, no cracking or peeling occurred.

&Lt; Test Example 6 >

The lengthwise rate of change test was carried out according to the method described in KS F 4041 for the self-leveling flooring composition of Examples 1 to 3 and the cement paste composition prepared by Comparative Example 1. [ The results are shown in Table 6.

division Example 1 Example 2 Example 3 Comparative Example 1 Length change rate (%) 0.01 0.005 0.003 0.014

As shown in Table 6, it can be seen that Examples 1 to 3 have smaller rate of change in length than Comparative Example 1 and excellent crack resistance.

&Lt; Test Example 7 >

The abrasion resistance test was conducted according to the method described in KS F 4041 for the self-leveling flooring composition of Examples 1 to 3 and the cement paste composition prepared by Comparative Example 1. The results are shown in Table 7.

division Example 1 Example 2 Example 3 Comparative Example 1 Abrasion resistance
(mg / mm ² ) 0.07 0.05 0.03 0.1

As shown in Table 7, it can be seen that Examples 1 to 3 are superior to Comparative Example 1 in abrasion resistance.

<Test Example 8>

Table 8 shows the measurement results of the water absorption ratio according to the method of KS F 2476 for the self-leveling flooring composition of Examples 1 to 3 and the cement mortar composition prepared by Comparative Example 1. [ If the water absorption rate is high, impurities or water penetrate into the concrete, which increases the porosity inside the concrete, thereby causing a problem of causing damage to the structure.

division Example 1 Example 2 Example 3 Comparative Example 1 Absorption Rate (%) 0.3 0.25 0.18 0.5

According to Table 8, the absorption rates of Examples 1 to 3 were lower than those of Comparative Example 1.

&Lt; Test Example 9 >

The penetration depth test of chloride ion by KS F 2476 was performed on the self-leveling flooring composition of Examples 1 to 3 and the cement mortar composition prepared by Comparative Example 1, and the results are shown in Table 9.

division Example 1 Example 2 Example 3 Comparative Example 1 Chloride ion penetration depth (mm) 0.8 0.6 0.4 1.0

As shown in Table 9, it was confirmed that Examples 1 to 3 had less chloride ion penetration depth than Comparative Example 1 and were more resistant to salt attack.

&Lt; Test Example 10 &

The freeze-thaw resistance test was carried out according to the method described in KS F 2560 for the self-leveling floor finish composition of Examples 1 to 3 and the cement mortar composition prepared by Comparative Example 1. [ Freezing and thawing means that the water absorbed in the concrete is frozen and melted. When freezing and thawing is repeated, fine cracks are generated in the concrete structure and the durability is lowered. Table 10 shows the durability indexes of the respective examples and comparative examples according to the freeze-thaw resistance test.

division Example 1 Example 2 Example 3 Comparative Example 2 Durability index 93 96 96 90

According to Table 10, it was found that the durability was improved because the durability indexes of Examples 1 to 3 were much higher than those of Comparative Example 1.

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 (5)

A self-leveling floor finish composition for a concrete slab floor finish,
42% by weight of quick-drying inorganic binder, 30% by weight of fine aggregate, 8% by weight of performance improving admixture and 20% by weight of water,
The quick-drying inorganic binder includes 40 wt% crude steel cement, 20 wt% alumina cement, 10 wt% sericite, 10 wt% calcium silicate, 5 wt% gypsum, 5 wt% volcanic ash, 5 wt% 1% by weight of pigment, 1% by weight of accelerator, 1% by weight of retarder and 1% by weight of water reducing agent,
Wherein the fine aggregate comprises 50 to 98 wt% of sericite, 1 to 30 wt% of silica silica, and 0.1 to 30 wt% of elvanite,
The performance improving admixture was prepared by mixing 83 wt% of a vinyl acetate-diacrylate maleate, 6 wt% of a styrene-vinyl acetate copolymer, 3 wt% of a methyl methacrylate-acrylonitrile copolymer, 3 wt% of a copolymer, 3 wt% of a vinyl acetate-vinyl versatate copolymer, 0.5 wt% of an anti-segregation agent, 0.5 wt% of an antifoaming agent, 0.5 wt% of a fluidizing agent and 0.5 wt%
A flow test was conducted to test the quality of the dough according to the method specified in KS F 4041 (Cement mortar horizontal mortar). As a result, the flow (mm) was 228 immediately after stirring and 223 , And the adhesion strength (㎏f / ㎠). As a result, it was 24.5
&Lt; / RTI &gt; characterized in that the slab flooring is a self-leveling flooring.
delete A concrete slab floor finish construction method using the self-leveling flooring composition according to claim 1,
Removing and cleaning the reclaimed, impure or damaged portion of the concrete floor using a planer, a grinder, a short blaster or a water jet,
Applying a surface protective agent to prevent foreign matter penetration to the cleaned floor surface and to strengthen the surface,
Applying and curing the self-leveling flooring composition on top of which the surface-protective material has been applied, and
After curing, a step of applying a surface-hardening coating agent to the top surface to improve the surface hardness, stain resistance or gloss
Wherein the concrete slab bottom finishing construction method comprises the steps of:
The method of claim 3,
Wherein the surface protecting agent is at least one selected from the group consisting of methyl methacrylate-butyl acrylate copolymer, polyacrylic ester, ethylene vinyl acetate, and the performance improving admixture.

The method of claim 3,
Wherein the surface reinforcing coating agent is any one selected from an acrylic-urethane copolymer resin, epoxy, urethane, polyurea, and an inorganic coating agent.