KR101872266B1 - Eco-friendly floor finishing composition with durability and functionality and finishing method for concrete slab thereof - Google Patents

Abstract

The present invention relates to an eco-friendly floor finishing composition with durability and functionality, and a concrete slab finishing method thereof, wherein the composition contains: 25-95 wt% of a fast curable inorganic binder; 1-50 wt% of fine aggregate; 0.01-25 wt% of an improving admixture; and 1-30 wt% of water. The improving admixture contains: 30-85 wt% of ethylene vinylacetate copolymer; 0.1-30 wt% of polycyclohexane-1,4-dimethyleneterephthalate copolymer; 0.1-25 wt% of polymethacrylstyrene; 0.1-25 wt% of vinyl acetate-vinyl chloride copolymer; 0.01-10 wt% of acrylic acid ester copolymer; and 0.01-10 wt% of an ingredient anti-separator. The present invention can improve high fluidity, initial strength revelation, adhesive force, durability, functionality, and self-levelling property. The composition has fire safety as a non-combustible material and has coupling force improved by behavior integrated with a conventional concrete slab. In addition, the present invention has excellent self-leveling property to be simple to construct, has excellent wear resistance to be hardly worn even though used for a long time, has an excellent gloss to make an aesthetic appearance, has an excellent non-slip effect, and reduces noises with respect to friction.

Description

TECHNICAL FIELD [0001] The present invention relates to an eco-friendly flooring finish composition having durability and functionality, and a concrete slab finishing method using the same. BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

The present invention relates to an eco-friendly floor finish composition and a concrete slab finishing method using the eco-friendly floor finish composition. More particularly, the present invention relates to an eco-friendly composite floor finish composition containing a fast- And a finishing method.

Generally, when exposed to a concrete surface in a concrete structure such as an architectural structure or a factory, the bottom surface is broken or aged due to deterioration of concrete in the long term, causing a problem of environmental pollution due to generation of concrete dust harmful to the human body.

Therefore, in order to keep the environment of these spaces pleasant, it is necessary to improve the floor of the concrete floor, especially the parking lot, to suppress the occurrence of cracks and dusts. Finishes have been developed and applied to complement and improve these drawbacks and to obtain visual effects.

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 resin, urethane resin, unsaturated polyester resin and so on. It is a polymer type that forms a room temperature curing crosslinking type. It is made of a petrochemical induction product. It is excellent in texture, , It can give elasticity and anti-slip function depending on the case where cracks occur, and it is quick to dry and relatively easy to maintain after installation. However, the organic finishing materials such as epoxy, urethane, and unsaturated polyester are harmful to the human body due to the use of the organic solvent and make the working environment poor, and the bottom layer formed of the organic finishing material has a problem of noise generation and flammability. In addition, since most of the conventional flooring finishes are exposed to toxic gas such as volatile organic compounds (VOCs) at the initial stage of curing when a fire occurs, harmful components are released when they come into contact with moisture, There were limitations in application because it was difficult to apply to workplaces where problems were highlighted.

In recent years, many data or patents relating to self-leveling materials using self-leveling mortar compositions have been disclosed and applied in the field. However, although they are self-smoothing properties due to their material properties, It is not possible to have a function as a final finishing material due to a simple cement finishing process, or it may cause a cracking phenomenon. There was a double problem of construction as another finishing material.

Korean Registered Patent No. 10-1073693 (issued October 14, 2011) Korean Patent Publication No. 10-2014-0044535 (published April 15, 2014)

An object of the present invention is to provide an eco-friendly floor finish composition having high fluidity, no shrinkage, early strength development, adhesion, durability and functionality, and a concrete slab finishing method using the same.

An eco-friendly flooring finish composition for solving the problems of the present invention comprises 25 to 95% by weight of a fast-hard inorganic binder, 1 to 50% by weight of a fine aggregate, 0.01 to 25% by weight of a modifying admixture and 1 to 30% by weight of water. Wherein the modifying admixture comprises 30 to 85% by weight of an ethylene-vinyl acetate copolymer, 0.1 to 30% by weight of a polycyclohexane-1,4-dimethylenterephthalate copolymer, 0.1 to 25% by weight of polymethacrylstyrene, 0.1 to 25% by weight of a vinyl copolymer, 0.01 to 10% by weight of an acrylic acid ester copolymer, and 0.01 to 10% by weight of an anti-segregation agent.

In the composition of the present invention, the quick-setting inorganic binder may contain 25 to 80% by weight of microcement having a powder degree of 3,500 to 7,000 cm ² / g, 1 to 45% by weight of calcium or magnesium sulfoaluminate, Wherein the porous silica fume is 0.1 to 15 wt.%, Dolomite is 0.1 to 15 wt.%, Magnesium oxide is 0.01 to 10 wt.%, Lithium silicate is 0.01 to 10 wt.%, And 0.01 to 10% by weight of zeolite.

The fast-growing inorganic binder may further contain 0.01 to 10% by weight of pigment, 0.01 to 10% by weight of retarder, 0.01 to 10% by weight of water reducing agent, .

In the composition of the present invention, the modified admixture may further include 0.01 to 10% by weight of a defoaming agent and 0.01 to 10% by weight of a fluidizing agent with respect to the modified admixture.

A concrete slab finishing method for solving the problems of the present invention is a method for finishing a concrete slab, such as laying, impurities, deteriorated portions, etc., by chipping using a grinder, a planer, a grinder, a short blaster, a water jet, Forming a primer layer by applying a primer to the surface of the primer layer to prevent penetration of dust, water, and harmful substances into the primer layer and improving the adhesion of the primer layer to the surface of the primer layer; A step of curing and curing the environmentally friendly flooring finishing composition at the upper part, and a step of applying a surface strengthening finishing agent to the upper part to improve the surface hardness, stain resistance, gloss and the like after curing.

In the method of the present invention, the primer may be at least one selected from a styrene-butadiene copolymer, a vinyl acetate-vinyl chloride copolymer, an acrylic emulsion, and ethylene vinyl acetate. The surface strengthening finish may be selected from among acrylic-urethane copolymers, acrylic emulsions, and aqueous silica sol-based inorganic coatings.

According to the eco-friendly flooring finish composition having durability and functionality of the present invention and the concrete slab finishing method using the eco-friendly flooring composition, it is possible to provide an eco-friendly flooring finishing composition having high durability and functionality and high durability, Functionality and self-leveling property can be improved. 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, it is an eco-friendly floor finish with superior far-infrared effect, light weight, heat insulation, antibacterial property, deodorization, strength and durability by using sericite.

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 to provide an eco-friendly flooring finish composition having improved fluidity, initial strength, adhesion, durability, functionality, and self-leveling property by using an environmentally friendly flooring finish composition including a quick- Provide a deadline. Here, the concrete slab refers to a slab (floor) made of concrete such as a chemical plant, a gas station, a concrete structure (such as a rooftop, an indoor or outdoor parking lot floor), and a concrete slab of a building or a civil engineering structure.

The eco-friendly flooring finishing composition of the present invention imparts self-leveling property (self-leveling) to a concrete slab and comprises 25 to 95% by weight of a fast-hard inorganic binder, 1 to 50% by weight of a fine aggregate, 0.01 to 25% 30% by weight.

The eco-friendly flooring finish composition comprises 25 to 95% by weight of a fast-hard inorganic binder, 1 to 50% by weight of a fine aggregate, 0.01 to 25% by weight of a modifying admixture and 1 to 30% by weight of water in a forced mixer or continuous mixer for 2 to 5 minutes Followed by stirring.

The fast-brittle inorganic binder of the present invention comprises 25 to 80 wt% of microcement having a powder degree of 3,500 to 7,000 cm ² / g, 1 to 45 wt% of calcium or magnesium sulfoaluminate, 1 to 30 wt% of calcium aluminate cement, 0.1 to 15 wt% of hollow silica fume, 0.1 to 15 wt% of dolomite, 0.01 to 10 wt% of magnesium oxide, 0.01 to 10 wt% of lithium silicate, and 0.01 to 10 wt% of zeolite, By weight.

Since the microcement has a powder degree of 3,500 ~ 7,000cm2 / g and the blast powder of ordinary ordinary portland cement is very fine compared with about 2,800 ~ 3,500cm2 / g, the hydration reaction of cement is quick because of contact with water. As well as the long-term strength of cement hardened bodies. The microcement is preferably contained in an amount of 25 to 80% by weight based on the fast-growing inorganic binder.

The calcium or magnesium sulfoaluminate is an inorganic hard material added to increase hydration reactivity and inhibit cracking. When contacted with water, the calcium or magnesium sulfo aluminate reacts with water in an instant to generate an ettringite hydrate, It is possible to obtain excellent compressive strength within a short time. The calcium or magnesium sulfoaluminate is preferably contained in an amount of 1 to 45% by weight based on the fast-growing inorganic binder. When the weight ratio of calcium or magnesium sulfoaluminate is increased, fast curing property is shown. If the content is more than 45% by weight, good physical properties can be obtained due to quick curing property, but it is not economical due to high production cost and less than 1 wt% The strength and the effect of suppressing crack generation are small.

The calcium aluminate cement is an inorganic quick hard mineral material used to improve early strength development. The calcium aluminate cement is preferably contained in an amount of 1 to 30% by weight based on the fast-growing inorganic binder. When the weight ratio of calcium aluminate cement is increased, rapid curing property is exhibited. When the content of calcium aluminate cement is less than 1 wt%, strength improvement effect and crack generation inhibiting effect may be insufficient, and the content of calcium aluminate cement If it exceeds 30% by weight, good physical properties can be obtained due to quick curing characteristics, but the production cost is high and it is not economical.

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 is preferably contained in an amount of 0.1 to 30% by weight based on the fast-growing 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 0.1% by weight, the performance improvement effect is deteriorated.

The gypsum is used to improve early strength development, shrinkage reduction and workability. The gypsum can use desulfurized gypsum. The gypsum is preferably contained in an amount of 0.1 to 15% by weight based on the fast-growing inorganic binder. If the content of the gypsum exceeds 15% by weight, good physical properties can be obtained due to rapid curing properties, but cracks tend to occur due to over-expansion and workability is lowered. If the content is less than 0.1% by weight, .

The hollow silica fume is used for improving pozzolanic characteristics, long-term strength development and durability. When the weight ratio of the hollow silica fume is increased, the early strength is lowered, but the long-term strength development and durability are increased. The hollow silica fume is preferably contained in an amount of 0.1 to 15% by weight based on the fast-growing inorganic binder. If the content of the hollow silica fume exceeds 15% by weight, the initial strength development is delayed. If the content is less than 0.1% by weight, the performance improvement effect is lowered.

The dolomite is used to improve strength, abrasion resistance and fire resistance. The dolomite is preferably contained in an amount of 0.1 to 15% by weight based on the fast-hardening inorganic binder. If the content of the dolomite exceeds 15% by weight, the initial strength development is delayed. If the content is less than 0.1% by weight, the performance improvement effect is deteriorated.

The magnesium oxide is used for improving reactivity, adsorptivity and fire resistance. The magnesium oxide is preferably contained in an amount of 0.01 to 10% by weight based on the fast-hardening inorganic binder. If the content of the magnesium oxide is less than 0.01% by weight, the effect of improving the performance is deteriorated. If the content of the magnesium oxide exceeds 10% by weight, the reactivity is improved and good physical properties can be obtained with early curing property, do.

The lithium silicate is used for improving surface hardening, water resistance and corrosion resistance. The lithium silicate is preferably contained in an amount of 0.01 to 10% by weight based on the fast-hardening inorganic binder. If the content of the lithium silicate exceeds 10% by weight, the performance is improved but the reactivity is promoted to lower the workability. If the content is less than 0.01% by weight, the performance improvement effect is deteriorated.

The zeolite is used to improve the viscosity and workability of the composition and to prevent the material separation phenomenon. As the weight ratio of the zeolite increases, the viscosity increases and the workability decreases. The zeolite is preferably contained in an amount of 0.01 to 10% by weight based on the fast-growing inorganic binder. If the content of the zeolite exceeds 10% by weight, the viscosity increases and the workability decreases. If the content of the zeolite is less than 0.01% by weight, the performance improvement effect decreases and the material separation phenomenon tends to occur.

The quick-hard 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-hard inorganic binder may further include 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 10% by weight based on the fast-growing 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, Or a salt thereof, a phosphonic acid or a derivative thereof, and a polyhydric alcohol such as glycerin.

The fast-growing inorganic binder may further include 0.01 to 10% 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 insufficient in improving the strength and durability as compared with the polycarboxylic acid-based water reducing agent, has a small effect of reducing the water-cement ratio, and has a disadvantage that the mixing phenomenon occurs when mixed with a modifying admixture, . 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 10% by weight based on the fast-growing inorganic binder.

The modifying admixture constituting the environmentally friendly flooring composition of the present invention improves pot life, workability, fluidity, elasticity, self-leveling property and durability. The modified admixture is preferably contained in an amount of 0.01 to 25% by weight based on the eco-friendly flooring finish composition. When the content of the modifying admixture is more than 25% by weight, the material separation is likely to occur, and the hydration reaction is delayed, leading to deterioration of the early compression strength and lowering of the price competitiveness. When the content of the modifying admixture is less than 0.01% by weight, the toughness, self-leveling performance and durability are poor.

Wherein the modifying admixture comprises 30 to 85% by weight of an ethylene-vinyl acetate copolymer, 0.1 to 30% by weight of a polycyclohexane-1,4-dimethylenterephthalate copolymer, 0.1 to 25% by weight of polymethacrylstyrene, 0.1 to 25% by weight of a vinyl copolymer, 0.01 to 10% by weight of an acrylic acid ester copolymer, and 0.01 to 10% by weight of an anti-segregation agent.

The ethylene-vinyl acetate copolymer is used to improve strength and durability. The ethylene-vinyl acetate copolymer is preferably contained in an amount of 30 to 85% by weight based on the modified admixture. If the content of the ethylene-vinyl acetate copolymer is greater than 85% by weight, the strength and durability are improved but the price competitiveness is deteriorated. If the content is less than 30% by weight, the effect of improving the strength and durability deteriorates.

The polycyclohexane-1,4-dimethylene terephthalate copolymer improves viscosity control, adhesion and durability. The polycyclohexane-1,4-dimethylene terephthalate copolymer is preferably contained in an amount of 0.1 to 30% by weight based on the modified admixture. If the content of the polycyclohexane-1,4-dimethylenterephthalate copolymer exceeds 30% by weight, the performance is improved but the viscosity is increased and the workability is lowered. If the content is less than 0.1% by weight, .

The polymethacrylstyrene is used to improve toughness, water tightness and durability. The polymethacrylstyrene is preferably contained in an amount of 0.1 to 25% by weight based on the modified admixture. When the content of the polymethacrylstyrene is more than 25% by weight, the durability is improved but the viscosity is increased and the workability is lowered. If the content is less than 0.1% by weight, the water tightness and the durability improving effect are insufficient.

The vinyl acetate-vinyl chloride copolymer has room temperature curing type, is excellent in tensile strength and stretching ability and hardens even in a wet state, and has an effect of improving durability such as flame resistance and freeze-thaw resistance. The vinyl acetate-vinyl chloride copolymer is preferably contained in an amount of 0.1 to 25% by weight based on the modified admixture. If the content of the vinyl acetate-vinyl chloride copolymer exceeds 25% 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 acrylic acid ester copolymer has improved adhesion, toughness, elasticity and durability. The acrylic acid ester copolymer is preferably contained in an amount of 0.01 to 10% by weight based on the modified admixture. If the content of the acrylic acid ester 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 starch and vinyl alcohol in a weight ratio of 1: 0.1 to 0.5. The material separation preventing agent is preferably contained in an amount of 0.01 to 10% by weight based on the modified 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 reforming admixture may further include a defoaming agent for removing pores in the reforming admixture to increase strength and durability. In addition, when the defoaming agent is added to the modifying admixture, air entraining effect can be imparted to improve workability and pot life. The defoaming agent is preferably contained in an amount of 0.01 to 10% by weight based on the modified 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.

In addition, the modifying admixture may further include a fluidizing agent for improving the strength and durability and improving the workability by reducing the water-cement ratio and improving the fluidity. The fluidizing agent can secure fluidity of the modified admixture. Self-leveling performance is improved when the fluidizing agent is added to the modifying admixture. The fluidizing agent is preferably contained in an amount of 0.01 to 10% by weight based on the modified 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).

The fine aggregate preferably comprises 65 to 99% by weight of silica silica and 0.1 to 35% by weight of elvanite.

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 65 to 99% 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. Therefore, the elvan is a porous material that adsorbs, decomposes and removes water vapor, contaminants, organic matter, and germs, and when immersed in water, the main components such as trace enzymes, iron, magnesium, calcium, and germanium are eluted, (COD) and biological oxygen demand (BOD) are lowered by increasing the oxygen supply, thereby preventing the decay of water. Especially, since it is composed of multi-elements and porous materials, ion and radiation act together, And the water does not decay. 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 35% by weight based on the fine aggregate. If the content of the elvan is less than 0.1 wt%, the adsorption action and the ion exchangeability may be deteriorated. If the content of the elvan is more than 35 wt%, good physical properties can be obtained, but the production cost becomes high and it is not economical.

The method of finishing a concrete slab according to an embodiment of the present invention is a method of finishing a concrete slab, such as laying, impurities, deteriorated portions, etc., using a grinder, a planer, a grinder, a short blaster or a waterjet, Forming a primer layer by applying a primer to the surface of the primer layer to prevent penetration of dust, water, and harmful substances into the primer layer and improving the adhesion of the primer layer to the surface of the primer layer; A step of curing and curing the environmentally friendly flooring finishing composition at the upper part, and a step of applying a surface strengthening finishing agent to the upper part to improve the surface hardness, stain resistance, gloss and the like after curing.

In the method of the present invention, the primer may be at least one selected from a styrene-butadiene copolymer, a vinyl acetate-vinyl chloride copolymer, an acrylic emulsion, and ethylene vinyl acetate. The surface strengthening finish may be selected from among acrylic-urethane copolymers, acrylic emulsions, and aqueous silica sol-based inorganic coatings.

Embodiments of the eco-friendly 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 >

55% by weight of a fast hard inorganic binder, 25% by weight of a fine aggregate, 7% by weight of a modifying admixture and 13% by weight of water were added to a forced mixer and stirred for 2 to 5 minutes to prepare an eco-friendly floor finish composition.

Wherein the fast-growing inorganic binder comprises 40 wt% of microcement, 20 wt% of calcium or magnesium sulfoaluminate, 10 wt% of calcium aluminate cement, 5 wt% of sericite, 5 wt% of magnesium oxide, 5 wt% of gypsum, 5% by weight of dolomite, 1% by weight of lithium silicate, 1% by weight of zeolite, 1% by weight of pigment, 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 modified admixture was prepared by mixing 85% by weight of ethylene-vinyl acetate copolymer, 4% by weight of polycyclohexane-1,4-dimethylenterephthalate copolymer, 3% by weight of polymethacrylstyrene, 3% by weight of vinyl acetate- , 3% by weight of an acrylic acid ester copolymer, 1% by weight of an anti-segregation agent, 0.5% by weight of a defoaming agent and 0.5% by weight of a fluidizing agent. The material separation preventing agent used was a mixture of starch and vinyl alcohol 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.

≪ Example 2 >

55% by weight of a fast hard inorganic binder, 25% by weight of a fine aggregate, 7% by weight of a modifying admixture and 13% by weight of water were added to a forced mixer and stirred for 2 to 5 minutes to prepare an eco-friendly floor finish composition.

Wherein the fast-growing inorganic binder comprises 40 wt% of microcement, 20 wt% of calcium or magnesium sulfoaluminate, 10 wt% of calcium aluminate cement, 5 wt% of sericite, 5 wt% of magnesium oxide, 5 wt% of gypsum, 5% by weight of dolomite, 1% by weight of lithium silicate, 1% by weight of zeolite, 1% by weight of pigment, 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 modified admixture was prepared by mixing 78% by weight of an ethylene-vinyl acetate copolymer, 5% by weight of a polycyclohexane-1,4-dimethylenterephthalate copolymer, 5% by weight of polymethacrylestyrene, 5% by weight of a vinyl acetate- 5% by weight of an acrylic acid ester copolymer, 1% by weight of an anti-segregation agent, 0.5% by weight of a defoaming agent and 0.5% by weight of a fluidizing agent. The material separation preventing agent used was a mixture of starch and vinyl alcohol 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.

≪ Example 3 >

55% by weight of a fast hard inorganic binder, 25% by weight of a fine aggregate, 7% by weight of a modifying admixture and 13% by weight of water were added to a forced mixer and stirred for 2 to 5 minutes to prepare an eco-friendly floor finish composition.

Wherein the fast-growing inorganic binder comprises 40 wt% of microcement, 20 wt% of calcium or magnesium sulfoaluminate, 10 wt% of calcium aluminate cement, 5 wt% of sericite, 5 wt% of magnesium oxide, 5 wt% of gypsum, 5% by weight of dolomite, 1% by weight of lithium silicate, 1% by weight of zeolite, 1% by weight of pigment, 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 modified admixture contained 74 wt% of an ethylene-vinyl acetate copolymer, 6 wt% of a polycyclohexane-1,4-dimethylene terephthalate copolymer, 6 wt% of polymethacrylestyrene, 6 wt% of a vinyl acetate- 6% by weight of an acrylic ester copolymer, 1% by weight of an anti-segregation agent, 0.5% by weight of a defoaming agent and 0.5% by weight of a fluidizing agent. The material separation preventing agent used was a mixture of starch and vinyl alcohol 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.

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, and Comparative Example 1 to be described later is a polymer cement mortar composition .

≪ Comparative Example 1 &

55% by weight of Portland cement, 25% by weight of fine aggregate, 7% by weight of ethylene-vinyl acetate copolymer and 13% by weight of water were added to a forced mixer and stirred for 2 to 5 minutes to prepare a polymer 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 >

Flow tests (degree of kneading) were carried out according to the methods defined in KS F 4041 (cement mortar horizontal mortar) of the eco-friendly flooring finish composition of Examples 1 to 3 and the cement mortar composition of Comparative Example 1. 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 changes in the flow over time.

division Flow (mm) Immediately after stirring After 30 minutes After 60 minutes Example 1 222 220 215 Example 2 227 225 221 Example 3 230 228 227 Comparative Example 1 212 205 198

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 &

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

division Compressive strength (MPa) After 1 day After 7 days After 28 days Example 1 21.5 38.2 45.8 Example 2 23.6 40.8 49.8 Example 3 28.0 45.8 53.2 Comparative Example 1 19.8 27.0 38.1

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 eco-friendly flooring compositions of Examples 1 to 3 and the cement mortar composition prepared in 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 Flexural strength (MPa) After 1 day After 7 days After 28 days Example 1 5.9 10.3 11.9 Example 2 6.5 11.5 12.7 Example 3 7.3 12.8 14.8 Comparative Example 1 4.5 8.5 10.0

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 adhesion strength of the green flooring composition of Examples 1 to 3 and the cement paste composition of Comparative Example 1 were measured by KS F 4041 (cement mortar horizontal mortar), and the results are shown in Table 4 below .

division Bond strength (MPa) After 1 day After 7 days After 28 days Example 1 1.6 2.0 2.25 Example 2 1.8 2.1 2.35 Example 3 1.9 2.3 2.45 Comparative Example 1 - 1.8 2.05

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 test was carried out according to the method described in KS F 4041 for the green flooring 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 rate of change in length was tested according to the method described in KS F 4041 for the eco-friendly flooring finish 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 (%) 0.051 0.04 0.02 0.06

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 carried out according to the method described in KS F 4041 for the green flooring finish 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 ) 0.05 0.04 0.025 0.09

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 defined in KS F 2476 for the eco-friendly flooring finish 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 (%) 0.28 0.23 0.17 0.45

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 eco-friendly 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) 0.7 0.5 0.3 0.9

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 &

Freeze-thaw resistance test was carried out according to the method described in KS F 2560 for the eco-friendly flooring 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 1 Durability index 92 95 95 89

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.

&Lt; Test Example 11 &

(DNPH method) and ISO 11890-2: 2000 (E) to compare the properties of the eco-friendly flooring composition prepared according to Examples 1 to 3 and the cement mortar composition prepared according to Comparative Example 1 The air pollutant emission test was conducted by KS F 4039, and the deodorization test was carried out by KFIA-FI-1004 (ammonia gas detection tube). Using a FT-IR spectrometer, The far infrared ray radiation characteristics were measured with the contrast value, and the results are shown in Table 11 below.

Item Example 1 Example 2 Example 3 Comparative Example 1 Pollutant emission
(mg / kg) Formaldehyde Non-detection Non-detection Non-detection Non-detection VOCs Non-detection Non-detection Non-detection Non-detection Thermal conductivity (W / mk) 0.50 0.55 0.58 0.99 Deodorization (%) 96 94 92 80 Far-infrared radiation energy
(占 10 ² W / m ²占 퐉) 3.7 3.6 3.4 -

 As shown in Table 11, the performance of the eco-friendly flooring composition prepared according to Examples 1 to 3 was significantly higher than that of the cement mortar composition prepared according to 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, but, on the contrary, Modification is possible.

Claims (6)

An eco-friendly floor finish composition for concrete slab finishing,
25 to 95% by weight of a fast-hard inorganic binder, 1 to 50% by weight of a fine aggregate, 0.01 to 25% by weight of a modifying admixture, and 1 to 30%
Wherein the modifying admixture comprises 30 to 85% by weight of an ethylene-vinyl acetate copolymer, 0.1 to 30% by weight of a polycyclohexane-1,4-dimethylenterephthalate copolymer, 0.1 to 25% by weight of polymethacrylstyrene, 0.1 to 25% by weight of a vinyl copolymer, 0.01 to 10% by weight of an acrylic acid ester copolymer and 0.01 to 10% by weight of an anti-segregation agent,
Wherein the fast-growing inorganic binder comprises 25 to 80 wt% of microcement having a powder degree of 3,500 to 7,000 cm ² / g, 1 to 45 wt% of calcium or magnesium sulfoaluminate, 1 to 30 wt% of calcium aluminate cement, By weight of zirconium, 0.01 to 10% by weight of zeolite, 0.1 to 15% by weight of gypsum, 0.1 to 15% by weight of hollow silica fume, 0.1 to 15% by weight of dolomite, 0.01 to 10% / RTI &gt;
The flow (mm) according to the method specified in KS F 4041 (cement mortar horizontal mortar) is from 222 to 230 immediately after agitation and from 215 to 227 after 60 minutes; The compressive strength (MPa) according to the method specified in KS F 4041 (cement mortar horizontal mortar) is 21.5 to 28.0 after 1 day and 45.8 to 53.2 after 28 days; Wherein the adhesive strength (MPa) by KS F 4041 (cement mortar horizontal mortar) is 1.6 to 1.9 after 1 day and 2.25 to 2.45 after 28 days.
The method according to claim 1,
Wherein the quick-setting inorganic binder further comprises 0.01 to 10% by weight of pigment, 0.01 to 10% by weight of retarder, or 0.01 to 10% by weight of water reducing agent.
The method according to claim 1,
Wherein the modified admixture further comprises 0.01 to 10% by weight of a defoaming agent or 0.01 to 10% by weight of a fluidizing agent with respect to the modified admixture.
A concrete slab finishing method using the eco-friendly flooring finishing composition according to any one of claims 1 to 3,
Chipping and removing laying, impurities or deteriorated portions of the concrete slab substrate;
Forming a primer layer by applying a primer to prevent penetration of dust, water or harmful substances on the removed base surface and improving adhesion, and strengthening the surface layer;
Curing and curing the environmentally friendly flooring composition at the top of the formed primer layer; And
After curing, a step of applying a surface strengthening finish to the top to improve the surface hardness, stain resistance, gloss, etc.
Wherein the concrete slab is a slab.
5. The method of claim 4,
Wherein the primer is at least one selected from styrene-butadiene copolymer, vinyl acetate-vinyl chloride copolymer, acrylic emulsion, and ethylene vinyl acetate.
5. The method of claim 4,
Wherein the surface reinforcing finishing agent is any one selected from the group consisting of an acrylic-urethane copolymer, an acrylic emulsion, and an aqueous silica-sol-based inorganic coating agent.