KR102546589B1 - Ultra-smooth ultra-smooth flooring composition with excellent smoothness and durability, and floor construction method using the same - Google Patents

Abstract

The present invention relates to an ultra-smooth ultra-smooth flooring composition with excellent smoothness and durability, and a floor construction method using the same and, more specifically, to an ultra-smooth ultra-smooth flooring composition with excellent smoothness and durability, and a floor construction method using the same. The ultra-smooth ultra-smooth flooring composition comprises: 40 to 60 wt% of fine aggregate; 20 to 45 wt% of a functional binder; and 1 to 30 wt% of a functional admixture. The functional binder includes: 100 parts by weight of Hauyne clinker fine powder; 20 to 40 parts by weight of type 1 ordinary Portland cement; 10 to 30 parts by weight of calcium sulfoaluminate; 5 to 20 parts by weight of anhydrous gypsum; 1 to 10 parts by weight of an anti-gelling agent; and 0.1 to 10 parts by weight of a polycarboxylic acid-based water reducing agent. The functional admixture includes: 100 parts by weight of a vinyl acetate-ethylene (VAE) copolymer containing cellulose nanofibers; 1 to 5 parts by weight of calcium carbonate surface-treated with wax having an ester bond; 1 to 5 parts by weight of a carbon nanotube-elastomer crosslinked product; 0.1 to 10 parts by weight of spermine; 10 parts by weight of steviol glycoside; and 1 to 5 parts by weight of thiodiphosphate. Therefore, the composition can have a short curing time, thereby improving construction periods and workability, can have the increased ratio of bending strength to tensile strength to secure ductility, thereby improving smoothness, and can improve crack resistance due to drying shrinkage and significantly improve durability such as adhesion strength and abrasion resistance, thereby reducing the cost required to extend service life and for maintenance.

Description

Ultra-smooth ultra-smooth flooring composition with excellent smoothness and durability, and floor construction method using the same

The present invention provides an ultra-fast, ultra-flat flooring composition with excellent smoothness and durability for free operation of a heavy forklift by improving durability, abrasion resistance, and crack resistance, as well as ensuring sufficient flatness by improving fluidity and short curing time, and floor construction using the same It is to provide a way.

A warehouse (or storage warehouse) is a storage warehouse for temporary or long-term storage of all items used in daily life, such as various types of food, beverages, clothing, home appliances, and miscellaneous goods produced in large quantities at factories or production sites. Due to the recent rapid development of the logistics industry, new businesses such as efficient warehousing and shipping and inventory management are created from the arrangement of products stored in the warehouse beyond simple logistics management. These are being designed and constructed to store large quantities of logistics through more efficient use of logistics loading space as well as faster arrival and departure of mass-produced items.

The design and operation of such a warehouse is generally designed vertically in multiple stages by dividing pallet racks having a width and height that allow pallets of a certain standard to be deposited and deposited into each aisle section. Through the passage section, the pallet in which the logistics are loaded through the forklift, auto crane, or forklift is filled and stored in the pallet rack, and is operated in a one-room, one-pallet method. In addition, when the loaded logistics is to be departed, the pallet loaded with the logistics is moved to the ground or a transport vehicle through a forklift, an auto crane, or a forklift.

When designing such a warehouse, the most important factor in floor construction is to accurately match the flatness (level) of the floor. In particular, if the flatness of the floor of the warehouse is not accurately set, when loading or taking out pallets loaded with products on pallet racks through forklifts, auto cranes, or forklifts, Accuracy of flatness is more important than anything else in the construction of the floor of a distribution warehouse, including problems such as a large error in the work position between the loading position and the work equipment, making it impossible to load and unload products.

Current industrial floor finishing technologies include a method of coating epoxy on the slab surface after concrete pouring/finishing, a method of pouring concrete based on the height of the H-beam, and a method of polishing with a diamond grinder after curing the concrete matrix. However, the above methods have problems in that precise construction cannot be guaranteed due to lack of horizontal precision due to unfamiliar smoothness, errors, etc., or the economic feasibility of the work is low.

Therefore, there is a demand for an economical construction method capable of reducing construction costs while sufficiently meeting the needs of consumers by sufficiently considering the robustness, cleanliness, and economic feasibility of the floor surface.

Republic of Korea Patent No. 10-1790732 Republic of Korea Patent No. 10-2182536

The present invention has been made to solve the above-mentioned problems, and one embodiment of the present invention uses a specific polymer as a functional admixture to shorten the curing time and improve fluidity to secure sufficient flatness and at the same time durability, wear resistance and crack resistance. It is an object of the present invention to provide an ultra-fast, ultra-flat flooring composition with excellent smoothness and durability for free operation of a heavy forklift by improving resistance, and a floor construction method using the same.

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

One embodiment of the present invention includes 40 to 60% by weight of fine aggregate, 20 to 45% by weight of functional binder, and 1 to 30% by weight of functional admixture, and the functional binder is 100 parts by weight of Irwin-based clinker fine powder, 1 type normal Portland cement 20 to 40 parts by weight, 10 to 30 parts by weight of calcium sulfoaluminate, 5 to 20 parts by weight of anhydrite, 1 to 10 parts by weight of an antigelling agent, and 0.1 to 10 parts by weight of a polycarboxylic acid-based water reducing agent, and the functional admixture is cellulose. 100 parts by weight of vinyl acetate-ethylene (VAE) copolymer containing nanofibers, 1 to 5 parts by weight of calcium carbonate surface-treated with wax having an ester bond, 1 to 5 parts by weight of carbon nanotube-elastomer crosslinked product, An ultra-fast, ultra-smooth flooring composition containing 0.1 to 10 parts by weight of min, 0.1 to 10 parts by weight of steviol glycoside, and 1 to 5 parts by weight of thiodiphosphate is provided.

The calcium carbonate surface-treated with the wax having an ester bond is mixed with 100 parts by weight of spherical calcium carbonate and 1 to 50 parts by weight of a solid wax having an ester bond having a melting point of 40 ° C or higher, and the mixed mixture is heated at 70 to 90 ° C. After stirring, it may be prepared by cooling to room temperature and grinding.

preparing surface-modified carbon nanotubes by plasma-treating the carbon nanotube-elastomer crosslinked carbon nanotubes in an environment of a nitrogen-containing compound other than nitrogen gas; Preparing a tetrafluorinated ethylene-perfluoroalkyl vinyl ether rubber (FFKM) solution; preparing a dispersion by dispersing 0.1 to 10 parts by weight of the prepared surface-modified carbon nanotubes in 100 parts by weight (solid basis) of a tetrafluorinated ethylene-perfluoroalkyl vinyl ether rubber (FFKM) solution; removing the solvent from the dispersion, drying it, mixing and kneading a crosslinking agent; and heating the kneaded material to prepare a carbon nanotube-elastomer crosslinked product.

The cellulose nanofiber-containing vinyl acetate-ethylene (VAE) copolymer is prepared by preparing a base resin by heating and melting 100 parts by weight of vinyl acetate-ethylene resin and 5 to 10 parts by weight of vegetable oil at 120 to 160 ° C. It is prepared by mixing and kneading 0.1 to 1 part by weight of cellulose nanofibers having a length of 200 nm to 2000 nm and an average diameter of 3 nm to 10 nm with respect to 100 parts by weight of the vinyl acetate-ethylene resin. can

The prepared base resin further includes 0.1 to 5 parts by weight of a fluorosulfonylimide salt; The fluorosulfonylimide salt is a combination of lithium bis(fluorosulfonyl)imide represented by Formula 1 and ammonium bis(fluorosulfonyl)imide (NH ₄ FSI) represented by Formula 2 below: It may be mixed in a weight ratio of 0.5 to 1.

[Formula 1]

[Formula 2]

In addition, another embodiment of the present invention is a construction surface cleaning step of cleaning the construction surface of the floor to be constructed; A primer application step of uniformly applying a primer on the construction surface after the construction surface preparation step is finished; A stirring step of uniformly mixing by stirring the ultra-high speed and ultra-flat flooring composition having excellent smoothness and durability; and a flooring application step of uniformly applying the agitated ultra-fast and ultra-flat flooring composition having excellent smoothness and durability on a primer-coated surface.

According to the ultra-fast, ultra-flat flooring composition having excellent smoothness and durability and the floor construction method using the same according to an embodiment of the present invention, the curing time is short, the construction period and workability can be improved, and the ratio of flexural strength to tensile strength is reduced. Since ductility can be secured by increasing, smoothness can be improved. In addition, crack resistance due to drying shrinkage can be improved, and durability such as adhesion strength and abrasion resistance can be greatly improved, thereby extending the service period and reducing maintenance costs.

As described above, the ultra-fast and ultra-flat flooring composition with excellent smoothness and durability of the present invention realizes a floor with high-quality flatness to secure operational efficiency of commercial equipment, increase worker work efficiency, reduce forklift collision accidents, and reduce driver's It can bring about effects such as reduction of fatigue and reduction of maintenance cost of used equipment.

1 is a SEM photograph of an ultra-fast, ultra-flat flooring composition having excellent smoothness and durability of Example 1 according to the present invention and a flooring composition of Comparative Example 1.

Hereinafter, embodiments of the present invention will be described in detail. However, this is presented as an example, and the present invention is not limited thereby, and the present invention is only defined by the scope of the claims to be described later.

One embodiment of the present invention includes 40 to 60% by weight of fine aggregate, 20 to 45% by weight of functional binder, and 1 to 30% by weight of functional admixture, and the functional binder is 100 parts by weight of Irwin-based clinker fine powder, 1 type normal Portland cement 20 to 40 parts by weight, 10 to 30 parts by weight of calcium sulfoaluminate, 5 to 20 parts by weight of anhydrite, 1 to 10 parts by weight of an antigelling agent, and 0.1 to 10 parts by weight of a polycarboxylic acid-based water reducing agent, and the functional admixture is cellulose. 100 parts by weight of vinyl acetate-ethylene (VAE) copolymer containing nanofibers, 1 to 5 parts by weight of calcium carbonate surface-treated with wax having an ester bond, 1 to 5 parts by weight of carbon nanotube-elastomer crosslinked product, It provides an ultra-fast and ultra-smooth flooring composition comprising 0.1 to 10 parts by weight of min, 0.1 to 10 parts by weight of steviol glycoside, and 1 to 5 parts by weight of thiodiphosphate.

According to the ultra-fast, ultra-flat flooring composition having excellent smoothness and durability and the floor construction method using the same according to one embodiment of the present invention, the curing time is short, and the construction period and workability can be improved, and the flexural strength / tensile strength Since ductility can be secured by increasing the ratio, smoothness can be improved. In addition, crack resistance due to drying shrinkage can be improved, and durability such as adhesion strength and abrasion resistance can be greatly improved, thereby extending the service period and reducing maintenance costs. As described above, the ultra-fast and ultra-flat flooring composition with excellent smoothness and durability of the present invention realizes a floor with high-quality flatness to secure operational efficiency of commercial equipment, increase worker work efficiency, reduce forklift collision accidents, and reduce driver's It can bring about effects such as reduction of fatigue and reduction of maintenance cost of used equipment.

An ultra-fast, ultra-flat flooring composition having excellent smoothness and durability according to an embodiment of the present invention includes 40 to 60% by weight of fine aggregate, 20 to 45% by weight of a functional binder, and 1 to 30% by weight of a functional admixture.

The aggregate used in the present invention is fine aggregate having a particle diameter of 5 mm or less. The fine aggregate is preferably contained in an amount of 40 to 60% by weight relative to the super-fast-hard ultra-flat flooring composition having excellent smoothness.

The functional binder used in the present invention is preferably contained in an amount of 20 to 45% by weight relative to the super-fast-hardening ultra-flat flooring composition of the present invention having excellent smoothness and durability. If the content of the functional binder is too small, the possibility of insufficient viscosity and bleeding may increase, and accordingly, the possibility of occurrence of plastic cracks may also increase. In addition, the water permeability resistance may decrease due to the decrease in strength and watertightness of concrete. In addition, when the content of the functional improving binder is too large, viscosity increases, workability decreases, pot life control becomes difficult, initial strength decreases, and long-term strength continuously increases due to excessive increase in watertightness, resulting in concrete structures and pavement Drying shrinkage cracking of the sieve may occur.

The functional binder is 100 parts by weight of Irwin-based clinker fine powder, 20 to 40 parts by weight of one type ordinary Portland cement, 10 to 30 parts by weight of calcium sulfoaluminate, 5 to 20 parts by weight of anhydrite, 1 to 10 parts by weight of an antigelling agent, and poly 0.1 to 10 parts by weight of a carboxylic acid-based water reducing agent may be included. Considering the characteristics such as curing time and initial strength, these functional binders have 11% by weight or more of _Al2O3 , 13% by weight or more of SO ₃ , 2.5 < CaO / SO ₃ < 4, 0.5 It is preferable to have a chemical composition of < Al ₂ O ₃ /SO ₃ < 1.

The Irwin-based clinker fine powder plays a role in developing the strength at the beginning of hydration, such as the bonding strength of ettringite hydrate produced by the reaction of calcium hydroxide and calcium sulfate eluted from one type of ordinary Portland cement.

It is preferable to use the first type of ordinary Portland cement specified in KS, and it is preferable to use one having a fineness of 4,500 to 9,000 cm 2 / g. The first type of ordinary Portland cement is preferably contained in the range of 20 to 40 parts by weight based on 100 parts by weight of the Irwin-based clinker fine powder. If the content of the 1-type normal Portland cement is too small, the amount of ettringite production may decrease, making it difficult to develop sufficient strength at an early stage. Doing so may hinder the development of strength.

The calcium sulfo aluminate provides fast curing characteristics and functions to exhibit super fast hardening. The calcium sulfo aluminate is preferably contained in an amount of 10 to 30 parts by weight based on 100 parts by weight of the arwin-based clinker fine powder. If the content of the calcium sulfoaluminate is too small, there is a problem that the improvement effect may be weak, and if the content of the calcium sulfoaluminate is too large, the curing speed is too fast, resulting in reduced workability or increased manufacturing cost. There is a problem that may lower price competitiveness.

The anhydrite increases the initial hydration reaction rate, expresses initial strength, and functions to prevent cracking of concrete and shrinkage of concrete by making the structure of hydrated minerals dense. The anhydrite may be used by selecting one or more types from natural anhydrite or chemical anhydrite.

The anhydrite is preferably contained in an amount of 5 to 20 parts by weight based on 100 parts by weight of the arwin-based clinker fine powder. If the content of the anhydrite is too small, there is a problem that the above improvement effect may be weak, and if the content of the anhydrite is too large, the curing speed is too fast, resulting in reduced workability, overexpansion or reduced water resistance. There are possible problems.

The antigelling agent serves to improve the maintenance of the initial working time and workability. Considering this function, the antigelling agent is preferably contained in the range of 1 to 10 parts by weight based on 100 parts by weight of the arwin-based clinker fine powder.

In addition, the antigelling agent is generally used in the art, for example, sugars such as glucose, glucose, dextran, and dextran, acids such as gluconic acid, tartaric acid, malic acid, citric acid, citric acid, and boric acid or salts thereof, aminocarboxylic acids or salts thereof, phosphonic acids or derivatives thereof, polyvinyl alcohol, polyhydric alcohols such as glycerin, and the like may be used. In the present invention, it is more preferable to use a mixture of tartaric acid and citric acid.

The polycarboxylic acid-based water reducing agent generally includes a polycarboxylic acid-based water reducing agent used for mortar and concrete, a polycarboxylic acid-based AE water reducing agent, a polycarboxylic acid-based high-performance AE water reducing agent, and a polycarboxylic acid-based high-performance water reducing agent. Among them, a polycarboxylic acid-based high-performance AE water-reducing agent or a polycarboxylic acid-based high-performance water-reducing agent is preferable. Examples include the Master Granium Series manufactured by BASF and the Chu-Paul Series manufactured by Yuji Takemoto. Either liquid form or powder form can be used. The blending amount of the polycarboxylic acid-based water reducing agent is preferably 0.1 to 10 parts by weight based on 100 parts by weight of the Irwin-based clinker fine powder from the viewpoint of ensuring fluidity and pot life.

In addition, the functional binder may further include at least one selected from the group consisting of a hardening accelerator, a material separation preventing agent, and a mixture thereof as an additive commonly used in the art.

More specifically, the curing accelerator functions to further activate the hydration reaction of the composition to express compressive strength at an early stage. Considering this function, the curing accelerator is preferably contained in the range of 0.01 to 5 parts by weight based on 100 parts by weight of the arwin-based clinker fine powder.

In addition, the curing accelerator is commonly used in the art, for example, calcium salts such as calcium formate, calcium chloride and calcium nitrate, chlorides such as magnesium chloride, sulfates such as magnesium sulfate and aluminum sulfate, potassium hydroxide and sodium hydroxide. , carbonates such as sodium carbonate, formic acid or salts thereof, lithium carbonate, and the like can be used.

The material separation preventing agent functions to prevent material separation of the composition and improve workability. The material separation preventing agent is preferably contained in the range of 0.01 to 5 parts by weight based on 100 parts by weight of the Irwin-based clinker fine powder.

In addition, the material separation preventing agent is generally used in the art, and for example, methylcellulose, starch, gum, and the like can be used. More preferably, it is good to use a starch-based material separation preventing agent with less strength loss.

On the other hand, the function-improving admixture functions to improve the curing time, workability, strength, flatness and durability of the ultra-fast-hardening ultra-flat flooring composition having excellent smoothness and durability of the present invention.

The functional admixture is preferably contained in an amount of 1 to 30% by weight in the ultra-fast and ultra-flat flooring composition having excellent smoothness and durability of the present invention. If the content of the function-improving admixture is too small, the improvement effect may be insignificant, and if the content of the function-improving admixture is too large, the viscosity may be lowered and workability may be improved. Or, there is a problem that the manufacturing cost may be increased and price competitiveness may be lowered.

The functional admixture is 100 parts by weight of cellulose nanofiber-containing vinyl acetate-ethylene (VAE) copolymer, 1 to 5 parts by weight of calcium carbonate surface-treated with wax having an ester bond, 1 to 5 parts by weight of carbon nanotube-elastomer crosslinked product parts by weight, 0.1 to 10 parts by weight of spermine, 0.1 to 10 parts by weight of steviol glycoside, and 1 to 5 parts by weight of thiodiphosphate may be used.

The vinyl acetate-ethylene (VAE) copolymer containing the cellulose nanofibers functions to improve strength properties such as flexural strength and tensile strength, crack resistance, and to adjust the curing time.

The cellulose nanofiber-containing vinyl acetate-ethylene (VAE) copolymer is prepared by preparing a base resin by heating and melting 100 parts by weight of vinyl acetate-ethylene resin and 5 to 10 parts by weight of vegetable oil at 120 to 160 ° C. prepared by mixing and kneading 0.1 to 1 part by weight of cellulose nanofibers having a length of 200 nm to 2000 nm and an average diameter of 3 nm to 10 nm with respect to 100 parts by weight of the vinyl acetate-ethylene resin. it is desirable

The vegetable oil is used for viscosity control and resin odor removal, and preferably has a melting point of 100 °C or less. Specifically, linseed oil, darman resin, cypress oil, safflower oil, tung oil, carnauba wax, sugar cane wax, palm wax, candelilla wax, jojoba oil, soybean oil, camellia oil, and the like may be used.

In addition, the prepared base resin may further include 0.1 to 5 parts by weight of a fluorosulfonylimide salt in order to improve compatibility with cellulose nanofibers and control of curing time. The fluorosulfonylimide salt is a combination of lithium bis(fluorosulfonyl)imide represented by Formula 1 and ammonium bis(fluorosulfonyl)imide (NH ₄ FSI) represented by Formula 2 below: It may be mixed in a weight ratio of 0.5 to 1.

[Formula 1]

[Formula 2]

The cellulose nanofibers are used to improve adhesion strength while improving strength such as bending and tensile. It is desirable to maintain a specific length and average length in order to express these characteristics. The cellulose nanofibers preferably contain 0.1 to 1 part by weight based on 100 parts by weight of the vinyl acetate-ethylene resin. If the content exceeds 1 part by weight, economic feasibility may be reduced.

Calcium carbonate surface-treated with wax having an ester bond is used to enhance flexural strength and tensile strength and reduce surface cracks during curing, is effective for initial construction stability after construction, and serves to increase initial dispersibility.

The calcium carbonate surface-treated with the wax having an ester bond is mixed with 100 parts by weight of spherical calcium carbonate and 1 to 50 parts by weight of a solid wax having an ester bond having a melting point of 40 ° C or higher, and the mixed mixture is heated at 70 to 90 ° C. After stirring, it can be used that is prepared by cooling to room temperature and pulverizing.

The solid wax having an ester bond having a melting point of 40° C. or higher may be one commonly used in the art. At this time, if the temperature is less than 40 ° C, the wax is solidified or the surface reaction with the calcium carbonate does not occur, so it is preferably 40 ° C or higher.

Specifically, various hydrogenated oils, beef tallow, pork fat, triacylglycerol such as lacquer wax, hydrogenated jojoba oil, carnauba wax, candellia wax, sugarcane wax, beeswax, γ-olizanol, sorbitan fatty acid esters , sucrose fatty acid ester, polyethylene glycol fatty acid ester, polyoxyethylene hydrogenated castor oil, Nikko Chemicals' NIKKOL MM (myristyl myristate), NIKKOL N-SPV (cetyl palmitate), and the like. You may use these waxes 1 type or in mixture of 2 or more types.

Preferably, 1 to 5 parts by weight of the calcium carbonate surface-treated with wax having the ester bond is contained based on 100 parts by weight of the cellulose nanofiber-containing vinyl acetate-ethylene (VAE) copolymer. If the content of calcium carbonate surface-treated with wax having an ester bond is less than 1 part by weight, the effect of improving tensile strength and flexural strength is insignificant, and if it exceeds 5 parts by weight, workability and economy may deteriorate.

The carbon nanotube-elastomer crosslinked product serves to improve bending, tensile and adhesive strength, and to improve excellent miscibility and durability.

preparing surface-modified carbon nanotubes by plasma-treating the carbon nanotube-elastomer crosslinked carbon nanotubes in an environment of a nitrogen-containing compound other than nitrogen gas; Preparing a tetrafluorinated ethylene-perfluoroalkyl vinyl ether rubber (FFKM) solution; preparing a dispersion by dispersing 0.1 to 10 parts by weight of the prepared surface-modified carbon nanotubes in 100 parts by weight (solid basis) of a tetrafluorinated ethylene-perfluoroalkyl vinyl ether rubber (FFKM) solution; removing the solvent from the dispersion, drying it, mixing and kneading a crosslinking agent; and preparing a carbon nanotube-elastomer crosslinked product by heating the kneaded material.

The plasma treatment of the carbon nanotubes is performed by disposing the carbon nanotubes to be surface treated in a treatment container containing a nitrogen-containing compound other than nitrogen gas such as ammonia or an amino-containing organic compound (ethylenediamine), and applying the plasma to the plasma generated by the glow discharge. This can be done by exposing carbon nanotubes. In addition, as a discharge form of plasma generation, (1) direct current and low-frequency discharge, (2) radio frequency discharge, (3) microwave discharge, etc. can be used.

The plasma treatment conditions are not particularly limited, and specifically, the energy output per unit area of the plasma irradiation surface is 0.05 to 2.0 W / cm 2, the gas pressure is 5 to 150 Pa, and the treatment time is 10 to 400 minutes. it is desirable At this time, it is preferable that the carbon nanotubes are agitated using a rotatable drum as the treatment container.

The crosslinking agent is not particularly limited, but a crosslinking agent capable of crosslinking the fluorine-containing elastomer is used. As such a crosslinking agent, for example, at least one selected from the group consisting of a peroxide-based crosslinking agent, a bisphenol-based crosslinking agent, a diamine-based crosslinking agent, a triazine-based crosslinking agent, an oxazole-based crosslinking agent, an imidazole-based crosslinking agent, and a thiazole-based crosslinking agent may be used. In addition, the content of the crosslinking agent is not particularly limited, and may be used in an amount generally used in the art.

In addition, the carbon nanotube-elastomer crosslinked product is a dispersant, antioxidant, heat stabilizer, light stabilizer, ultraviolet absorber, pigment, colorant, foaming agent, antistatic agent, flame retardant, lubricant, softener, tackifier, plasticizer, release agent, deodorant, It may further contain additives generally used in the art, such as perfume. Specifically, the additive may include carbon black, silica, talc, barium sulfate, calcium carbonate, clay, magnesium oxide, calcium hydroxide, and the like. The additive is preferably contained in an amount of 5 to 40 parts by weight based on 100 parts by weight (based on solid matter) of the tetrafluorinated ethylene-perfluoroalkyl vinyl ether rubber (FFKM) solution.

The carbon nanotube-elastomer crosslinked product is preferably contained in an amount of 1 to 5 parts by weight based on 100 parts by weight of the cellulose nanofiber-containing vinyl acetate-ethylene (VAE) copolymer. If the content of the carbon nanotube-elastomer crosslinked product is less than 1 part by weight, there is a problem that the improvement effect may be reduced, and if the content of the carbon nanotube-elastomer crosslinked product exceeds 5 parts by weight, the initial strength expression is delayed. Or, the above-described improvement effect is not improved anymore, and there is a problem that price competitiveness may be lowered.

The spermine functions to provide excellent workability and excellent miscibility between materials. The spermine is preferably contained in the range of 0.1 to 10 parts by weight based on 100 parts by weight of the vinyl acetate-ethylene (VAE) copolymer containing the cellulose nanofibers. If the content of the spermine is too small, there is a problem that the above improvement effect may be insufficient, and if the content of the spermine is too large, there is a problem that the expression of initial strength may be delayed or price competitiveness may be lowered.

The steviol glycoside functions to further improve surface peeling resistance, workability and durability. The steviol glycoside is preferably contained in an amount of 0.1 to 10 parts by weight based on 100 parts by weight of the cellulose nanofiber-containing vinyl acetate-ethylene (VAE) copolymer. If the content of the steviol glycoside is too small, there is a problem that the above improvement effect may be insufficient, and if the content of the steviol glycoside is too large, there is a problem that price competitiveness may be lowered.

The thiodiphosphate serves to improve physical properties such as fast curing speed and strength. The thiodiphosphate is preferably contained in an amount of 1 to 5 parts by weight based on 100 parts by weight of the cellulose nanofiber-containing vinyl acetate-ethylene (VAE) copolymer. If the content of the thiodiphosphate is too small, there is a problem that the above-described improvement effect may be weak, and if the content of the thiodiphosphate is too large, workability may be deteriorated or manufacturing cost may be increased, which may reduce price competitiveness. There is a problem.

In addition, another embodiment of the present invention is characterized by a floor construction method using the ultra-fast and ultra-flat flooring composition having excellent smoothness and durability. The construction method includes a construction surface cleaning step of cleaning the construction surface of the floor to be concretely constructed; A primer application step of uniformly applying a primer on the construction surface after the construction surface preparation step is finished; Stirring step of uniformly mixing by stirring the super-fast and ultra-flat flooring composition having excellent smoothness and durability according to the present invention; and uniformly applying the agitated super-fast and ultra-flat flooring composition having excellent smoothness and durability on the primer-coated surface.

The construction surface cleaning step includes performing mechanical cleaning using equipment such as an abrasive or grinding machine to remove the cement laitance of the floor and clean the surface. In addition, the primer in the primer application step protects the floor surface from physical impact applied to the floor surface and is first coated on the floor surface to ensure smooth subsequent painting. For this purpose, it is commonly used in the art The primer to be used is not particularly limited, but it is preferable to use a resin-based primer.

At this time, the flatness of the surface can be evaluated based on the smoothness management standard UK The Concrete Society's TR34 (4th Edition) in Tables 1 and 2 below, and it is preferable to have a smoothness satisfying FM2 or FM1 based on the above criteria. The surface constructed using the ultra-fast and ultra-flat flooring composition having excellent smoothness and durability according to the present invention satisfies E of 6.5 to 8.0 mm and F of 2.0 to 2.2 mm to have an FM2 grade or E of 4.5 to 6.5 mm, F satisfies 1.8 to 2.0 mm to have an FM1 grade.

Rating Acceptable use Section I (mm) Section Ⅱ (mm) 95% 100% 95% 100% FM 1 A grade that requires a very high standard floor specification, must be cast in long strip method 2.5 4.0 4.5 7.0 FM 2 Logistics warehouse using racks over 8m and wide forklift aisles 3.5 5.5 8.0 12.0 FM 3 Logistics warehouses and factories using racks of less than 8m and wide forklift aisles 5.0 7.5 10.0 15.0

Rating allowable lift height Section I Section Ⅱ Section III wheel spacing
up to 1.5 wheel spacing
1.5 or higher 95% 100% 95% 100% 95% 100% 95% 100% super flat over 13m 0.75 1.0 1.0 1.5 1.5 2.5 2.0 3.0 Category 8~13m 1.5 2.5 2.5 3.5 2.5 3.5 3.0 4.5 Category up to 8m 2.5 4.0 3.25 5.0 3.5 5.0 4.0 6.0

According to the ultra-fast, ultra-flat flooring composition having excellent smoothness and durability and the floor construction method using the same according to an embodiment of the present invention, the curing time is short, the construction period and workability can be improved, and the ratio of flexural strength to tensile strength is reduced. Since ductility can be secured by increasing, smoothness can be improved. In addition, crack resistance due to drying shrinkage can be improved, and durability such as adhesion strength and abrasion resistance can be greatly improved, thereby extending the service period and reducing maintenance costs. As described above, the ultra-fast and ultra-flat flooring composition with excellent smoothness and durability of the present invention realizes a floor with high-quality flatness to secure operational efficiency of commercial equipment, increase worker work efficiency, reduce forklift collision accidents, and reduce driver's It can bring about effects such as reduction of fatigue and reduction of maintenance cost of used equipment.

Although the preferred embodiment of the present invention has been described in detail above, the present invention is not limited to the above embodiment, and various modifications are made by those skilled in the art within the scope of the technical idea of the present invention. this is possible

<Production Example 1>

Vinyl Acetate-Ethylene (VAE) Copolymer with Cellulose Nanofibers

A base resin was prepared by heating and melting 100 parts by weight of vinyl acetate-ethylene resin, 2 parts by weight of palm oil and 3 parts by weight of camellia oil at 140 °C. To the prepared base resin, 0.5 parts by weight of bamboo cellulose nanofibers having a length of 900 nm and an average diameter of 5 nm are mixed and kneaded with respect to 100 parts by weight of vinyl acetate-ethylene resin, and vinyl acetate-ethylene containing cellulose nanofibers is mixed. (VAE) copolymers were prepared.

<Production Example 2>

Vinyl Acetate-Ethylene (VAE) Copolymer with Cellulose Nanofibers

It was carried out in the same manner as in Preparation Example 1, but coniferous cellulose nanofibers were used instead of bamboo cellulose nanofibers, and 100 parts by weight of vinyl acetate-ethylene resin, 2 parts by weight of palm oil, 3 parts by weight of camellia oil and fluorosulfonyl A vinyl acetate-ethylene (VAE) copolymer containing cellulose nanofibers was prepared using 1 part by weight of mead salt. In this case, the fluorosulfonylimide salt is a weight ratio of 1 lithium bis(fluorosulfonyl)imide of Formula 1 and 0.6 ammonium bis(fluorosulfonyl)imide (NH ₄ FSI) represented by Formula 2 Mixed weight ratios were used.

<Comparative Preparation Example 1>

Methyl methacrylate resin containing cellulose nanofibers

It was carried out in the same manner as in Preparation Example 1, but using methyl methacrylate resin instead of vinyl acetate-ethylene resin to prepare a methyl methacrylate resin containing cellulose nanofibers.

<Production Example 3>

Calcium carbonate surface-treated with wax having ester bonds

Put 970 g of spherical calcium carbonate (NL-QC10, manufactured by New Lime) in a Henschel mixer, add 30 g of sucrose fatty acid ester (sucrose polystearate, sugar wax S-10E, manufactured by Daiichi Kogyo Pharmaceutical), and stir at 80 ° C for 30 minutes. did. Thereafter, while stirring, the mixture was slowly cooled to room temperature and passed through an 80 mesh screen to prepare calcium carbonate surface-treated with wax having an ester bond.

<Production Example 4>

Calcium carbonate surface-treated with wax having ester bonds

Calcium carbonate surface-treated with wax having an ester bond was prepared in the same manner as in Preparation Example 3, except that NIKKOL MM (myristyl myristate) of Esternikko Chemicals was used instead of sucrose fatty acid.

<Comparative Preparation Example 2>

Calcium carbonate surface treated with wax having ether bonds

Carried out in the same manner as in Preparation Example 3, but surface treatment with wax using methyl perfluorobutyl ether instead of sucrose fatty acid ester (polystearic acid sucrose, sugar wax S-10E, manufactured by Daiichi Kogyo Pharmaceutical) prepared calcium carbonate.

<Production Example 5>

Carbon nanotube-elastomer cross-linked product

Using a vacuum plasma device (manufactured by Suneon Semiconductor Co., Ltd., product name 'YHS-DφS'), treatment was performed for 6 hours under conditions of pressure of 40 Pa, power of 200 W (energy output per unit area: 1.28 W/cm2), rotation speed of 5 rpm, and ammonia gas introduction. (ammonia plasma treatment) to prepare surface-modified carbon nanotubes.

Next, 100 g of tetrafluorinated ethylene-perfluoroalkyl vinyl ether rubber (product name 'Aflas PM-1100', manufactured by AGC) was added to 1899 g of solvent (Noveck (registered trademark) 7300 manufactured by M), followed by 20 After stirring at °C for 12 hours, a solution of tetrafluorinated ethylene-perfluoroalkyl vinyl ether rubber was prepared.

Next, 2 g of the prepared surface-modified carbon nanotube was added to the prepared tetrafluorinated ethylene-perfluoroalkyl vinyl ether rubber solution and stirred at 20 °C for 30 minutes. After that, a dispersion was prepared by dispersing at 40 ° C using a bead mill.

Next, the dispersion was coagulated with methyl ethyl ketone (MEK) to obtain a black coagulum, which was dried under reduced pressure at 120 ° C. for 12 hours to prepare a dried product. Thereafter, 102 parts by weight of the dried material, 3 parts by weight of a triallyl isocyanurate crosslinking agent, and 2 parts by weight of 2,5-dimethyl-2,5-di(t-butylperoxy)hexane were kneaded to form a carbon nanotube-elastomer crosslinked product. was manufactured.

<Examples 1 to 3 and Comparative Examples 1 to 3>

Fine aggregates and functionally improved binders mixed with the ingredients and contents shown in Table 1 below were put into a forced mixing mixer, mixed for 3 minutes under dry mixing conditions, and mixed with the ingredients and contents shown in Table 3 below. A functional improvement admixture and water were simultaneously added and mixed for 2 minutes to prepare an ultra-fast and ultra-flat flooring composition having excellent smoothness and durability and a flooring composition for comparison.

division
(weight%) Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 fine aggregate 50 50 50 50 50 50 functional binder 35 35 35 35 35 35 (parts by weight) Irwin-based clinker fine powder 100 100 100 100 100 100 Class 1 Normal Portland Cement 30 30 30 30 30 30 calcium sulfoaluminate 20 20 20 20 20 20 anhydrite 10 10 10 10 10 10 antigelling agent 6 6 6 6 6 6 Polycarboxylic acid water reducing agent 3 3 3 3 3 3 functional admixture 15 15 15 15 15 15 (parts by weight) Vinyl Acetate-Ethylene (VAE) Copolymer with Cellulose Nanofibers Preparation Example 1
(100) Preparation Example 2
(100) Preparation Example 1
(100) - Comparative Preparation Example 1
(100) - Vinyl Acetate-Ethylene (VAE) Copolymer - - - 100 - 100 Calcium carbonate surface-treated with wax having ester bonds Preparation Example 3 (3) Preparation Example 3 (3) Preparation Example 4 (3) - - Comparative Preparation Example 2 (3) calcium carbonate - - - 3 3 - Carbon nanotube-elastomer cross-linked product Preparation Example 5 (2) Preparation Example 5 (2) Preparation Example 5 (2) - - - spermine One One One - - - steviol glycoside One One One - - - Thiodiphosphate 1.5 1.5 1.5 - - - water 25% 25% 25% 25% 25% 25% 1. Set retardant: A mixture of 50% by weight of tartaric acid and 50% by weight of citric acid
2. Water content: water / (fine aggregate + functional binder + functional admixture) × 100

The following test examples are examples 1 to 3 according to the present invention to more easily understand the characteristics of the ultra-flat flooring composition with excellent smoothness and durability of Examples 1 to 3 according to the present invention described above Experimental results comparing the characteristics of Comparative Examples 1 to 3 are shown.

Test Items Test Methods Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Bending strength (MPa)_ 4 hours KS L ISO 679 3.09 2.63 2.87 2.47 2.51 2.39 Bending strength (MPa)_ 1 day 4.86 3.98 4.10 3.60 3.57 3.62 Flexural strength (MPa)_ 28 days 12.76 11.58 13.78 7.37 8.19 7.94 Compressive strength (MPa)_4 hours KS L ISO 679 10.3 12.3 10.0 15.3 14.9 15.1 Compressive strength (MPa)_1 day 17.3 18.5 15.4 22.3 21.4 23.0 Compressive strength (MPa)_28 days 36.1 38.2 33.7 42.1 40.8 41.3 Adhesion strength (MPa)_ 4 hours KS F 2476 1.89 1.78 1.72 0.52 0.65 0.63 Adhesion strength (MPa)_ 1 day 2.7 2.65 2.74 1.41 1.58 1.48 Adhesion strength (MPa)_ 28 days 2.76 2.67 2.80 1.62 1.82 1.78 Wear resistance (mass loss (mg/㎟))_28 days KS F 2813 0.12 0.09 0.10 0.40 0.52 0.47 Length change rate (%) KS F 2424 -0.007 -0.008 -0.008 -0.015 -0.013 -0.018 crack resistance AASHTO PP34-98 no cracks no cracks no cracks crack occurrence crack occurrence crack occurrence

As can be seen in Table 4, the ultra-fast and ultra-flat flooring composition having excellent smoothness and durability according to Examples 1 to 3 was compared with the comparative flooring composition according to Comparative Examples 1 to 3, and the rate of change in length due to drying shrinkage. And it was confirmed that the wear resistance was low. In addition, it was confirmed that Examples 1 to 3 had excellent adhesion strength and excellent impact resistance and durability compared to Comparative Examples 1 to 3, and it was possible to secure ductility by increasing the ratio of flexural strength/compressive strength.

In addition, FIG. 1 below is a SEM photograph of an ultra-smooth and ultra-flat flooring composition of Example 1 according to the present invention having excellent smoothness and durability and a flooring composition of Comparative Example 1. In Example 1, it was confirmed that a polymer coating (film) was formed in the hydrate to secure ductility.

As described above, those skilled in the art to which the present invention pertains will understand that the present invention can be embodied in other specific forms without changing its technical spirit or essential features. Therefore, all of the embodiments described above are illustrative and should be understood as not limiting. The scope of the present invention should be construed as including all changes or modifications derived from the meaning and scope of the claims to be described later and their equivalent concepts rather than the above detailed description included in the scope of the present invention.

Claims (6)

40 to 60% by weight of fine aggregate, 20 to 45% by weight of functional binder and 1 to 30% by weight of functional admixture,
The functional binder is 100 parts by weight of Irwin-based clinker fine powder, 20 to 40 parts by weight of one type ordinary Portland cement, 10 to 30 parts by weight of calcium sulfoaluminate, 5 to 20 parts by weight of anhydrite, 1 to 10 parts by weight of an antigelling agent, and poly 0.1 to 10 parts by weight of a carboxylic acid-based water reducing agent,
The functional admixture is 100 parts by weight of cellulose nanofiber-containing vinyl acetate-ethylene (VAE) copolymer, 1 to 5 parts by weight of calcium carbonate surface-treated with wax having an ester bond, 1 to 5 parts by weight of carbon nanotube-elastomer crosslinked product Part by weight, 0.1 to 10 parts by weight of spermine, 0.1 to 10 parts by weight of steviol glycoside, and 1 to 5 parts by weight of thiodiphosphate.
According to claim 1,
Calcium carbonate surface-treated with wax having the ester bond
Mixing 100 parts by weight of spherical calcium carbonate with 1 to 50 parts by weight of a solid wax having an ester bond having a melting point of 40 ° C. or higher;
An ultra-fast and ultra-flat flooring composition having excellent smoothness and durability, characterized in that it is prepared by stirring the mixed mixture at 70 to 90 ° C, then cooling to room temperature and grinding it.
According to claim 1,
The carbon nanotube-elastomer crosslinked product is
preparing surface-modified carbon nanotubes by plasma-treating the carbon nanotubes in an environment of a nitrogen-containing compound other than nitrogen gas;
preparing a tetrafluorinated ethylene-perfluoroalkyl vinyl ether rubber (FFKM) solution;
Preparing a dispersion by dispersing 0.1 to 10 parts by weight of the surface-modified carbon nanotubes prepared above in 100 parts by weight (solid basis) of a tetrafluorinated ethylene-perfluoroalkyl vinyl ether rubber (FFKM) solution;
removing the solvent from the dispersion, drying it, and then mixing and kneading a crosslinking agent; and
An ultra-fast and ultra-flat flooring composition with excellent smoothness and durability, characterized in that it is prepared by heating the kneaded product to prepare a carbon nanotube-elastomer crosslinked product.
According to claim 1,
The vinyl acetate-ethylene (VAE) copolymer containing the cellulose nanofibers
Preparing a base resin by heating and melting 100 parts by weight of vinyl acetate-ethylene resin and 5 to 10 parts by weight of vegetable oil at 120 to 160 ° C;
Mixing and kneading 0.1 to 1 part by weight of cellulose nanofibers having a length of 200 nm to 2000 nm and an average diameter of 3 nm to 10 nm with respect to 100 parts by weight of the vinyl acetate-ethylene resin in the prepared base resin. An ultra-fast, ultra-flat flooring composition having excellent smoothness and durability, characterized in that it is prepared.
According to claim 4,
The prepared base resin further includes 0.1 to 5 parts by weight of a fluorosulfonylimide salt;
The fluorosulfonylimide salt is a combination of lithium bis(fluorosulfonyl)imide represented by Formula 1 and ammonium bis(fluorosulfonyl)imide (NH ₄ FSI) represented by Formula 2 below: An ultra-fast, ultra-flat flooring composition having excellent smoothness and durability, characterized in that it is mixed in a weight ratio of 0.5 to 1.
[Formula 1]

[Formula 2]

A construction surface cleaning step of cleaning the construction surface of the floor to be constructed;
A primer application step of uniformly applying a primer on the construction surface after the construction surface preparation step is finished;
A stirring step of uniformly mixing by stirring the ultra-flat flooring composition having excellent smoothness and durability according to any one of claims 1 to 5; and
A floor construction method comprising a flooring application step of uniformly applying the agitated super-fast and ultra-flat flooring composition having excellent smoothness and durability on a primer-coated surface.

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