KR102214709B1 - Granite slab with strong thermal barrier to alleviate heat island and method for manufacturing the same - Google Patents

Abstract

The present invention relates to building exterior and interior materials having strong heat resistance for alleviating a heat island effect, a granite slab used for civil engineering and landscaping, and a method of manufacturing the same, and specifically, to a granite slab and a method of manufacturing the same, wherein the granite slab used as building exterior and interior materials and for civil engineering, landscaping, and the like is obtained by containing a resin composition for improving heat resistance and strength, and thus, heat resistance and durability of the granite slab can be improved. The granite slab comprises: a plate-shaped main body made of granite stone; a heat shielding resin composition contained in the main body and provided to improve heat resistance of the main body; a strength enhancing resin composition contained in the main body and provided to improve strength and wear resistance of the main body.

Description

Granite slab with strong thermal barrier to alleviate heat island and method for manufacturing the same, used for interior and exterior materials of buildings with strong heat shielding properties for mitigating the heat island phenomenon, and granite slab used for civil engineering and landscaping work

The present invention relates to an interior and exterior material of buildings with strong heat shielding properties for mitigating heat island phenomenon, granite stone slabs used for civil engineering, and landscaping, and a manufacturing method thereof, and more particularly, granite stone used for interior and exterior materials of buildings, civil works, landscape works, etc. The present invention relates to a granite slate material and a method of manufacturing the same so that heat shielding properties and durability can be improved by including a resin composition for improving heat shielding property and strength in the slate material.

Stone has been used for various purposes such as aggregates for construction and civil engineering, masonry or finishing materials, and exterior materials. Among them, granite, in particular, not only has a beautiful surface, but its price is considerably lower than that of marble, so it is widely used as a stone plate for interior and exterior construction, civil engineering, and landscape works.

However, these granite slabs are heated to a high temperature by radiant energy from the sun, especially in summer, thereby causing a heat island phenomenon in urban areas.

In addition, granite slabs can be easily damaged by an external force, and when used for sidewalks or roadways, there is a problem that the surface is easily worn by long-term use.

[Document 1] Korean Registered Patent Publication No. 10-0908070 (Registered 2009.07.09.)

The present invention has been devised to solve the above problems, and heat shielding properties and durability can be improved by including a resin composition for improving heat shielding properties and strength in granite slabs used for interior and exterior materials of buildings, civil works, and landscape works. The purpose of this is to provide granite slabs and methods of manufacturing the same.

The problem to be solved of the present invention is not limited to the mentioned problem. Other technical problems that are not mentioned will be clearly understood by those of ordinary skill in the art from the following description.

Granite stone plate according to an embodiment of the present invention in order to solve the above problems, the main body of the plate shape made of granite; A heat shielding resin composition contained in the body to improve heat shielding properties of the body; And a strength-enhancing resin composition contained in the main body to improve strength and abrasion resistance of the main body.

In an embodiment of the present invention, the heat-shielding resin composition comprises titanium dioxide, zinc oxide, aluminum oxide, urethane resin and lithium silicate, and the zinc oxide is decomposed into nano-sized particles by a chemical method and mixed.

In an embodiment of the present invention, the strength enhancing resin composition is 25 to 30% by weight of methyl methacrylate, 25 to 30% by weight of polypropylene glycol acrylate, 5 to 10% by weight of butyl acrylate, polyoxypropylene glycerol tree It consists of 4 to 5% by weight of ether, 01 to 1% by weight of lithium silicate, 1 to 2% by weight of surfactant, 1 to 2% by weight of a polycarboxylic acid fluidizing agent, and 30 to 38% by weight of water.

In an embodiment of the present invention, the heat-shielding resin composition and the strength-enhancing resin composition are sprayed onto the body to penetrate the body and finely coat the surface of the body.

In an embodiment of the present invention, the mixture of the heat-shielding resin composition and the strength-enhancing resin composition comprises 35 to 45% by weight of the heat-shielding resin composition and 55 to 65% by weight of the strength-enhancing resin composition.

On the other hand, in order to solve the above problems, the method of manufacturing a granite slab according to an embodiment of the present invention includes a chalazing process for separating the granite ore into a plate shape of a certain thickness, and a surface treatment for surface treatment of the slit granite plate. And, by performing the cutting process of cutting the surface-treated granite plate to a certain standard, the washing process of washing the cut granite plate, and the drying process of drying the washed granite plate, the body in the shape of a plate made of granite is manufactured. A main body manufacturing step; A heat-shielding resin composition manufacturing step of decomposing zinc oxide into nano-sized particles by a chemical method, and mixing the zinc oxide, titanium dioxide, aluminum oxide, urethane resin, and lithium silicate to prepare a heat-shielding resin composition; 25 to 30% by weight of methyl methacrylate, 25 to 30% by weight of polypropylene glycol acrylate, 5 to 10% by weight of butyl acrylate, 4 to 5% by weight of polyoxypropylene glycerol triether, 01 to 1% by weight of lithium silicate , 1 to 2% by weight of a surfactant, 1 to 2% by weight of a polycarboxylic acid-based fluidizing agent, and 30 to 38% by weight of water are mixed to prepare a strength enhancing resin composition; A resin composition mixing step of mixing the heat shielding resin composition and the strength enhancing resin composition in a weight ratio of 35 to 45:55 to 65; A resin composition spraying step of spraying a mixture of the heat shielding resin composition and the strength enhancing resin composition onto the surface of the body; And a drying step of drying the body after the resin composition spraying step.

According to the present invention, the heat shielding property of the granite slab material is improved by the heat shielding resin composition contained in the granite slab material, and accordingly, there is an effect that can greatly alleviate the heat island phenomenon in an urban area. In addition, since the strength and abrasion resistance of the granite slab may be improved by the resin composition for strength enhancement contained in the granite slab, there is an effect that the durability of the granite slab may be greatly improved.

1 is a cross-sectional view of a granite slab material according to an embodiment of the present invention.
2 is a cross-sectional view of a granite slate material according to an embodiment of the present invention, and is a view for explaining the principle of heat shielding by zinc oxide contained in the main body.
Figure 3 is a flow chart of a granite slab manufacturing method according to an embodiment of the present invention.
Figures 4a to 4e is a test result report of the Korea Chemical Convergence Testing Institute on the abrasion resistance of the granite slab material and the existing granite slab according to an embodiment of the present invention (Go Heung-seok sample).
5A to 5D are a test result report (Hwabukseok sample) of the Korea Chemical Convergence Testing Institute on the abrasion resistance of the granite slab material and the existing granite slab according to an embodiment of the present invention.
6A to 6E are a report of the test results of the Korea Chemical Convergence Testing Institute on the surface temperature characteristics (heat insulation properties) of granite slabs and existing granite slabs according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. For convenience of description, components illustrated in the drawings may be exaggerated, omitted, or schematically represented.

1 is a cross-sectional configuration diagram of a granite slate according to an embodiment of the present invention, and Fig. 2 is a cross-sectional configuration diagram of a granite slate according to an embodiment of the present invention, for explaining the principle of heat shielding by zinc oxide contained in the body It is a drawing.

As shown in Figs. 1 and 2, the interior and exterior materials of buildings with strong heat shielding properties for mitigating the heat island phenomenon according to the embodiment of the present invention and granite slate used for civil engineering and landscaping work (hereinafter referred to as ``granite slate'' ) Is largely composed of a main body 10 and a heat-shielding resin composition 20 contained in the main body 10, and a resin composition 30 for enhancing strength.

The main body 10 is made of a plate made of granite.

Here, the granite refers to a coarse-grained rock composed mainly of quartz, feldspar, and mica, and includes trace amounts of apatite, titanite, gallium, magnetite, and the like.

The main body 10 may be manufactured in various thicknesses according to the standards listed in the specifications of natural stone slabs in the Public Procurement Service Nara Market Shopping Mall. For example, the main body is 25mm, 30mm, 40mm, 50mm, 60mm, 80mm, 100mm, 110mm, 120mm, 150mm, 200mm and 300mm thick according to the standards listed in the above specification. Can be manufactured. In addition, the main body may be manufactured in various thicknesses according to the needs of the user in addition to the above standards.

The heat-shielding resin composition 20 (represented by dots in the enlarged view of Fig. 1 [c]) is contained in the main body 10 to improve the heat-shielding property of the main body, and includes titanium dioxide, zinc oxide, aluminum oxide, and urethane. It contains resin and lithium silicate.

Here, the titanium dioxide is a colorless or white powder and has no odor and taste. The chemical formula is TiO ₂ . It is insoluble in water, hydrochloric acid, dilute sulfuric acid, alcohol, and other organic solvents. It is a white pigment that has a very high negative effect and does not dissolve in acids other than hot concentrated sulfuric acid.

The zinc oxide is a compound of oxygen and zinc and is a light white powder, and is also referred to as zinc oxide and zinc white. The chemical formula is ZnO. It exists as red zinc in nature and is obtained through combustion and heating. It is used as a raw material for medicines, pigments and cosmetics. The melting point is 1,975℃ (pressurized), 1,720℃ (normal pressure), and the specific gravity is 547 (amorphous) and 578 (crystalline). It is an amphoteric oxide that is hardly soluble in water, but soluble in dilute acids and concentrated alkalis.

The aluminum oxide is a compound of aluminum and oxygen and is also referred to as alumina. It exists in nature as corundum, ruby, sapphire, etc., and there are α-aluminum oxide and β-aluminum oxide. The chemical formula is Al ₂ O ₃ . It is used as a catalyst adsorbent, a refractory material, and an abrasive.

The urethane resin is a synthetic polymer having a urethane bond (-NH-CO-). It has excellent impact resistance, abrasion resistance, and rigidity, and has thermal insulation properties. In the present invention, the urethane resin provides durability by improving the strength and wear resistance of the body.

The lithium silicate is an aqueous solution of a compound of silica (SiO ₂ ) and lithium alkali (Li ₂ O). An important advantage of lithium silicate is that it can produce products with a higher molar ratio than sodium or potassium silicate. In other words, since it is stable at room temperature, has low viscosity, and has low solubility, it is not easily eluted by moisture, so that whitening is hardly caused.

Meanwhile, since the zinc oxide is not easily decomposed by water, in the present invention, it is decomposed into nanoparticles by a chemical method and used as a component of the composition. In addition, titanium dioxide and aluminum oxide are easier to decompose smaller than zinc oxide, but may be decomposed in a chemical process together during the chemical decomposition treatment for decomposition of zinc oxide described above for convenience of the manufacturing process and reduction of manufacturing cost.

The zinc oxide component of this characteristic is dispersed and mixed with other raw materials as shown in FIG. 2 to block the rays that transmit heat by scattering and reflecting the rays of sunlight having thermal energy such as infrared, visible and ultraviolet rays. By doing so, it plays a very beneficial role in improving the heat shielding property pursued by the present invention. Among the rays of sunlight, infrared rays have a longer wavelength and have a lot of thermal energy compared to ultraviolet rays, but the wavelength of the ultraviolet rays is mixed into the coating layer composition so that it does not pass through the nanoparticles without colliding with zinc oxide. If it is, it will be good for the heat shielding effect.

The strength-enhancing resin composition (30, represented by dots in the enlarged view of Fig. 1 [c]) is contained in the main body to improve the strength and abrasion resistance of the main body. Methyl methacrylate 25 to 30% by weight, poly Propylene glycol acrylate 25 to 30 wt%, butyl acrylate 5 to 10 wt%, polyoxypropylene glycerol triether 4 to 5 wt%, lithium silicate 0.1 to 1 wt%, surfactant 1 to 2 wt%, polycarbon It consists of 1 to 2% by weight of an acid-based fluidizing agent and 30 to 38% by weight of water.

Here, the methyl methacrylate is used to improve ductility and viscoelasticity. It is preferable that the content of the methyl methacrylate is 25 to 30% by weight. When the content of the methyl methacrylate exceeds 30% by weight, ductility and viscoelasticity are improved, but the viscosity is lowered, resulting in poor workability and price competitiveness, and when the content of methyl methacrylate is less than 25% by weight, ductility and viscoelasticity are improved. The effect may be weak.

The polypropylene glycol acrylate is a kind of organic solvent and is preferably used in an amount of 25 to 30% by weight in order to reduce the content of the solvent while sufficiently improving the polymerizability of the monomer component.

The butyl acrylate is for imparting flexural strength to the body. When the content of the butyl acrylate is 5 to 10% by weight, the flexural strength of the main body can be stably secured.

The polyoxypropylene glycerol triether has strong dispersing and emulsifying power and excellent interfacial adsorption, so that it is possible to facilitate mixing of polyurethane raw materials. The polyoxyflophyllene glycerol triether is preferably 4 to 5% by weight, and when the polyoxyflophyllene glycerol triether is less than 4% by weight, it may be difficult to mix in a water-soluble resin due to its low viscosity. When the oxyflophyllene glycerol triether is greater than 5%, a large amount of air bubbles in the water-soluble resin may occur.

The lithium silicate has an effect of making the structure of the main body more robust and improving the durability of the main body.

The surfactant is for accelerating the curing of the strength enhancing resin composition 30. As the surfactant, ethoxylated nonylphenyl is typical.

The polycarboxylic acid-based fluidizing agent is preferably polyethylene glycol sulfonic acid ether or polyethylene glycol methacrylic acid.

In principle, fresh water is used as the water, and 30 to 38% by weight is preferable.

The reason why the strength-enhancing resin composition 30 is included in the main body 10 is because it has an excellent effect in preventing cracking and freezing and thawing as well as improving strength.

On the other hand, the heat-shielding resin composition 20 and the strength enhancing resin composition 30 by spraying a mixture thereof to the main body 10 as shown in [B] of FIG. In addition to being penetrated, it may be finely coated on the surface of the body 10.

In this case, the mixture may be made of 35 to 45% by weight of the heat-shielding resin composition and 55 to 65% by weight of the resin composition for enhancing strength.

When the mixture is sprayed onto the main body 10, the mixture penetrates into the main body 10 through the pores formed in the main body 10 as shown in the enlarged view of FIG. 1 [c], and the mixture When sprayed for a predetermined time, a fine coating layer 40 is formed on the upper surface of the main body 10.

The fine coating layer 40 affects the strength of the main body 10, particularly the wear resistance, and reflects and scatters the light incident on the main body 10 to improve heat shielding properties.

The heat-shielding resin composition 20 and the strength-enhancing resin composition 30 are applied to the surface of the main body 10 by using a roller or brush in addition to the spraying method described above, or the main body 10 is applied to the vehicle. It may be contained in the body 10 through various methods, such as a method of immersing the thermal resin composition 20 and the strength enhancing resin composition 30.

Hereinafter, a method of manufacturing a granite slab according to an embodiment of the present invention will be described with further reference to FIG. 3.

3 is a flow chart of a method for manufacturing a granite slab according to an embodiment of the present invention.

As shown in Figure 3, the method of manufacturing a granite slab according to an embodiment of the present invention is largely a main body manufacturing step (S10), a heat shielding resin composition manufacturing step (S20), a strength enhancing resin composition manufacturing step (S30), and resin. It comprises a composition mixing step (S40), a resin composition spraying step (S50) and a drying step (S60).

The main body manufacturing step (S10) includes a splitting process (S11) of separating the granite raw stone into a plate shape of a predetermined thickness, a surface treatment process (S12) of surface treatment of the divided granite plate material, and the surface-treated granite plate material to a certain standard. By performing the cutting process (S13) of cutting, the cleaning process (S14) of cleaning the cut granite plate, and the drying process (S15) of drying the washed granite plate, the body 10 in the shape of a plate made of granite It is a step of manufacturing.

Here, the raw stone is a rectangular parallelepiped granite stone collected from a stone mountain, and in the halseok process (S11), the raw stone is cut out to be divided into a plate shape.

In the surface treatment process S12, the granite plate is processed to have the required texture and color by performing fine trimming, polishing processing, and burner processing heated with a burner on the granite plate material that has been subjected to the splitting process S11.

In the heat-shielding resin composition manufacturing step (S20), zinc oxide is decomposed into nano-sized particles by a chemical method, and the zinc oxide, titanium dioxide, aluminum oxide, urethane resin, and lithium silicate are mixed to form a heat-shielding resin composition (20). It is a step of manufacturing.

The strength-enhancing resin composition manufacturing step (S30) includes 25 to 30% by weight of methyl methacrylate, 25 to 30% by weight of polypropylene glycol acrylate, 5 to 10% by weight of butyl acrylate, and polyoxypropylene glycerol triether 4 ∼5 wt%, lithium silicate 01∼1 wt%, surfactant 1∼2 wt%, polycarboxylic acid fluidizing agent 1∼2 wt%, and water 30∼38 wt% were mixed to prepare a strength enhancing resin composition (30). It is a manufacturing step.

The resin composition mixing step (S40) is a step of mixing the heat shielding resin composition 20 and the strength enhancing resin composition 30 in a weight ratio of 35 to 45:55 to 65.

This step may be carried out by transferring the heat-shielding resin composition 20 and the strength enhancing resin composition 30 stored in the resin storage tank to a stirring tank and stirring.

On the other hand, the heat-shielding resin composition manufacturing step (S20), the strength enhancing resin composition manufacturing step (S30), and the resin composition mixing step (S40) are performed using a batcher plant, so that the heat-shielding resin composition 20 ) And the strength-enhancing resin composition 30, and the process of mixing them may be made automatically.

The resin composition spraying step (S50) is a step of spraying a mixture of the heat shielding resin composition 20 and the strength enhancing resin composition 30 onto the surface of the main body 10.

In this step, while the main body 10 is placed on a conveyor and transferred, a nozzle 100 (see FIG. 1) is installed on the upper part of the conveyor, and the heat-shielding resin composition 20 and the strength It may be carried out by spraying a mixture of the resin composition 30 for enhancement onto the surface of the main body 10.

After being sprayed through the nozzle 100, the mixture that has not penetrated into the main body 10 and flows down may be returned to the stirring tank through a drain device installed on the conveyor. At this time, it is preferable to install a filter made of a sieve of about 300 mesh in the stirring tank, so that the mixture stored in the stirring tank is filtered by the filter and then sprayed through the nozzle 100. Do.

The drying step (S60) is a step of drying the body 10 after the resin composition spraying step (S50).

This step may be carried out by passing the resin composition spraying step (S50) by transporting the body 10 containing the heat-shielding resin composition 20 and the strength enhancing resin composition 30 to the outdoors and drying naturally.

Figs. 4 to 6 show the results of requesting a test of the granite slate according to the configuration and manufacturing method as described above to the'Korea Testing and Research Institute'.

4A to 4E are test result reports (Go Heung-seok samples) of the Korea Institute of Chemical Convergence Testing on the abrasion resistance of granite slabs and existing granite slabs according to an embodiment of the present invention, and FIGS. 5A to 5D are implementations of the present invention. It is a test result report (Hwabukseok sample) of the Korea Chemical Convergence Testing Institute on the abrasion resistance of granite slab material and existing granite slab according to an example, and FIGS. 6A to 6E are granite slab material and existing granite slab according to an embodiment of the present invention. This is a report of the test results of the Korea Testing and Research Institute on the surface temperature characteristics (heat insulation) of ash.

As a result of organizing the test results of the Korea Testing and Research Institute, the test results as shown in [Table 1] were obtained.

Evaluation item unit KS standard Existing product Developed products Remark Wear resistance (Go Heungseok) ｇ No standard 0.043 0.009 477% (4.77 times) Wear resistance (Hwabukseok) ｇ No standard 0.036 0.009 400% (4.00 times) Surface temperature (heat insulation) ℃ No standard 57.3 47.2 (-) 10.1 Back temperature (heat insulation) ℃ No standard 45.4 41.9 (-) 3.5

As shown in [Table 1], the abrasion resistance of the granite slate of the present invention has been improved by 4.77 times compared to the existing product in the case of Goheungseok (granite stone from Goheung-gun, Jeollanam-do), and the case of Hwabukseok (granite stone from Hwabuk-myeon, Sangju-si, Gyeongsangbuk-do) compared to the existing product. It has improved 4 times.

In addition, as shown in [Table 1], the surface temperature of the granite slab material of the present invention was 10.1°C lower than that of the existing product, and the back surface temperature was 3.5°C lower than that of the existing product.

As confirmed through the above [Table 1] and test report, the abrasion resistance and heat shielding properties of the granite slab according to the present invention have been greatly improved compared to the existing products, and accordingly, the granite slab according to the present invention greatly alleviates the heat island phenomenon in urban areas. It can be seen that there is an effect that can be improved, and the durability is greatly improved.

In the above description, the present invention has been described with reference to limited embodiments and drawings, but it will be apparent to those of ordinary skill in the art that various modifications can be implemented within the scope of the technical idea of the present invention. Therefore, the scope of protection of the present invention should be determined by the description of the claims and their equivalent range.

10: main body
20: heat-shielding resin composition
30: resin composition for strength enhancement
40: coating layer

Claims (6)

The surface treatment of granite sheet by performing the calcination process (S11) of separating the granite raw stone into a plate shape of a certain thickness, and the surface treatment of the granite sheet by performing fine trimming, grinding processing, and burner processing to heat the quarantined granite sheet material (S12). And, by performing the cutting process (S13) of cutting the surface-treated granite plate to a certain standard, the cleaning process (S14) of washing the cut granite plate, and the drying process (S15) of drying the washed granite plate, The body manufacturing step (S10) of manufacturing the body 10 in the shape of a plate made of granite;
Decomposing zinc oxide into nano-sized particles by a chemical method, mixing the zinc oxide, titanium dioxide, aluminum oxide, urethane resin, and lithium silicate to prepare a heat-shielding resin composition 20 (S20) );
25 to 30% by weight of methyl methacrylate, 25 to 30% by weight of polypropylene glycol acrylate, 5 to 10% by weight of butyl acrylate, 4 to 5% by weight of polyoxypropylene glycerol triether, 01 to 1% by weight of lithium silicate , 1 to 2% by weight of a surfactant, 1 to 2% by weight of a polycarboxylic acid fluidizing agent, and 30 to 38% by weight of water are mixed to prepare a strength enhancing resin composition (30) (S30) ;
Resin composition mixing step of transferring the heat-shielding resin composition 20 and the strength enhancing resin composition 30 stored in each resin storage tank to a stirring tank and mixing them in a weight ratio of 35 to 45: 55 to 65 (S40) ;
While the main body 10 is placed on a conveyor and transferred, a mixture of the heat-shielding resin composition 20 and the strength-enhancing resin composition 30 through a nozzle 100 installed on the conveyor is transferred to the main body 10 ) Spraying the resin composition on the surface of the spraying step (S50); And
Drying step (S60) of drying the body 10 that has passed through the resin composition spraying step (S50); used for interior and exterior materials of buildings with strong heat shielding properties for alleviating the heat island phenomenon, and civil works, and landscape works, comprising Manufacturing method of granite slab
As a granite slab material manufactured by the method of claim 1, a mixture of the heat-shielding resin composition (20) and the strength enhancing resin composition (30) on the surface of the body (10) in the resin composition spraying step (S50) In the process of fine coating by spraying, the mixture forms a fine coating layer 40 on the surface of the body 10 and at the same time penetrates into the body through the pores of the body 10. Granite slate used for interior and exterior materials of buildings with strong heat shielding properties, civil works, and landscaping work.
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