KR100658808B1 - Manufacturing method of cement board - Google Patents

Abstract

The present invention relates to a method for producing a cement plate used as a building exterior material or interior material, and more particularly to a method for producing a cement plate having a natural rough surface and at the same time having a compressive strength of natural marble.

The present invention forms a first mixture by adding ice or styrofoam to cement, sand, vermiculite, charcoal, and pearl rock, and extruding and then drying or heating the mixture to form voids when removing ice or styrofoam. It forms a rough surface with a similar texture and can be used as an interior material for sound absorption, absorption, deodorization and anion release. In addition, the extrusion process by high pressure press in the extrusion process will have a much improved compressive strength than conventional cement members.

Cement board

Description

MANUFACTURING METHOD OF CEMENT BOARD

1 is a perspective view of a cement sheet produced in accordance with the present invention.

FIG. 2 is a front view of the cement plate of FIG. 1. FIG.

3 is a rear view of the cement plate of FIG. 1.

4 is a perspective view of a cement sheet according to the present invention prepared by adding char.

FIG. 5 is a rear view of the cement plate of FIG. 4. FIG.

Figure 6 (a), (b) is a flow chart showing the manufacturing method of the cement plate according to the present invention, Figure 6 (a) shows a case of mixing ice, Figure 6 (b) is a mixture of styrofoam The case is shown.

<Description of main parts of drawing>

1 cement + sand

2 cement + sand + charcoal powder

3 pearl rock

4 vermiculite

5 voids (the place where original ice, styrofoam was)

6 Front

7 Rear view

The present invention relates to a method for producing a cement plate used as a building exterior material or interior material, and more particularly to a method for producing a cement plate having a naturally rough surface while having a strength of natural marble.

Conventionally, marble and cement boards have been used as building exterior materials and interior materials. In the case of marble, in spite of its strength and good aesthetics, the result of its extensive use for a long time is not only easy for the viewer, but also has a problem that cannot be easily used due to high price.

In addition, there was a cement plate manufactured by mixing cement and sand in the past, but when it is compressed, the surface becomes smooth like glass, so that it does not satisfy the desire of consumers who want a rough and natural texture like marble, and according to the needs of consumers. In the case of manufacturing by hand in order to make a rough surface, the strength is weakened, there is a problem that the life of the plate is short and easily broken.

Recently, interest in the so-called sick house syndrome, which causes allergic diseases and atopic diseases, such as formaldehyde, toluene, and Staphylococcus aureus emitted from building interior and exterior materials, and the harmful effects of electromagnetic waves emitted from various electronic products have increased. There is an urgent need for countermeasures.

Therefore, a plate having a rough surface, such as marble, excellent compressive strength, deodorization, moisture absorption, electromagnetic shielding, and the like, and at the same time cheaper than marble, has been required.

In order to solve the above problems, an object of the present invention is to provide a method of manufacturing a cement plate having a natural rough surface similar to marble and having the same strength as natural marble in terms of compressive strength. In the present invention, while compressing strongly to increase the compressive strength, so as to have a smooth, naturally rough surface, such as glass, vermiculite, charcoal, pearl rock, ice, styrofoam was mixed with a cement composition composed of conventional cement and sand.

In order to achieve the above object, the present invention prepares a first mixture by mixing 200 parts by weight of sand, 30 parts by weight of vermiculite, 30 parts by weight of pearl rock, 10 parts by weight of ice, and 50 to 70 parts by weight of water, relative to 100 parts by weight of cement and cement. A first mixing step; A second mixing step of preparing a second mixture by mixing 200 parts by weight of sand and 50 to 70 parts by weight of water with respect to 100 parts by weight of cement and cement; Pouring the first mixture into a mold for first extrusion; Pouring the second mixture on top of the first mixture of the mold for second extrusion; It relates to a cement plate manufacturing method comprising the step of melting the ice while curing the molded body produced by the first, second extrusion molding at room temperature for at least 72 hours.

Meanwhile, the present invention provides a first mixing step of preparing a first mixture by mixing 200 parts by weight of sand, 100 parts by weight of vermiculite, 30 parts by weight of vermiculite, 30 parts by weight of pearl rock, 10 parts by weight of styrofoam and 50 to 70 parts by weight of water. ; A second mixing step of preparing a second mixture by mixing 200 parts by weight of sand and 50 to 70 parts by weight of water with respect to 100 parts by weight of cement and cement; Pouring the first mixture into a mold for first extrusion; Pouring the second mixture on top of the first mixture of the mold for second extrusion; Drying and curing the molded bodies prepared by the first and second extrusion molding; It provides a cement plate manufacturing method comprising the step of burning the styrofoam by heating the cured molded body at 250 ~ 300 ℃ for 10 to 60 seconds.

In another aspect, the present invention relates to a cement plate manufacturing method characterized in that it further comprises 10 to 150 parts by weight of charcoal powder compared to 100 parts by weight of cement in the second mixture.

The material of the cement sheet according to the present invention is cement, 200 parts by weight of sand, 100 parts by weight of vermiculite, 10 to 150 parts by weight of charcoal, 30 parts by weight of pearl rock, 10 parts by weight of ice or styrofoam, and 50 to 70 parts by weight of cement. It is water of wealth.

Cement or sand used in the present invention is a well-known configuration for producing a cement sheet, so the description thereof will be omitted.

Vermiculite has pearlescent luster and is porous and has good absorption ability, so it has heat and soundproof effect, and its content is 30 parts by weight.

Pearl rock has a pearl interference due to its structure, giving pearl luster, and its content is 30 parts by weight.

Pearl rock and vermiculite form a film on the surface of the ice or styrofoam around the ice and styrofoam, and later the natural marble texture after removing the ice and styrofoam.

In addition, 10 parts by weight of ice having a diameter of 3 to 5 mm is added, which naturally melts away after extrusion to form voids, thereby forming a rough surface. The extrusion process takes place at room temperature, but the ice melts naturally after extrusion because it uses industrial ice that does not melt easily and the process from mixing to extrusion takes place in only one to two minutes. In addition, 10 parts by weight of styrofoam may be added instead of ice, which later forms a void when removed by heating.

Charcoal suppresses the generation of decayed bacteria to eliminate the source of odor, fine pores play a role of adsorbing odor, and thermal efficiency is increased by far-infrared radiation, which can save energy.

In addition, charcoal emits high emissivity and far-infrared rays even at low temperatures, so it absorbs and decomposes formaldehyde, toluene, and staphylococcus aureus to prevent allergic syndrome and atopic disease in the skin and respiratory organs, creating a fresh indoor environment. Do it.

In addition, the anion emitted from charcoal absorbs positive ions from the electronics and neutralizes them, thus blocking harmful electromagnetic waves. Humidity can be maintained, and condensation can be prevented due to temperature differences between indoors and outdoors.

In the present invention, the charcoal may be added to the second mixture for forming the rear surface of the cement plate according to the present invention in the form of pulverized charcoal powder, the content of which is selected in the range of 10 to 150 parts by weight according to the demand of the consumer Can be.

1 is a perspective view of a cement plate manufactured according to an embodiment of the present invention, which is composed of a front portion 6 and a rear portion 7. The front part 6 is the part which the 1st mixture completed by process of extrusion molding etc., and the back part 7 is the part which the 2nd mixture was completed by process of extrusion molding etc. The components forming the front part 6 are cement, sand, vermiculite, pearl rock, ice, and water, and the components forming the rear part 7 are cement, sand, and water.

FIG. 2 is a front view of the cement sheet of FIG. 1, showing a front portion. FIG. In the figure, (1) is cement and sand, (3) is pearlite, (4) is vermiculite, and (5) is a gap where a conventional ice or styrofoam was used. The front surface of the cement plate according to the present invention is not only cement and sand, but also contains pearl rock and vermiculite, the gloss and the particles are seen from the outside to look beautiful. In addition, as the place where the original ice or styrofoam was used as a void, a rough textured surface is formed.

FIG. 3 shows a back view of the cement plate of FIG. 1 seen from the back. Unlike the front part of FIG. 2, the rear part shows a smooth surface like glass, and there is no pearl rock, vermiculite, or pores, so no grains are present and the surface is smooth because no pores are present. This shows the same surface as in the case of extruding a cement plate formed of conventional cement and sand only.

4 is a perspective view of a cement board according to the present invention manufactured by adding charcoal, and includes a front part 6 and a rear part 7 similarly to the cement board of FIG. 1. The front part 6 is the part which the 1st mixture completed by process of extrusion molding etc., and the back part 7 is the part which the 2nd mixture was completed by process of extrusion molding etc. The components forming the front part 6 are cement and sand, vermiculite, pearl rock, ice and water, and the components forming the rear part 7 are cement and sand, charcoal powder and water. Charcoal is added only to the rear part 7 so that the shape of the front part is the same as that shown in FIG.

5 is a rear view of the cement board of FIG. As shown in the rear portion of Figure 3 shows a smooth surface like glass and there is no pearl rock or vermiculite, no pores, grains do not exist, there are no pores, but because of the charcoal powder is black compared to the rear portion of FIG.

6 is a flowchart illustrating a method of manufacturing a cement plate according to the present invention, in which FIG. 6 (a) illustrates the first embodiment and FIG. 6 (b) illustrates the second embodiment. Hereinafter, the first and second embodiments will be described with reference to Figs. 6 (a) and 6 (b).

<First Embodiment>

200 parts by weight of cement and 100 parts by weight of cement, 30 parts by weight of vermiculite, 30 parts by weight of pearl rock, 10 parts by weight of ice having a diameter of 3 to 5 mm, and 50 parts by weight of water are mixed to prepare a first mixture to form a front part. S1) In addition, 200 parts by weight of cement and 100 parts by weight of cement and 50 parts by weight of water are mixed to prepare a second mixture to form a rear part. At this time, 10 to 150 parts by weight of charcoal powder may be further added. (S2) Then, the first mixture is blown between molds by a high-pressure jet nozzle, filled into the mold to a thickness of 2 mm, and extruded by a 250-ton press. (S3) In the same manner on the first mixture, the second mixture is 4-30 mm thick and is extruded by a 250-ton press. (S4) When the first mixture and the second mixture are combined to form a molded body, Take out and allow to dry for 72 hours while naturally drying. At this time, the ice is naturally melted while drying naturally. (S5) After curing for 72 hours, the cement plate is completed, the surface of the front surface becomes rough like the texture of marble.

Second Embodiment

200 parts by weight of cement and 100 parts by weight of cement, 30 parts by weight of vermiculite, 30 parts by weight of pearl rock, 10 parts by weight of styrofoam, and 50 parts by weight of water are mixed to prepare a first mixture to form the front part. To prepare a second mixture to form a rear portion by mixing 200 parts by weight of sand and 50 parts by weight of water with respect to 100 parts by weight of cement. At this time, 10 to 150 parts by weight of charcoal powder can be further added. (S12) In addition, the second mixture is filled into a 4 to 30mm thickness on the first mixture and extruded by a 250-ton press. (S13) When the first mixture and the second mixture are combined to form a molded body, Take out and dry naturally and cured for 72 hours. (S14) Then, the cured molded body is heated at 280 ° C. for 30 seconds to burn styrofoam and the cement board is completed (S15).

As a result of measuring the compressive strength of the cement sheet manufactured as described above by the compressive strength measuring machine, it came out to 700kgf / ㎠ or more, which is 400kgf / ㎠, the compressive strength of the cement plate made of conventional cement and sand It is 75% higher than that of natural marble.

The cement plate produced according to the present invention has a surface roughened by the formation of voids in the place where ice or styrofoam was present, and thus can express a texture similar to marble. . In addition, since the grains of vermiculite or pearl rock are visible on the surface, pearl gloss and natural aesthetics can be produced, as well as extruded and molded at a high pressure, it is much improved compared to conventional cement boards and has a compressive strength similar to that of natural marble.

In addition, by adding charcoal to the back of the cement plate can perform a deodorization, heat insulation and humidity control function, it is possible to obtain the effect of blocking the electromagnetic waves by generating negative ions from the charcoal.

Claims (3)

In the method of manufacturing a cement plate for building, A first mixing step of preparing a first mixture by mixing 200 parts by weight of sand and 100 parts by weight of cement, 30 parts by weight of vermiculite, 30 parts by weight of pearl rock, 10 parts by weight of ice, and 50 to 70 parts by weight of water; A second mixing step of preparing a second mixture by mixing 200 parts by weight of sand and 50 to 70 parts by weight of water with respect to 100 parts by weight of cement and cement; Pouring the first mixture into a mold for first extrusion; Pouring the second mixture on top of the first mixture of the mold for second extrusion; A method of manufacturing a cement plate comprising the steps of melting the ice while drying and curing the molded bodies produced by the first and second extrusion molding at room temperature for at least 72 hours. In the method of manufacturing a cement plate for building, A first mixing step of preparing a first mixture by mixing 200 parts by weight of cement and 100 parts by weight of cement, 30 parts by weight of vermiculite, 30 parts by weight of pearl rock, 10 parts by weight of styrofoam and 50 to 70 parts by weight of water; A second mixing step of preparing a second mixture by mixing 200 parts by weight of sand and 50 to 70 parts by weight of water with respect to 100 parts by weight of cement and cement; Pouring the first mixture into a mold for first extrusion; Pouring the second mixture on top of the first mixture of the mold for second extrusion; Curing the molded bodies produced by the first and second extrusion molding; Method for producing a cement plate comprising the step of burning the styrofoam by heating the cured molded body at 250 ~ 300 ℃ for 10 to 60 seconds. The method according to claim 1 or 2, The second mixing step is a cement plate manufacturing method, characterized in that for producing a second mixture further comprising 10 to 150 parts by weight of charcoal powder compared to 100 parts by weight of cement.

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