High-strength, high-toughness and rain-resistant infrared cement heat-preserving decorative board

Abstract

The invention belongs to the technical field of constructing material cement decorative boards, and discloses a high-strength, high-toughness and rain-resistant infrared cement heat-preserving decorative board which is good in mechanical strength, toughness, rain resistance, fire resistance, heat insulation performance, sound absorption performance, moisture resistant characteristic and far-infrared radiation capacity. In comparison with an existing cement decorative board, the bending strength of the decorative board can be improved by 1.5-3 times, the compression strength can be improved by more than 2 times, the fire resistance is improved by 10-20 times, and the rain resistance characteristic is improved by 2-5 times. A core board layer of the decorative board is composed of Portland cement, high-alumina cement, gypsum, inorganic far-infrared powder, fine aggregate, inorganic retarding agent, organic retarding agent, water reducing agent and moisture repellent, and the upper surface and the lower surface of the decorative board are respectively provided with vinylon non-woven fabric. Coal ash, black iron ore powder, sodium phosphate capable of forming ionic bonds are preferably selected as key raw material, and the moisture repellent technology is applied to filler aggregate and the surface of a hardened body. In order to improve affinity, the width-length ratio of the non-woven fabric is 0.5-0.62, the diameter of the fiber is 15-45 microns, and the surface of the decorative board is treated in an activating mode.

Description

technical field [0001] The invention relates to a cement decorative board, in particular to an infrared cement thermal insulation decorative board with high mechanical strength, high toughness and rain resistance, and belongs to the technical field of cement decorative boards for building materials. Compared with glass magnesium decorative boards and cement decorative boards, which are currently sold in the market, its bending strength can be increased by 1.5 to 3 times, its compressive strength can be increased by more than 2 times, and its fire resistance (flame resistance time) can be improved by 10 to 20 times. , the rain resistance is enhanced by 2 to 5 times, and it is light in weight, good in heat preservation, heat insulation, sound absorption, waterproof, good in moisture absorption and halogen resistance, and has good anion and 4-14 μm far-infrared radiation characteristics. Therefore, it can not only be used as an interior wall decoration board, but also quite suita...

AI Technical Summary

Problems solved by technology

[0003] 1. Due to the formula of cement decorative board and glass magnesium board and some organic materials inside, its flame resistance is unstable, and sometimes deflagration will occur when encountering an open flame, resulting in the failure of fire prevention of glass magnesium decorative board

Strictly speaking, the current glass magnesium board and some cement decorative boards are only non-combustible, not really fireproof

[0004] 2. In order to fully and quickly condense magnesium, the Baume degree of magnesium chloride should not be too low. If the content of magnesium chloride is too low, the purpose of sufficient and rapid condensing cannot be achieved, and the mechanical strength is very low and there are many cracks; and When the content of magnesium chloride meets the purpose of fully and rapidly coagulating magnesium, its Baume degree is too high, that is, the content of chloride ions is too high, which leads to the precipitation of magnesium chloride and the phenomenon of "returning white"

Therefore, it is easy to cause the board to absorb moisture and return to halogen, and cause corrosion to metals, etc.

[0005] 3. In order to achieve light weight, most of the cement decorative panels are made of porous materials, and the water-repellent treatment or waterproof treatment is improper, and the following phenomena exist: A. If the waterproof treatment is not in place, the pores will be large and easy to absorb water; when the ambient humidity is high , as the equilibrium moisture content of the cement decorative board of the outer wall increases, the thermal conductivity of water is much larger than that of still air, so the thermal conductivity decreases and the thermal insulation performance decreases

At present, the skin function similar to that of human beings has not been achieved in China: external moisture cannot penetrate into the interior of the thermal insulation decorative panel, but the dew condensation inside the decorative panel is easily vaporized and discharged outside the decorative panel

[0006] 4. The existing technology usually simply pursues the mechanical strength or toughness of cement board or glass magnesium board

In most cement decorative boards and glass magnesium decorative boards, it is difficult to see products with a perfect combination of high strength and good toughness, and few of them are used as exterior wall decorative boards.

[0007] 5. The use is narrow; most of the cement decorative panels and glass magnesium decorative panels are only used as interior walls of ordinary buildings, and few people use them as high-end products in museums, hotels, high-end restaurants, hospitals, entertainment venues, etc. It emits 4-14μm far-infrared rays and negative oxygen ions, and plays the role of sanitation and health care such as sterilization, insecticide, and air purification.

[0008] In order to overcome the above-mentioned shortcomings, many technicians have carried out innovative activities. For example, the patent with the publication number CN1939873 uses calcium silicate powder, organic silicon, gypsum powder and plant fibers to solve the phenomenon of moisture absorption and halogen return, but its shear strength and The mechanical rigidity is still not too high, and there is still the possibility of deflagration and pulverization

Although the CN201785930U patent adopts magnesium oxide-magnesium sulfate material fireproof board, it still cannot solve the problem, because the characteristics of magnesium sulfate and magnesium chloride are similar, and there is also the problem of "returning white" and other problems of the above-mentioned magnesium chloride.

[0009] Obviously, most of the existing ordinary cement decorative boards and glass magnesium boards are difficult to reach the national or The requirements of industry standards are not easy to fully meet the requirements for the use of interior and exterior walls of various buildings as decorative panels. In addition, there are no negative ions and 4-14 μm far-infrared radiation, and there is no skin function similar to human: the outside world Moisture cannot penetrate into the interior of the thermal insulation decorative board, but the condensation water droplets inside the decorative board are easily vaporized and discharged outside the decorative board

thus limiting their use

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