Fire-resistant gypsum board for building and preparation method of fire-resistant gypsum board

Abstract

The invention provides a building fire-resistant gypsum board and a preparation method thereof, and relates to the technical field of building materials. The invention relates to a fire-resistant gypsum board for a building. The material comprises the following raw materials: 20-40 parts of calcium sulfate dihydrate, 30-45 parts of diatomite, 20-35 parts of silicate, 50-65 parts of desulfurized gypsum, 15-25 parts of a foaming agent, 20-35 parts of aluminum oxide, 20-35 parts of polypropylene fiber, 20-35 parts of vinyl chloride resin, 10-15 parts of a pore forming agent, 10-15 parts of silicon carbide, 10-15 parts of paper pulp, 10-15 parts of ammonium bicarbonate, 10-15 parts of an acrylate reinforcing agent and 10-15 parts of a toughening agent. After the materials are mixed, the gypsum board with good performance can be formed, the gypsum board has high strength, fire resistance and sound insulation performance, the calcium sulfate dihydrate can absorb a large amount of heat to play a role in flame retardance, and the internal polypropylene fiber and paper pulp improve the fracture load and ensure the stability of the gypsum board.

Description

Technical Field

[0001] The invention relates to the technical field of building materials, in particular to a fire-resistant gypsum board for construction and a preparation method thereof. Background Art

[0002] Gypsum board is a material made of building gypsum as the main raw material. It is a building material with light weight, high strength, thin thickness, easy processing, good sound insulation, heat insulation and fire resistance. It is one of the new lightweight boards that are currently being developed. Gypsum board has been widely used in various buildings such as residences, office buildings, shops, hotels and industrial plants for interior partitions, wall coverings (instead of wall plastering), ceilings, sound-absorbing panels, ground base panels and various decorative panels.

[0003] Refractory materials are inorganic non-metals with poor mechanical toughness. Although refractory materials hardly need to be moved during use, their poor mechanical toughness also affects their thermal shock resistance at high temperatures. Due to the large temperature difference during rapid cooling and heating and in the gaps between uses, refractory materials are very likely to crack and peel off under the action of thermal expansion and contraction, which affects the integrity of the refractory materials and reduces their service life. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a fire-resistant gypsum board for construction and a preparation method thereof, which solves the problem of short service life of refractory materials.

[0005] To achieve the above purpose, the present invention is implemented through the following technical scheme: a fire-resistant gypsum board for construction, whose raw materials include, by weight: 20-40 parts of calcium sulfate dihydrate, 30-45 parts of diatomaceous earth, 20-35 parts of silicate, 50-65 parts of desulfurized gypsum, 15-25 parts of foaming agent, 20-35 parts of aluminum oxide, 20-35 parts of polypropylene fiber, 20-35 parts of vinyl chloride resin, 10-15 parts of pore-forming agent, 10-15 parts of silicon carbide, 10-15 parts of pulp, 10-15 parts of ammonium bicarbonate, 10-15 parts of acrylate reinforcing agent and 10-15 parts of toughening agent.

[0006] Preferably, the calcium sulfate dihydrate, i.e., raw gypsum, refers to natural dihydrate gypsum (CaSO4·2H2O), which is white monoclinic crystal or crystalline powder, odorless, hygroscopic, loses one molecule of crystal water at 128°C, loses all water at 163°C, is slightly soluble in acid, sodium thiosulfate and ammonium salt solution, is soluble in 400 parts of water, is less soluble in hot water, is very slowly soluble in glycerol, and is insoluble in ethanol and most organic solvents.

[0007] Preferably, the polypropylene fiber is a synthetic fiber made of polypropylene as a raw material. Polypropylene is a thermoplastic resin with good wear resistance, tensile strength and acid and alkali corrosion resistance.

[0008] Preferably, the ammonium bicarbonate, with the chemical formula NH4HCO3, also known as ammonium hydrogenamino carbonate, is a white solid powder.

[0009] Preferably, the foaming agent is sodium octadecyl sulfate or sodium stearate.

[0010] Preferably, a method for preparing a fire-resistant gypsum board for construction comprises the following steps:

[0011] S1: Raw material preparation

[0012] Add water into a mixer, mix calcium sulfate dihydrate, diatomaceous earth, silicate, desulfurized gypsum, foaming agent, alumina, polypropylene fiber, vinyl chloride resin, pore-forming agent, silicon carbide, pulp, ammonium bicarbonate, acrylate reinforcing agent and toughening agent according to a certain ratio, then perform ultrasonic dispersion, and stir thoroughly;

[0013] S2: Forming

[0014] The mixture is poured into a forming mold, vibrated and compacted to form a sheet of the desired size and thickness.

[0015] S3: Curing

[0016] After the board is formed, it needs to be cured under appropriate temperature and humidity conditions to obtain certain strength and fire resistance.

[0017] S4: Cutting and trimming

[0018] The cured sheets are cut and trimmed to meet the needs of different sizes and specifications.

[0019] S5: Packaging and storage

[0020] Finally, the finished panels are packaged and properly stored for sale and use.

[0021] The present invention provides a fire-resistant gypsum board for construction and a preparation method thereof. The board has the following beneficial effects:

[0022] The present invention can form a gypsum board with good performance after mixing these materials, and has high strength, fire resistance and sound insulation performance. The calcium sulfate dihydrate can absorb a large amount of heat to play a flame retardant role, and the internal polypropylene fiber and pulp increase the breaking load and ensure the stability of the gypsum board. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Embodiment 1:

[0025] The embodiment of the present invention provides a fire-resistant gypsum board for construction, wherein the raw materials thereof include, by weight: 40 parts of calcium sulfate dihydrate, 45 parts of diatomaceous earth, 35 parts of silicate, 65 parts of desulfurized gypsum, 25 parts of foaming agent, 35 parts of aluminum oxide, 35 parts of polypropylene fiber, 35 parts of vinyl chloride resin, 15 parts of pore-forming agent, 15 parts of silicon carbide, 15 parts of pulp, 15 parts of ammonium bicarbonate, 15 parts of acrylate reinforcing agent and 15 parts of toughening agent;

[0026] Silicon carbide has high temperature strength and wear resistance. Pulp can enhance the tensile strength of gypsum board. Polypropylene fiber is a synthetic fiber polymerized from polypropylene (PP). It has the characteristics of light weight, wear resistance, corrosion resistance, antibacterial and easy cleaning. Alumina has good high temperature resistance and can maintain stability at high temperatures. Therefore, it is often used as the main component of refractory materials.

[0027] Calcium sulfate dihydrate, also known as raw gypsum, refers to natural dihydrate gypsum (CaSO4·2H2O), which is white monoclinic crystal or crystalline powder, odorless, hygroscopic, loses 1 molecule of crystal water at 128°C, and loses all water at 163°C. It is slightly soluble in acid, sodium thiosulfate and ammonium salt solution, soluble in 400 parts of water, less soluble in hot water, very slowly soluble in glycerol, and insoluble in ethanol and most organic solvents.

[0028] Polypropylene fiber is a synthetic fiber made from polypropylene as raw material. Polypropylene is a thermoplastic resin with good wear resistance, tensile strength and acid and alkali corrosion resistance.

[0029] Ammonium bicarbonate, with the chemical formula NH4HCO3, also known as ammonium hydrogenamino carbonate, is a white solid powder.

[0030] The foaming agent is sodium octadecyl sulfate or sodium stearate.

[0031] A method for preparing a fire-resistant gypsum board for construction comprises the following steps:

[0032] S1: Raw material preparation

[0033] Add water into a mixer, mix calcium sulfate dihydrate, diatomaceous earth, silicate, desulfurized gypsum, foaming agent, alumina, polypropylene fiber, vinyl chloride resin, pore-forming agent, silicon carbide, pulp, ammonium bicarbonate, acrylate reinforcing agent and toughening agent according to a certain ratio, then perform ultrasonic dispersion, and stir thoroughly;

[0034] S2: Forming

[0035] The mixture is poured into a forming mold, vibrated and compacted to form a sheet of the desired size and thickness.

[0036] S3: Curing

[0037] After the board is formed, it needs to be cured under appropriate temperature and humidity conditions to obtain certain strength and fire resistance.

[0038] S4: Cutting and trimming

[0039] The cured sheets are cut and trimmed to meet the needs of different sizes and specifications.

[0040] S5: Packaging and storage

[0041] Finally, the finished panels are packaged and properly stored for sale and use.

[0042] Embodiment 2:

[0043] The embodiment of the present invention provides a fire-resistant gypsum board for construction. The raw materials thereof include, by weight, 20 parts of calcium sulfate dihydrate, 30 parts of diatomaceous earth, 20 parts of silicate, 50 parts of desulfurized gypsum, 15 parts of foaming agent, 20 parts of aluminum oxide, 20 parts of polypropylene fiber, 20 parts of vinyl chloride resin, 10 parts of pore-forming agent, 10 parts of silicon carbide, 10 parts of pulp, 10 parts of ammonium bicarbonate, 10 parts of acrylate reinforcing agent and 10 parts of toughening agent.

[0044] Calcium sulfate dihydrate, also known as raw gypsum, refers to natural dihydrate gypsum (CaSO4·2H2O), which is white monoclinic crystal or crystalline powder, odorless, hygroscopic, loses 1 molecule of crystal water at 128°C, and loses all water at 163°C. It is slightly soluble in acid, sodium thiosulfate and ammonium salt solution, soluble in 400 parts of water, less soluble in hot water, very slowly soluble in glycerol, and insoluble in ethanol and most organic solvents.

[0045] Polypropylene fiber is a synthetic fiber made from polypropylene as raw material. Polypropylene is a thermoplastic resin with good wear resistance, tensile strength and acid and alkali corrosion resistance.

[0046] Ammonium bicarbonate, with the chemical formula NH4HCO3, also known as ammonium hydrogenamino carbonate, is a white solid powder.

[0047] The foaming agent is sodium octadecyl sulfate or sodium stearate.

[0048] A method for preparing a fire-resistant gypsum board for construction comprises the following steps:

[0049] S1: Raw material preparation

[0050] Add water into a mixer, mix calcium sulfate dihydrate, diatomaceous earth, silicate, desulfurized gypsum, foaming agent, alumina, polypropylene fiber, vinyl chloride resin, pore-forming agent, silicon carbide, pulp, ammonium bicarbonate, acrylate reinforcing agent and toughening agent according to a certain ratio, then perform ultrasonic dispersion, and stir thoroughly;

[0051] S2: Forming

[0052] The mixture is poured into a forming mold, vibrated and compacted to form a sheet of the desired size and thickness.

[0053] S3: Curing

[0054] After the board is formed, it needs to be cured under appropriate temperature and humidity conditions to obtain certain strength and fire resistance.

[0055] S4: Cutting and trimming

[0056] The cured sheets are cut and trimmed to meet the needs of different sizes and specifications.

[0057] S5: Packaging and storage

[0058] Finally, the finished panels are packaged and properly stored for sale and use.

[0059] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fire-resistant gypsum board for construction, characterized in that: The raw materials include, by weight: 20-40 parts of calcium sulfate dihydrate, 30-45 parts of diatomaceous earth, 20-35 parts of silicate, 50-65 parts of desulfurized gypsum, 15-25 parts of foaming agent, 20-35 parts of aluminum oxide, 20-35 parts of polypropylene fiber, 20-35 parts of vinyl chloride resin, 10-15 parts of pore-forming agent, 10-15 parts of silicon carbide, 10-15 parts of pulp, 10-15 parts of ammonium bicarbonate, 10-15 parts of acrylate reinforcing agent and 10-15 parts of toughening agent.

2. A fire-resistant gypsum board for construction and a preparation method thereof according to claim 1, characterized in that: The calcium sulfate dihydrate, i.e., raw gypsum, refers to natural dihydrate gypsum (CaSO4·2H2O), which is white monoclinic crystal or crystalline powder, odorless, hygroscopic, loses one molecule of crystal water at 128°C, and loses all water at 163°C. It is slightly soluble in acid, sodium thiosulfate and ammonium salt solution, soluble in 400 parts of water, less soluble in hot water, very slowly soluble in glycerol, and insoluble in ethanol and most organic solvents.

3. A fire-resistant gypsum board for construction and a preparation method thereof according to claim 1, characterized in that: The polypropylene fiber is a synthetic fiber made of polypropylene as a raw material. Polypropylene is a thermoplastic resin with good wear resistance, tensile strength and acid and alkali corrosion resistance.

4. A fire-resistant gypsum board for construction and a preparation method thereof according to claim 1, characterized in that: The ammonium bicarbonate, with the chemical formula of NH4HCO3, also known as ammonium hydrogenamino carbonate, is a white solid powder.

5. A fire-resistant gypsum board for construction and a preparation method thereof according to claim 1, characterized in that: The foaming agent is sodium octadecyl sulfate or sodium stearate.

6. A method for preparing a fire-resistant gypsum board for construction, characterized in that: The following steps are involved: S1: Raw material preparation Add water into a mixer, mix calcium sulfate dihydrate, diatomaceous earth, silicate, desulfurized gypsum, foaming agent, alumina, polypropylene fiber, vinyl chloride resin, pore-forming agent, silicon carbide, pulp, ammonium bicarbonate, acrylate reinforcing agent and toughening agent according to a certain ratio, then perform ultrasonic dispersion, and stir thoroughly; S2: Forming The mixture is poured into a forming mold, vibrated and compacted to form a sheet of the desired size and thickness. S3: Curing After the board is formed, it needs to be cured under appropriate temperature and humidity conditions to obtain certain strength and fire resistance. S4: Cutting and trimming The cured sheets are cut and trimmed to meet the needs of different sizes and specifications. S5: Packaging and storage Finally, the finished panels are packaged and properly stored for sale and use.