Fireproof plate structure adopting calcium silicate plate and manufacturing method of fireproof plate structure

Abstract

The invention relates to the technical field of fireproof boards, and discloses a fireproof board structure adopting a calcium silicate board and a manufacturing method.The fireproof board structure comprises a base layer, a fireproof layer and a decoration layer, the fireproof layer is prepared from, by weight, 15-30 parts of Portland cement, 30-50 parts of quartz sand, 5-15 parts of slaked lime and 2-8 parts of hollow glass beads; 2-5 parts of glass beads, 2-4 parts of modified basalt fibers, 3-7 parts of microfibrillated cellulose and 10-15 parts of water. According to the modified basalt fiber, through surface modification, the fireproof and flame-retardant performance of the board is improved, meanwhile, the characteristics of high strength and high elastic modulus of the basalt fiber are not affected, the board has the excellent fireproof effect, meanwhile, the excellent mechanical performance is kept, and the comprehensive use value of the board is improved.

Description

Technical Field

[0001] This invention relates to the field of fireproof board technology, specifically to a fireproof board structure using calcium silicate board and its manufacturing method. Background Technology

[0002] Calcium silicate board is a new type of inorganic non-metallic board made from siliceous and calcareous materials as the core substrate, combined with appropriate reinforcing fibers and auxiliary additives, through processes such as pulping, molding, and autoclaving. It possesses multiple properties including lightweight, high strength, moisture and mildew resistance, sound insulation, and heat insulation, making it widely used in the field of building fire protection. Current building fire protection codes require the board to meet the A1 non-combustible standard, requiring it to maintain structural integrity continuously in high-temperature environments of 950℃ and above, without deformation, cracking, or open flame, while also maintaining low density and sufficient mechanical strength. While inorganic fibers such as basalt fiber and ceramic fiber possess excellent high-temperature resistance and mechanical properties, they suffer from strong surface inertness, poor dispersion uniformity in aqueous slurries, and insufficient interfacial bonding with the calcium silicate substrate, easily leading to the formation of pores or cracks within the board. Furthermore, inorganic flame retardants require large doses to achieve the ideal flame-retardant effect, easily leading to increased board density and reduced toughness, making it difficult to achieve a balance between flame-retardant performance and usability.

[0003] Patent application number 201611019163.X discloses a calcium silicate fireproof board and its preparation method. By adding hydrated calcium silicate to the raw materials, the thermal conductivity and thermal shrinkage rate of the fireproof board are reduced. However, hydrated calcium silicate requires multiple steps to prepare, necessitates the addition of a desodiuming agent, and requires strict control of the formulation dosage. Patent application number 201811042661.5 discloses a calcium silicate powder, its preparation method, a fireproof board using it, and a method for preparing the fireproof board. It prepares calcium silicate powder by mechanically and chemically activating siliceous and calcareous waste residues. Compared with ordinary calcium silicate boards, it optimizes the mechanical properties, but does not provide additional performance enhancement for fire resistance and flame retardancy. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a fireproof board structure using calcium silicate board and its manufacturing method.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] A fireproof board structure using calcium silicate board includes a base layer, a fireproof layer, and a decorative layer. The base layer is made of calcium silicate board, and the decorative layer comprises the following raw materials in parts by weight: 10-30 parts mullite, 15-25 parts silicate cement, 1-3 parts expanded perlite, 0.5-2 parts polyvinyl alcohol, 0.5-1 part guar gum, 1-2 parts colorant, 0.5-0.8 parts silane coupling agent, and 13-16 parts water.

[0007] The fireproof layer comprises the following raw materials in parts by weight: 15-30 parts silicate cement, 30-50 parts quartz sand, 5-15 parts hydrated lime, 2-8 parts hollow glass microspheres, 2-5 parts vitrified microspheres, 2-4 parts modified basalt fiber, 3-7 parts microfibrillated cellulose, and 10-15 parts water.

[0008] The hollow glass microspheres are passed through a 250-300 mesh sieve and cleaned with deionized water;

[0009] The bulk density of the vitrified microspheres is 80-120 kg / m³. 3 ;

[0010] The modified basalt fiber is prepared by the following steps:

[0011] Step A1: Mix 1,3,5-triglycidyl-S-triazine trione and sulfadiazine, add p-toluenesulfonic acid, use toluene as solvent, reflux at 120°C for 4 h, after the reaction is completed, filter and dry under vacuum to obtain intermediate product 1;

[0012] Furthermore, the ratio of 1,3,5-triglycidyl-S-triazinetrione, sulfadiazine, p-toluenesulfonic acid, and toluene is 0.8-1 mol: 2.41-3.01 mol: 0.05-0.07 mol: 400-600 mL;

[0013] In step A1, 1,3,5-triglycidyl-S-triazinetrione and sulfadiazine undergo a ring-opening reaction, introducing a hydroxyl group into the system and providing reaction conditions for the subsequent esterification reaction. The introduced triazinetrione structure can release flame-retardant gases through the gas phase, thereby diluting the heat and oxygen concentration in the surrounding environment and achieving a green and environmentally friendly high-efficiency flame retardant effect. In addition, sulfadiazine contains sulfur, which can form sulfur free radicals through thermal decomposition and generate non-combustible gases, effectively improving the flame retardant efficiency of the system.

[0014] Step A2: Mix intermediate product 1, dimethyl sulfoxide and 3-(2,3-epoxypropoxy)propyltrimethoxysilane, heat to 90°C, add tetramethylammonium bromide, heat to 100°C and react for 6 hours. After the reaction is completed, cool to room temperature and distill under reduced pressure to obtain intermediate product 2.

[0015] Furthermore, the ratio of intermediate 1, dimethyl sulfoxide, 3-(2,3-epoxypropoxy)propyltrimethoxysilane and tetramethylammonium bromide is 0.6-0.8 mol: 100-150 mL: 9-12 mol: 0.06-0.08 mol;

[0016] In step A2, intermediate product 1 and 3-(2,3-epoxypropoxy)propyltrimethoxysilane undergo a ring-opening reaction, introducing hydrolyzable siloxanes into the system and providing reaction conditions for subsequent grafting reactions. The introduced silicon element can form a dense silicon-containing protective carbon layer on the material surface during combustion, blocking heat transfer and achieving the purpose of flame retardancy and fire prevention.

[0017] Step A3: Soak the basalt fiber in water for 5 hours, then soak it in acetone solution for 5 hours. After taking it out, wash and dry it. Mix it with intermediate product 2 solution, stir it, and then place the system in a constant temperature water bath at 40°C for 0.5 hours. After that, take out the fiber, dry it, and obtain modified basalt fiber.

[0018] Furthermore, the ratio of basalt fiber, water, acetone and intermediate product 2 solution is 1-3g: 20-60mL: 15-45mL: 50-70mL;

[0019] Furthermore, the intermediate product 2 solution is prepared by mixing intermediate product 2, ethanol and deionized water in a volume ratio of 0.02-0.04 mol: 50-70 mL: 4-8 mL;

[0020] In step A3, the siloxane in intermediate product 2 is hydrolyzed to generate silanol groups, which then condense with the hydroxyl groups on the surface of basalt fiber to form siloxane covalent bonds. This process avoids excessive self-polymerization of siloxane and ensures efficient bonding between intermediate product 2 and the fiber surface. Basalt fiber has properties such as high strength, high elastic modulus, and high temperature resistance. By introducing flame-retardant monomers containing nitrogen, sulfur, and silicon elements onto its surface, the chemical modification of the fiber surface is achieved, thereby improving the flame retardancy and fire resistance of the system.

[0021] A method for manufacturing a fireproof board structure using calcium silicate board includes the following steps:

[0022] Step S1: Weigh the fireproof layer raw materials according to the weight parts, mix silicate cement, quartz sand, quicklime, hollow glass microspheres, vitrified microspheres, microfibrillated cellulose and water, stir at 1400-1600 rpm for 12-17 minutes, then reduce the speed to 1000-1200 rpm, add modified basalt fiber, and continue stirring for 10-15 minutes to obtain the mixture;

[0023] Step S2: Pour the mixture into a mold, vacuum filter until no water drips down after 10 seconds, remove it, hydraulically form, steam cure, and dry to obtain a fireproof layer. The working conditions for hydraulic forming are: pressure of 8 MPa and holding time of 8 min. The working conditions for steam curing are: steam pressure of 1.2 MPa, temperature of 165-170℃, and time of 10-12 h.

[0024] Step S3: Weigh the decorative layer material according to the weight proportions, mix and stir evenly, then spread it in the mold. The thickness of the decorative layer is 5-10mm. Curing is carried out at room temperature to obtain the decorative layer.

[0025] Step S4: Adhere one side of the fireproof layer to the calcium silicate board base layer and the other side to the decorative layer using phenolic resin. The viscosity of the phenolic resin is 4000-5000 mpa.s. After bonding, a fireproof board structure using calcium silicate board is obtained.

[0026] The beneficial effects of this invention are:

[0027] The fireproof board structure using calcium silicate board of this invention can be widely used in key fireproof parts such as building firewalls, ceilings, partitions, and steel structure cladding. Its core advantage stems from the innovative application of modified basalt fiber. The organic flame retardant and basalt fiber work synergistically to significantly improve the fire resistance and flame retardancy of the board. At the same time, the high strength, high elastic modulus, and high temperature resistance of the modified basalt fiber significantly enhance the board's resistance to cracking and impact, preventing pulverization and collapse under high temperature environments and maintaining good dimensional stability. Furthermore, the board maintains structural integrity and basic mechanical properties even under high-temperature baking, exhibiting reliable temperature resistance and durability, effectively extending its service life and reducing subsequent maintenance and replacement costs. Compared with existing technologies, this invention achieves the integration of flame retardant function and original properties through surface modification of basalt fiber, eliminating the need for adding large amounts of flame retardant fillers, thus ensuring the original performance of the board. It has significant technical advantages and broad market application prospects.

[0028] The modified basalt fiber of this invention first undergoes a ring-opening reaction with 1,3,5-triglycidyl-S-triazine trione and sulfadiazine. The introduced triazine trione structure can release flame-retardant gases in the gas phase, thereby diluting the heat and oxygen concentration in the surrounding environment, achieving a green and environmentally friendly high-efficiency flame-retardant effect. In addition, sulfadiazine contains sulfur, which can form sulfur free radicals through thermal decomposition and generate non-combustible gases, effectively improving the flame-retardant efficiency of the system. Subsequently, it undergoes a ring-opening reaction with 3-(2,3-epoxypropoxy)propyltrimethoxysilane, introducing hydrolyzable siloxanes into the system, providing reaction conditions for subsequent grafting reactions. The introduced silicon can form a dense silicon-containing protective carbon layer on the material surface during combustion, blocking heat transfer and achieving the purpose of flame retardancy and fire prevention. Finally, siloxane alkyl groups are hydrolyzed to generate silanol groups, which then condense with hydroxyl groups on the surface of basalt fibers to form siloxane covalent bonds. This process avoids excessive self-polymerization of siloxane alkyl groups and ensures efficient bonding between the product and the fiber surface. Basalt fibers have high strength, high elastic modulus, and high temperature resistance. Flame-retardant monomers containing nitrogen, sulfur, and silicon elements are introduced onto their surface to achieve chemical modification of the fiber surface, thereby improving the flame retardancy and fire resistance of the system. Detailed Implementation

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Example 1: Modified basalt fiber was prepared by the following steps:

[0031] Step A1: Mix 1,3,5-triglycidyl-S-triazine trione and sulfadiazine, add p-toluenesulfonic acid, use toluene as solvent, and reflux at 120°C for 4 hours. After the reaction is complete, filter and dry under vacuum to obtain the intermediate product 1,1,3,5-triglycidyl-S-triazine trione. The molar ratio of sulfadiazine, p-toluenesulfonic acid and toluene is 0.8 mol: 2.41 mol: 0.05 mol: 400 mL.

[0032] Step A2: Mix intermediate 1, dimethyl sulfoxide, and 3-(2,3-epoxypropoxy)propyltrimethoxysilane, heat to 90°C, add tetramethylammonium bromide, heat to 100°C and react for 6 hours. After the reaction is complete, cool to room temperature and distill under reduced pressure to obtain intermediate 2. The molar ratio of intermediate 1, dimethyl sulfoxide, 3-(2,3-epoxypropoxy)propyltrimethoxysilane, and tetramethylammonium bromide is 0.6 mol: 100 mL: 9 mol: 0.06 mol.

[0033] Step A3: Soak basalt fibers in water for 5 hours, then soak them in acetone solution for 5 hours. After soaking, wash and dry them. Mix them with intermediate product 2 solution, stir, and place the system in a 40℃ constant temperature water bath for 0.5 hours. After that, remove the fibers and dry them to obtain modified basalt fibers. The ratio of basalt fibers, water, acetone and intermediate product 2 solution is 1g:20mL:15mL:50mL. Intermediate product 2 solution is prepared by mixing intermediate product 2, ethanol and deionized water in a ratio of 0.02mol:50mL:4mL.

[0034] Example 2: Modified basalt fiber was prepared by the following steps:

[0035] Step A1: Mix 1,3,5-triglycidyl-S-triazine trione and sulfadiazine, add p-toluenesulfonic acid, use toluene as solvent, and reflux at 120°C for 4 hours. After the reaction is complete, filter and dry under vacuum to obtain the intermediate product 1,1,3,5-triglycidyl-S-triazine trione. The molar ratio of sulfadiazine, p-toluenesulfonic acid and toluene is 0.9 mol: 2.71 mol: 0.06 mol: 500 mL.

[0036] Step A2: Mix intermediate product 1, dimethyl sulfoxide, and 3-(2,3-epoxypropoxy)propyltrimethoxysilane, heat to 90°C, add tetramethylammonium bromide, heat to 100°C and react for 6 hours. After the reaction is complete, cool to room temperature and distill under reduced pressure to obtain intermediate product 2. The molar ratio of intermediate product 1, dimethyl sulfoxide, 3-(2,3-epoxypropoxy)propyltrimethoxysilane, and tetramethylammonium bromide is 0.7 mol: 125 mL: 10.5 mol: 0.07 mol.

[0037] Step A3: Soak basalt fibers in water for 5 hours, then soak them in acetone solution for 5 hours. After soaking, wash and dry them. Mix them with intermediate product 2 solution, stir, and place the system in a 40℃ constant temperature water bath for 0.5 hours. After that, remove the fibers and dry them to obtain modified basalt fibers. The ratio of basalt fibers, water, acetone and intermediate product 2 solution is 2g:40mL:30mL:60mL. Intermediate product 2 solution is prepared by mixing intermediate product 2, ethanol and deionized water in a ratio of 0.03mol:60mL:6mL.

[0038] Example 3: Modified basalt fiber was prepared by the following steps:

[0039] Step A1: Mix 1,3,5-triglycidyl-S-triazine trione and sulfadiazine, add p-toluenesulfonic acid, use toluene as solvent, and reflux at 120°C for 4 hours. After the reaction is complete, filter and dry under vacuum to obtain the intermediate product 1,1,3,5-triglycidyl-S-triazine trione. The ratio of sulfadiazine, p-toluenesulfonic acid and toluene is 1 mol: 3.01 mol: 0.07 mol: 600 mL.

[0040] Step A2: Mix intermediate product 1, dimethyl sulfoxide and 3-(2,3-epoxypropoxy)propyltrimethoxysilane, heat to 90°C, add tetramethylammonium bromide, heat to 100°C and react for 6 hours. After the reaction is completed, cool to room temperature and distill under reduced pressure to obtain intermediate product 2. The molar ratio of intermediate product 1, dimethyl sulfoxide, 3-(2,3-epoxypropoxy)propyltrimethoxysilane and tetramethylammonium bromide is 0.8 mol: 150 mL: 12 mol: 0.08 mol.

[0041] Step A3: Soak basalt fibers in water for 5 hours, then soak them in acetone solution for 5 hours. After soaking, wash and dry them. Mix them with intermediate product 2 solution, stir, and place the system in a 40℃ constant temperature water bath for 0.5 hours. After that, remove the fibers and dry them to obtain modified basalt fibers. The ratio of basalt fibers, water, acetone and intermediate product 2 solution is 3g:60mL:45mL:70mL. Intermediate product 2 solution is prepared by mixing intermediate product 2, ethanol and deionized water in a ratio of 0.04mol:70mL:8mL.

[0042] Example 4: A method for manufacturing a fireproof board structure using calcium silicate board, comprising the following steps:

[0043] The decorative layer comprises the following raw materials in parts by weight: 10 parts mullite, 15 parts silicate cement, 1 part expanded perlite, 0.5 parts polyvinyl alcohol, 0.5 parts guar gum, 1 part colorant, 0.5 parts silane coupling agent, and 13 parts water.

[0044] The fireproof layer comprises the following raw materials in parts by weight: 15 parts silicate cement, 30 parts quartz sand, 5 parts hydrated lime, 2 parts hollow glass microspheres, 2 parts vitrified microspheres, 2 parts modified basalt fiber prepared in Example 1, 3 parts microfibrillated cellulose, and 10 parts water.

[0045] Step S1: Weigh the fireproof layer raw materials according to the weight parts, mix silicate cement, quartz sand, quicklime, hollow glass microspheres, vitrified microspheres, microfibrillated cellulose and water, stir at 1400 rpm for 12 min, then reduce the speed to 1000 rpm, add the modified basalt fiber prepared in Example 1, and continue stirring for 10 min to obtain the mixture;

[0046] Step S2: Pour the mixture into a mold, vacuum filter until no water drips down after 10 seconds, remove it, hydraulically form, steam cure, and dry to obtain a fireproof layer. The working conditions for hydraulic forming are: pressure of 8 MPa and holding time of 8 min. The working conditions for steam curing are: steam pressure of 1.2 MPa, temperature of 165℃, and time of 10 h.

[0047] Step S3: Weigh the decorative layer materials according to the weight proportions, mix them, stir evenly, and spread them in the mold. The thickness of the decorative layer is 5mm. Curing is carried out at room temperature to obtain the decorative layer.

[0048] Step S4: Adhere one side of the fireproof layer to the calcium silicate board base layer and the other side to the decorative layer using phenolic resin with a viscosity of 4000 mpa.s. After bonding, a fireproof board structure using calcium silicate board is obtained.

[0049] Example 5: A method for manufacturing a fireproof board structure using calcium silicate board, comprising the following steps:

[0050] The decorative layer comprises the following raw materials in parts by weight: 20 parts mullite, 20 parts silicate cement, 2 parts expanded perlite, 1 part polyvinyl alcohol, 0.8 parts guar gum, 1.5 parts colorant, 0.6 parts silane coupling agent, and 15 parts water.

[0051] The fireproof layer comprises the following raw materials in parts by weight: 20 parts silicate cement, 40 parts quartz sand, 10 parts hydrated lime, 5 parts hollow glass microspheres, 4 parts vitrified microspheres, 3 parts modified basalt fiber prepared in Example 2, 5 parts microfibrillated cellulose, and 13 parts water.

[0052] Step S1: Weigh the fireproof layer raw materials according to the weight parts, mix silicate cement, quartz sand, quicklime, hollow glass microspheres, vitrified microspheres, microfibrillated cellulose and water, stir at 1500 rpm for 15 min, then reduce the speed to 1100 rpm, add the modified basalt fiber prepared in Example 2, and continue stirring for 13 min to obtain the mixture;

[0053] Step S2: Pour the mixture into a mold, vacuum filter until no water drips down after 10 seconds, remove it, hydraulically form, steam cure, and dry to obtain a fireproof layer. The working conditions for hydraulic forming are: pressure of 8 MPa and holding time of 8 min. The working conditions for steam curing are: steam pressure of 1.2 MPa, temperature of 170℃, and time of 11 h.

[0054] Step S3: Weigh the decorative layer materials according to the weight proportions, mix them, stir evenly, and spread them in the mold. The thickness of the decorative layer is 7mm. Curing is carried out at room temperature to obtain the decorative layer.

[0055] Step S4: Adhere one side of the fireproof layer to the calcium silicate board base layer and the other side to the decorative layer using phenolic resin with a viscosity of 4500 mpa.s. After bonding, a fireproof board structure using calcium silicate board is obtained.

[0056] Example 6: A method for manufacturing a fireproof board structure using calcium silicate board, comprising the following steps:

[0057] The decorative layer comprises the following raw materials in parts by weight: 30 parts mullite, 25 parts silicate cement, 3 parts expanded perlite, 2 parts polyvinyl alcohol, 1 part guar gum, 2 parts colorant, 0.8 parts silane coupling agent, and 16 parts water.

[0058] The fireproof layer comprises the following raw materials in parts by weight: 30 parts silicate cement, 50 parts quartz sand, 15 parts hydrated lime, 8 parts hollow glass microspheres, 5 parts vitrified microspheres, 4 parts modified basalt fiber prepared in Example 3, 7 parts microfibrillated cellulose, and 15 parts water.

[0059] Step S1: Weigh the fireproof layer raw materials according to the weight parts, mix silicate cement, quartz sand, quicklime, hollow glass microspheres, vitrified microspheres, microfibrillated cellulose and water, stir at 1600 rpm for 17 min, then reduce the speed to 1200 rpm, add the modified basalt fiber prepared in Example 3, and continue stirring for 15 min to obtain the mixture.

[0060] Step S2: Pour the mixture into a mold, vacuum filter until no water drips down after 10 seconds, remove it, hydraulically form, steam cure, and dry to obtain a fireproof layer. The working conditions for hydraulic forming are: pressure of 8 MPa and holding time of 8 min. The working conditions for steam curing are: steam pressure of 1.2 MPa, temperature of 170℃, and time of 12 h.

[0061] Step S3: Weigh the decorative layer materials according to the weight proportions, mix them, stir evenly, and spread them in the mold. The thickness of the decorative layer is 10mm. Curing is carried out at room temperature to obtain the decorative layer.

[0062] Step S4: Adhere one side of the fireproof layer to the calcium silicate board base layer and the other side to the decorative layer using phenolic resin with a viscosity of 5000 mpa.s. After bonding, a fireproof board structure using calcium silicate board is obtained.

[0063] Comparative Example 1: This comparative example is a fireproof board structure. The difference between this example and Example 6 is that basalt fiber is used instead of the modified basalt fiber prepared in Example 3. All other aspects are the same.

[0064] Comparative Example 2: This comparative example is a fireproof board structure. The difference between this example and Example 6 is that triphenyl phosphate is used instead of the modified basalt fiber prepared in Example 3. All other aspects are the same.

[0065] Comparative Example 3: This comparative example is a fireproof board structure. The difference between this example and Example 6 is that the modified basalt fiber prepared in Example 3 is not added. All other aspects are the same.

[0066] The performance of the plates prepared in Examples 4-6 and Comparative Examples 1-3 was tested:

[0067] Thermal insulation: The thermal conductivity of the board is tested using a thermal conductivity tester;

[0068] Flame retardancy: The sheet material was tested for UL-94 vertical flammability.

[0069] Referring to JC / T 564.1-2018 "Fiber Reinforced Calcium Silicate Board" and T / CBMF79-2020 "Fireproof Calcium Silicate Board", the apparent density, flexural strength and thermal stability of the board were tested. The thermal stability performance was measured after the board was treated at 950℃ for 4 hours.

[0070] The test results are shown in Table 1:

[0071] Table 1: Performance Test Results

[0072]

[0073] As can be seen from Table 1, the fireproof board prepared by this invention possesses good mechanical properties, flame retardant properties, and thermal insulation properties. The thermal conductivity of the fireproof boards prepared in the examples is below 0.13 W / (m·K), the flame retardant rating is V-0, the flexural strength is not less than 16.1 MPa, and the apparent density is 0.90 g / cm³. 3 The above comparison of Example 6 and Comparative Example 1 shows that the modification of basalt fiber improves the flame retardant properties of the board and reduces its thermal conductivity. Compared with Comparative Example 2, the fireproof board with only flame retardant added has decreased mechanical properties and thermal stability, indicating that the presence of basalt fiber in the raw materials is beneficial to improving the mechanical properties of the board, reducing its thermal conductivity, and improving its thermal stability. This demonstrates that the fireproof board prepared by this invention has the characteristics of high flexural strength, low thermal conductivity, excellent flame retardant properties, and good thermal stability, making it suitable for fire protection in various buildings and public places.

[0074] The above content is merely an example and illustration of the concept of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the scope defined by the inventive concept, they should all fall within the protection scope of the present invention.

Claims

1. A fireproof board structure using calcium silicate board, characterized in that, It includes a base layer, a fireproof layer and a decorative layer. The fireproof layer includes the following raw materials in parts by weight: 15-30 parts silicate cement, 30-50 parts quartz sand, 5-15 parts hydrated lime, 2-8 parts hollow glass microspheres, 2-5 parts vitrified microspheres, 2-4 parts modified basalt fiber, 3-7 parts microfibrillated cellulose, and 10-15 parts water. The modified basalt fiber is prepared by the following steps: Step A1: Mix 1,3,5-triglycidyl-S-triazine trione and sulfadiazine, add p-toluenesulfonic acid, use toluene as solvent, reflux at 120°C for 4 h, after the reaction is completed, filter and dry under vacuum to obtain intermediate product 1; Step A2: Mix intermediate product 1, dimethyl sulfoxide and 3-(2,3-epoxypropoxy)propyltrimethoxysilane, heat to 90°C, add tetramethylammonium bromide, heat to 100°C and react for 6 hours. After the reaction is completed, cool to room temperature and distill under reduced pressure to obtain intermediate product 2. Step A3: Soak the basalt fiber in water for 5 hours, then soak it in acetone solution for 5 hours. After taking it out, wash and dry it. Mix it with intermediate product 2 solution, stir it, and then place the system in a constant temperature water bath at 40℃ for 0.5 hours. After that, take out the fiber, dry it, and obtain modified basalt fiber.

2. The fireproof board structure using calcium silicate board according to claim 1, characterized in that, In step A1, the ratio of 1,3,5-triglycidyl-S-triazine trione, sulfadiazine, p-toluenesulfonic acid, and toluene is 0.8-1 mol. 2.41-3.01mol: 0.05-0.07mol: 400-600mL.

3. The fireproof board structure using calcium silicate board according to claim 1, characterized in that, In step A2, the ratio of intermediate product 1, dimethyl sulfoxide, 3-(2,3-epoxypropoxy)propyltrimethoxysilane and tetramethylammonium bromide is 0.6-0.8 mol: 100-150 mL: 9-12 mol: 0.06-0.08 mol.

4. The fireproof board structure using calcium silicate board according to claim 1, characterized in that, In step A3, the ratio of basalt fiber, water, acetone, and intermediate product 2 solution is 1-3g: 20-60mL: 15-45mL: 50-70mL.

5. A fireproof board structure using calcium silicate board according to claim 1, characterized in that, In step A3, the intermediate product 2 solution is prepared by mixing intermediate product 2, ethanol and deionized water in a volume ratio of 0.02-0.04 mol: 50-70 mL: 4-8 mL.

6. The fireproof board structure using calcium silicate board according to claim 1, characterized in that, The base layer is made of calcium silicate board.

7. A fireproof board structure using calcium silicate board according to claim 1, characterized in that, The decorative layer comprises the following raw materials in parts by weight: 10-30 parts mullite, 15-25 parts silicate cement, 1-3 parts expanded perlite, 0.5-2 parts polyvinyl alcohol, 0.5-1 parts guar gum, 1-2 parts colorant, 0.5-0.8 parts silane coupling agent, and 13-16 parts water.

8. A fireproof board structure using calcium silicate board according to claim 1, characterized in that, The hollow glass microspheres are passed through a 250-300 mesh sieve and cleaned with deionized water.

9. A fireproof board structure using calcium silicate board according to claim 1, characterized in that, The bulk density of the vitrified microspheres is 80-120 kg / m³. 3 .

10. A method for manufacturing a fireproof board structure using calcium silicate board as described in any one of claims 1-9, characterized in that, The fireproof board structure using calcium silicate board is prepared by the following steps: Step S1: Weigh the fireproof layer raw materials according to the weight parts, mix silicate cement, quartz sand, quicklime, hollow glass microspheres, vitrified microspheres, microfibrillated cellulose and water, stir at 1400-1600 rpm for 12-17 minutes, then reduce the speed to 1000-1200 rpm, add modified basalt fiber, and continue stirring for 10-15 minutes to obtain the mixture; Step S2: Pour the mixture into a mold, vacuum filter until no water drips down after 10 seconds, remove it, hydraulically form, steam cure, and dry to obtain a fireproof layer. The working conditions for hydraulic forming are: pressure of 8 MPa and holding time of 8 min. The working conditions for steam curing are: steam pressure of 1.2 MPa, temperature of 165-170℃, and time of 10-12 h. Step S3: Weigh the decorative layer material according to the weight proportions, mix and stir evenly, then spread it in the mold. The thickness of the decorative layer is 5-10mm. Curing is carried out at room temperature to obtain the decorative layer. Step S4: Adhere one side of the fireproof layer to the calcium silicate board base layer and the other side to the decorative layer using phenolic resin. The viscosity of the phenolic resin is 4000-5000 mpa.s. After bonding, a fireproof board structure using calcium silicate board is obtained.

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