A fireproof insulation board and its preparation method

Abstract

The present invention discloses a fireproof insulation board and a preparation method thereof, belonging to the technical field of fireproof insulation materials. First, the cement is modified, and then raw materials such as flame retardants and waterproof slurries are prepared. Finally, the blank of the insulation board is prepared by mixing, and then the blank is put into a mold to pour the waterproof slurry. After pouring, it is sealed and formed under heat preservation and pressure to obtain the fireproof insulation board. Through the above steps, not only the fireproof performance of the insulation board is improved, but also the waterproof, corrosion-resistant performance and strength of the insulation board are enhanced, thereby prolonging the service life of the insulation board.

Description

Technical Field

[0001] The present invention relates to the technical field of fireproof and heat-insulating materials, and particularly to a fireproof heat-insulating board and a preparation method thereof. Background Art

[0002] Exterior wall heat-insulating boards, which integrate functions such as heat insulation, waterproofing, and finishing, are preferred materials to meet the current energy-saving requirements of building construction and improve the exterior wall heat-insulation level of industrial and civil buildings. They are also the first choice for energy-saving renovation of existing buildings. With the in-depth development of building energy-saving work in China, a variety of heat-insulating and heat-preserving materials have emerged. However, the wall heat-insulating materials commonly used in China at present are extremely flammable. How to integrate excellent fireproof performance into heat-insulating materials is an urgent industry problem to be solved.

[0003] In order to improve the fireproof performance of heat-insulating boards, at present, many fireproof heat-insulating boards have emerged on the market, such as phenolic boards, real gold boards, composite magnesium silicate aluminum boards, vacuum adiabatic boards, extruded rock wool boards, and foamed cement heat-insulating boards. Foamed cement boards are non-toxic, harmless, low-cost, green and environmentally friendly, and are made of the same material as building walls, with the same expansion coefficient, and will not cause phenomena such as hollowing and cracking due to thermal expansion and contraction, and can meet the needs of exterior wall heat insulation, having great application potential. The existing foamed cement heat-insulating boards on the market, due to uneven technical levels and inconsistent quality, are prone to mold collapse, uneven bubble sizes, and uneven distributions during production, with a high defective rate, and have disadvantages such as high thermal conductivity, too low tensile strength and compressive strength, and being easily damaged and broken. At the same time, heat-insulating boards are often eroded by rainwater in daily life, which causes the performance of heat-insulating boards to decline after a long time of use, and even the heat-insulating boards are deformed and cracked. To solve the above problems, therefore, we need to find a heat-insulating board with remarkable heat-insulating effect, good tensile strength and compressive strength, good water resistance, and excellent fireproof performance. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a fireproof heat-insulating board and a preparation method thereof to solve the problems of poor fireproof performance, low tensile strength, low compressive strength, and poor water resistance of fireproof heat-insulating boards.

[0005] The present invention solves the above technical problems through the following technical means:

[0006] A fireproof heat-insulating board comprises the following raw materials: 30-60 parts by mass of modified cement, 5-10 parts by mass of diatomaceous earth, 20-40 parts by mass of flame retardant, 16-24 parts by mass of polystyrene particles, 1.1-1.5 parts by mass of hydrazine hydrate, and 20-30 parts by mass of waterproof slurry.

[0007] Further, the modified cement comprises the following raw materials: 40-50 parts by mass of Portland cement clinker, 10-20 parts by mass of fly ash, 3-6 parts by mass of vinyl bisstearamide, 0.02-0.1 parts by mass of glass fiber, 5-12 parts by mass of calcium lignosulfonate, 1-2 parts by mass of carbon nanotubes, 0.5-1 parts by mass of sodium cholate, 0.1-0.5 parts by mass of hydrazine hydrate, and 1-3 parts by mass of polyurethane.

[0008] Further, the flame retardant comprises the following raw materials: 10-20 parts by mass of polyurethane, 7-9 parts by mass of styrene-acrylic emulsion, and 15-25 parts by mass of magnesium sulfate.

[0009] Further, the flame retardant comprises the following raw materials: 15 parts by mass of polyurethane, 8 parts by mass of styrene-acrylic emulsion, and 20 parts by mass of magnesium sulfate.

[0010] Further, the waterproof slurry comprises the following raw materials: 2-4 parts by mass of calcium carbonate, 3-6 parts by mass of tributyl phosphate, 1-2 parts by mass of trisodium silicate, 3-6 parts by mass of cellulose, 30-60 parts by mass of sand and gravel aggregate, and 10-20 parts by mass of thermosetting resin.

[0011] Further, the waterproof slurry comprises the following raw materials: 3 parts by mass of calcium carbonate, 5 parts by mass of tributyl phosphate, 2 parts by mass of trisodium silicate, 5 parts by mass of cellulose, 45 parts by mass of sand and gravel aggregate, and 15 parts by mass of thermosetting resin.

[0012] Further, the thermosetting resin is epoxy resin.

[0013] A method for preparing a fireproof insulation board comprises the following steps:

[0014] (1) Add polystyrene particles, modified cement, flame retardant, hydrazine hydrate, and diatomite into water and stir, mix at a rate of 100-250 r / min for 5-8 min to obtain a mixture, and then add the mixture into a foaming machine to foam at a pressure of 0.05-0.1 MPa and a temperature of 105-120 °C for 1-2 min, and mix evenly to obtain a slurry;

[0015] (2) Invert the slurry in a molding machine for heat preservation and pressure molding for 6-9 h, wherein control the temperature in the molding machine to be 70-100 °C and the molding pressure to be 110-140 MPa to obtain a molded insulation board blank, demold the insulation board blank and cut it into the required size with an automatic vibrating cutting machine;

[0016] (3) Place the insulation board blank into an insulation board mold, pour the waterproof slurry, seal it after pouring and then calcine it, demold and trim the edges after molding to obtain the fireproof insulation board.

[0017] Further, the preparation steps of the modified cement are as follows:

[0018] (1) Add fly ash to water, stir at room temperature for 1 - 5 h at a stirring rate of 100 - 500 r / min, then add vinyl bisstearamide and carbon nanotubes and continue stirring. Heat in a water bath at 85 °C for 1 - 3 h, add glass fiber and calcium lignosulfonate and continue mixing and stirring to obtain a mixture.

[0019] (2) Dilute hydrazine hydrate 20 - 40 times with water, then mix it evenly with polyurethane, sodium cholate, and Portland cement clinker for foaming, and then add the mixture to obtain a modified cement.

[0020] When preparing the modified cement of the present invention, fly ash releases internal soluble SiO2 and Al2O3, and its network high polymers depolymerize into low - degree silicon - aluminum acid colloids. Adding vinyl bisstearamide and carbon nanotubes enables the polar amide groups and long carbon chain groups of the colloids, carbon nanotubes, and vinyl bisstearamide to bond. At the same time, the bridging effect that occurs will delay and prevent the expansion of micro - cracks in the mixture, reduce the micro - cracks caused by shrinkage and reduce their size, thereby achieving a toughening effect. Then add glass fiber and calcium lignosulfonate, through coupling treatment, and then foam to reduce the porosity of the mixture in the previous step, increase the effective area bearing the load. Polyurethane and sodium cholate can undergo a deblocking reaction under certain temperature conditions to release isocyanate groups, forming a tough adhesive film, and further improving the bonding strength between the mixtures, ultimately improving the strength, toughness, and thermal conductivity of the insulation board.

[0021] In the preparation process of the fire - proof insulation board, polystyrene particles are prepared by expanding and foaming polystyrene materials, containing a large number of closed air bubbles, with characteristics such as low thermal conductivity and non - water absorption, which can effectively improve the insulation performance and waterproof performance of the insulation board, and have excellent toughness. When subjected to external forces, they can absorb energy through elastic deformation, improving the compressive capacity and crack - resistance of the fire - proof insulation board. Diatomite plays a role in increasing the closed - cell rate and further improving the waterproof performance. The styrene - acrylic emulsion added with the flame retardant can enhance the compactness inside the cement, tightly seal the molecular voids, and improve the waterproofness of the cement, thereby preventing water penetration and cracking. The thermosetting resin and other raw materials in the waterproof slurry are mixed to form a thermosetting fire - proof structure, which quickly forms a honeycomb - like carbon layer structure after encountering fire. This carbon layer with a complex structure can block the decomposition gas and molten polymer from passing through, thereby producing a flame - retardant effect, which also improves the water resistance and strength of the fire - proof insulation board.

[0022] Combining the above materials makes the fire - proof insulation board prepared by the present invention have good insulation performance, excellent flame - retardant performance, and strong waterproof performance.

[0023] Beneficial effects:

[0024] (1) In the process of preparing the fireproof and heat-insulating board provided by the present invention, the cement is modified to further enhance the bonding degree between the heat-insulating boards. The prepared heat-insulating board has good heat-insulating performance, high strength, and excellent flame-retardant performance, and its combustion performance index can reach Class A.

[0025] (2) The fireproof and heat-insulating board prepared by the present invention has strong waterproof performance, which prolongs the service life of the heat-insulating board in actual application and is not easily damaged. Specific embodiments

[0026] The present invention will be described in detail below in conjunction with embodiments:

[0027] The present invention provides a fireproof and heat-insulating board and a preparation method thereof. However, before preparing the fireproof and heat-insulating board, modified cement needs to be prepared first. The raw materials of the modified cement prepared by the present invention are weighed according to the data in Table 1, and the carbon nanotubes are LG carbon nanotubes purchased from the market. The specific ratios are as follows:

[0028] Table 1 (unit: kg)

[0029]

[0030] Weigh the raw materials according to Table 1 to prepare modified cement. The preparation methods of Examples 1-3 and Comparative Examples 1-3 are as follows:

[0031] Example 1: Preparation of modified cement I

[0032] (1) Add fly ash to 8 kg of water, stir at room temperature for 3 h, the stirring rate is 300 r / min, then add vinyl bis-stearamide and carbon nanotubes and continue stirring, heat in a water bath at 85 °C for 2 h, add glass fiber and calcium lignosulfonate and continue mixing and stirring to obtain a mixture;

[0033] (2) Dilute hydrazine hydrate 30 times with water, then mix it evenly with polyurethane, sodium cholate and Portland cement clinker for foaming, and then add the mixture to mix to obtain modified cement.

[0034] Example 2: Preparation of modified cement II

[0035] (1) Add fly ash to 6 kg of water, stir at room temperature for 1 h, the stirring rate is 500 r / min, then add vinyl bis-stearamide and carbon nanotubes and continue stirring, heat in a water bath at 85 °C for 1 h, add glass fiber and calcium lignosulfonate and continue mixing and stirring to obtain a mixture;

[0036] (2) Dilute hydrazine hydrate 20 times with water, then mix it evenly with polyurethane, sodium cholate and Portland cement clinker for foaming, and then add the mixture to mix to obtain modified cement.

[0037] Example 3: Preparation of Modified Cement III

[0038] (1) Add fly ash to 10 kg of water, stir at room temperature for 5 h at a stirring rate of 100 r / min, then add vinyl bisstearamide and carbon nanotubes and continue stirring. Heat in a water bath at 85 °C for 3 h, and then add glass fiber and calcium lignosulfonate and continue mixing and stirring to obtain a mixture;

[0039] (2) Dilute hydrazine hydrate 40 times with water, then mix it evenly with polyurethane, sodium cholate and Portland cement clinker for foaming, and then add the mixture to obtain modified cement.

[0040] Comparative Example 1: Preparation of Modified Cement

[0041] The steps of Comparative Example 1 are the same as those of Example 1, except that polyurethane and sodium cholate are missing in step (1). The specific steps of step (2) are as follows:

[0042] (2) Dilute hydrazine hydrate 40 times with water for foaming, then add the mixture and Portland cement clinker and mix to obtain modified cement.

[0043] Comparative Example 2: Preparation of Modified Cement

[0044] The steps of Comparative Example 2 are the same as those of Example 1, except that vinyl bisstearamide and carbon nanotubes are missing in step (1). The specific steps of step (1) are as follows:

[0045] (1) Add fly ash to 8 kg of water, stir at room temperature for 3 h at a stirring rate of 300 r / min, heat in a water bath at 85 °C for 2 h, and then add glass fiber and calcium lignosulfonate and continue mixing and stirring to obtain a mixture.

[0046] Comparative Example 3: Preparation of Modified Cement

[0047] The steps of Comparative Example 3 are the same as those of Example 1, except that glass fiber and calcium lignosulfonate are missing in step (1). The specific steps of step (1) are as follows:

[0048] (1) Add fly ash to 8 kg of water, stir at room temperature for 3 h at a stirring rate of 300 r / min, then add vinyl bisstearamide and carbon nanotubes and continue stirring, heat in a water bath at 85 °C for 2 h to obtain a mixture.

[0049] Example 4: Flame Retardant

[0050] Mix 15 g of polyurethane, 8 g of styrene-acrylic emulsion and 20 g of magnesium sulfate to obtain a flame retardant.

[0051] Example 5: Waterproof Slurry

[0052] Mix 3 g of calcium carbonate, 5 g of tributyl phosphate, 2 g of trisodium silicate, 5 g of cellulose, 45 g of sand aggregate, and 15 g of thermosetting resin to obtain the waterproof slurry.

[0053] The raw materials for the fireproof and heat-insulating board prepared in the present invention are weighed according to the data in Table 2, and the specific proportions are as follows:

[0054] Table 2: (unit: kg)

[0055]

[0056] Weigh the raw materials according to Table 2 to prepare the fireproof and heat-insulating board.

[0057] Among them, the modified cement used in Examples 6-8 and Comparative Examples 6, 7, and 8 is derived from the modified cement prepared according to Example 1. The modified cement in Comparative Example 4 is directly replaced with fly ash, and no modified cement is added in Comparative Example 5. The flame retardants in Examples 6-8 and Comparative Examples 4-7 are all selected from the flame retardant prepared in Example 4, and the waterproof slurries are all selected from the waterproof slurry prepared in Example 5.

[0058] The preparation methods of Examples 6-8 and Comparative Examples 4-7 are as follows:

[0059] Example 6: Preparation of Fireproof and Heat-insulating Board I

[0060] (1) Add polystyrene particles, modified cement, flame retardant, hydrazine hydrate, and diatomaceous earth to water and stir. Mix at a rate of 175 r / min for 7 min to obtain a mixture, and then add the mixture to a foaming machine to foam at a pressure of 0.08 MPa and 113 °C for 2 min to obtain a uniformly mixed slurry;

[0061] (2) Invert the slurry in a molding machine and keep it warm and pressurized for molding for 8 h, where the temperature in the molding machine is controlled at 85 °C and the molding pressure is 125 MPa to obtain a molded heat-insulating board blank. Demold the heat-insulating board blank and cut it into the required size with an automatic vibrating cutting machine;

[0062] (3) Place the heat-insulating board blank into a heat-insulating board mold and pour the waterproof slurry. After pouring, seal it and calcine it. After molding, demold and trim the edges to obtain the fireproof and heat-insulating board.

[0063] Example 7: Preparation of Fireproof and Heat-insulating Board II

[0064] (1) Add polystyrene particles, modified cement, flame retardant, hydrazine hydrate, and diatomaceous earth to water and stir. Mix at a rate of 100 r / min for 8 min to obtain a mixture, and then add the mixture to a foaming machine to foam at a pressure of 0.05 MPa and 105 °C for 2 min to obtain a uniformly mixed slurry;

[0065] (2) Invert the slurry in a molding machine, keep it warm and apply pressure for 6 hours. Control the temperature in the molding machine at 100 °C and the molding pressure at 140 MPa to obtain a formed insulating board blank. Demold the insulating board blank and cut it into the required size with an automatic vibrating cutting machine;

[0066] (3) Place the insulating board blank into an insulating board mold, pour waterproof slurry, seal it after pouring and then calcine it. Demold and trim the edges after forming to obtain a fireproof insulating board.

[0067] Example 8: Preparation of Fireproof Insulating Board III

[0068] (1) Add polystyrene particles, modified cement, flame retardant, hydrazine hydrate, and diatomaceous earth into water and stir. Mix at a rate of 250 r / min for 5 minutes to obtain a mixture. Then add the mixture into a foaming machine and foam at a pressure of 0.1 MPa and 120 °C for 1 minute, and mix evenly to obtain a slurry;

[0069] (2) Invert the slurry in a molding machine, keep it warm and apply pressure for 9 hours. Control the temperature in the molding machine at 70 °C and the molding pressure at 110 MPa to obtain a formed insulating board blank. Demold the insulating board blank and cut it into the required size with an automatic vibrating cutting machine;

[0070] (3) Place the insulating board blank into an insulating board mold, pour waterproof slurry, seal it after pouring and then calcine it. Demold and trim the edges after forming to obtain a fireproof insulating board.

[0071] Comparative Example 4: Preparation of Fireproof Insulating Board

[0072] Steps (2) and (3) of Comparative Example 4 are the same as steps (2) and (3) of Example 4, only step (1) is different due to different raw materials. The specific step (1) is as follows:

[0073] (1) Add polystyrene particles, fly ash, flame retardant, hydrazine hydrate, and diatomaceous earth into water and stir. Mix at a rate of 175 r / min for 7 minutes to obtain a mixture. Then add the mixture into a foaming machine and foam at a pressure of 0.08 MPa and 113 °C for 2 minutes, and mix evenly to obtain a slurry.

[0074] Comparative Example 5: Preparation of Fireproof Insulating Board

[0075] Steps (2) and (3) of Comparative Example 5 are the same as steps (2) and (3) of Example 4, only step (1) is different due to different raw materials. The specific step (1) is as follows:

[0076] (1) Add polystyrene particles, flame retardant, hydrazine hydrate, and diatomaceous earth into water and stir. Mix at a rate of 175 r / min for 7 min to obtain a mixture. Then add the mixture into a foaming machine and foam at a pressure of 0.08 MPa and 113 °C for 2 min. Mix evenly to obtain a slurry.

[0077] Comparative Example 6: Preparation of fireproof insulation board

[0078] Steps (1) and (2) of Comparative Example 6 are the same as steps (1) and (2) of Example 4. Only step (3) is different due to different raw materials. The specific steps of step (3) are as follows:

[0079] (3) Place the insulation board blank into an insulation board mold, seal it, and then calcine. After molding, demold and trim the edges to obtain the fireproof insulation board.

[0080] Comparative Example 7: Preparation of fireproof insulation board

[0081] Steps (2) and (3) of Comparative Example 7 are the same as steps (2) and (3) of Example 4. Only step (1) is different due to different raw materials. The specific steps of step (1) are as follows:

[0082] (1) Add polystyrene particles, modified cement, hydrazine hydrate, and diatomaceous earth into water and stir. Mix at a rate of 175 r / min for 7 min to obtain a mixture. Then add the mixture into a foaming machine and foam at a pressure of 0.08 MPa and 113 °C for 2 min. Mix evenly to obtain a slurry.

[0083] Comparative Example 8: Preparation of fireproof insulation board

[0084] Steps (2) and (3) of Comparative Example 8 are the same as steps (2) and (3) of Example 4. Only step (1) is different due to different raw materials. The specific steps of step (1) are as follows:

[0085] (1) Add polystyrene particles, modified cement, and flame retardant into water and stir. Mix at a rate of 175 r / min for 7 min to obtain a mixture. Then add the mixture into a foaming machine and foam at a pressure of 0.08 MPa and 113 °C for 2 min. Mix evenly to obtain a slurry.

[0086] Experiment 1: Performance test of fireproof insulation board:

[0087] 1. Preparation method:

[0088] Experimental group: Experimental group 1 uses the preparation method of Example 6, where the modified cement is the modified cement prepared in Example 1;

[0089] Control group: The fireproof insulation boards prepared in Control groups 1-3 use the method of Example 6, but the modified cements are the modified cements prepared in Comparative Examples 1-3 respectively;

[0090] For the control groups 4 - 8, the fireproof insulation boards were prepared by the methods of Comparative Examples 4 - 8, and the modified cement used was the modified cement prepared in Example 1 for all of them.

[0091] 2. Specific experimental method:

[0092] Ninety cement insulation boards were divided into 9 groups, with 10 boards in each group. The fireproof insulation boards prepared in Experimental Group 1 and Comparative Groups 1 - 8 were selected for testing. Under the same standard, the fireproof grade, water absorption rate, tensile strength, compressive strength, and thermal conductivity of the insulation boards in each group were tested respectively, and the determination was carried out with reference to the test method standard of GB / T5486 - 2008. Each test was repeated three times and the average value was taken. The test results are shown in Table 3 below.

[0093] Table 3

[0094]

[0095]

[0096] 1. The thermal conductivity of Experimental Group 1 was 0.029, the fireproof grade reached non - combustible Class A, and the tensile strength, compressive strength, and water absorption rate of the insulation board were 0.22 MPa, 0.76 MPa, and 2.8% respectively. In Comparative Group 1, the modified cement lacked polyurethane and sodium cholate, and the thermal conductivity of the insulation board was 0.031, the fireproof grade reached non - combustible Class A, and the tensile strength, tensile strength, and water absorption rate of the insulation board decreased by 0.03 MPa, 0.06 MPa, and 0.3% respectively. In Comparative Group 2, the modified cement lacked vinyl bisstearamide and carbon nanotubes, which caused the tensile strength, compressive strength, and water absorption rate of the insulation board to decrease by 0.06 MPa, 0.12 MPa, and 0.6% respectively. It can be seen that in Example 4, the density and porosity of the material structure can be adjusted, making it easier to carry out subsequent reactions, thereby improving the performance.

[0097] 2. The modified cement in Comparative Group 3 did not add glass fiber and calcium lignosulfonate, and coupling treatment could not be carried out in the material to improve the problem of pore size. The thermal conductivity of the insulation board was 0.034, the fireproof grade reached non - combustible Class A, and the tensile strength, compressive strength, and water absorption rate of the insulation board decreased by 0.04 MPa, 0.08 MPa, and 0.4% respectively. It can be known that adding glass fiber and calcium lignosulfonate to the modified cement can improve the structure of the modified cement for the subsequent mixing preparation of the insulation board, and at the same time, the strength, toughness, and thermal conductivity of the insulation board can be improved to a certain extent.

[0098] 3. The thermal conductivity of the insulation board in Comparative Group 4 is 0.042, and the fire rating reaches the difficult-to-combust B1 level. The tensile strength, compressive strength, and water absorption rate of the insulation board decrease by 0.09 MPa, 0.26 MPa, and 2.4% respectively. The thermal conductivity of the insulation board in Comparative Group 5 is 0.048, and the fire rating reaches the difficult-to-combust B1 level. The tensile strength, compressive strength, and water absorption rate of the insulation board decrease by 0.1 MPa, 0.23 MPa, and 3.9% respectively. Modified cement prepared by the present invention was not added when preparing the fireproof insulation board in Comparative Group 5. It can be seen that adding the modified cement prepared by the present invention to the fireproof insulation board significantly improves the performance of the insulation board.

[0099] 4. The thermal conductivity of the insulation board in Comparative Group 6 is 0.04, and the fire rating reaches the non-combustible A level. The tensile strength, compressive strength, and water absorption rate of the insulation board decrease by 0.07 MPa, 0.21 MPa, and 1.8% respectively. The thermal conductivity of the insulation board in Comparative Group 7 is 0.039, and the fire rating reaches the non-combustible A level. The tensile strength, compressive strength, and water absorption rate of the insulation board decrease by 0.07 MPa, 0.18 MPa, and 1.8% respectively. The thermal conductivity of the insulation board in Comparative Group 8 is 0.037, and the fire rating reaches the non-combustible A level. The tensile strength, compressive strength, and water absorption rate of the insulation board decrease by 0.07 MPa, 0.15 MPa, and 1% respectively. Waterproof slurry was not used in Comparative Group 6, and the insulation board was directly prepared. There was no further melting of the flame retardant in Comparative Group 7. Therefore, the performance of the insulation board is inferior to the data of the experimental group. By mixing the insulation blank and the flame retardant and then pouring the waterproof slurry on the outer layer, the obtained insulation board has excellent fireproof performance and waterproof property.

[0100] The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention. The technologies, shapes, and structures not described in detail in the present invention are all well-known technologies.

Claims

1. A fireproof insulation board, characterized in that, It includes the following raw materials: 30-60 parts by mass of modified cement, 5-10 parts by mass of diatomite, 20-40 parts by mass of flame retardant, 16-24 parts by mass of polystyrene particles, 1.1-1.5 parts by mass of hydrazine hydrate, and 20-30 parts by mass of waterproof slurry; The modified cement includes the following raw materials: 40-50 parts by mass of Portland cement clinker, 10-20 parts by mass of fly ash, 3-6 parts by mass of vinyl bisstearamide, 0.02-0.1 parts by mass of glass fiber, 5-12 parts by mass of calcium lignosulfonate, 1-2 parts by mass of carbon nanotubes, 0.5-1 part by mass of sodium cholate, 0.1-0.5 parts by mass of hydrazine hydrate, and 1-3 parts by mass of polyurethane.

2. The fireproof and heat-insulating board according to claim 1, characterized in that, The flame retardant includes the following raw materials: 10-20 parts by mass of polyurethane, 7-9 parts by mass of styrene-acrylic emulsion, and 15-25 parts by mass of magnesium sulfate.

3. A fireproof insulation board according to claim 2, characterized in that, The flame retardant includes the following raw materials: 15 parts by mass of polyurethane, 8 parts by mass of styrene-acrylic emulsion, and 20 parts by mass of magnesium sulfate.

4. A fireproof insulation board according to claim 3, characterized in that, The waterproof slurry includes the following raw materials: 2-4 parts by mass of calcium carbonate, 3-6 parts by mass of tributyl phosphate, 1-2 parts by mass of trisodium silicate, 3-6 parts by mass of cellulose, 30-60 parts by mass of sand and gravel aggregate, and 10-20 parts by mass of thermosetting resin.

5. A fireproof insulation board according to claim 4, characterized in that, The waterproof slurry includes the following raw materials: 3 parts by mass of calcium carbonate, 5 parts by mass of tributyl phosphate, 2 parts by mass of trisodium silicate, 5 parts by mass of cellulose, 45 parts by mass of sand and gravel aggregate, and 15 parts by mass of thermosetting resin.

6. The preparation method of a fireproof and heat-insulating board according to claim 1, wherein, The method includes the following steps: (1) Add polystyrene particles, modified cement, flame retardant, hydrazine hydrate, and diatomite into water and stir at a rate of 100-250 r / min for 5-8 min to obtain a mixture. Then add the mixture into a foaming machine and foam at a pressure of 0.05-0.1 MPa and a temperature of 105-120 °C for 1-2 min, and mix evenly to obtain a slurry; (2) Invert the slurry in a molding machine and keep it warm and pressurized for 6-9 h, where the temperature in the molding machine is controlled at 70-100 °C and the molding pressure is 110-140 MPa to obtain a molded insulation board blank. Demold the insulation board blank and cut it into the required size with an automatic vibrating cutting machine; (3) Place the insulation board blank into an insulation board mold and pour the waterproof slurry. After pouring, seal it and calcine it. After molding, demold and trim the edges to obtain a fireproof and heat-insulating board.

7. The preparation method of a fireproof and heat-insulating board according to claim 6, characterized in that, The preparation steps of the modified cement are as follows: (1) Add fly ash into water, stir at room temperature for 1-5 h at a stirring rate of 100-500 r / min, then add vinyl bisstearamide and carbon nanotubes and continue stirring. Heat in a water bath at 85 °C for 1-3 h, and add glass fiber and calcium lignosulfonate and continue mixing and stirring to obtain a mixture; (2) Dilute hydrazine hydrate by 20-40 times, then mix it evenly with polyurethane, sodium cholate, and Portland cement clinker for foaming, and then add the mixture to obtain modified cement.

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