Low-carbon composite cement foamed ceramic thermal insulation board and preparation method thereof

Abstract

The application relates to the technical field of cement-based building materials, in particular to a low-carbon composite cement foamed ceramicized thermal insulation board and a preparation method thereof, which takes slag sulphoaluminate cement as a main material, matches white portland cement as a cementing material, adds amorphous calcium aluminate, a composite regulator, modified polyvinyl alcohol and hydrophobic fumed silica, and adds hydrogen peroxide as a foaming agent to prepare an A1-grade thermal insulation board which is light, high-strength and low-thermal-conductivity, and the indexes of which are all superior to the requirements of the I-type thermal insulation board specified in the existing JC / T2200-2013 'Cement-based Foamed Thermal Insulation Board'.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cement-based building materials, in particular to a low-carbon composite cement foamed ceramicized insulation board and a preparation method thereof. BACKGROUND

[0002] The A1 level (non-combustible level) fireproof insulation materials commonly used in the current building field mainly include cement-based chemical foaming insulation boards, cement-based physical foaming insulation boards, cement-based lightweight aggregate insulation boards, and rock wool, glass wool, etc.

[0003] Among them, the cement-based chemical foaming insulation board uses ordinary portland cement or sulphoaluminate cement as the base material, adds surfactants and functional additives, and forms a porous structure through the reaction of hydrogen peroxide, aluminum powder and other chemical foaming agents; the cement-based physical foaming board is a porous lightweight insulation board formed by mixing surfactants, cement slurry and auxiliary additive materials through mechanical foaming or air entraining.

[0004] The traditional chemical foaming insulation board generally faces the core technical contradiction that the physical strength and insulation effect cannot be considered.

[0005] According to JC / T2200-2013 "Cement-based Foamed Insulation Board", the I-type insulation board has a dry density of ≤180 kg / m 3 , a thermal conductivity of ≤0.055 W / (m·K), a compressive strength of ≥0.30 MPa, a volume water absorption of ≤10%, and a softening coefficient of ≥0.70; and according to CECS379:2014 "Sulphoaluminate Cement-based Foamed Insulation Board Exterior Wall External Insulation Engineering Technical Specification", the insulation board has a dry density of 140-180 kg / m 3 , a thermal conductivity of 0.050-0.058 W / (m·K), a compressive strength of 0.20-0.35 MPa, a volume water absorption of ≤10%, and a softening coefficient of ≥0.70.

[0006] However, with the increasing requirements of the state for building energy saving, low carbon and environmental protection, chemical foaming insulation materials with low dry density, good insulation performance, high compressive strength, low water absorption and good durability are urgently needed to be developed and put into engineering use.

[0007] Granulated blast furnace slag is an industrial solid waste produced in smelting engineering. The mineral powder prepared after grinding is widely used in cement-based materials as a mineral admixture. In order to realize high-value application of slag and reduce carbon emissions, slag sulphoaluminate cement has been studied in recent years. Some special cement manufacturers have applied for related patents, such as CN117567054A. The inventors have also conducted a large number of experiments on slag sulphoaluminate cement. Tangshan Polar Bear Building Material Co., Ltd. also jointly drafted the industry standard T / CCPA36-2022 "Slag Sulphoaluminate Cement" published by China Concrete and Cement Products Association. However, the high-value utilization of slag sulphoaluminate cement is still in the basic research stage. How to use slag sulphoaluminate cement to prepare insulation boards, while ensuring A1 fireproof performance, realizing the synergistic optimization of "light weight, high strength and low thermal conductivity", has become a key technical problem that needs to be broken through in the building materials industry, which has important practical significance for promoting building energy saving and consumption reduction and improving the reliability of the insulation system. SUMMARY

[0008] To solve the problems in the prior art, the present application provides a low-carbon composite cement foamed ceramic insulation board, which uses slag sulphoaluminate cement as the main material, white portland cement as the cementitious material, and adds amorphous calcium aluminate, composite regulator, modified polyvinyl alcohol and hydrophobic fumed silica, and hydrogen peroxide as a foaming agent to prepare A1 grade insulation boards with light weight, high strength and low thermal conductivity. All indicators are better than the requirements of I-type insulation boards in the existing JC / T2200-2013 "Cement-based Foam Insulation Board".

[0009] Specifically, the low-carbon composite cement foamed ceramic insulation board of the present application is composed of the following raw materials by weight: slag sulphoaluminate cement 67-75 parts, white portland cement 22-30 parts, amorphous calcium aluminate 1-3 parts, composite regulator 2.5-5.5 parts, modified polyvinyl alcohol 3.8-7.5 parts, hydrophobic fumed silica 6.5-10 parts, hydrogen peroxide 12.7-15.5 parts, and water 58-65 parts.

[0010] The present application selects slag sulphoaluminate cement and white portland cement as cementitious materials, which are matched with each other and added with amorphous calcium aluminate powder. Anhydrous sulphoaluminate and calcium sulphate in slag sulphoaluminate cement react rapidly after encountering water in the early stage, generating aluminum hydroxide and ettringite, which accelerates the setting time and hardening speed of the composite system. Amorphous calcium aluminate releases Al 3+The ions generate aluminum hydroxide after meeting water, the aluminum hydroxide is combined with calcium hydroxide and gypsum in white Portland cement and slag sulphoaluminate cement to generate ettringite, meanwhile, the high activity of amorphous calcium aluminate promotes the synergistic hydration of slag sulphoaluminate cement and white Portland cement, so that the hydration heat peak is advanced, and the total hydration heat is increased, with the continuous hydration reaction, the calcium hydroxide provided in the white Portland cement and the slag powder and gypsum in the slag sulphoaluminate cement further react, the active components Al2O3 and SiO2 in the slag are excited, the generated needle-shaped fine ettringite crystals and continuously generated C-S-H gel interweave with each other, fill the voids formed in the early hydration of the cement stone, the structure is more dense, and the strength continuously improves, the selection of the active material of the application can realize the high-value utilization of slag sulphoaluminate cement, and the hydration is promoted through mutual synergy, so that the mechanical properties of the board are ensured.

[0011] Preferably, the composite regulator is composed of ferric chloride, water, aluminum sulfate, cellulose ether, sodium dodecyl sulfate, and the mass ratio is 10:(50-100):(80-90):(6-8):(1-2).

[0012] Preferably, the modified polyvinyl alcohol is composed of polyvinyl alcohol, water, ethylene glycol, sodium benzoate, OP-10 and sodium hexametaphosphate, and the mass ratio is 10:(50-100):(1.5-3):(0.1-0.3):(0.1-0.2):(0.03-0.1).

[0013] The present application is a foaming system of a hydration system of slag sulphoaluminate cement, white Portland cement and amorphous calcium aluminate and hydrogen peroxide, through a large number of tests, the present application adds a composite regulator and modified polyvinyl alcohol to improve the stability of the foamed slurry, specifically, the ferric chloride in the composite regulator can be used as a catalyst for the decomposition of hydrogen peroxide, which improves the decomposition rate of hydrogen peroxide, and more importantly, promotes the early thickening of the composite system, the aluminum sulfate has the functions of thickening, rapid setting and early strength in the foaming process of the composite cementing material, which promotes the early setting and hardening speed and thickening and hardening time, the cellulose ether has good thickening and stable foaming functions, which improves the stability of the embryo in the foaming process, reduces the pore size of the foamed bubbles, and the sodium dodecyl sulfate reduces the surface tension in the foaming process, so that the bubbles generated in the reaction form small stable bubbles, and the bubble size and distribution are adjusted to improve the stability effect, the modified polyvinyl alcohol can be uniformly dispersed in the solution of the foamed slurry, and the PVA molecules formed can form a continuous film, which not only thickens the thickness of the bubble wall, improves the toughness of the bubble wall, reduces the water absorption rate, improves the waterproof performance, but also fills the skeleton gap between the bubbles, strengthens the interface strength of the bubbles, and improves the overall mechanical properties, the effective components in the composite regulator and the modified polyvinyl alcohol in the present application synergistically ensure that the foamed slurry formed by the slag sulphoaluminate cement, the white Portland cement and the amorphous calcium aluminate has good workability and volume stability, the bubbles are uniform and the pore wall has good toughness and hardening strength.

[0014] It is found in the test process of the present application that the use of commercially available polyvinyl alcohol emulsion directly will cause the foam to break, which seriously affects the foaming effect, and the reason is that the commercially available polyvinyl alcohol emulsion needs to add a defoaming agent to reduce the viscosity of the emulsion in the preparation process, and the present application uses polyvinyl alcohol, water, ethylene glycol, sodium benzoate, OP-10 and sodium hexametaphosphate to prepare modified polyvinyl alcohol, which has good use effect.

[0015] More importantly, the cementing material slurry composed of slag sulphoaluminate cement, white Portland cement and amorphous calcium aluminate is foamed by hydrogen peroxide, and under the stabilizing action of the composite regulator and the modified polyvinyl alcohol, the density of the foamed slurry is reduced to 100 kg / m 3 In order to further reduce the thermal conductivity, the present application adds hydrophobic fumed silica, which has a thermal conductivity of about 0.014 W / (m·K) at room temperature, a hydrophobic rate of ≥99%, and a close-packed density of 50-100 kg / m 3 The density of the slurry is similar, and the two can be integrated to further reduce the thermal conductivity.

[0016] Preferably, the slag sulphoaluminate cement has a strength grade of 52.5, and the appearance is white with a Hunter whiteness value of ≥92.

[0017] Preferably, the white Portland cement grade is 42.5 or 52.5, meeting the relevant requirements of GB / T 2015-2017 "White Portland Cement", and the Hunter whiteness value is greater than or equal to 93.

[0018] Preferably, the amorphous calcium aluminate has a Hunter whiteness value greater than or equal to 93.

[0019] Preferably, the preparation process of the composite regulator is as follows: uniformly mixing ferric chloride and water, uniformly mixing aluminum sulfate, cooling, uniformly mixing cellulose ether and sodium dodecyl sulfate, and obtaining the product. More preferably, the cooling is cooling to 20±2℃.

[0020] Preferably, the cellulose ether is at least one of hydroxypropyl methyl cellulose ether, hydroxyethyl cellulose ether and hydroxypropyl cellulose ether.

[0021] Preferably, the preparation process of the modified polyvinyl alcohol is as follows: heating and stirring polyvinyl alcohol and water, uniformly mixing ethylene glycol and sodium benzoate, cooling, and uniformly mixing OP-10 and sodium hexametaphosphate. More preferably, the heating and stirring is heating to 60-80℃, and the cooling is cooling to 20±2℃.

[0022] In the preparation process of the modified polyvinyl alcohol, polyvinyl alcohol and water are first heated and stirred to ensure that the polyvinyl alcohol powder is fully water-absorbed and swelled to form a uniform transparent mixed liquid, then ethylene glycol and sodium benzoate are added for modification, and finally OP-10 and sodium hexametaphosphate are added to reduce the viscosity of the solution, so that a transparent and stable polyvinyl alcohol emulsion is prepared without adding a defoaming agent.

[0023] Preferably, the concentration of hydrogen peroxide is 20-27.5%.

[0024] The calcium hydroxide generated by the hydration of the active substance provides an alkaline environment system, so that hydrogen peroxide decomposes to generate oxygen, thereby forming a porous lightweight insulation board. The slag sulphoaluminate cement in the present application, in combination with white Portland cement and amorphous calcium aluminate, has the characteristics of early setting and thickening and fast hardening in the slurry chemical foaming process. In combination with the composite regulator and the modified polyvinyl alcohol, the problems of settlement shrinkage and foam collapse caused by low cement dosage, long setting time, poor stability and weak support in the foaming process can be effectively avoided. Moreover, the strength continues to grow steadily in the later period, which is suitable for preparing lightweight high-strength insulation boards, and provides a matching material system for lightweight high-strength insulation boards. Furthermore, the Hunter whiteness value of the cementing material in the material system of the present application is greater than 90, and the prepared insulation board has good whiteness and porcelain decoration effect.

[0025] The present application also relates to a preparation method of the low-carbon composite cement foaming porcelain insulation board, comprising the following steps: weighing and uniformly mixing the raw materials according to the weight parts, and shaping and curing to obtain the product.

[0026] Preferably, the preparation method of the low-carbon composite cement foamed porcelain thermal insulation board of the present application comprises the following steps:

[0027] 1. The raw materials are weighed by weight parts,

[0028] 2. The slag sulphoaluminate cement, white portland cement and amorphous calcium aluminate are mixed uniformly, water is added and mixed uniformly to obtain a cementitious material slurry,

[0029] 3. The modified polyvinyl alcohol is sprayed on the hydrophobic fumed silica to obtain a coated material,

[0030] 4. The composite regulator and the coated material are added to the cementitious material slurry and mixed uniformly to obtain a porcelain slurry,

[0031] 5. The porcelain slurry is added to hydrogen peroxide, stirred and foamed, shaped, hardened, demolded, cured and cut to obtain the product.

[0032] In the preparation process of the present application, the prepared modified polyvinyl alcohol is sprayed on the hydrophobic fumed silica powder, which can not only avoid the uneven phenomenon in the stirring process due to the too light density of the dry powder, but also can make the modified polyvinyl alcohol liquid coat on the surface of the hydrophobic fumed silica powder, so that the combination is more sufficient and the reaction is more uniform in the stirring and dissolving process. The modified polyvinyl alcohol prepared by the present application has low viscosity and is very easy to coat and disperse on the surface of the hydrophobic fumed silica. In the preparation process of the modified polyvinyl alcohol, no defoaming agent is added, which effectively prevents the influence of the defoaming agent on the chemical foaming process due to the addition of the defoaming agent to reduce the viscosity and eliminate the surface tension in the preparation process of the traditional emulsion.

[0033] Of course, any raw material mixing method that can mix the raw materials uniformly also falls within the protection scope of the present application.

[0034] The present application has the following technical advantages:

[0035] 1. The present application uses slag sulphoaluminate cement as the main raw material, which is low-carbon and environmentally friendly, and realizes the high-value utilization of low-carbon cement,

[0036] 2. The thermal insulation board of the present application has the characteristics of light weight, high strength, low thermal conductivity and flame retardation,

[0037] 3. The thermal insulation board of the present application has high whiteness, good porcelain decoration effect and waterproof and durable performance. DETAILED DESCRIPTION

[0038] In order to characterize the technical effect of the present application, an insulation board is prepared and its performance is detected. In the test process, the strength grade of the slag sulphoaluminate cement is 52.5, which is produced by Tangshan Beizixiong Building Material Co., Ltd., the white portland cement is 52.5, which is produced by Albortland (Anqing) Co., Ltd., and the cellulose ether is selected from 40000 viscosity hydroxypropyl methyl cellulose ether produced by Bayer Company of Germany.

[0039] Example 1

[0040] The insulation board is composed of the following raw materials by weight: slag sulphoaluminate cement 68.5 parts, white portland cement 30 parts, amorphous calcium aluminate 1.5 parts, composite regulator 5.5 parts, modified polyvinyl alcohol 5.1 parts, hydrophobic fumed silica 8.5 parts, hydrogen peroxide 14.8 parts, and water 65 parts.

[0041] The composite regulator is composed of ferric chloride, water, aluminum sulfate, cellulose ether, and sodium dodecyl sulfate in a mass ratio of 10:90:85:6:2.

[0042] The modified polyvinyl alcohol is composed of polyvinyl alcohol, water, ethylene glycol, sodium benzoate, OP-10, and sodium hexametaphosphate in a mass ratio of 10:90:2:0.1:0.1:0.08.

[0043] After detection, the dry density of the insulation board is 68 kg / m 3 , the thermal conductivity is 0.032 W / (m·K), the compressive strength is 0.42 MPa, the volume water absorption is 1.0%, the softening coefficient is 0.86, the combustion performance is A1, and the whiteness value is 90.5.

[0044] Example 2

[0045] The insulation board is composed of the following raw materials by weight: slag sulphoaluminate cement 69.4 parts, white portland cement 25.7 parts, amorphous calcium aluminate 1.6 parts, composite regulator 4.2 parts, modified polyvinyl alcohol 5.2 parts, hydrophobic fumed silica 9.8 parts, hydrogen peroxide 13.6 parts, and water 62 parts.

[0046] The composite regulator is composed of ferric chloride, water, aluminum sulfate, cellulose ether, and sodium dodecyl sulfate in a mass ratio of 10:85:88:8:1.

[0047] The modified polyvinyl alcohol is composed of polyvinyl alcohol, water, ethylene glycol, sodium benzoate, OP-10, and sodium hexametaphosphate in a mass ratio of 10:95:1.5:0.25:0.15:0.05.

[0048] After detection, the dry density of the insulation board is 70 kg / m 3, the thermal conductivity is 0.034 W / (m·K), the compressive strength is 0.45 MPa, the volume water absorption is 0.8%, the softening coefficient is 0.90, the combustion performance is A1, and the whiteness value is 91.5.

[0049] Example 3

[0050] The insulation board is composed of the following weight parts of raw materials: slag sulphoaluminate cement 74.3 parts, white portland cement 23.2 parts, amorphous calcium aluminate 2.5 parts, composite regulator 5.2 parts, modified polyvinyl alcohol 7.5 parts, hydrophobic fumed silica 7.5 parts, hydrogen peroxide 13.1 parts, and water 60 parts,

[0051] The composite regulator is composed of ferric chloride, water, aluminum sulfate, cellulose ether, and sodium dodecyl sulfate in a mass ratio of 10:95:83:8:1.2,

[0052] The modified polyvinyl alcohol is composed of polyvinyl alcohol, water, ethylene glycol, sodium benzoate, OP-10, and sodium hexametaphosphate in a mass ratio of 10:90:2.4:0.2:0.2:0.03.

[0053] After detection, the dry density of the insulation board is 80 kg / m 3 , the thermal conductivity is 0.036 W / (m·K), the compressive strength is 0.52 MPa, the volume water absorption is 0.75%, the softening coefficient is 0.93, the combustion performance is A1, and the whiteness value is 92.5.

[0054] Comparative Example 1

[0055] The insulation board is composed of the following weight parts of raw materials: 52.5 grade sulphoaluminate cement 95.1 parts, amorphous calcium aluminate 1.6 parts, composite regulator 4.2 parts, modified polyvinyl alcohol 5.2 parts, hydrophobic fumed silica 9.8 parts, hydrogen peroxide 13.6 parts, and water 62 parts,

[0056] The composite regulator is composed of ferric chloride, water, aluminum sulfate, cellulose ether, and sodium dodecyl sulfate in a mass ratio of 10:85:88:8:1,

[0057] The modified polyvinyl alcohol is composed of polyvinyl alcohol, water, ethylene glycol, sodium benzoate, OP-10, and sodium hexametaphosphate in a mass ratio of 10:95:1.5:0.25:0.15:0.05.

[0058] After detection, the dry density of the insulation board is 180 kg / m 3 , the thermal conductivity is 0.065 W / (m·K), the compressive strength is 0.34 MPa, the volume water absorption is 28.5%, the softening coefficient is 0.52, and the combustion performance is A1.

[0059] Comparative Example 2

[0060] The insulation board is composed of the following raw materials by weight: 52.5 grade sulphoaluminate cement 69.4 parts, 42.5 grade ordinary portland cement 25.7 parts, amorphous calcium aluminate 1.6 parts, composite regulator 4.2 parts, modified polyvinyl alcohol 5.2 parts, hydrophobic fumed silica 9.8 parts, hydrogen peroxide 13.6 parts, and water 62 parts,

[0061] The composite regulator is composed of ferric chloride, water, aluminum sulfate, cellulose ether, and sodium dodecyl sulfate in a mass ratio of 10:85:88:8:1,

[0062] The modified polyvinyl alcohol is composed of polyvinyl alcohol, water, ethylene glycol, sodium benzoate, OP-10, and sodium hexametaphosphate in a mass ratio of 10:95:1.5:0.25:0.15:0.05.

[0063] After detection, the dry density of the insulation board is 175 kg / m 3 , the thermal conductivity is 0.061 W / (m·K), the compressive strength is 0.34 MPa, the volume water absorption is 31.8%, the softening coefficient is 0.66, and the combustion performance is A1.

[0064] Comparative Example 3

[0065] The insulation board is composed of the following raw materials by weight: slag sulphoaluminate cement 69.4 parts, white portland cement 25.7 parts, amorphous calcium aluminate 1.6 parts, composite regulator 4.2 parts, modified polyvinyl alcohol 5.2 parts, hydrophobic fumed silica 9.8 parts, hydrogen peroxide 13.6 parts, and water 62 parts,

[0066] The composite regulator is composed of ferric chloride, water, and cellulose ether in a mass ratio of 10:85:8,

[0067] The modified polyvinyl alcohol is composed of polyvinyl alcohol, water, ethylene glycol, sodium benzoate, OP-10, and sodium hexametaphosphate in a mass ratio of 10:95:1.5:0.25:0.15:0.05.

[0068] After detection, the dry density of the insulation board is 166 kg / m 3 , the thermal conductivity is 0.059 W / (m·K), the compressive strength is 0.26 MPa, the volume water absorption is 17.5%, the softening coefficient is 0.72, the combustion performance is A1, and the whiteness value is 90.8.

[0069] Comparative Example 4

[0070] The insulation board is composed of the following raw materials by weight: slag sulphoaluminate cement 69.4 parts, white portland cement 25.7 parts, amorphous calcium aluminate 3.6 parts, modified polyvinyl alcohol 7.4 parts, hydrophobic fumed silica 9.8 parts, hydrogen peroxide 13.6 parts, and water 62 parts,

[0071] The modified polyvinyl alcohol is composed of polyvinyl alcohol, water, ethylene glycol, sodium benzoate, OP-10, sodium hexametaphosphate in a mass ratio of 10:95:1.5:0.25:0.15:0.05.

[0072] The slurry collapses after foaming and shaping, and performance detection cannot be performed.

[0073] Comparative Example 5

[0074] The insulation board is composed of the following raw materials in parts by weight: slag sulphoaluminate cement 69.4 parts, white Portland cement 25.7 parts, amorphous calcium aluminate 3.6 parts, composite regulator 7.4 parts, hydrophobic fumed silica 9.8 parts, hydrogen peroxide 13.6 parts, and water 62 parts.

[0075] The composite regulator is composed of ferric chloride, water, aluminum sulfate, cellulose ether, and sodium dodecyl sulfate in a mass ratio of 10:85:88:8:1.

[0076] The slurry collapses after foaming and shaping, and performance detection cannot be performed.

[0077] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A low-carbon composite cement foamed ceramic insulation board, characterized in that, It is composed of the following raw materials in parts by weight: 67-75 parts slag sulfoaluminate cement, 22-30 parts white silicate cement, 1-3 parts amorphous calcium aluminate, 2.5-5.5 parts composite modifier, 3.8-7.5 parts modified polyvinyl alcohol, 6.5-10 parts hydrophobic fumed silica, 12.7-15.5 parts hydrogen peroxide, and 58-65 parts water. The composite regulator is composed of ferric chloride, water, aluminum sulfate, cellulose ether, and sodium dodecyl sulfate in a mass ratio of 10:(50-100):(80-90):(6-8):(1-2). The modified polyvinyl alcohol is composed of polyvinyl alcohol, water, ethylene glycol, sodium benzoate, OP-10, and sodium hexametaphosphate in a mass ratio of 10:(50-100):(1.5-3):(0.1-0.3):(0.1-0.2):(0.03-0.1). The preparation method of the low-carbon composite cement foamed ceramic insulation board includes the following steps: 1) Weigh each ingredient according to its weight. 2) Mix slag sulfoaluminate cement, white silicate cement, and amorphous calcium aluminate evenly, add water and mix thoroughly to obtain a cementitious slurry. 3) Modified polyvinyl alcohol is sprayed onto hydrophobic fumed silica to obtain a coating material. 4) Add the composite modifier and coating material to the cementitious slurry, mix thoroughly, and obtain the vitrified slurry. 5) Add the vitrified slurry to hydrogen peroxide, stir to foam, shape, harden, demold, cure, and cut to obtain the final product.

2. The low-carbon composite cement foamed vitrified insulation board according to claim 1, characterized in that, The strength grade of the slag sulfoaluminate cement is 52.

5.

3. The low-carbon composite cement foamed vitrified insulation board according to claim 1, characterized in that, The white silicate cement is grade 42.5 or 52.

5.

4. The low-carbon composite cement foamed vitrified insulation board according to claim 1, characterized in that, The preparation process of the composite regulator is as follows: ferric chloride and water are mixed evenly, aluminum sulfate is added and mixed evenly, cooled, cellulose ether and sodium dodecyl sulfate are added and mixed evenly to obtain the final product.

5. The low-carbon composite cement foamed vitrified insulation board according to claim 4, characterized in that, The cooling process involves reducing the temperature to 20±2℃.

6. The low-carbon composite cement foamed vitrified insulation board according to claim 4, characterized in that, The cellulose ether is at least one of hydroxypropyl methylcellulose ether, hydroxyethyl cellulose ether, and hydroxypropyl cellulose ether.

7. The low-carbon composite cement foamed vitrified insulation board according to claim 1, characterized in that, The modified polyvinyl alcohol preparation process is as follows: polyvinyl alcohol and water are heated and stirred, ethylene glycol and sodium benzoate are added and mixed evenly, the mixture is cooled, and OP-10 and sodium hexametaphosphate are added and mixed evenly to obtain the product.

8. The low-carbon composite cement foamed vitrified insulation board according to claim 7, characterized in that, The heating and stirring process involves heating to 60-80℃ and cooling to 20±2℃.

9. The low-carbon composite cement foamed vitrified insulation board according to claim 1, characterized in that, The hydrogen peroxide concentration is 20-27.5%.