CN112645667A - Fireproof cement-based foaming insulation board prepared by utilizing coal gangue power plant solid waste and method - Google Patents
Fireproof cement-based foaming insulation board prepared by utilizing coal gangue power plant solid waste and method Download PDFInfo
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- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
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- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
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- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
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- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
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- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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Abstract
The invention relates to the technical field of building materials, in particular to a fireproof cement-based foaming insulation board prepared from coal gangue power plant solid wastes and a preparation method thereof. The insulation board takes a composite cementing material and a composite additive as raw materials; the composite cementing material comprises ordinary portland cement, coal gangue power plant fly ash and superfine sulphoaluminate cement; the composite additive comprises a pore structure regulator, an activity excitant, a retarder, a viscosity regulator, a waterproof agent, an anti-cracking component, a composite water reducing agent, a foaming synergist and a foaming agent. The cement-based foaming insulation board is prepared by taking ordinary portland cement, coal gangue power plant ash and sulphoaluminate cement as composite cementing materials, superfine coal gangue power plant furnace bottom slag as a pore structure regulator and other composite additives, and compared with the existing product, the foaming insulation board has the advantages of lower volume density, higher compressive strength, smaller heat conductivity coefficient and lower water absorption, and the combustion performance can reach the national A-level standard.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to a low-cost A-level fireproof cement-based foaming insulation board prepared from coal gangue power plant solid wastes and a preparation method thereof.
Background
Along with the green development of buildings in China, building energy-saving indexes become stricter and stricter, although the currently widely used polyphenyl organic insulation boards can meet the heat insulation requirements of buildings, the fire hazard of inflammable organic materials and the great loss of personal and property caused by the fire of many high-rise buildings continuously improve the double requirements of energy-saving heat insulation and fire prevention and flame retardance of buildings, and the energy conservation of the buildings is more and more emphasized by utilizing the natural non-combustible advantage of cement-based materials. The cement foaming insulation board is prepared from cement, mineral admixture, chemical admixture, foaming agent and the like through processes of compounding, stirring, foaming, cutting, waterproof treatment and the like, closed foam holes can be formed inside the foaming insulation board, the cement foaming insulation board has the properties of light weight, heat preservation, heat insulation and the like, the combustion performance can reach the national A-level standard, the national building energy-saving requirement is met, and meanwhile, the cement foaming insulation board has the advantages of being non-toxic, harmless and the like.
However, in order to compete with polystyrene board in the product market, the cement-based foamed insulation board needs to meet the performance indexes of insulation boards equivalent to polystyrene board, such as volume density less than 150kg/m3, thermal conductivity less than 0.05W/m · K, etc., which puts very strict requirements on the cement-based materials used for preparing the boards, resulting in higher cost. Patent ZL201310703099.7 "a superfine cement base foaming heated board and preparation method thereof" discloses a heat preservation panel that can reach the preparation of above-mentioned performance, and its cement substrate uses the superfine portland cement that specific surface area reaches 800m2/kg, and the high price of portland cement itself and extra superfine grinding processing cause this cement price to be usually more than 1000 yuan/ton for this type heated board cost is on the high side, and market competition is not strong.
Coal resources are rich in northern areas of China, the emission amount of coal gangue produced by coal mine mixed mining and washing processes is up to more than 3000 million tons every year, and the storage amount of the waste and buried gangue is far more than hundred million tons. The coal gangue with lower calorific value is used for combustion power generation, and is a main means for treating the solid waste of the gangue in the coal power industry. However, the coal gangue is different from high-quality coal used in a conventional coal-fired power plant, the content of non-coal components is high, a large amount of new solid wastes such as power plant ash and furnace bottom slag can still be generated after combustion, and the prior art is difficult to utilize on a large scale.
The combination of the utilization of the solid waste of the coal gangue power plant and the production of the high-performance cement-based foamed heat-insulation board is an advanced method for reducing the manufacturing cost of the cement foamed heat-insulation board, realizing the resource utilization of the solid waste, creating a green factory, promoting the energy conservation and emission reduction of the industry and the low-carbon emission, and has remarkable economic and social benefits.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention has a first object of providing a low-cost A-grade fireproof cement-based foaming insulation board prepared by utilizing coal gangue power plant solid wastes and a preparation method thereof, wherein the low-cost A-grade fireproof cement-based foaming insulation board is prepared by taking ordinary portland cement, coal gangue power plant ash and sulphoaluminate cement as composite cementing materials, superfine coal gangue power plant furnace bottom slag as a pore structure regulator and other composite additives, and compared with the existing product, the foaming insulation board has the advantages of lower volume density (about 120kg/m 3), higher compressive strength (not less than 0.25MPa), smaller heat conductivity coefficient (not more than 0.045W/m.K) and lower water absorption (not more than 6%), and the combustion performance can reach the national A-grade standard.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention discloses a fireproof cement-based foaming insulation board prepared by utilizing coal gangue power plant solid wastes, which is prepared by taking a composite cementing material and a composite additive as raw materials; the composite cementing material comprises the following components in percentage by mass in the whole raw materials: 50-65 parts of ordinary Portland cement, 30-40 parts of fly ash of a coal gangue power plant and 5-10 parts of superfine sulphoaluminate cement; the composite admixture comprises, by mass, 2-4.5% of a pore structure regulator, 5-8% of an activity exciting agent, 2.9-4.5% of a retarder, 0.05-0.2% of a viscosity regulator, 4-7% of a waterproof agent, 0.5-2% of an anti-cracking component, 0.5-0.8% of a composite water reducing agent, 5-8.5% of a foaming synergist and 8-11% of a foaming agent.
Preferably, the specific surface area of the ordinary portland cement is 330m2/kg～380m2Between/kg;
preferably, the specific surface area of the fly ash of the coal gangue power plant is 600m2/kg～700m2Between/kg;
preferably, the specific surface area of the superfine sulphoaluminate cement is 810m2/kg～830m2Between/kg;
preferably, the pore structure regulator is modified superfine coal gangue power plant bottom slag, and the specific surface area is 930-980 m2Between/kg;
preferably, the activity excitant is a mixture of stone powder, lime, gypsum, aluminum sulfate or lithium carbonate; the gypsum is preferably any one or the combination of at least two of natural dihydrate gypsum, natural anhydrite, hemihydrate gypsum, alpha high-strength gypsum, desulfurized gypsum, phosphogypsum or fluorgypsum.
The retarder is preferably one or a mixture of more than two of citric acid or sodium citrate.
The viscosity regulator of the present invention is preferably hydroxyethyl cellulose ether.
The waterproof agent is preferably one or a mixture of more than two of polymer emulsion or latex powder.
The anti-cracking component is preferably fiber, and more preferably one or a mixture of more than two of polypropylene fiber, polyvinyl alcohol fiber or polyethylene fiber.
The composite water reducing agent of the invention is preferably a mixture of a polycarboxylic acid water reducing agent and a melamine water reducing agent.
The foaming synergist is preferably ferric chloride solution.
The foaming agent is preferably hydrogen peroxide.
The invention also discloses a preparation method of the foaming insulation board, which mainly comprises the following steps:
step 1, adding mixing water into the composite cementing material, the pore structure regulator, the retarder, the viscosity regulator, the waterproof agent and the composite water reducing agent in the proportion, wherein the mass ratio of the mixing water in the composite cementing material is 28-35%; then stirring to form uniform slurry;
step 2, adding a certain amount of mixing water into the mixture of the stone powder, the lime, the desulfurized gypsum and the aluminum sulfate to enable the total water-cement ratio to reach 0.3-0.4, and uniformly stirring at a certain speed;
step 3, adding the anti-cracking component into the slurry obtained in the step 1, stirring, adding the slurry obtained in the step 2 during stirring, and continuing stirring;
step 4, adding the foaming synergist into the slurry obtained in the step 3, stirring for a certain time, adding the foaming agent, and continuing stirring;
and 5, pouring the slurry obtained in the step 4 into a mould, demoulding after foaming is finished and the base body reaches the target strength, and cutting the base body into the cement foaming insulation board according to the designed product size. And spraying a waterproof agent on the surface of the cut superfine cement foamed insulation board according to the requirement.
The invention has the advantages and positive effects that:
1. the invention is different from the existing cement-based foaming insulation board which needs to use superfine portland cement as a main base material, utilizes the high pozzolanic activity and the particle filling effect of the fly ash of the coal gangue power plant, compounds the fly ash with the ordinary portland cement in a large proportion, can achieve the strength grade of 72.5 in 28 days under the action of adding a small amount of an active exciting agent, and can completely replace the superfine portland cement, thereby obviously reducing the raw material cost of a cementing material.
2. The invention firstly provides a pore structure regulator taking modified ultrafine grinding coal gangue power plant furnace bottom slag as a cement-based foaming thermal insulation material, which can change the loose and porous surface structure of the coal gangue power plant furnace bottom slag, reduce the adsorption capacity of the coal gangue power plant furnace bottom slag on mixing water, reduce the adverse effect of the coal gangue power plant furnace bottom slag on the product workability, change the surface tension of newly mixed cement slurry, and improve the proportion of closed pores of a foaming thermal insulation board, thereby reducing the thermal conductivity of the thermal insulation board, and on the other hand, improving the utilization rate of solid waste of the coal gangue power plant.
The foaming insulation board can achieve the following performances: the bulk density is less than or equal to 130kg/m3The compression strength is more than or equal to 0.25MPa, the heat conductivity coefficient is less than or equal to 0.045W/m.K, the water absorption rate is less than or equal to 6 percent, the composite material has the characteristics of ultralight weight, high efficiency and the like, and achieves the A-grade preventionThe performance requirement of the fire foaming insulation board.
In a word, the invention takes the low-value solid waste of the coal gangue power plant as the raw material, and utilizes the 2 technologies to carry out base material compounding and modification, thereby realizing the preparation of the cement-based foaming insulation board by replacing high-cost superfine portland cement with industrial solid waste with large mixing amount, obviously reducing the material cost, improving the competitiveness of insulation board enterprises, and simultaneously providing a new method for the comprehensive utilization of the coal-electricity solid waste.
Detailed Description
The following will incorporate embodiments of the present invention; the technical scheme in the embodiment of the invention is clearly and completely described; obviously; the described embodiments are only some of the embodiments of the invention; rather than all embodiments. Based on the embodiments of the invention; all other embodiments obtained by a person skilled in the art without making any inventive step; all fall within the scope of protection of the present invention.
The following detailed description is made on the preparation method of the insulation board through several embodiments:
example 1
A fireproof cement-based foaming insulation board prepared by utilizing solid waste of a coal gangue power plant is characterized in that a cement base material is prepared by mixing a composite cementing material and a composite additive; wherein the composite cementing material consists of 50 parts by mass of material with a specific surface area of about 370m2Per kg of ordinary Portland cement, 40 parts by mass of a specific surface area of about 690m2Per kg coal gangue power plant fly ash and 10 parts by mass of specific surface area about 840m2/kg of superfine sulphoaluminate cement; the composite admixture is composed of 4.5% of pore structure regulator (modified ultra-fine bottom slag with a specific surface area of about 930 m) by mass in the composite cementing material2The concrete comprises the following components of, by weight, 8% of an activity exciting agent (a mixture of mountain flour, lime, desulfurized gypsum and aluminum sulfate), 4.5% of a retarder (sodium citrate), 0.05% of a viscosity regulator (hydroxyethyl cellulose ether), 6.9% of a waterproof agent (polymer emulsion), 0.80% of a cracking-resistant component (polypropylene fiber) and 0.53% of a composite water reducing agent (consisting of a polycarboxylic acid water reducing agent and a melamine water reducing agent).
The preparation method of the foaming insulation board in the embodiment comprises the following steps:
step 1, adding mixing water into the composite cementing material, the pore structure regulator, the retarder, the viscosity regulator, the waterproof agent and the composite water reducing agent in the proportion, wherein the mass ratio of the mixing water in the composite cementing material is 34.2%; then, the mixture is stirred at the speed of 145r/min for 30s at a low speed, and then is stirred at the speed of 245r/min for 60s at a high speed to form uniform slurry;
step 2, adding a mixture of stone powder, lime, desulfurized gypsum and aluminum sulfate in a mass ratio of 4:2:3:1 into the residual mixing water, wherein the mass ratio of the mixing water in the composite cementing material is 3.8% in order to enable the water-cement ratio to reach 0.38, and slowly stirring for 60s at a speed of 145 r/min;
step 3, adding the anti-cracking component (polypropylene fiber) into the slurry obtained in the step 1, slowly stirring for 30s at the speed of 145r/min, simultaneously adding the slurry obtained in the step 2, and rapidly stirring for 60s at the speed of 245 r/min;
step 4, adding 5.3% of foaming synergist into the slurry obtained in the step 3, stirring for 15s, then adding 8.5% of foaming agent, and stirring for 20 s;
and 5, pouring the slurry obtained in the step 4 into a mould, demoulding after foaming is finished and the base body reaches the target strength, and cutting the base body into the cement foaming insulation board according to the designed product size. And spraying a waterproof agent on the surface of the cut superfine cement foamed insulation board according to the requirement.
Example 2:
in the embodiment, the cement base material of the fireproof cement-based foaming insulation board prepared by utilizing the solid waste of the coal gangue power plant is obtained by mixing a composite cementing material and a composite additive; wherein the composite cementing material consists of 57 parts by mass of material with the specific surface area of about 360m2Per kg of ordinary Portland cement, 35 parts by mass of which the specific surface area is about 660m2Per kg coal gangue power plant fly ash and 8 parts by mass of fly ash with specific surface area of about 830m2/kg of superfine sulphoaluminate cement; the composite admixture has 3.5 percent of specific surface area of about 980m in mass percentage in the composite cementing material2Perkg of pore structure regulator (modified superfine furnace bottom slag) and 6.5 percent of activity excitant(mixture of stone powder, lime, anhydrite and lithium carbonate), 3.5 percent of retarder (citric acid), 0.15 percent of viscosity regulator (hydroxyethyl cellulose ether), 5.5 percent of waterproofing agent (latex powder), 1.5 percent of anti-cracking component (polyvinyl alcohol fiber) and 0.66 percent of composite water reducing agent (consisting of polycarboxylic acid water reducing agent and melamine water reducing agent) by mixing.
The preparation method of the foaming insulation board in the embodiment comprises the following steps:
step 1, adding mixing water into the composite cementing material, the pore structure regulator, the retarder, the viscosity regulator, the waterproof agent and the composite water reducing agent in the proportion, wherein the mass ratio of the mixing water in the composite cementing material is 31.5%; then, the mixture is stirred at the speed of 145r/min for 30s at a low speed, and then is stirred at the speed of 245r/min for 60s at a high speed to form uniform slurry;
step 2, adding the mixture of stone powder, lime, desulfurized gypsum and aluminum sulfate with the mass ratio of 5:1.5:2:1.5 into the residual mixing water, wherein the mass ratio of the mixing water in the composite cementing material is 3.5% in order to enable the water-cement ratio to reach 0.35, and slowly stirring for 60s at the speed of 145 r/min;
step 3, adding the anti-cracking component into the slurry obtained in the step 1, stirring at a low speed of 145r/min for 30s, simultaneously adding the slurry obtained in the step 2, and quickly stirring at a speed of 245r/min for 60 s;
step 4, adding 6.9% of foaming synergist into the slurry obtained in the step 3, stirring for 15s, adding 9.2% of foaming agent, and stirring for 20 s;
and 5, pouring the slurry obtained in the step 4 into a mould, demoulding after foaming is finished and the base body reaches the target strength, and cutting the base body into the cement foaming insulation board according to the designed product size. And spraying a waterproof agent on the surface of the cut superfine cement foamed insulation board according to the requirement.
Example 3:
in the embodiment, the cement base material of the fireproof cement-based foaming insulation board prepared by utilizing the solid waste of the coal gangue power plant is obtained by mixing a composite cementing material and a composite additive; wherein the composite cementing material consists of 65 parts by mass of material with the specific surface area of about 340m2Per kg of ordinary portland cement,30 parts by mass of a specific surface area of about 620m2Per kg coal gangue power plant fly ash and 5 parts by mass of specific surface area about 810m2/kg of superfine sulphoaluminate cement; the composite admixture has 2 percent of specific surface area of about 960m in mass percentage in the composite cementing material2The material is prepared by mixing a pore structure regulator (modified superfine furnace bottom slag), 5% of an activity exciting agent (a mixture of stone powder, lime, dihydrate gypsum and aluminum sulfate), 2.9% of a retarder (a mixture of citric acid and sodium citrate), 0.18% of a viscosity regulator (hydroxyethyl cellulose ether), 4.1% of a waterproof agent (consisting of polymer emulsion and latex powder), 0.80% of an anti-cracking component (polyethylene fiber) and 0.78% of a composite water reducing agent (consisting of a polycarboxylic acid water reducing agent and a melamine water reducing agent).
The preparation method of the foaming insulation board in the embodiment comprises the following steps:
step 1, adding mixing water into the composite cementing material, the pore structure regulator, the retarder, the viscosity regulator, the waterproof agent and the composite water reducing agent in the proportion, wherein the mass ratio of the mixing water in the composite cementing material is 28.8%; then, the mixture is stirred at the speed of 145r/min for 30s at a low speed, and then is stirred at the speed of 245r/min for 60s at a high speed to form uniform slurry;
step 2, adding the mixture of the stone powder, the lime, the desulfurized gypsum and the aluminum sulfate in a mass ratio of 5:1:3:1 into the residual mixing water, wherein the mass ratio of the mixing water in the composite cementing material in the step is 3.2% so as to enable the water-cement ratio to reach 0.32, and slowly stirring for 60s at a speed of 145 r/min;
step 3, adding the anti-cracking component into the slurry obtained in the step 1, stirring at a low speed of 145r/min for 30s, simultaneously adding the slurry obtained in the step 2, and quickly stirring at a speed of 245r/min for 60 s;
step 4, adding 8.3% of foaming synergist into the slurry obtained in the step 3, stirring for 15s, adding 10.7% of foaming agent, and stirring for 20 s;
and 5, pouring the slurry obtained in the step 4 into a mould, demoulding after foaming is finished and the base body reaches the target strength, and cutting the base body into the cement foaming insulation board according to the designed product size. And spraying a waterproof agent on the surface of the cut superfine cement foamed insulation board according to the requirement.
The results of the performance tests for each example are shown in the following table:
| numbering | Bulk density kg/m3 | Compressive strength MPa | Coefficient of thermal conductivity W/m.K | Volume water absorption% |
| Example 1 | 124 | 0.268 | 0.045 | 5.9 |
| Example 2 | 122 | 0.265 | 0.044 | 5.8 |
| Example 3 | 118 | 0.252 | 0.044 | 6.0 |
As can be seen from the above table, the foamed insulation board of the present invention can achieve the following properties: the bulk density is less than or equal to 130kg/m3The compression strength is more than or equal to 0.25MPa, the heat conductivity coefficient is less than or equal to 0.045W/m.K, the water absorption rate is less than or equal to 6 percent, the fireproof foam insulation board has the characteristics of ultralight weight, high efficiency and the like, and meets the performance requirements of the A-grade fireproof foam insulation board.
The principle of the cement-based foaming insulation board prepared by utilizing the solid waste of the coal gangue power plant is as follows: the invention utilizes the high pozzolanic activity and the particle filling effect of the fly ash of the coal gangue power plant to compound with the ordinary portland cement in a large proportion, the strength can reach 72.5 strength grade in 28 days under the action of adding a small amount of the active excitant, and the fly ash can completely replace the superfine portland cement, thereby obviously reducing the raw material cost of the cementing material. The modifier is used as a pore structure regulator after ultrafine grinding is carried out on the furnace bottom slag of the coal gangue power plant, so that the loose and porous surface structure of the coal gangue power plant is changed, the adsorption capacity of the coal gangue power plant to mixing water is reduced, the adverse effect of the coal gangue power plant on the workability of the coal gangue power plant is reduced, the surface tension of freshly mixed cement slurry can be changed, the proportion of closed pores of the foamed insulation board is improved, and the heat conductivity coefficient of the insulation board is reduced.
The embodiments of the present invention have been described in detail, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (10)
1. The utility model provides an utilize fire prevention cement base foaming heated board of useless preparation admittedly of gangue power plant which characterized in that: the insulation board is prepared by taking a composite cementing material and a composite additive as raw materials; the composite cementing material comprises the following components in percentage by mass in the whole raw materials: 50-65 parts of ordinary Portland cement, 30-40 parts of fly ash of a coal gangue power plant and 5-10 parts of superfine sulphoaluminate cement;
the composite admixture comprises, by mass, 2-4.5% of a pore structure regulator, 5-8% of an activity exciting agent, 2.9-4.5% of a retarder, 0.05-0.2% of a viscosity regulator, 4-7% of a waterproof agent, 0.5-2% of an anti-cracking component, 0.5-0.8% of a composite water reducing agent, 5-8.5% of a foaming synergist and 8-11% of a foaming agent.
2. The fireproof cement-based foaming insulation board prepared by utilizing the coal gangue power plant solid waste as claimed in claim 1, is characterized in that: the specific surface area of the ordinary portland cement is 330m2/kg～380m2Between/kg.
3. The fireproof cement-based foaming insulation board prepared by utilizing the coal gangue power plant solid waste as claimed in claim 1, is characterized in that: the specific surface area of the fly ash of the coal gangue power plant is 600m2/kg～700m2Between/kg.
4. The fireproof cement-based foaming insulation board prepared by utilizing the coal gangue power plant solid waste as claimed in claim 1, is characterized in that: the specific surface area of the superfine sulphoaluminate cement is 810m2/kg～830m2Between/kg.
5. The fireproof cement-based foaming insulation board prepared by utilizing the coal gangue power plant solid waste as claimed in claim 1, is characterized in that: the pore structure regulator is modified superfine coal gangue power plant bottom slag, and the specific surface area is 930-980 m2Between/kg.
6. The fireproof cement-based foaming insulation board prepared by utilizing the coal gangue power plant solid waste as claimed in claim 1, is characterized in that: the activity excitant is a mixture of mountain flour, lime, gypsum, aluminum sulfate or lithium carbonate.
7. The fireproof cement-based foaming insulation board prepared by utilizing the coal gangue power plant solid waste as claimed in claim 1, is characterized in that: the gypsum is preferably any one or the combination of at least two of natural dihydrate gypsum, natural anhydrite, hemihydrate gypsum, alpha high-strength gypsum, desulfurized gypsum, phosphogypsum or fluorgypsum.
8. The fireproof cement-based foaming insulation board prepared by utilizing the coal gangue power plant solid waste as claimed in claim 1, is characterized in that: the anti-cracking component is one or a mixture of more than two of polypropylene fibers, polyvinyl alcohol fibers or polyethylene fibers.
9. The fireproof cement-based foaming insulation board prepared by utilizing the coal gangue power plant solid waste as claimed in claim 1, is characterized in that: the retarder is one or a mixture of more than two of citric acid or sodium citrate;
and/or the viscosity regulator is hydroxyethyl cellulose ether;
and/or the waterproof agent is one or a mixture of more than two of polymer emulsion or latex powder;
and/or the anti-cracking component is one or a mixture of more than two of polypropylene fibers, polyvinyl alcohol fibers or polyethylene fibers;
and/or the composite water reducing agent is a mixture of a polycarboxylic acid water reducing agent and a melamine water reducing agent;
and/or the foaming synergist is ferric chloride solution.
10. The preparation method of the fireproof cement-based foaming insulation board prepared by utilizing the coal gangue power plant solid wastes as defined in any one of claims 1 to 9, is characterized by mainly comprising the following steps:
step 1, adding mixing water into the composite cementing material, the pore structure regulator, the retarder, the viscosity regulator, the waterproof agent and the composite water reducing agent in the proportion, wherein the mass ratio of the mixing water in the composite cementing material is 28-35%; then stirring to form uniform slurry;
step 2, adding a certain amount of mixing water into the mixture of the stone powder, the lime, the desulfurized gypsum and the aluminum sulfate to enable the total water-cement ratio to reach 0.3-0.4, and uniformly stirring at a certain speed;
step 3, adding the anti-cracking component into the slurry obtained in the step 1, stirring, adding the slurry obtained in the step 2 during stirring, and continuing stirring;
step 4, adding the foaming synergist into the slurry obtained in the step 3, stirring for a certain time, adding the foaming agent, and continuing stirring;
and 5, pouring the slurry obtained in the step 4 into a mould, demoulding after foaming is finished and the base body reaches the target strength, and cutting the base body into the cement foaming insulation board according to the designed product size. And spraying a waterproof agent on the surface of the cut superfine cement foamed insulation board according to the requirement.
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