CN116120093A - Heat insulation wallboard and production method thereof - Google Patents
Heat insulation wallboard and production method thereof Download PDFInfo
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- CN116120093A CN116120093A CN202310137482.4A CN202310137482A CN116120093A CN 116120093 A CN116120093 A CN 116120093A CN 202310137482 A CN202310137482 A CN 202310137482A CN 116120093 A CN116120093 A CN 116120093A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/40—Porous or lightweight materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention provides a heat-insulating wallboard and a production method thereof. The heat-insulating wallboard is characterized by comprising the following raw materials in parts by weight: 43-62 parts of cement, 32-47 parts of foamed ceramic, 10-13 parts of sand grains, 5-11 parts of fly ash particles, 0.14-0.3 part of foam stabilizer, 6-15 parts of foaming agent and 0.2-0.5 part of water reducer; the foamed ceramic is prepared by using starch curing and foaming methods, waste ceramic is used as aggregate, foaming and cement curing methods are used for preparing the foamed ceramic, the cost is reduced, the emission is reduced, the heat conductivity coefficient of a product prepared by adopting a method that foaming liquid is firstly independently foamed and then mixed with slurry is lower, the strength of the heat insulation board is improved, and meanwhile, the size of cells of the heat insulation board is increased, and the heat insulation performance is better.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to a heat insulation wallboard and a production method thereof.
Background
At present, heat insulation materials used for external wall heat insulation are mainly divided into two main types, namely inorganic heat insulation materials and organic heat insulation materials, but the materials have the defect that energy conservation and fire prevention cannot be achieved. The organic material is poor in heat resistance and easy to burn, releases a large amount of heat during burning, generates a large amount of toxic smoke, can accelerate the spreading of strong fire, and is easy to cause casualties of trapped personnel and rescue workers. Once the fire is encountered, the fire can burn quickly, and the condition of drop melting is easy to generate, so that the fire can accelerate or spread. The inorganic material has the accident that the whole heat preservation layer falls off due to low tensile strength, thereby causing personnel and financial loss.
The foamed ceramic heat-insulating board is used as one of the heat-insulating materials for the outer wall of the building in a large amount. However, the unsintered glazed foamed ceramic heat-insulating board belongs to one of the foamed ceramic heat-insulating boards, and when the insulating board is applied to the heat insulation of the building outer wall, the surface of the unsintered glazed foamed ceramic heat-insulating board is coated with the coating as a decorative surface layer. The main raw material of the non-sintered glazed foamed ceramic insulation board is ceramic powder, and then the ceramic powder is foamed and molded to obtain a closed-pore ceramic material with high porosity, so that the sintered glazed foamed ceramic insulation board has the problems of high cost, poor insulation effect and high heat conductivity.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a production method of a heat insulation wallboard, which aims to solve the problems of poor heat insulation effect and high heat conductivity of the heat insulation wallboard in the prior art.
One embodiment of the invention provides a heat-insulating wallboard. The heat-insulating wallboard comprises the following raw materials in parts by weight:
43-62 parts of cement, 32-47 parts of foamed ceramic, 10-13 parts of sand grains, 5-11 parts of fly ash particles, 0.14-0.3 part of foam stabilizer, 6-15 parts of foaming agent and 0.2-0.5 part of water reducer;
the fly ash particles are prepared by the following steps:
adding the fly ash into a ball mill, performing ball milling for 3-4min, adding a surfactant and polypropylene fibers, stirring and foaming for 1-2h to obtain a dispersion, adding the cooked cement slurry, stirring at the rotating speed of 950-980r/min, performing vacuum defoaming, pouring into a mould, and curing to obtain the fly ash particles.
Further, the dosage ratio of the fly ash, the surfactant and the polypropylene fiber is 1g to 1mL to 3.8g.
In one embodiment, the mass ratio of the ceramic powder to the starch is 10-12:1-1.6.
In one embodiment, the foamed ceramic is prepared by the steps of:
crushing the waste ceramic to obtain ceramic powder, ball-milling the ceramic powder, starch, a foam stabilizer and a dispersing agent with water for 20-30min, adding a foaming agent, stirring for 35-44min, homogenizing under high pressure of 10-15MPa for 40-50s, pouring into a mold, transferring into a baking oven with the temperature of 75-86 ℃ for heat preservation for 2-3h, transferring into the baking oven for drying for 2-3d, performing primary sintering, preserving heat for 2-3h, performing secondary sintering, and preserving heat for 1-1.5h to obtain the foamed ceramic.
In one embodiment, the dispersant is one or more of sodium stearate, ammonium polyacrylate, carboxylate, and sulfonate.
In one embodiment, the water reducer is one or more of a polycarboxylate water reducer and a melamine water reducer.
In one embodiment, the inner side of the wallboard is further provided with a wood fiber board, and the wood fiber board is obtained by processing natural renewable wood and corn stalks.
In one embodiment, the wood fiber board has a density of 200-270Kg/m 3 The thickness of the wood fiber board is 20-35mm.
In one embodiment, the temperature of the first sintering is 550-620 ℃.
In one embodiment, the second sintering is performed at a temperature of 1650-1770 ℃.
One embodiment of the invention also provides a production method of the heat insulation wallboard, which comprises the following steps:
s1, stirring and mixing cement, foamed ceramics, sand grains and fly ash particles for 2-6min under the condition that the rotating speed of the particles is 500-800r/min, then adding water reducing agent, foam stabilizer and foaming agent, continuously stirring for 3-5min under the condition that the temperature is 60 ℃, and then carrying out ultrasonic treatment for 20-30min under the condition that the frequency is 25-30kHz to obtain a mixture;
s2, placing the mixture into a wallboard mold, pouring and shaping, demolding, bonding the surface of the mixture with a wood fiber board, and air-drying the mixture under the constant-temperature environment condition of 25-27 ℃ to obtain the heat-insulating wallboard.
The heat insulation wallboard and the production method thereof have the following beneficial effects:
the pulverized coal ash is ball-milled, so that the adverse effects of carbon particles, porous glass bodies and various adhesive bodies with large water demand and loose structure are weakened or eliminated, the overall homogeneity and particle grading of the pulverized coal ash are improved after the pulverized coal ash is milled, obvious scratches are formed on the surface of the milled pulverized coal ash, the roughness is increased, and the surface active points are increased; the silicon, aluminum and calcium on the particle surface are uniformly distributed, the soluble silicon oxide and aluminum oxide are increased, and the finely ground fly ash consumes more calcium hydroxide in the pozzolan reaction process due to the activity enhancement of the soluble silicon oxide and aluminum oxide, so that the cement hydration reaction balance is broken, and the cement hydration reaction is promoted; meanwhile, the foamed ceramic is prepared by using a starch curing and foaming method, waste ceramic is used as aggregate, the foamed ceramic is prepared by using foaming and cement curing methods, the cost is reduced, the emission is reduced, the heat conductivity coefficient of a product prepared by adopting a method that foaming liquid is firstly independently foamed and then mixed with slurry is lower, the strength of the heat insulation board is improved, and meanwhile, the size of cells of the heat insulation board is increased, and the heat insulation performance is better.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, if a directional indication (such as up, down, left, right, front, and rear … …) is involved in the embodiment of the present invention, the directional indication is merely used to explain the relative positional relationship, movement condition, etc. between the components in a specific posture, and if the specific posture is changed, the directional indication is correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, if "and/or" and/or "are used throughout, the meaning includes three parallel schemes, for example," a and/or B "including a scheme, or B scheme, or a scheme where a and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
Example 1
The heat-insulating wallboard comprises the following raw materials in parts by weight:
43 parts of cement, 32 parts of foamed ceramic, 10 parts of sand grains, 5 parts of fly ash particles, 0.14 part of foam stabilizer, 6 parts of foaming agent and 0.2 part of water reducer;
the fly ash particles are prepared by the following steps:
adding the fly ash into a ball mill, performing ball milling for 3min, adding a surfactant and polypropylene fibers, stirring and foaming for 1h to obtain a dispersion, adding the cooked cement slurry, stirring at the rotating speed of 950r/min, performing vacuum defoaming, pouring into a mold, and curing to obtain the fly ash particles.
Further, the dosage ratio of the fly ash, the surfactant and the polypropylene fiber is 1g to 1mL to 3.8g.
In one embodiment, the mass ratio of the ceramic powder to the starch is 10:1.
In one embodiment, the foamed ceramic is prepared by the steps of:
crushing waste ceramic to obtain ceramic powder, ball-milling the ceramic powder with starch, a foam stabilizer and a dispersing agent in water for 20min, adding a foaming agent, stirring for 35min, homogenizing under the condition of 10MPa pressure for 40s, pouring into a mold, transferring into a baking oven with the temperature of 75 ℃ for heat preservation for 2h, transferring into the baking oven for drying for 2d, performing primary sintering, performing secondary sintering, and performing heat preservation for 1h to obtain the foamed ceramic.
In one embodiment, the dispersant is one or more of sodium stearate, ammonium polyacrylate, carboxylate, and sulfonate.
In one embodiment, the water reducer is one or more of a polycarboxylate water reducer and a melamine water reducer.
In one embodiment, the inner side of the wallboard is further provided with a wood fiber board, and the wood fiber board is obtained by processing natural renewable wood and corn stalks.
In one embodiment, the wood fiber board has a density of 200Kg/m 3 The thickness of the wood fiber board is 20mm.
In one embodiment, the temperature of the first sintering is 550 ℃.
In one embodiment, the second sintering is performed at a temperature of 1650 ℃.
One embodiment of the invention also provides a production method of the heat insulation wallboard, which comprises the following steps:
s1, stirring and mixing cement, foamed ceramic, sand grains and fly ash particles for 2min under the condition that the rotating speed of the particles is 500r/min, then adding water reducing agent, foam stabilizer and foaming agent, continuously stirring for 3min under the condition that the temperature is 60 ℃, and then carrying out ultrasonic treatment for 20min under the condition that the frequency is 25kHz to obtain a mixture;
s2, placing the mixture into a wallboard mold, pouring and shaping, bonding the surface of the mixture with a wood fiber board after demolding, and air-drying the mixture under the constant-temperature environment condition at 25 ℃ to obtain the heat-insulating wallboard.
Example 2
The heat-insulating wallboard comprises the following raw materials in parts by weight:
52 parts of cement, 40 parts of foamed ceramic, 12 parts of sand grains, 8 parts of fly ash particles, 0.20 part of foam stabilizer, 10 parts of foaming agent and 0.3 part of water reducer;
the fly ash particles are prepared by the following steps:
adding the fly ash into a ball mill, performing ball milling for 3.5min, adding a surfactant and polypropylene fibers, stirring and foaming for 1.5h to obtain a dispersion, adding the cooked cement slurry, stirring at the rotating speed of 970r/min, performing vacuum defoaming, pouring into a mould, and curing to obtain the fly ash particles.
Further, the dosage ratio of the fly ash, the surfactant and the polypropylene fiber is 1g to 1mL to 3.8g.
In one embodiment, the mass ratio of the ceramic powder to the starch is 11:1.3.
In one embodiment, the foamed ceramic is prepared by the steps of:
crushing the waste ceramic to obtain ceramic powder, ball-milling the ceramic powder, starch, a foam stabilizer and a dispersing agent with water for 25min, adding a foaming agent, stirring for 40min, homogenizing under the condition of 13MPa pressure for 45s, pouring into a mold, transferring into a baking oven with the temperature of 80 ℃ for 2.5h, transferring into the baking oven for drying for 2.5d, performing primary sintering, preserving heat for 2.5h, performing secondary sintering, and preserving heat for 1.3h to obtain the foamed ceramic.
In one embodiment, the dispersant is one or more of sodium stearate, ammonium polyacrylate, carboxylate, and sulfonate.
In one embodiment, the water reducer is one or more of a polycarboxylate water reducer and a melamine water reducer.
In one embodiment, the inner side of the wallboard is further provided with a wood fiber board, and the wood fiber board is obtained by processing natural renewable wood and corn stalks.
In one embodiment, the wood fiber board has a density of 240Kg/m 3 The thickness of the wood fiber board is 20-35mm.
In one embodiment, the temperature of the first sintering is 580 ℃.
In one embodiment, the second sintering is performed at a temperature of 1710 ℃.
One embodiment of the invention also provides a production method of the heat insulation wallboard, which comprises the following steps:
s1, stirring and mixing cement, foamed ceramic, sand grains and fly ash particles for 4min under the condition that the rotating speed of the particles is 700r/min, then adding water reducing agent, foam stabilizer and foaming agent, continuously stirring for 4min under the condition that the temperature is 60 ℃, and then carrying out ultrasonic treatment for 25min under the condition that the frequency is 27kHz to obtain a mixture;
s2, placing the mixture into a wallboard mold, pouring and shaping, bonding the surface of the mixture with a wood fiber board after demolding, and air-drying the mixture under the constant-temperature environment condition of 26 ℃ to obtain the heat-insulating wallboard.
Example 3
The heat-insulating wallboard comprises the following raw materials in parts by weight:
62 parts of cement, 47 parts of foamed ceramic, 13 parts of sand grains, 11 parts of fly ash particles, 0.3 part of foam stabilizer, 15 parts of foaming agent and 0.5 part of water reducer;
the fly ash particles are prepared by the following steps:
adding the fly ash into a ball mill, performing ball milling for 4min, adding a surfactant and polypropylene fibers, stirring and foaming for 2h to obtain a dispersion, adding the cooked cement slurry, stirring at the rotating speed of 980r/min, performing vacuum defoaming, pouring into a mold, and curing to obtain the fly ash particles.
Further, the dosage ratio of the fly ash, the surfactant and the polypropylene fiber is 1g to 1mL to 3.8g.
In one embodiment, the mass ratio of the ceramic powder to the starch is 12:1.6.
In one embodiment, the foamed ceramic is prepared by the steps of:
crushing the waste ceramic to obtain ceramic powder, ball-milling the ceramic powder, starch, a foam stabilizer and a dispersing agent with water for 30min, adding a foaming agent, stirring for 44min, homogenizing under the condition of 15MPa pressure for 50s, pouring into a mold, transferring into a baking oven with the temperature of 86 ℃ for heat preservation for 2-3h, transferring into the baking oven for drying for 3d, performing primary sintering, performing secondary sintering, and performing heat preservation for 1.5h to obtain the foamed ceramic.
In one embodiment, the dispersant is one or more of sodium stearate, ammonium polyacrylate, carboxylate, and sulfonate.
In one embodiment, the water reducer is one or more of a polycarboxylate water reducer and a melamine water reducer.
In one embodiment, the inner side of the wallboard is further provided with a wood fiber board, and the wood fiber board is obtained by processing natural renewable wood and corn stalks.
In one embodiment, the wood fiber board has a density of 270Kg/m 3 The thickness of the wood fiber board is 35mm.
In one embodiment, the temperature of the first sintering is 620 ℃.
In one embodiment, the second sintering is performed at a temperature of 1770 ℃.
One embodiment of the invention also provides a production method of the heat insulation wallboard, which comprises the following steps:
s1, stirring and mixing cement, foamed ceramic, sand grains and fly ash particles for 6min under the condition that the rotating speed of the particles is 800r/min, then adding water reducing agent, foam stabilizer and foaming agent, continuously stirring for 5min under the condition that the temperature is 60 ℃, and then carrying out ultrasonic treatment for 30min under the condition that the frequency is 30kHz to obtain a mixture;
s2, placing the mixture into a wallboard mold, pouring and shaping, bonding the surface of the mixture with a wood fiber board after demolding, and air-drying the mixture under the constant-temperature environment condition at the temperature of 27 ℃ to obtain the heat-insulating wallboard.
Comparative example
The comparative example is a common heat-insulating wallboard in the market.
Performance tests were performed on the heat insulation wallboard prepared in examples 1 to 3 and comparative examples, and the test results are shown in table 1 below;
it can be seen from table 1 that the products prepared in examples 1-3 have lower thermal conductivity, improve the strength of the insulation board, and increase the cell size of the insulation board, and have smaller thermal conductivity and better insulation performance.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the content of the present invention or direct/indirect application in other related technical fields are included in the scope of the present invention.
Claims (10)
1. The heat-insulating wallboard is characterized by comprising the following raw materials in parts by weight:
43-62 parts of cement, 32-47 parts of foamed ceramic, 10-13 parts of sand grains, 5-11 parts of fly ash particles, 0.14-0.3 part of foam stabilizer, 6-15 parts of foaming agent and 0.2-0.5 part of water reducer;
the fly ash particles are prepared by the following steps:
adding the fly ash into a ball mill for ball milling, adding a surfactant and polypropylene fibers for stirring and foaming to obtain a dispersion, adding the cooked cement slurry for stirring and vacuum defoaming, pouring into a mould, and solidifying to obtain the fly ash particles.
2. The heat-insulating wallboard of claim 1, wherein,
the foamed ceramic is prepared by the following steps:
crushing the waste ceramic to obtain ceramic powder, ball-milling the ceramic powder, starch, a foam stabilizer and a dispersing agent with water for 20-30min, adding a foaming agent, stirring for 35-44min, pouring into a mold, transferring into a baking oven with the temperature of 75-86 ℃ for heat preservation for 2-3h, transferring into the baking oven for drying for 2-3d, performing primary sintering, performing heat preservation for 2-3h, performing secondary sintering, and performing heat preservation for 1-1.5h to obtain the foamed ceramic.
3. The heat-insulating wallboard of claim 1, wherein,
the mass ratio of the ceramic powder to the starch is 10-12:1-1.6.
4. The insulated wall panel of claim 1, wherein the dispersant is one or more of sodium stearate, ammonium polyacrylate, carboxylate, and sulfonate.
5. The heat-insulating wallboard of claim 1, wherein,
the water reducing agent is one or more of a polycarboxylate water reducing agent and a melamine water reducing agent.
6. The heat-insulating wallboard of claim 1, wherein,
the inner side of the wallboard is also provided with a wood fiber board, and the wood fiber board is obtained by processing natural renewable wood and corn stalks.
7. The heat-insulating wallboard of claim 6, wherein,
the density of the wood fiber board is 200-270Kg/m 3 The thickness of the wood fiber board is 20-35mm.
8. The heat-insulating wallboard of claim 2, wherein,
the temperature of the first sintering is 550-620 ℃.
9. The heat-insulating wallboard of claim 2, wherein,
the temperature of the second sintering is 1650-1770 ℃.
10. The method for producing a heat insulation wallboard according to any one of claims 1 to 9, comprising the steps of:
s1, stirring and mixing cement, foamed ceramics, sand grains and fly ash particles for 2-6min, then adding a water reducer, a foam stabilizer and a foaming agent, and continuing stirring for 3-5min to obtain a mixture;
s2, placing the mixture into a wallboard mold, pouring and shaping, demolding, bonding the surface of the mixture with a wood fiber board, and air-drying the mixture under the constant-temperature environment condition of 25-27 ℃ to obtain the heat-insulating wallboard.
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