CN116874235A - Preparation method of fiber clay reinforced solid waste base polymer heat insulation material - Google Patents

Preparation method of fiber clay reinforced solid waste base polymer heat insulation material Download PDF

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Publication number
CN116874235A
CN116874235A CN202310791237.5A CN202310791237A CN116874235A CN 116874235 A CN116874235 A CN 116874235A CN 202310791237 A CN202310791237 A CN 202310791237A CN 116874235 A CN116874235 A CN 116874235A
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solid waste
parts
alkali
industrial solid
potassium
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姜娟
牛强
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Inner Mongolia Erdos Electric Power Metallurgy Group Co Ltd
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Inner Mongolia Erdos Electric Power Metallurgy Group Co Ltd
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Priority to CN202310791237.5A priority Critical patent/CN116874235A/en
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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
    • C04B28/006—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 mineral polymers, e.g. geopolymers of the Davidovits type
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    • C04B14/02—Granular materials, e.g. microballoons
    • C04B14/04—Silica-rich materials; Silicates
    • C04B14/042—Magnesium silicates, e.g. talc, sepiolite
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    • C04B14/02—Granular materials, e.g. microballoons
    • C04B14/04—Silica-rich materials; Silicates
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    • C04B18/14—Waste materials; Refuse from metallurgical processes
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    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/04—Waste materials; Refuse
    • C04B18/18—Waste materials; Refuse organic
    • C04B18/20—Waste materials; Refuse organic from macromolecular compounds
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    • C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
    • C04B22/08—Acids or salts thereof
    • C04B22/14—Acids or salts thereof containing sulfur in the anion, e.g. sulfides
    • C04B22/142—Sulfates
    • C04B22/143—Calcium-sulfate
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    • C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
    • C04B22/08—Acids or salts thereof
    • C04B22/14—Acids or salts thereof containing sulfur in the anion, e.g. sulfides
    • C04B22/142—Sulfates
    • C04B22/143—Calcium-sulfate
    • C04B22/145—Gypsum from the desulfuration of flue gases
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    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
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    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
    • C04B41/5024—Silicates
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    • C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
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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
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    • C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength

Abstract

The invention belongs to the technical field of industrial solid waste resource utilization and building material manufacturing, and particularly relates to a preparation method of a fiber clay reinforced solid waste base polymer heat insulation material. The preparation method of the material comprises the following steps: uniformly mixing fiber clay, water, industrial solid waste and an alkali excitant to obtain slurry; pouring to obtain a blank with a required shape, and curing at room temperature; freeze-drying the well-maintained green body to obtain a porous structure; finally, a proper amount of water glass is used for soaking, and steam curing is carried out, so that the fiber clay reinforced solid waste base polymer porous heat preservation and heat insulation material is obtained. The heat insulation material obtained by the method has the characteristics of green low carbon, low cost, controllable porosity and pore size and the like, and simultaneously achieves the purposes of lighter weight, stronger strength, fire resistance and heat insulation.

Description

Preparation method of fiber clay reinforced solid waste base polymer heat insulation material
Technical Field
The invention belongs to the technical field of industrial solid waste resource utilization and building materials, and particularly relates to a preparation method of a fiber clay reinforced solid waste base polymer heat-insulating material.
Background
The high-rise buildings in various large cities are dense at present, and an efficient, energy-saving, environment-friendly and A-level fireproof building external wall heat insulation material is urgently needed, and especially the concept of 'fireproof before heat insulation' is deep. The current heat preservation and insulation materials for construction comprise polyurethane foam, polystyrene extruded sheets, polystyrene foam sheets, phenolic resin sheets, foaming cement, aerated concrete and the like. Wherein the organic thermal insulation material accounts for about 90%, and the inorganic thermal insulation material accounts for only about 10%. The organic heat-insulating material has poor heat resistance and fireproof performance, is easy to decompose when heated and is easy to generate toxic smoke, and further application and development of the organic heat-insulating material are greatly limited. In contrast, the inorganic heat-insulating material, such as aerated concrete, foaming cement and the like, has excellent fireproof performance, can achieve A-level fireproof performance, has good fireproof effect, and belongs to flame-retardant and incombustible materials. With the improvement of people on fireproof requirements, the market share of inorganic heat-insulating materials is greatly improved, and the inorganic heat-insulating materials are taken as modern heat-insulating materials with great potential.
However, the inorganic heat-preservation and heat-insulation material has the problems of high material density, slightly poor heat-insulation effect, lower compressive strength, complex preparation process and the like in the use process. Therefore, solving the problems through technical innovation further expands the application scenes and market share of the inorganic heat-insulating material. From the viewpoint of raw materials, both aerated concrete and foamed cement use Portland cement as a main raw material, whereas cement belongs to a high-energy consumption and high-carbon emission material. The industrial solid waste is used for replacing cement, so that the industrial solid waste can be consumed in a large scale, and the carbon emission of the whole life cycle of the material can be reduced. From the material performance, the compressive strength of the traditional foaming cement is less than 0.6MPa, the heat conductivity coefficient is about 0.08-0.25W/(m.K), and the traditional foaming cement has a large lifting space. In general, the thermal conductivity of the material needs to be further improved, and this tends to further reduce the strength of the material, so how to achieve light weight and thermal insulation of the inorganic material while further improving the strength is a key problem for replacing the organic thermal insulation material.
From the preparation method of materials, the foaming cement is mainly prepared by a chemical foaming method at present, a large number of bubbles are introduced into slurry by adding chemical foaming agents such as calcium carbide, ammonium salt, aluminum powder, hydrogen peroxide and the like, and the product is prepared by casting and curing. The bubbles generated by the method are unstable, the foaming is too fast, the internal through holes of the product are easy to form, and the material strength is low; too slow foaming results in too little foaming, and thus the light weight and heat preservation requirements of the product are not met. Patent CN105174895a discloses a preparation method of a light waterproof thermal insulation material for building outer walls, which takes sepiolite fiber, alkali-exciting agent, modified fly ash, desulfurized gypsum, hydroxymethyl cellulose and other materials as premix, and adopts a foaming-normal temperature curing method of foaming agent to perform molding, wherein the thermal conductivity coefficient of the obtained building outer wall material is only 0.052-0.06W/(m.k), but the compressive strength is only 0.32-0.38MPa, and the combination of the compressive strength and the thermal insulation performance cannot be realized. Patent CN107963908A discloses a high-strength light brick, which is formed by using modified sepiolite, fly ash, bauxite, coking, sodium fluoride, sludge, gypsum, papermaking black liquor, agar and other raw materials to prepare slurry and curing with high-pressure steam and sintering at high temperature, wherein the compressive strength of the high-strength light brick can reach 4.3-6.3MPa, but the heat conductivity coefficient is only 0.132-0.391W/(m·k), and the heat insulation performance and the compressive strength can not be simultaneously realized.
Disclosure of Invention
In view of the above, the present invention aims to provide a method for preparing a geopolymer by using industrial solid waste as a main raw material of an inorganic heat-insulating material, fibrous clay as a reinforcing material, and freeze-drying as a foaming control means, namely a novel method for preparing a fibrous clay reinforced solid waste base polymer heat-insulating material, aiming at the problem that the conventional material preparation technology is difficult to realize the preparation of the geopolymer integrating light weight, high strength, heat insulation and fireproof characteristics. The method is simple and feasible, green and low-carbon, and the prepared geopolymer material has the advantages of light weight, heat insulation, high strength and fire resistance.
In order to achieve the purpose of the invention, the technical scheme adopted is as follows:
the invention provides a preparation method of a fiber clay reinforced solid waste base polymer heat insulation material, which is characterized by comprising the following steps:
s1: mixing fiber clay, water, industrial solid waste and alkali excitant to obtain slurry;
s2: pouring the slurry obtained in the step S1 to obtain a blank body, and curing;
s3: freeze-drying the green body after the maintenance in the step S2 to obtain porous materials;
s4: and (3) soaking the porous material obtained in the step (S3) with water glass, and performing steam curing to obtain the fiber clay reinforced solid waste base polymer heat-insulating material.
Among them, fibrous clays, including but not limited to sepiolite and attapulgite, etc.;
industrial solid wastes including, but not limited to, metallurgical slag, coal gangue, fly ash, carbide slag, desulfurized gypsum, red mud, phosphogypsum, tailings, stone processing substrate sludge, metal cutting fragments, waste bricks, waste tiles, waste stone blocks, waste concrete, waste asphalt, and the like.
Preferably, in step S1, the fibrous clay includes at least one of sepiolite and attapulgite.
As a specific example of the present invention, the fibrous clay is attapulgite.
Preferably, in step S1, the purity of the fibrous clay is not less than 85%.
More preferably, in step S1, the purity of the fibrous clay is not less than 90%.
As a specific example of the present invention, the purity of the fibrous clay was 95%.
Preferably, in step S1, the industrial solid waste is at least three selected from metallurgical slag, coal gangue, fly ash, carbide slag, desulfurized gypsum, red mud, phosphogypsum, tailings, stone processing bottom mud, metal cutting fragments, waste bricks, waste tiles, waste stone blocks, waste concrete and waste asphalt.
More preferably, in step S1, the industrial solid waste is at least four selected from metallurgical slag, coal gangue, fly ash, carbide slag, desulfurized gypsum, red mud, phosphogypsum, tailings and stone processing bottom mud.
Still preferably, in step S1, the industrial solid waste is at least four selected from metallurgical slag, coal gangue, fly ash, desulfurized gypsum, and carbide slag.
Still preferably, in step S1, the industrial solid waste is selected from four kinds of metallurgical slag, coal gangue, fly ash, desulfurized gypsum, and carbide slag.
In step S1, the industrial solid waste is metallurgical slag, gangue, fly ash and desulfurized gypsum.
In step S1, the industrial solid waste is gangue, fly ash, desulfurized gypsum and carbide slag.
Preferably, in step S1, four industrial solid wastes are used, and the mass ratio between each industrial solid waste ranges from 1 to 100:1-100:1-100:1-100.
More preferably, in step S1, four industrial solid wastes are used, and the mass ratio between each industrial solid waste ranges from 1 to 10:1-10:1-10:1-10.
Still preferably, in step S1, four industrial solid wastes are used, and the mass ratio range between each industrial solid waste is 1:1:1:1.
as a specific embodiment of the invention, the industrial solid wastes are metallurgical slag, coal gangue, fly ash and desulfurized gypsum, and the mass ratio of each solid waste is 1:1:1:1.
As a specific embodiment of the invention, the industrial solid waste is coal gangue, fly ash, desulfurized gypsum and carbide slag, and the mass ratio of each solid waste is 1:1:1:1.
Preferably, in the step S1, the industrial solid waste particle sizes are all less than or equal to 100 mu m.
More preferably, in step S1, the industrial solid waste particle sizes used are all 50 μm or less.
As a specific example of the present invention, the industrial solid waste particle size used is < 50. Mu.m.
In step S1, the alkali-activator includes at least one of hydroxide, fluoride, silicate, sulfate, phosphate, citrate, carbonate, bicarbonate, sulfite, sulfide, hypochlorite, oxalate, acetate, and borate.
Wherein the alkali-activated agent is any one of ammonium salt, lithium salt, sodium salt, potassium salt and magnesium salt.
Preferably, in step S1, the alkali-activator includes: at least one of sodium hydroxide, sodium silicate, sodium sulfate, sodium phosphate, sodium citrate, sodium bicarbonate, potassium hydroxide, potassium silicate, potassium sulfate, potassium phosphate, potassium citrate, and potassium bicarbonate.
More preferably, in step S1, the alkali-activator comprises at least one of sodium hydroxide, sodium silicate, sodium citrate, potassium hydroxide, potassium silicate, and potassium citrate.
Still preferably, in step S1, the alkali-activator comprises two of sodium hydroxide, sodium silicate, sodium citrate, potassium hydroxide, potassium silicate, and potassium citrate.
As a specific embodiment of the present invention, in step S1, the alkali-activator used is sodium hydroxide and sodium silicate.
As a specific embodiment of the present invention, in step S1, the alkali-activator used is sodium hydroxide and sodium citrate.
Preferably, in step S1, two alkali-activators are used and the mass ratio of the two alkali-activators is 1-100:1-100.
More preferably, in step S1, two alkali-activators are used and the mass ratio of the two alkali-activators is 1 to 10:1-10.
Still preferably, in step S1, two alkali-activators are used and the mass ratio of the two alkali-activators is 1:1.
as a specific embodiment of the present invention, in step S1, the alkali-activator is sodium hydroxide and sodium citrate, and the mass ratio is 1:1.
as a specific embodiment of the present invention, in step S1, the alkali-activator is sodium hydroxide and sodium silicate, and the mass ratio is 1:1.
preferably, in step S1, the mass parts of the industrial solid waste, the alkali-exciting agent and the fiber clay are as follows: 60-85 parts of industrial solid waste, 15-25 parts of alkali-activated agent, 5-15 parts of fiber clay and 40-75 parts of water.
More preferably, in step S1, the mass parts of the industrial solid waste, the alkali-exciting agent and the fiber clay are as follows: 65-80 parts of industrial solid waste, 15-25 parts of alkali-activated agent, 5-15 parts of fiber clay and 45-75 parts of water.
Still preferably, in step S1, the mass parts of the industrial solid waste, the alkali-exciting agent and the fiber clay are as follows: 70-80 parts of industrial solid waste, 15-20 parts of alkali-activated agent, 5-10 parts of fiber clay and 50-70 parts of water.
As a specific embodiment of the present invention, in step S1, the mass parts of the industrial solid waste, the alkali-exciting agent and the fiber clay are as follows: 70 parts of industrial solid waste, 20 parts of alkali-activated agent, 10 parts of fiber clay and 60 parts of water.
As a specific embodiment of the present invention, in step S1, the mass parts of the industrial solid waste, the alkali-exciting agent and the fiber clay are as follows: 70 parts of industrial solid waste, 20 parts of alkali-activated agent, 10 parts of fiber clay and 50 parts of water.
As a specific embodiment of the present invention, in step S1, the mass parts of the industrial solid waste, the alkali-exciting agent and the fiber clay are as follows: 70 parts of industrial solid waste, 20 parts of alkali-activated agent, 10 parts of fiber clay and 70 parts of water.
As a specific embodiment of the present invention, in step S1, the mass parts of the industrial solid waste, the alkali-exciting agent and the fiber clay are as follows: 80 parts of industrial solid waste, 15 parts of alkali-exciting agent, 5 parts of fiber clay and 60 parts of water. Preferably, in step S1, the fibrous clay is ultrasonically dispersed after being mixed with water.
More preferably, in step S1, the ultrasonic dispersion frequency is 1000-40000Hz, and the ultrasonic time is 1-60min.
Still preferably, in step S1, the ultrasonic dispersion frequency is 5000-30000Hz, and the ultrasonic time is 3-15min.
As a specific embodiment of the present invention, in step S1, the ultrasonic dispersion frequency is 20000Hz, and the ultrasonic time is 10min.
Preferably, in step S1, the mixing mode is stirring.
Preferably, in step S1, the stirring speed is 1-1000 rpm, and the stirring time lasts for 1-100min.
More preferably, in step S1, the stirring speed is 100-500 rpm, and the stirring time lasts for 3-10min.
As a specific embodiment of the present invention, in the step S1, the stirring speed is 300 rpm, and the stirring time lasts for 10min.
Preferably, in step S2, the curing time is 1-120h.
More preferably, in step S2, the curing time is 4 to 48 hours.
Still preferably, in step S2, the curing time is 18-30 hours.
As a specific embodiment of the present invention, in step S2, the curing time is 10h.
Preferably, in step S3, the conditions of freeze-drying are: drying at below 7deg.C for 1-100 hr.
Still preferably, in step S3, the conditions for freeze-drying are: drying at-10deg.C for 1-100h.
More preferably, in step S3, the conditions of freeze-drying are: drying at-10deg.C for 3-24h.
More preferably, in step S3, the conditions of freeze-drying are: drying at-10deg.C for 6-10h.
More preferably, in step S3, the conditions of freeze-drying are: drying at-15deg.C for 6-10 hr.
As a specific embodiment of the present invention, in step S3, the freeze-drying conditions are: drying at-10deg.C for 6h.
As a specific embodiment of the present invention, in step S3, the freeze-drying conditions are: drying at-15 ℃ for 10h.
Preferably, in step S4, the water glass has a modulus of 1.0-2.5 and a concentration of 10-50%.
More preferably, in step S4, the water glass has a modulus of 1.0 to 2.0 and a concentration of 25 to 50%.
As a specific embodiment of the present invention, in the step S4, the water glass has a modulus of 1.0-2.0 and a concentration of 30-45%.
In the step S5, the mass of the water glass is 2-10% of that of the porous material.
As a specific embodiment of the present invention, in step S5, the mass of the water glass is 5% of the mass of the porous material.
Preferably, in step S4, the steam curing temperature is 40-100 ℃ and the curing time is 6-180h.
More preferably, in step S4, the steam curing temperature is 50-100 ℃ and the curing time is 12-96 hours.
Still preferably, in step S4, the steam curing temperature is 50-100 ℃ and the curing time is 24-72h.
As a specific embodiment of the present invention, in the step S4, the steam curing temperature is 80 ℃ and the curing time is 24 hours.
Compared with the prior art, the invention has the beneficial effects that:
(1) The porous geopolymer heat-insulating material is prepared by using industrial solid waste as a raw material, the source of the solid waste raw material is wide and rich, the use of cement is avoided, and the porous geopolymer heat-insulating material is a green low-carbon and zero-cost material. And at least three solid wastes are used, so that the compressive strength of the geopolymer is enhanced.
(2) The fiber clay used in the invention comprises attapulgite and sepiolite, has low raw material cost and good heat insulation performance, can be used as a reinforcing material, greatly improves the mechanical property of the material, and can further improve the heat insulation performance of the material. And the introduction of the fiber clay does not affect the fireproof effect of the whole material.
(3) The porous geopolymer heat-insulating material prepared by the method has the characteristics of controllable porosity and pore size and the like, and has the effects of lower heat conductivity coefficient and lighter weight.
Detailed Description
The following non-limiting examples will enable those of ordinary skill in the art to more fully understand the invention and are not intended to limit the invention in any way. The following is merely exemplary of the scope of the invention as it is claimed and many variations and modifications of the invention will be apparent to those skilled in the art in light of the disclosure, which should be considered as falling within the scope of the invention as claimed.
The invention is further illustrated by means of the following specific examples. The various chemical reagents used in the examples of the present invention were obtained by conventional commercial means unless otherwise specified. Unless otherwise specified, the contents are mass contents in the following. Unless otherwise indicated, it is understood that it is carried out at room temperature.
Example 1
A preparation method of a fiber clay reinforced solid waste base polymer heat preservation and insulation material comprises the following steps:
(1) Adding attapulgite with purity of 95% into water, and performing ultrasonic dispersion at 20000Hz for 10min. Then adding metallurgical slag, coal gangue, fly ash and desulfurized gypsum (the mass ratio of the solid waste is 1:1:1) with the granularity smaller than 50 mu m, and mixing with alkali-activator sodium hydroxide and sodium silicate (the mass ratio is 1:1), and stirring for 10min at the speed of 300 revolutions per minute.
Wherein the weight fractions of the components are as follows: 70 parts of industrial solid waste, 20 parts of alkali-activated agent, 10 parts of fiber clay and 60 parts of water.
(2) Pouring the obtained slurry to obtain a blank body with a required shape, and curing at room temperature for 24 hours.
(3) And freeze-drying the cured material to obtain the porous material. The conditions for freeze-drying were: drying at-15 ℃ for 10h.
(4) Finally, the porous material is impregnated by using water glass with the modulus of 1.0-2.0 and the concentration of 30-45%, the mass of the water glass accounts for 5% of the mass of the porous material, and the fiber clay reinforced solid waste base polymer heat insulation material is obtained after steam curing for 24 hours at 80 ℃, so that the fiber clay reinforced solid waste base polymer heat insulation material can be widely applied to walls and roofs in the field of construction, and especially in industrial extreme high-temperature environments.
Example 2
The difference from example 1 is that the purity of the attapulgite is 85% and the remainder is the same.
Example 3
The difference from example 1 is that the industrial solid waste types are gangue, fly ash, desulfurized gypsum and carbide slag, and the mass ratio is 1:1:1:1, a step of; the alkali-activated agent is sodium hydroxide and sodium citrate, and the mass ratio is 1:1, the remainder being identical.
Example 4
The difference from example 1 is that the alkali-activator is sodium hydroxide and sodium citrate, the mass ratio is 1:1, the remainder being identical.
Example 5
The difference from example 1 is that the weight fraction of each component is: 80 parts of industrial solid waste, 15 parts of alkali-activated agent, 5 parts of fiber type clay and 60 parts of water.
Example 6
The difference from example 1 was that the mass fraction of water was 70 parts, the remainder being the same.
Example 7
The difference from example 1 is that the mass fraction of water is 50 parts, the freezing temperature is-10 ℃, the vacuum drying time is 6 hours, and the rest is the same.
Example 8
The difference from example 1 is that 3 kinds of industrial solid wastes of carbide slag, fly ash and desulfurized gypsum (each solid waste mass ratio of 1:1:1) are used, and the others are the same.
Example 9
The difference from example 1 is that 4 industrial solid waste metallurgical slag, carbide slag, fly ash and desulfurized gypsum (each solid waste mass ratio of 1:1:1) are used, and the rest are the same.
Comparative example 1
The difference from example 1 is that the solid waste is two kinds of gangue and fly ash (the mass ratio of the two kinds of solid waste is 1:1), and the rest are the same.
Comparative example 2
The difference from example 1 is that the weight fraction of each component of the fibrous clay is: 87 parts of industrial solid waste, 10 parts of alkali-activated agent, 3 parts of fiber clay, 60 parts of water and the balance of the materials are the same.
Comparative example 3
The difference from example 1 is that the weight fraction of each component is: 70 parts of industrial solid waste, 20 parts of alkali-activated agent, 10 parts of fiber clay and 20 parts of water, and the balance of the materials are the same.
Comparative example 4
The difference from example 1 is that the weight fraction of each component is: 70 parts of industrial solid waste, 20 parts of alkali-activated agent, 10 parts of fiber clay, 80 parts of water and the balance of the materials.
Comparative example 5
The difference from example 1 is that the conditions for lyophilization are-5℃for 3 hours, the remainder being the same.
Comparative example 6
Unlike example 1, the following is: the comparative example does not have a lyophilization step and the rest of the conditions are the same.
Experimental results
The fiber type clay reinforced solid waste base polymer heat insulation material prepared by the preparation methods mentioned in the above examples and comparative examples was tested for its properties, and the results are shown in the following table.
* The fire-proof grade classification standard of the heat-insulating material in the table is as follows: GB8624-2012 classification of combustion properties of building materials and products. Fire rating a indicates a nonflammable building material.
According to the results shown in the table:
comparative example 1 has a low overall material strength because of the low number of reinforced waste species, poor excitation activity, and difficulty in forming an overall body with high strength connection, as compared with example 1.
Comparative example 2 is inferior in excitation effect to example 1 because the excitation agent is less; and the addition amount of the fiber clay is small, and the reinforcing and toughening effects of the most material are insufficient, so that the overall strength is low.
Comparative example 3 has poor pore-forming effect after freeze-drying because the amount of water added is small, and has high material density and high thermal conductivity compared with example 1.
Comparative example 4 has a good pore-forming effect after freeze-drying, a low material density and a low thermal conductivity, compared with example 1, because the water-cement ratio is too high. But because the pores are too high, the compressive strength of the material does not reach the standard.
Comparative example 5 has a low freezing temperature, a long drying time, insufficient evaporation of water from the inside, and relatively few voids formed, and the density and thermal conductivity of the obtained material are high, as compared with example 1.
Comparative example 6 compared with example 1, since the freeze-drying technique was not used, the inside of the sample was the conventional alkali-induced reaction, the inter-particle binding force was strong, the porosity was low, and the increase in the material density and the thermal conductivity was remarkable.
The foregoing detailed description is directed to one of the possible embodiments of the present invention, which is not intended to limit the scope of the invention, but is to be accorded the full scope of all such equivalents and modifications so as not to depart from the scope of the invention.

Claims (10)

1. The preparation method of the fiber clay reinforced solid waste base polymer heat preservation and insulation material is characterized by comprising the following steps:
s1: mixing fiber clay, water, industrial solid waste and alkali excitant to obtain slurry;
s2: pouring the slurry obtained in the step S1 to obtain a blank body, and curing;
s3: freeze-drying the green body after the maintenance in the step S2 to obtain porous materials;
s4: and (3) soaking the porous material obtained in the step (S3) with water glass, and performing steam curing to obtain the fiber clay reinforced solid waste base polymer heat-insulating material.
2. The method according to claim 1, wherein in step S1, the fibrous clay comprises at least one of sepiolite and attapulgite.
3. The method according to claim 1, wherein in step S1, the industrial solid waste is at least three selected from the group consisting of metallurgical slag, coal gangue, fly ash, carbide slag, desulfurized gypsum, red mud, phosphogypsum, tailings, stone processing bottom sludge, metal cutting fragments, waste bricks, waste tiles, waste stones, waste concrete, and waste asphalt; the alkali activator is at least one of sodium hydroxide, sodium silicate, sodium sulfate, sodium phosphate, sodium citrate, sodium bicarbonate, potassium hydroxide, potassium silicate, potassium sulfate, potassium phosphate, potassium citrate, and potassium bicarbonate.
4. The method according to claim 3, wherein in step S1, the industrial solid waste is at least four selected from the group consisting of metallurgical slag, gangue, fly ash, desulfurized gypsum, and carbide slag.
5. The method according to claim 3, wherein in step S1, the alkali activator is at least one of sodium hydroxide, sodium citrate, sodium silicate, potassium citrate, potassium hydroxide and potassium silicate.
6. The preparation method according to claim 1, wherein in step S1, the components are as follows in parts by weight: 60-80 parts of industrial solid waste, 10-25 parts of alkali-activated agent, 5-15 parts of fiber clay and 40-75 parts of water.
7. The preparation method according to claim 6, wherein in the step S1, the components are as follows in parts by weight: 70-80 parts of industrial solid waste, 15-20 parts of alkali-activated agent, 5-10 parts of fiber clay and 50-70 parts of water.
8. The method according to claim 1, wherein in step S2, the curing time is 4 to 48 hours, and in step S4, the steam curing temperature is 50 to 100 ℃ and the curing time is 24 to 72 hours.
9. The method according to claim 1, wherein in step S4, the water glass has a modulus of 1.0 to 2.0 and a concentration of 25 to 50%.
10. The method according to any one of claims 1 to 9, wherein in step S3, the condition of freeze-drying is-10 ℃ or lower for 6 to 10 hours.
CN202310791237.5A 2023-06-30 2023-06-30 Preparation method of fiber clay reinforced solid waste base polymer heat insulation material Pending CN116874235A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117362051A (en) * 2023-10-31 2024-01-09 河北润丰涂料有限公司 Environment-friendly heat-insulating refractory material and preparation method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117362051A (en) * 2023-10-31 2024-01-09 河北润丰涂料有限公司 Environment-friendly heat-insulating refractory material and preparation method thereof
CN117362051B (en) * 2023-10-31 2024-04-09 河北润丰涂料有限公司 Environment-friendly heat-insulating refractory material and preparation method thereof

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