CN114835509A - Preparation method of sintering-free alkali-activated inorganic sponge heat-insulation fireproof plate - Google Patents
Preparation method of sintering-free alkali-activated inorganic sponge heat-insulation fireproof plate Download PDFInfo
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- 239000003513 alkali Substances 0.000 title claims abstract description 48
- 238000009413 insulation Methods 0.000 title claims abstract description 9
- 238000002360 preparation method Methods 0.000 title claims description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 47
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims abstract description 30
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 30
- 239000002893 slag Substances 0.000 claims abstract description 21
- 239000000463 material Substances 0.000 claims abstract description 16
- 238000002156 mixing Methods 0.000 claims abstract description 13
- 239000010881 fly ash Substances 0.000 claims description 20
- 238000003756 stirring Methods 0.000 claims description 17
- 239000011148 porous material Substances 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 239000002002 slurry Substances 0.000 claims description 12
- 239000002245 particle Substances 0.000 claims description 11
- 239000012190 activator Substances 0.000 claims description 10
- 239000002994 raw material Substances 0.000 claims description 10
- 239000002699 waste material Substances 0.000 claims description 10
- 239000012153 distilled water Substances 0.000 claims description 8
- 238000000227 grinding Methods 0.000 claims description 8
- 239000000843 powder Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 238000010907 mechanical stirring Methods 0.000 claims description 6
- 238000005187 foaming Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 3
- 239000003638 chemical reducing agent Substances 0.000 claims description 3
- 238000011049 filling Methods 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 238000012216 screening Methods 0.000 claims description 2
- 230000007613 environmental effect Effects 0.000 abstract description 6
- 238000004321 preservation Methods 0.000 abstract description 6
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 230000007797 corrosion Effects 0.000 abstract description 3
- 238000005260 corrosion Methods 0.000 abstract description 3
- 230000001360 synchronised effect Effects 0.000 abstract description 3
- 230000009471 action Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 229910052782 aluminium Inorganic materials 0.000 abstract 2
- 239000004411 aluminium Substances 0.000 abstract 2
- 239000010883 coal ash Substances 0.000 abstract 1
- 230000000379 polymerizing effect Effects 0.000 abstract 1
- 239000004566 building material Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 238000011161 development Methods 0.000 description 4
- 230000005284 excitation Effects 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 239000002440 industrial waste Substances 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- 239000002956 ash Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000010812 mixed waste Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000009827 uniform distribution Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013012 foaming technology Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000009182 swimming Effects 0.000 description 1
Classifications
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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
- 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
-
- 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
-
- 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
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
-
- 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
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Engineering & Computer Science (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
A process for preparing the non-sintered alkali-activated inorganic sponge insulating and fire-proof plate includes such steps as proportionally mixing slags with powdered coal ash, adding powdered aluminium and nano-powdered aluminium, and polymerizing reaction under the action of potassium hydroxide/sodium hydroxide under alkali condition for fully participating in synchronous reaction. The material has the characteristics of light weight, heat preservation, heat insulation, moisture resistance, corrosion resistance, good environmental protection performance, low labor intensity and the like, and also has a fireproof function.
Description
Technical Field
The invention belongs to the technical field of green preparation of materials, and relates to a sintering-free alkali-activated inorganic sponge heat-insulation fireproof plate and a preparation method thereof, in particular to a fireproof heat-insulation plate which is efficiently foamed by adding nano aluminum powder into an alkali-based foaming material to generate uniform pores and relatively high strength.
Background
New building materials are an important component of the building materials industry and are a new industry in the building materials industry. Along with the innovation of building materials and the gradual increase of energy-saving strength of buildings in China, the improvement of standards of heat preservation, fire prevention, weight and strength of buildings and the improvement of living conditions, the demand of novel building materials is gradually increased, and the demand ensures that the building materials not only have good use functions, but also meet the pursuit of people for comfortable life. The external wall heat-insulating fireproof plate is mostly manufactured by a sintering process, high carbon emission can be caused by the technical process, and in recent years, the research on inorganic fireproof plates in China starts silently, especially key performance indexes and appearance quality which influence building functions, such as compactness, strength, fireproof performance, heat preservation and the like, but the gap is obvious compared with the advanced level in foreign countries. Although the centralized light building board is developed in China, the centralized light building board is still in the initial stage of development and research at present, and many problems need to be further solved in order to achieve the purposes of skillful process, reliable equipment operation and stable product quality.
The alkali-activated cementing material is a hydraulic cementing material prepared by using strong alkali to activate a matrix material, consists of a multi-element system of an activator and silicon-aluminum powder, and has the performance influenced by factors such as production process, components and the like. The alkali-activated cementing material has the characteristics of quick setting, early strength, high temperature resistance, corrosion resistance, heavy metal consolidation and the like, does not need calcination in the preparation process, is energy-saving and is more environment-friendly. According to the chemical composition of the industrial waste residue, the method of adjusting the component structure of the industrial waste residue, doping other materials and the like is adopted, the alkali excitation technology is applied, the protective material product is developed, the resource utilization of the industrial waste residue is realized, the exploitation of natural resources and carbon emission in the economic and social development are reduced, the overall and sustainable development of the economic development, social harmony and environmental protection is obtained, and the high environmental benefit is achieved.
In the invention
In order to overcome the defects of the traditional fire-proof plate sintering technology, the invention provides a preparation method of a non-sintered alkali-activated inorganic sponge heat-preservation fire-proof plate, an alkali-activated material and nano aluminum powder efficient foaming technology is tried to be researched, a fire-proof heat-preservation plate with uniform pores and relatively high strength is developed, waste fly ash, slag and the like are used as resources, the materials are fully played in the aspect of environmental protection, and the material has the characteristics of light weight, heat preservation, heat insulation, moisture resistance, corrosion resistance, good environmental protection performance, low labor intensity and the like and also has a fire-proof function.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a preparation method of a sintering-free alkali-activated inorganic sponge heat-insulating fireproof plate comprises the following steps:
step one, crushing and mixing treatment of waste residues: crushing and grinding the bulk raw material slag in a mechanical mode, grinding the fly ash in a mechanical mode, screening the crushed slag and the crushed fly ash through a 100-200-mesh sieve for later use, and mixing the slag and the fly ash according to a mass ratio of (40-70)%: (30-60)% of the raw materials are mixed uniformly in a mechanical stirring mode in advance;
step two, mixing treatment of aluminum powder and nano aluminum powder: aluminum powder and nano aluminum powder are mixed according to the mass ratio of (40-80)%: (20-60)% of the raw materials are mixed uniformly in a mechanical stirring mode in advance;
step three, preparing an alkaline activator solution: pouring potassium hydroxide or sodium hydroxide powder into distilled water, mechanically stirring and mixing, and uniformly stirring to obtain an alkaline activator solution, wherein the mass ratio of the potassium hydroxide or the sodium hydroxide to the distilled water is 1: (5-7);
step four, preparing aluminum powder alkali-activated slurry: adding the fly ash and the slag powder mixed in the step one and the aluminum powder and the nano aluminum powder mixed in the step two into a mechanical stirrer, stirring uniformly, slowly adding the mixture into the alkali activator solution in the step three, stirring uniformly by using the mechanical stirrer, finally adding a polycarboxylic acid water reducing agent, and continuing stirring for 0.5-5 minutes to obtain alkali-activated slurry containing aluminum powder;
step five, forming the alkali-activated porous material: pouring the aluminum powder alkali-activated slurry obtained in the fourth step into a mold, filling the aluminum powder alkali-activated slurry into the mold twice, and forming by adopting a manual and mechanical vibration mode to obtain a flaky alkali-activated waste residue porous material;
step six, curing the alkali-activated porous material: curing with a mold is continued after molding, and the mold is removed after 12-36 hours; maintaining at normal temperature after removing the mold, and spraying water at set intervals to keep the surface of the test piece moist for one time; and curing for 22-40 days to obtain the finished product of the alkali-activated inorganic sponge heat-insulating fireproof plate.
Further, in the first step, the particle size of the crushed slag is 1-10 μm, and the particle size of the ground fly ash is 1-8 μm.
And further, in the second step, the aluminum powder and the nano aluminum powder are uniformly mixed to obtain the light material with uniformly distributed large and small holes and uniform foaming.
The alkali-activated porous heat-insulating fireproof material prepared by the invention is prepared by compounding the slag and the fly ash according to different proportions, adding aluminum powder and nano-aluminum powder in different proportions for uniform mixing, and carrying out polymerization reaction in a short time under the excitation action of potassium hydroxide/sodium hydroxide under an alkaline condition, so that raw materials with different activities fully participate in synchronous reaction and utilization, and further the alkali-activated light porous material with a nano-pore structure can be obtained under a low-temperature condition, the effect of uniform distribution of large and small pores is achieved, the strength is ensured, and the foaming is full.
The mass ratio of the mixed waste residue raw material to the alkaline excitation solution and the aluminum powder to the nano aluminum powder is controllable, the components and the size and the aperture of the obtained porous material can be directly regulated and controlled by controlling the proportion of the mixed waste residue raw material to the alkaline excitation solution and the aluminum powder to the nano aluminum powder, and the process is simple.
The invention has the following beneficial effects:
1. the alkali-activated inorganic sponge heat-insulating fireproof material has the advantages of uniform distribution of generated big and small holes, sufficient foaming, high strength, heat insulation, fire prevention and the like.
2. High carbon emission of the sintering process is avoided, and high environmental benefits are achieved.
3. The wastes such as fly ash, mineral powder and the like are fully utilized, so that the wastes are converted into valuable swimming.
Detailed Description
The invention is further described below.
Example 1
The invention relates to a preparation method of a sintering-free alkali-activated inorganic sponge heat-insulating fireproof plate, which realizes synchronous reaction of waste residues such as aluminum powder, fly ash and the like and an alkali-activated solution in a short time by proper premixing, and the preparation process is carried out according to the following steps:
step one, crushing and mixing treatment of waste residues: crushing and grinding the bulk raw material slag in a mechanical mode, grinding the crushed slag into particles with a median diameter of about 5 microns, grinding large-particle fly ash into particles with a median diameter of 5 microns, sieving the pulverized fly ash with a 100-mesh sieve for standby use, and mixing the slag and the fly ash according to a mass ratio of 40%: 60% are mixed homogeneously beforehand for 5 minutes by means of mechanical stirring.
Step two, mixing treatment of aluminum powder and nano aluminum powder: the aluminum powder and the nano aluminum powder are mixed according to the mass ratio of 50%: 50% are mixed homogeneously by means of mechanical stirring for 5 minutes.
Step three, preparing an alkaline activator solution: pouring potassium hydroxide or sodium hydroxide powder into distilled water, mechanically stirring for 10 minutes, and uniformly stirring to obtain an alkaline activator solution. The mass ratio of the potassium hydroxide or the sodium hydroxide to the distilled water is 1: 6.
step four, preparing aluminum powder alkali-activated slurry: adding the fly ash and the slag powder mixed in the step one and the aluminum powder and the nano aluminum powder mixed in the step two into a mechanical stirrer, stirring for 10 minutes, slowly adding the mixture into the alkali activator solution in the step three, stirring for 5 minutes by using the mechanical stirrer, finally adding the polycarboxylic acid water reducing agent, and continuing stirring for 1 minute to obtain the alkali-activated slurry containing the aluminum powder.
Step five, forming the alkali-activated porous material: pouring the aluminum powder alkali-activated slurry obtained in the fourth step into a mold, filling the aluminum powder alkali-activated slurry into the mold twice, and forming by adopting a manual and mechanical vibration mode to obtain the flaky alkali-activated waste residue porous material.
Step six, curing the alkali-activated porous material: curing with a mold is continued after molding, and the mold is removed after 24 hours; maintaining at normal temperature after removing the mold, and spraying water at intervals of 8 hours to keep the surface of the test piece moist; and curing for 28 days to obtain the finished product of the alkali-activated inorganic sponge heat-insulating fireproof plate.
The performance of the porous heat-insulating fireproof material of example 1 is tested, and the measured data are shown in table 1.
| Density of | 265 kg per cube |
| Compressive strength | 0.75 |
| Tensile strength in the direction perpendicular to the plane of the plate | 0.25 |
| Thermal conductivity (average temperature 25 ℃ C.) | 0.03 |
| Volumetric water absorption | 1.0 |
| Dry shrinkage ratio | 0.1 |
| Coefficient of softening | 1.05 |
| Rate of loss of hot dip strength | 15 |
| Freezing resistance (loss of mass, loss of compressive strength) | 1.0、5.0 |
| Combustion performance | Class A |
TABLE 1
Example 2
In this embodiment, in the first step, the particle size of the crushed slag is 1 μm, and the particle size of the pulverized fuel ash is 1 μm after grinding. The mass ratio of the slag to the fly ash is 50%: 50 percent of
In the second step, the aluminum powder and the nano aluminum powder are 40% by mass: 60 percent;
in the third step, the mass ratio of the potassium hydroxide or the sodium hydroxide to the distilled water is 1: 5.
in the fourth step, stirring was continued for 0.55 min.
In the fifth step, the mould is removed after 12 hours; and maintaining for 22 days.
The other aspects of this example are the same as example 1.
Example 3
In the embodiment, in the first step, the particle size of the crushed slag is 10 μm or less, and the particle size of the pulverized fuel ash is 8 μm or less. The mass ratio of the slag to the fly ash is 70%: 30 percent;
in the second step, the aluminum powder and the nano aluminum powder are 80% in mass ratio: 20 percent;
in the third step, the mass ratio of the potassium hydroxide or the sodium hydroxide to the distilled water is 1: 7.
in the fourth step, stirring was continued for 5 minutes.
In the fifth step, the mould is removed after 36 hours; and maintaining for 40 days.
The other aspects of this example are the same as example 1.
The embodiments described in this specification are merely illustrative of implementations of the inventive concepts, which are intended for purposes of illustration only. The scope of the present invention should not be construed as being limited to the particular forms set forth in the examples, but rather as being defined by the claims and the equivalents thereof which can occur to those skilled in the art upon consideration of the present inventive concept.
Claims (3)
1. The preparation method of the sintering-free alkali-activated inorganic sponge heat-insulation fireproof plate is characterized by comprising the following steps of:
step one, crushing and mixing treatment of waste residues: crushing and grinding the bulk raw material slag in a mechanical mode, grinding the fly ash in a mechanical mode, screening the crushed slag and the crushed fly ash through a 100-200-mesh sieve for later use, and mixing the slag and the fly ash according to a mass ratio of (40-70)%: (30-60)% of the raw materials are mixed uniformly in a mechanical stirring mode in advance;
step two, mixing treatment of aluminum powder and nano aluminum powder: aluminum powder and nano aluminum powder are mixed according to the mass ratio of (40-80)%: (20-60)% of the raw materials are mixed uniformly in a mechanical stirring mode in advance;
step three, preparing an alkaline activator solution: pouring potassium hydroxide or sodium hydroxide powder into distilled water, mechanically stirring and mixing, and uniformly stirring to obtain an alkaline activator solution, wherein the mass ratio of the potassium hydroxide or the sodium hydroxide to the distilled water is 1: (5-7);
step four, preparing aluminum powder alkali-activated slurry: adding the fly ash and the slag powder mixed in the step one and the aluminum powder and the nano aluminum powder mixed in the step two into a mechanical stirrer, stirring uniformly, slowly adding the mixture into the alkali activator solution in the step three, stirring uniformly by using the mechanical stirrer, finally adding a polycarboxylic acid water reducing agent, and continuing stirring for 0.5-5 minutes to obtain alkali-activated slurry containing aluminum powder;
step five, forming the alkali-activated porous material: pouring the aluminum powder alkali-activated slurry obtained in the fourth step into a mold, filling the aluminum powder alkali-activated slurry into the mold in two times, and forming by adopting a manual and mechanical vibration mode to obtain a flaky alkali-activated waste residue porous material;
step six, curing the alkali-activated porous material: curing with a mold is continued after forming, and the mold is removed when the curing time is 12-36 hours; maintaining at normal temperature after removing the mold, and spraying water at set intervals to keep the surface of the test piece moist for one time; and curing for 22-40 days to obtain the finished product of the alkali-activated inorganic sponge heat-insulating fireproof plate.
2. The method for preparing the sintering-free alkali-activated inorganic sponge heat-insulating and fire-proof plate as claimed in claim 1, wherein in the first step, the particle size of the crushed slag is 1-10 μm, and the particle size of the ground fly ash is 1-8 μm.
3. The preparation method of the non-sintered alkali-activated inorganic sponge thermal-insulation fire-proof plate as claimed in claim 1 or 2, wherein in the second step, the aluminum powder and the nano-aluminum powder are uniformly mixed to obtain a light material with uniformly distributed size and pores and uniform foaming.
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| CN112408819A (en) * | 2020-11-26 | 2021-02-26 | 中国建筑材料科学研究总院有限公司 | Slag-based alkali-activated cementing material and preparation method and application thereof |
| CN113797884A (en) * | 2021-09-30 | 2021-12-17 | 东北大学 | Steel slag/fly ash composite waste slag porous adsorption material, preparation method and application |
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