CN113716931A - Non-autoclaved silicomanganese slag aerated concrete thermal insulation building block and preparation method thereof - Google Patents
Non-autoclaved silicomanganese slag aerated concrete thermal insulation building block and preparation method thereof Download PDFInfo
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- CN113716931A CN113716931A CN202111193407.7A CN202111193407A CN113716931A CN 113716931 A CN113716931 A CN 113716931A CN 202111193407 A CN202111193407 A CN 202111193407A CN 113716931 A CN113716931 A CN 113716931A
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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
- C04B28/14—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 calcium sulfate cements
- C04B28/142—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 calcium sulfate cements containing synthetic or waste calcium sulfate cements
- C04B28/144—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 calcium sulfate cements containing synthetic or waste calcium sulfate cements the synthetic calcium sulfate being a flue gas desulfurization product
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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
- 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
- C04B18/14—Waste materials; Refuse from metallurgical processes
- C04B18/141—Slags
- C04B18/144—Slags from the production of specific metals other than iron or of specific alloys, e.g. ferrochrome slags
-
- 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
- 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
- C04B18/14—Waste materials; Refuse from metallurgical processes
- C04B18/146—Silica fume
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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
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
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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
- C04B2201/30—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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- 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
Abstract
The invention discloses a non-autoclaved silicomanganese slag aerated concrete thermal insulation block and a preparation method thereof, belonging to the technical field of building materials, wherein the non-autoclaved silicomanganese slag aerated concrete thermal insulation block comprises the following raw materials in parts by weight: 75-85 parts of silicomanganese slag, 40-50 parts of silica fume, 30-40 parts of lime, 55-70 parts of cement, 5-10 parts of gypsum, 0.2-0.3 part of aluminum powder, 1-2 parts of sodium sulfate, 0.05-0.15 part of triethanolamine, 3-4 parts of sodium dodecyl sulfate and 110-130 parts of water, wherein the preparation method comprises the following steps: putting the ball-milled silicomanganese slag, cement, gypsum and other cementing materials into a stirrer for dry stirring; after fully mixing, adding water and stirring to prepare slurry, and adding aluminum powder into the slurry and fully and quickly stirring; pouring the slurry into a mold for standing and pre-curing; and cutting the blank, and curing. The process applies the silicomanganese slag to the preparation of aerated concrete instead of fly ash, solves the problem of low content of active SiO2 in the silicomanganese slag, not only solves the problem of fly ash shortage in certain areas, but also reduces the accumulation pollution of the silicomanganese slag.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to a non-autoclaved silicomanganese slag aerated concrete thermal insulation building block and a preparation method thereof.
Background
China is a large energy consumption country of buildings, and new building materials which are more energy-saving and environment-friendly are needed for buildings in order to respond to the national green and environment-friendly concept and 65 percent of building energy-saving targets. At present, the problem of resource shortage of fly ash occurs in many places, and other industrial solid wastes such as silicomanganese slag and the like are seriously accumulated, so that the recycling of waste residues becomes a great problem. In addition, most enterprises in China currently adopt a still kettle still pressing mode to produce aerated concrete, the production cost is high, the productivity is high, and a high danger coefficient exists.
Disclosure of Invention
The invention aims to provide a non-autoclaved silicomanganese slag aerated concrete thermal insulation building block and a preparation method thereof, and mainly aims to comprehensively utilize industrial solid wastes namely silicomanganese slag and silica fume and realize effective utilization of resources.
The purpose of the invention is realized as follows: the autoclaved silicomanganese slag aerated concrete thermal insulation building block comprises the following raw materials in parts by weight: 75-85 parts of silicomanganese slag, 40-50 parts of silica fume, 30-40 parts of lime, 55-70 parts of cement, 5-10 parts of gypsum, 0.2-0.3 part of aluminum powder, 1-2 parts of sodium sulfate, 0.05-0.15 part of triethanolamine, 3-4 parts of sodium dodecyl sulfate and 110-130 parts of water.
Further, the silicon-manganese slag contains 30-45% of silicon dioxide, 5-10% of aluminum oxide, less than 1% of ferric oxide, 20-30% of calcium oxide, 10-15% of magnesium oxide and less than 15% of manganese oxide.
Further, the silica content in the silica fume is > 92%; the gypsum is desulfurized gypsum, and the lime is quicklime.
Further, the cement is portland cement, the strength grade is 42.5 grade, and the specific surface area is 357m 2/kg; the weight percentage content of calcium oxide in the lime is more than or equal to 70 percent, and the storage time is not more than three months; the Al content in the aluminum powder is more than or equal to 98 percent, and the active Al2O3 content is more than or equal to 70 percent; the sodium sulfate is an early strength agent, and the sodium sulfate is anhydrous sodium sulfate; the temperature of the water is 60-75 ℃.
Further, the preparation method of the non-autoclaved silicomanganese slag aerated concrete thermal insulation building block comprises the following steps:
step 1: crushing the required materials by using a ball mill, and weighing and metering the required raw materials according to the weight part ratio;
step 2: putting the silicomanganese slag, the silica fume, the cement, the lime and the gypsum into a cement paste mixer for dry stirring, fully mixing, adding water and stirring to prepare slurry;
and step 3: adding aluminum powder into the slurry, quickly and fully stirring again, and pouring the mixture into a mold at a certain temperature after the slurry is fully mixed to prepare a blank;
and 4, step 4: placing the cast blank into a static curing room for pre-curing and standing for 5-6 hours;
and 5: after the pre-curing and standing are finished, taking out the green body, and cutting the green body into building blocks by using a cutting machine;
step 6: and (5) putting the building blocks into a steam curing box for high-temperature steam curing for 6 days.
Furthermore, after the silicomanganese slag, the siliceous dust, the gypsum and the quicklime are ground in a ball mill, the fineness of the materials meets the requirement that the screen allowance of a square-hole screen with 0.080mm is less than or equal to 20 percent.
Further, in the step 5, the temperature of the pre-curing and standing is 55-65 ℃.
Further, in the step 6, the high-temperature steam curing temperature is 80-95 ℃.
Compared with the prior art, the invention has the outstanding and beneficial technical effects that: the invention provides a lightweight high-strength porous silicate building block prepared by adopting silicomanganese slag and silica fume to replace fly ash, taking cementing materials such as silicomanganese slag, silica fume, cement, lime, gypsum and the like as main raw materials, taking aluminum powder as a gas former, taking triethanolamine, sodium sulfate and the like as additives to regulate slurry reaction, and carrying out the processes of stirring, pouring, standing for precuring, cutting, high-temperature steam curing and the like.
The invention comprehensively utilizes the silicomanganese slag and the silica fume, and replaces the fly ash with the silicomanganese slag and the silica fume to prepare the aerated concrete heat-insulating building block, thereby reducing the accumulation waste and the environmental pollution; the invention adopts a non-autoclaved mode to prepare the aerated concrete, and replaces an autoclave with a steam curing box or a static curing chamber for curing, thereby reducing the production cost and the energy consumption and enabling the preparation of the aerated concrete to be simpler and more convenient.
The non-autoclaved silicomanganese slag and silica fume aerated concrete thermal insulation building block disclosed by the invention is light in weight, low in heat conductivity coefficient, high in fire resistance, and good in thermal insulation and sound insulation effects; meanwhile, a large amount of solid waste silicomanganese slag is doped into the building block, so that the problem of shortage of fly ash resources in partial regions and the problem of comprehensive utilization of industrial solid waste silicomanganese slag are effectively solved, and accumulation waste is reduced; the building block is also doped with a proper amount of industrial solid waste silica fume, so that the problem of low content of active SiO2 in the silicomanganese slag is solved, and the cost is reduced.
Meanwhile, the aerated concrete is prepared by adopting a non-autoclaved mode, a simpler and more effective curing mode is adopted, and on the premise that the building block still meets the standard requirement, the production cost is reduced, and the building block is simpler to prepare.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiments of the present invention is clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
the autoclaved silicomanganese slag aerated concrete heat-preservation building block comprises, by weight, 80 parts of silicomanganese slag, 45 parts of silica fume, 35 parts of quick lime, 62 parts of cement, 7 parts of desulfurized gypsum, 0.25 part of aluminum powder, 1.5 parts of anhydrous sodium sulfate, 0.1 part of triethanolamine, 3.5 parts of sodium dodecyl sulfate and 120 parts of water;
wherein the silicon-manganese slag contains 30-45% of silicon dioxide, 5-10% of aluminum oxide, less than 1% of ferric oxide, 20-30% of calcium oxide, 10-15% of magnesium oxide and less than 15% of manganese oxide; the silica content in the silica fume is more than 92%; the gypsum is desulfurized gypsum, and the lime is quicklime; the cement is portland cement, the strength grade is 42.5 grade, and the specific surface area is 357m 2/kg; the weight percentage content of calcium oxide in the lime is more than or equal to 70 percent, and the storage time is not more than three months; the Al content in the aluminum powder is more than or equal to 98 percent, and the active Al2O3 content is more than or equal to 70 percent; the sodium sulfate is an early strength agent, and the sodium sulfate is anhydrous sodium sulfate; the temperature of the water was 60 ℃.
The preparation method of the autoclaved silicomanganese slag-free aerated concrete heat-preservation building block specifically comprises the following steps:
step 1, grinding silicomanganese slag, siliceous dust, gypsum and quicklime by using a ball mill until the fineness meets the requirement that the screen allowance of a square-hole screen with the fineness of 0.080mm is less than or equal to 20 percent, and then weighing the components;
step 2, putting the finely ground silicomanganese slag, silica fume, cement, quicklime and desulfurized gypsum into a cement paste mixer for dry stirring for a period of time, fully mixing, adding water and stirring to prepare slurry;
step 3, adding aluminum powder into the slurry, quickly and fully stirring again, and pouring the mixture into a mold at 55 ℃ after the slurry is fully mixed, so that a blank is molded;
step 4, placing the cast blank into a static curing room at 60 ℃ for pre-curing and standing for 6 hours to ensure that the aluminum powder and other cementing materials are fully reacted and gasified;
step 5, after the pre-curing and the standing are finished, taking out the green body, and cutting the green body into building blocks with the specification and the size required by the test by using a cutting machine;
and 6, grouping the building blocks, putting the building blocks into a steam curing box, and curing for 6 days at the high-temperature steam temperature of 85 ℃ to obtain the autoclaved silicomanganese slag-free aerated concrete heat-preservation building blocks.
In the embodiment, the dry density of the non-autoclaved silicomanganese slag aerated concrete heat-preservation building block is 748kg/m3, the compressive strength is 6.42MPa, and the heat conductivity coefficient is 0.127W/(m.K).
Example 2:
the non-autoclaved silicomanganese slag aerated concrete heat-preservation building block comprises 85 parts of silicomanganese slag, 45 parts of silica fume, 37 parts of quick lime, 55 parts of cement, 7 parts of desulfurized gypsum, 0.25 part of aluminum powder, 1.5 parts of anhydrous sodium sulfate, 0.1 part of triethanolamine, 3.5 parts of lauryl sodium sulfate and 120 parts of water;
wherein the silicon-manganese slag contains 30-45% of silicon dioxide, 5-10% of aluminum oxide, less than 1% of ferric oxide, 20-30% of calcium oxide, 10-15% of magnesium oxide and less than 15% of manganese oxide; the silica content in the silica fume is more than 92%; the gypsum is desulfurized gypsum, and the lime is quicklime; the cement is portland cement, the strength grade is 42.5 grade, and the specific surface area is 357m 2/kg; the weight percentage content of calcium oxide in the lime is more than or equal to 70 percent, and the storage time is not more than three months; the Al content in the aluminum powder is more than or equal to 98 percent, and the active Al2O3 content is more than or equal to 70 percent; the sodium sulfate is an early strength agent, and the sodium sulfate is anhydrous sodium sulfate; the temperature of the water was 75 ℃.
The preparation method of the autoclaved silicomanganese slag-free aerated concrete heat-preservation building block specifically comprises the following steps:
step 1, grinding silicomanganese slag, siliceous dust, gypsum and quicklime by using a ball mill until the fineness meets the requirement that the screen allowance of a square-hole screen with the fineness of 0.080mm is less than or equal to 20 percent, and then weighing the components;
step 2, putting the finely ground silicomanganese slag, silica fume, cement, quicklime and desulfurized gypsum into a cement paste mixer for dry stirring for a period of time, fully mixing, adding water and stirring to prepare slurry;
step 3, adding aluminum powder into the slurry, quickly and fully stirring again, and pouring the mixture into a mold at 55 ℃ after the slurry is fully mixed, so that a blank is molded;
step 4, placing the cast blank into a static curing room at 60 ℃ for pre-curing and standing for 6 hours to ensure that the aluminum powder and other cementing materials are fully reacted and gasified;
step 5, after the pre-curing and the standing are finished, taking out the green body, and cutting the green body into building blocks with the specification and the size required by the test by using a cutting machine;
and 6, grouping the building blocks, putting the building blocks into a steam curing box, and curing for 6 days at the high-temperature steam temperature of 85 ℃ to obtain the autoclaved silicomanganese slag-free aerated concrete heat-preservation building blocks.
In the embodiment, the dry density of the non-autoclaved silicomanganese slag aerated concrete heat-preservation building block is 723kg/m3, the compressive strength is 6.35MPa, and the heat conductivity coefficient is 0.129W/(m.K).
Example 3.
The non-autoclaved silicomanganese slag aerated concrete heat-preservation building block comprises 75 parts of silicomanganese slag, 45 parts of silica fume, 32 parts of quick lime, 70 parts of cement, 7 parts of desulfurized gypsum, 0.25 part of aluminum powder, 1.5 parts of anhydrous sodium sulfate, 0.1 part of triethanolamine, 3.5 parts of lauryl sodium sulfate and 120 parts of water;
wherein the silicon-manganese slag contains 30-45% of silicon dioxide, 5-10% of aluminum oxide, less than 1% of ferric oxide, 20-30% of calcium oxide, 10-15% of magnesium oxide and less than 15% of manganese oxide; the silica content in the silica fume is more than 92%; the gypsum is desulfurized gypsum, and the lime is quicklime; the cement is portland cement, the strength grade is 42.5 grade, and the specific surface area is 357m 2/kg; the weight percentage content of calcium oxide in the lime is more than or equal to 70 percent, and the storage time is not more than three months; the Al content in the aluminum powder is more than or equal to 98 percent, and the active Al2O3 content is more than or equal to 70 percent; the sodium sulfate is an early strength agent, and the sodium sulfate is anhydrous sodium sulfate; the temperature of the water was 75 ℃.
The preparation method of the autoclaved silicomanganese slag-free aerated concrete heat-preservation building block specifically comprises the following steps:
step 1, grinding silicomanganese slag, siliceous dust, gypsum and quicklime by using a ball mill until the fineness meets the requirement that the screen allowance of a square-hole screen with the fineness of 0.080mm is less than or equal to 20 percent, and then weighing the components;
step 2, putting the finely ground silicomanganese slag, silica fume, cement, quicklime and desulfurized gypsum into a cement paste mixer for dry stirring for a period of time, fully mixing, adding water and stirring to prepare slurry;
step 3, adding aluminum powder into the slurry, quickly and fully stirring again, and pouring the mixture into a mold at 55 ℃ after the slurry is fully mixed, so that a blank is molded;
step 4, placing the cast blank into a static curing room at 60 ℃ for pre-curing and standing for 6 hours to ensure that the aluminum powder and other cementing materials are fully reacted and gasified;
step 5, after the pre-curing and the standing are finished, taking out the green body, and cutting the green body into building blocks with the specification and the size required by the test by using a cutting machine;
and 6, grouping the building blocks, putting the building blocks into a steam curing box, and curing for 6 days at the high-temperature steam temperature of 85 ℃ to obtain the autoclaved silicomanganese slag-free aerated concrete heat-preservation building blocks.
In the embodiment, the dry density of the non-autoclaved silicomanganese slag aerated concrete heat-preservation building block is 743kg/m3, the compressive strength is 5.74MPa, and the heat conductivity coefficient is 0.134W/(m.K).
Compared with the conventional fly ash thermal insulation building block, the non-autoclaved aerated concrete thermal insulation building block prepared by completely replacing fly ash with silicomanganese slag and silica fume under the same production and maintenance conditions has the advantages that the main performances such as compressive strength, heat conductivity coefficient and the like are greatly improved.
As the existing non-autoclaved aerated concrete has no specific implementation specification and is carried out according to the test specification of the autoclaved aerated concrete block, and as the three formulas basically accord with the specification of the autoclaved aerated concrete block, the silicomanganese slag can be fully utilized from the engineering practical point of view, the waste is changed into the valuable, and the formula with the large content of the silicomanganese slag is more preferable.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Claims (8)
1. The autoclaved silicomanganese slag aerated concrete heat-preservation building block is characterized by comprising the following raw materials in parts by weight: 75-85 parts of silicomanganese slag, 40-50 parts of silica fume, 30-40 parts of lime, 55-70 parts of cement, 5-10 parts of gypsum, 0.2-0.3 part of aluminum powder, 1-2 parts of sodium sulfate, 0.05-0.15 part of triethanolamine, 3-4 parts of sodium dodecyl sulfate and 110-130 parts of water.
2. The autoclaved silicomanganese slag aerated concrete thermal insulation block as claimed in claim 1, wherein the silicomanganese slag contains 30-45% of silicon dioxide, 5-10% of aluminum oxide, less than 1% of ferric oxide, 20-30% of calcium oxide, 10-15% of magnesium oxide and less than 15% of manganese oxide.
3. The autoclaved silicomanganese slag aerated concrete thermal insulation block as claimed in claim 1, wherein the silica content in the silica fume is more than 92%; the gypsum is desulfurized gypsum, and the lime is quicklime.
4. The autoclaved silicomanganese slag aerated concrete thermal insulation block as claimed in claim 1, wherein the cement is portland cement, the strength grade is 42.5 grade, and the specific surface area is 357m 2/kg; the weight percentage content of calcium oxide in the lime is more than or equal to 70 percent, and the storage time is not more than three months; the Al content in the aluminum powder is more than or equal to 98 percent, and the active Al2O3 content is more than or equal to 70 percent; the sodium sulfate is an early strength agent, and the sodium sulfate is anhydrous sodium sulfate; the temperature of the water is 60-75 ℃.
5. The preparation method of the non-autoclaved silicomanganese slag aerated concrete thermal insulation building block according to any one of claims 1 to 4, characterized by comprising the following steps:
step 1: crushing the required materials by using a ball mill, and weighing and metering the required raw materials according to the weight part ratio;
step 2: putting the silicomanganese slag, the silica fume, the cement, the lime and the gypsum into a cement paste mixer for dry stirring, fully mixing, adding water and stirring to prepare slurry;
and step 3: adding aluminum powder into the slurry, quickly and fully stirring again, and pouring the mixture into a mold at a certain temperature after the slurry is fully mixed to prepare a blank;
and 4, step 4: placing the cast blank into a static curing room for pre-curing and standing for 5-6 hours;
and 5: after the pre-curing and standing are finished, taking out the green body, and cutting the green body into building blocks by using a cutting machine;
step 6: and (5) putting the building blocks into a steam curing box for high-temperature steam curing for 6 days.
6. The preparation method of the non-autoclaved silicomanganese slag aerated concrete thermal insulation building block according to claim 5, wherein after the silicomanganese slag, the silica fume, the gypsum and the quicklime are ground in a ball mill, the fineness of the silicomanganese slag, the silica fume, the gypsum and the quicklime all meet the requirement that the screen allowance of a square-hole screen of 0.080mm is less than or equal to 20%.
7. The preparation method of the non-autoclaved silicomanganese slag aerated concrete thermal insulation block according to claim 5, wherein in the step 5, the temperature of pre-curing and standing is 55-65 ℃.
8. The preparation method of the non-autoclaved silicomanganese slag aerated concrete thermal insulation block according to claim 5, wherein in the step 6, the high-temperature steam curing temperature is 80-95 ℃.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114195465A (en) * | 2021-12-24 | 2022-03-18 | 上海建工建材科技集团股份有限公司 | Steam-curing-free concrete for C40 prefabricated part and preparation method thereof |
| CN114368956A (en) * | 2022-01-27 | 2022-04-19 | 单成敏 | Self-heat-preservation ALC aerated concrete wallboard and preparation method thereof |
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