CN113880516A - Non-autoclaved fly ash aerated concrete thermal insulation building block and preparation method thereof - Google Patents
Non-autoclaved fly ash aerated concrete thermal insulation building block and preparation method thereof Download PDFInfo
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- CN113880516A CN113880516A CN202111181756.7A CN202111181756A CN113880516A CN 113880516 A CN113880516 A CN 113880516A CN 202111181756 A CN202111181756 A CN 202111181756A CN 113880516 A CN113880516 A CN 113880516A
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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
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/02—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding chemical blowing agents
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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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/10—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by using foaming agents or by using mechanical means, e.g. adding preformed foam
-
- 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/02—Selection of the hardening environment
- C04B40/024—Steam hardening, e.g. in an autoclave
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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
Abstract
The invention discloses a non-autoclaved fly ash aerated concrete heat-preservation building block and a preparation method thereof, and relates to the technical field of building materials, wherein the non-autoclaved fly ash aerated concrete heat-preservation building block comprises 250-350 parts of fly ash, 55-95 parts of lime, 10-20 parts of gypsum, 80-140 parts of cement, 0.3-0.7 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 260-290 parts of water. The preparation method comprises the following steps: firstly, mixing and stirring the fly ash, the quicklime, the desulfurized gypsum, the cement and other cementing materials, and then adding water to mix and stir the mixture with the dry materials for pulping; adding aluminum powder and other additives into the slurry, fully stirring again, pouring into a mold box, and moving the mold box into a static curing chamber for static gas generation; the process uses the fly ash with large mixing amount, comprehensively utilizes the fly ash which is industrial solid waste, reduces stacking waste, solves the problem of solid waste treatment of a thermal power plant, reduces the use of other building materials, and meets the national building energy-saving development target.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to a non-autoclaved fly ash 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, most enterprises in China adopt a still kettle still-pressing mode to produce aerated concrete, however, the content of lime and cement in concrete blocks produced by the still kettle still-pressing mode is high, so that the production cost is high, and the existing still kettle still-pressing mode has the disadvantages of complex processing process, high danger coefficient and poor compression resistance of the produced concrete blocks.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a non-autoclaved fly ash aerated concrete thermal insulation block which is prepared by taking cementing materials such as fly ash, 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 purpose of the invention is realized as follows: the autoclaved fly ash aerated concrete heat-preservation building block comprises 250-350 parts of fly ash, 55-95 parts of lime, 10-20 parts of gypsum, 80-140 parts of cement, 0.3-0.7 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 260-290 parts of water.
Further, the preparation method comprises the following steps:
step 1: weighing and metering the materials according to the weight proportion, and grinding the required materials by using a ball mill; to the requirements specified by the specifications;
step 2: putting the fly ash, the cement, the lime and the gypsum into a cement paste mixer for dry stirring for a period of time, 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 form a blank;
and 4, step 4: placing the cast blank into a static curing chamber for pre-curing and standing for 5-7 hours to enable the aluminum powder and other materials to fully react and generate gas;
and 5: after the pre-curing and standing are finished, taking out the green body, and cutting the green body by using a cutting machine;
step 6: and (3) grouping the building blocks, putting the building blocks into a steam curing box for high-temperature steam curing, and then taking out the building blocks for natural curing to obtain the non-autoclaved fly ash aerated concrete thermal insulation building blocks.
Further, the content of silicon dioxide in the fly ash is 45-66%, the content of aluminum oxide is 21-28%, the content of ferric oxide is less than 5%, the content of calcium oxide is 1.5-3%, and the content of magnesium oxide is 0.3-0.8%.
Further, the gypsum is desulfurized gypsum, the lime is quicklime, the cement is portland cement, the strength grade is 42.5 grade, and the specific surface area is 350-400 m 2/kg.
Further, the mass percentage content of free calcium oxide in the fly ash is less than or equal to 3 percent; the mass percentage content of calcium oxide in the lime is more than or equal to 70 percent; the aluminum content in the aluminum powder is more than or equal to 98 percent, and the active aluminum oxide content is more than or equal to 70 percent.
Further, the sodium sulfate is anhydrous sodium sulfate, and the temperature of water is 70-95 ℃.
Further, after the gypsum is ground in a ball mill, the fineness of the gypsum 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; after the quicklime is ground in a ball mill, 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; the fineness of the fly ash meets the requirements that the screen allowance of a square-hole screen with 0.080mm is less than or equal to 25 percent, and the burning vector is less than or equal to 8 percent.
Further, the temperature of the pre-curing and standing is 55-65 ℃; the high-temperature steam curing degree is 80-95 ℃.
Further, curing under the condition of high-temperature steam, wherein the curing temperature is 80-95 ℃, and the curing time is 5-6 days; and after high-temperature and high-humidity curing, naturally curing for 5-6 days.
Compared with the prior art, the invention has the outstanding and beneficial technical effects that: the aerated concrete is prepared by the building block in a non-autoclaved mode, a simpler and more effective curing mode is adopted, the production cost is reduced on the premise that the building block still meets the standard requirement, and the building block is prepared more simply;
in addition, the fly ash is comprehensively utilized and used for replacing sand to prepare the aerated concrete heat-preservation building block, so that the waste industrial residues are changed into valuable, the accumulation waste and the environmental pollution are reduced, and the national green environmental protection concept is met; the invention adopts a non-autoclaved mode to prepare the aerated concrete, adopts the fly ash with large mixing amount, reduces the production cost and the energy consumption, and leads the preparation of the aerated concrete to be simpler and more convenient.
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 fly ash aerated concrete thermal insulation building block comprises 250 parts of fly ash, wherein the content of silicon dioxide in the fly ash is 45-66%, the content of aluminum oxide is 21-28%, the content of ferric oxide is less than 5%, the content of calcium oxide is 1.5-3%, the content of magnesium oxide is 0.3-0.8%, the mass percentage content of free calcium oxide in the fly ash is less than or equal to 3%, and the volume stability is qualified;
95 parts of quicklime, wherein the mass percentage content of calcium oxide in the quicklime is more than or equal to 70%; the storage time is not more than 3 months;
12 parts of desulfurized gypsum;
140 parts of Portland cement, wherein the strength grade is 42.5 grade, and the specific surface area is 350-400 m 2/kg;
0.3 part of aluminum powder, wherein the aluminum content in the aluminum powder is more than or equal to 98 percent, and the active aluminum oxide content is more than or equal to 70 percent;
1 part of anhydrous sodium sulfate;
0.05 part of triethanolamine;
3 parts of sodium dodecyl sulfate;
260 parts of water, and the temperature of the water is 70 ℃.
The preparation method comprises the following steps:
step 1: preparing raw materials such as a cementing material, a gas generating material and an additive required by a test, weighing and metering the required raw materials according to the weight proportion, and levigating the required materials by using a ball mill; wherein, after the gypsum is ground in a ball mill, the fineness of the gypsum meets the requirement that the screen allowance of a square-hole screen with 0.080mm is less than or equal to 20 percent; after the quicklime is ground in a ball mill, 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; the fineness of the fly ash meets the requirements that the screen allowance of a square-hole screen with 0.080mm is less than or equal to 25 percent, and the burning vector is less than or equal to 8 percent;
step 2: putting the fly ash, the cement, the lime and the gypsum into a cement paste mixer for dry stirring for a period of time, 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 form a blank;
and 4, step 4: placing the cast blank into a static curing room for pre-curing and standing for 5-7 hours at the temperature of 55-65 ℃ so that the aluminum powder and other materials are fully reacted for gas generation;
and 5: after the pre-curing and standing are finished, taking out the green body, and cutting the green body by using a cutting machine;
step 6: grouping the building blocks, putting the building blocks into a steam curing box for 6 days of high-temperature steam curing, taking the building blocks out for natural curing for 6 days, wherein the high-temperature steam curing degree is 80-95 ℃. And taking out the blocks for natural curing for 6 days to obtain the autoclaved fly ash aerated concrete thermal insulation blocks.
The dry density of the non-autoclaved aerated concrete thermal insulation block prepared by the method of the embodiment is 675kg/m3, and tests show that the compressive strength of the non-autoclaved aerated concrete thermal insulation block is 7.54MPa and the thermal conductivity coefficient is 0.127W/(m.K).
Example 2:
the autoclaved fly ash aerated concrete thermal insulation building block comprises 300 parts of fly ash, wherein the content of silicon dioxide in the fly ash is 45-66%, the content of aluminum oxide is 21-28%, the content of ferric oxide is less than 5%, the content of calcium oxide is 1.5-3%, the content of magnesium oxide is 0.3-0.8%, the mass percentage content of free calcium oxide in the fly ash is less than or equal to 3%, and the volume stability is qualified;
75 parts of quicklime, wherein the mass percentage content of calcium oxide in the quicklime is more than or equal to 70%; the storage time is not more than 3 months;
15 parts of desulfurized gypsum;
100 parts of Portland cement, wherein the strength grade is 42.5 grade, and the specific surface area is 350-400 m 2/kg;
0.5 part of aluminum powder, wherein the aluminum content in the aluminum powder is more than or equal to 98 percent, and the active aluminum oxide content is more than or equal to 70 percent;
1.5 parts of anhydrous sodium sulfate;
0.4 part of triethanolamine;
3.5 parts of sodium dodecyl sulfate;
275 parts of water and 90 ℃ of water.
The preparation method comprises the following steps:
step 1: preparing raw materials such as a cementing material, a gas generating material and an additive required by a test, weighing and metering the required raw materials according to the weight proportion, and levigating the required materials by using a ball mill; wherein, after the gypsum is ground in a ball mill, the fineness of the gypsum meets the requirement that the screen allowance of a square-hole screen with 0.080mm is less than or equal to 20 percent; after the quicklime is ground in a ball mill, 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; the fineness of the fly ash meets the requirements that the screen allowance of a square-hole screen with 0.080mm is less than or equal to 25 percent, and the burning vector is less than or equal to 8 percent;
step 2: putting the fly ash, the cement, the lime and the gypsum into a cement paste mixer for dry stirring for a period of time, 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 form a blank;
and 4, step 4: placing the cast blank into a static curing room for pre-curing and standing for 5-7 hours at the temperature of 55-65 ℃ so that the aluminum powder and other materials are fully reacted for gas generation;
and 5: after the pre-curing and standing are finished, taking out the green body, and cutting the green body by using a cutting machine;
step 6: grouping the building blocks, putting the building blocks into a steam curing box for 5 days of high-temperature steam curing, taking the building blocks out for natural curing for 6 days, wherein the high-temperature steam curing degree is 80-95 ℃. And taking out the blocks for natural curing for 5 days to obtain the autoclaved fly ash aerated concrete thermal insulation blocks.
The dry density of the non-autoclaved aerated concrete thermal insulation block prepared by the method of the embodiment is 693kg/m3, and the test shows that the compressive strength of the non-autoclaved aerated concrete thermal insulation block is 7.07MPa and the thermal conductivity coefficient is 0.129W/(m.K).
Example 3:
the autoclaved fly ash aerated concrete heat-insulation building block comprises 350 parts of fly ash, wherein the content of silicon dioxide in the fly ash is 45-66%, the content of aluminum oxide is 21-28%, the content of ferric oxide is less than 5%, the content of calcium oxide is 1.5-3%, the content of magnesium oxide is 0.3-0.8%, the mass percentage content of free calcium oxide in the fly ash is less than or equal to 3%, and the volume stability is qualified;
55 parts of quicklime, wherein the mass percentage content of calcium oxide in the quicklime is more than or equal to 70%; the storage time is not more than 3 months;
18 parts of desulfurized gypsum;
80 parts of Portland cement, wherein the strength grade is 42.5 grade, and the specific surface area is 350-400 m 2/kg;
0.7 part of aluminum powder, wherein the aluminum content in the aluminum powder is more than or equal to 98 percent, and the active aluminum oxide content is more than or equal to 70 percent;
2 parts of anhydrous sodium sulfate;
0.15 part of triethanolamine;
4 parts of sodium dodecyl sulfate;
290 parts of water and 85 ℃ of water.
The preparation method comprises the following steps:
step 1: preparing raw materials such as a cementing material, a gas generating material and an additive required by a test, weighing and metering the required raw materials according to the weight proportion, and levigating the required materials by using a ball mill; wherein, after the gypsum is ground in a ball mill, the fineness of the gypsum meets the requirement that the screen allowance of a square-hole screen with 0.080mm is less than or equal to 20 percent; after the quicklime is ground in a ball mill, 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; the fineness of the fly ash meets the requirements that the screen allowance of a square-hole screen with 0.080mm is less than or equal to 25 percent, and the burning vector is less than or equal to 8 percent;
step 2: putting the fly ash, the cement, the lime and the gypsum into a cement paste mixer for dry stirring for a period of time, 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 form a blank;
and 4, step 4: placing the cast blank into a static curing room for pre-curing and standing for 5-7 hours at the temperature of 55-65 ℃ so that the aluminum powder and other materials are fully reacted for gas generation;
and 5: after the pre-curing and standing are finished, taking out the green body, and cutting the green body by using a cutting machine;
step 6: grouping the building blocks, putting the building blocks into a steam curing box for 6 days of high-temperature steam curing, taking the building blocks out for natural curing for 6 days, wherein the high-temperature steam curing degree is 80-95 ℃. And taking out the blocks for natural curing for 6 days to obtain the autoclaved fly ash aerated concrete thermal insulation blocks.
The dry density of the non-autoclaved aerated concrete thermal insulation block prepared by the method of the embodiment is 680kg/m3, and tests show that the compressive strength of the non-autoclaved aerated concrete thermal insulation block is 6.36MPa, and the thermal conductivity coefficient is 0.134W/(m.K).
As the non-autoclaved aerated concrete at present has no specific implementation specification and is carried out according to the test specification of the autoclaved aerated concrete block, the three groups of embodiments all conform to the specification of the autoclaved aerated concrete block, compared with the existing autoclaved aerated concrete block, the fly ash disclosed by the invention has the advantages of larger usage amount, cost saving, better compressive strength and heat conductivity coefficient than the autoclaved aerated concrete block, simpler preparation direction and easiness in implementation.
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 fly ash aerated concrete thermal insulation building block and the manufacturing method thereof are characterized in that: the heat-insulation building block comprises 250-350 parts of fly ash, 55-95 parts of lime, 10-20 parts of gypsum, 80-140 parts of cement, 0.3-0.7 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 260-290 parts of water;
the preparation method of the heat-insulation building block comprises the following steps:
step 1: weighing and metering the materials according to the weight proportion, and grinding the required materials by using a ball mill; to the requirements specified by the specifications;
step 2: putting the fly ash, the cement, the lime and the gypsum into a cement paste mixer for dry stirring for a period of time, 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 form a blank;
and 4, step 4: placing the cast blank into a static curing chamber for pre-curing and standing for 5-7 hours to enable the aluminum powder and other materials to fully react and generate gas;
and 5: after the pre-curing and standing are finished, taking out the green body, and cutting the green body by using a cutting machine;
step 6: and (3) grouping the building blocks, putting the building blocks into a steam curing box for high-temperature steam curing, and then taking out the building blocks for natural curing to obtain the non-autoclaved fly ash aerated concrete thermal insulation building blocks.
2. The autoclaved fly ash aerated concrete thermal insulation block and the manufacturing method thereof as claimed in claim 1, wherein the autoclaved fly ash aerated concrete thermal insulation block is characterized in that: in the fly ash, the content of silicon dioxide is 45-66%, the content of aluminum oxide is 21-28%, the content of ferric oxide is less than 5%, the content of calcium oxide is 1.5-3%, and the content of magnesium oxide is 0.3-0.8%.
3. The autoclaved fly ash aerated concrete thermal insulation block and the manufacturing method thereof as claimed in claim 1, wherein the autoclaved fly ash aerated concrete thermal insulation block is characterized in that: the gypsum is desulfurized gypsum, the lime is quicklime, the cement is portland cement, the strength grade is 42.5 grade, and the specific surface area is 350-400 m 2/kg.
4. The autoclaved fly ash aerated concrete thermal insulation block and the manufacturing method thereof as claimed in claim 1, wherein the autoclaved fly ash aerated concrete thermal insulation block is characterized in that: the mass percentage of free calcium oxide in the fly ash is less than or equal to 3 percent; the mass percentage content of calcium oxide in the lime is more than or equal to 70 percent; the aluminum content in the aluminum powder is more than or equal to 98 percent, and the active aluminum oxide content is more than or equal to 70 percent.
5. The autoclaved fly ash aerated concrete thermal insulation block and the manufacturing method thereof as claimed in claim 1, wherein the autoclaved fly ash aerated concrete thermal insulation block is characterized in that: the sodium sulfate is anhydrous sodium sulfate, and the temperature of water is 70-95 ℃.
6. The autoclaved fly ash aerated concrete thermal insulation block and the manufacturing method thereof as claimed in claim 2, wherein the autoclaved fly ash aerated concrete thermal insulation block is characterized in that: after the gypsum is ground in a ball mill, the fineness of the gypsum 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; after the quicklime is ground in a ball mill, 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; the fineness of the fly ash meets the requirements that the screen allowance of a square-hole screen with 0.080mm is less than or equal to 25 percent, and the burning vector is less than or equal to 8 percent.
7. The autoclaved fly ash aerated concrete thermal insulation block and the manufacturing method thereof as claimed in claim 2, wherein the autoclaved fly ash aerated concrete thermal insulation block is characterized in that: the temperature of pre-curing and standing is 55-65 ℃; and (5) curing under the condition of high-temperature steam, wherein the curing temperature is 80-95 ℃.
8. The autoclaved fly ash aerated concrete thermal insulation block and the manufacturing method thereof as claimed in claim 2, wherein the autoclaved fly ash aerated concrete thermal insulation block is characterized in that: the high-temperature steam curing degree is 80-95 ℃, the curing time is 5-6 days, and then natural curing is carried out for 5-6 days.
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| CN114213096A (en) * | 2022-01-13 | 2022-03-22 | 太原钢铁(集团)有限公司 | Preparation method of fly ash autoclaved aerated concrete building block with hydrogen peroxide as foaming agent |
| CN114988835A (en) * | 2022-06-17 | 2022-09-02 | 华润水泥技术研发有限公司 | Carbide slag-based high-solid-carbon-content non-autoclaved aerated concrete and preparation method thereof |
| CN115477528A (en) * | 2022-10-13 | 2022-12-16 | 东南大学 | Environment-friendly autoclaved aerated concrete block and preparation method thereof |
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| CN101581131A (en) * | 2009-06-10 | 2009-11-18 | 重庆交通大学 | Non-autoclaved aerated concrete building block and manufacturing method |
| CN110627465A (en) * | 2019-09-29 | 2019-12-31 | 贵州兴电新型建材有限公司 | Manufacturing process of autoclaved aerated concrete |
| CN112430050A (en) * | 2020-11-26 | 2021-03-02 | 江苏建筑职业技术学院 | Non-autoclaved aerated concrete and preparation method thereof |
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| CN115477528A (en) * | 2022-10-13 | 2022-12-16 | 东南大学 | Environment-friendly autoclaved aerated concrete block and preparation method thereof |
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