CN115477528A - Environment-friendly autoclaved aerated concrete block and preparation method thereof - Google Patents
Environment-friendly autoclaved aerated concrete block and preparation method thereof Download PDFInfo
- Publication number
- CN115477528A CN115477528A CN202211251281.9A CN202211251281A CN115477528A CN 115477528 A CN115477528 A CN 115477528A CN 202211251281 A CN202211251281 A CN 202211251281A CN 115477528 A CN115477528 A CN 115477528A
- Authority
- CN
- China
- Prior art keywords
- aerated concrete
- portions
- concrete block
- environment
- curing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000004567 concrete Substances 0.000 title claims abstract description 58
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 239000011449 brick Substances 0.000 claims abstract description 40
- 239000000843 powder Substances 0.000 claims abstract description 30
- 239000010881 fly ash Substances 0.000 claims abstract description 29
- 239000011268 mixed slurry Substances 0.000 claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 25
- 238000002156 mixing Methods 0.000 claims abstract description 24
- 239000002994 raw material Substances 0.000 claims abstract description 22
- 239000010440 gypsum Substances 0.000 claims abstract description 21
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 21
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 20
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 20
- 239000004571 lime Substances 0.000 claims abstract description 20
- 239000004568 cement Substances 0.000 claims abstract description 14
- 239000006260 foam Substances 0.000 claims abstract description 14
- 239000003381 stabilizer Substances 0.000 claims abstract description 14
- 239000002699 waste material Substances 0.000 claims abstract description 13
- 239000000203 mixture Substances 0.000 claims abstract description 12
- 239000004927 clay Substances 0.000 claims abstract description 10
- 238000005520 cutting process Methods 0.000 claims abstract description 6
- 238000000465 moulding Methods 0.000 claims abstract description 5
- 238000003756 stirring Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 6
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 5
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 5
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical group C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 4
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 4
- 229910052708 sodium Inorganic materials 0.000 claims description 4
- 239000011734 sodium Substances 0.000 claims description 4
- 230000003068 static effect Effects 0.000 claims description 4
- 238000000498 ball milling Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 239000011398 Portland cement Substances 0.000 claims description 2
- 239000010754 BS 2869 Class F Substances 0.000 claims 2
- 238000009413 insulation Methods 0.000 abstract description 10
- 238000004321 preservation Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000005266 casting Methods 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 8
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000000047 product Substances 0.000 description 6
- 238000011056 performance test Methods 0.000 description 5
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 4
- 238000000227 grinding Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 229910052938 sodium sulfate Inorganic materials 0.000 description 4
- 235000011152 sodium sulphate Nutrition 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- 239000002956 ash Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000007873 sieving Methods 0.000 description 3
- 229910021653 sulphate ion Inorganic materials 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000011381 foam concrete Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Classifications
-
- 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
-
- 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
- C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
- C04B18/08—Flue dust, i.e. fly ash
-
- 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
- C04B18/16—Waste materials; Refuse from building or ceramic industry
-
- 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
- C04B2111/00017—Aspects relating to the protection of the environment
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
-
- 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
-
- 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
-
- 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 an environment-friendly autoclaved aerated concrete block and a preparation method thereof, wherein the block comprises the following raw materials in parts by mass: 100 to 180 portions of fly ash, 50 to 80 portions of regenerated brick powder, 40 to 60 portions of cement, 40 to 70 portions of lime, 20 to 40 portions of gypsum, 0.2 to 0.7 portion of aluminum powder, 0.05 to 0.2 portion of foam stabilizer and 200 to 300 portions of water, and the preparation method comprises the following steps: mixing fly ash, recycled brick powder, cement, lime and gypsum to obtain a raw material mixture; mixing aluminum powder, a foam stabilizer and water to obtain an aluminum powder solution; mixing the raw material mixture with the rest water to obtain mixed slurry A; mixing the aluminum powder solution with the mixed slurry A to obtain mixed slurry B; curing the mixed slurry B in a curing chamber after casting molding, demolding and cutting to obtain a blank; and (5) carrying out autoclaved curing on the blank to obtain the building block. According to the invention, the recycled brick powder is added in the production of the aerated concrete, so that the resource utilization of the waste clay bricks is realized, the cost of the aerated concrete is effectively reduced, and the performances of strength, heat preservation, heat insulation, sound insulation and the like of the aerated concrete block are improved by optimizing the raw material proportion.
Description
Technical Field
The invention relates to concrete and a preparation method thereof, in particular to an environment-friendly autoclaved aerated concrete block and a preparation method thereof.
Background
The development of wall heat-insulating materials has very important significance for building energy conservation. In recent years, as a novel wall thermal insulation material with low energy consumption and environmental protection, the aerated concrete block is rapidly developed due to the advantages of light weight, high strength, good thermal insulation performance, good earthquake resistance, good sound insulation performance, low cost and the like. The aerated concrete block is a light porous silicate product prepared by taking a calcareous material and a siliceous material as main raw materials, adding an air entraining agent, and performing processes of stirring, pouring, standing curing, pre-curing, autoclaved curing and the like, however, the aerated concrete block which meets the requirements on strength, thermal conductivity and dry density and is low in cost is rare.
In addition, with the continuous promotion of the urbanization and new infrastructure process of the world, huge amount of construction waste is generated. One of the main sources of construction waste is the demolition of waste houses, which are mainly built in recent decades, the main building materials are clay bricks, a large amount of clay bricks are abandoned along with the demolition of buildings, which accounts for more than 50% of the total construction waste, the accumulation of a large amount of clay bricks not only occupies the space of urban activities but also is harmful to the environment, and how to effectively treat and reasonably recycle the abandoned clay bricks becomes a problem to be solved urgently. At present, the regenerated brick powder formed by crushing and ball-milling waste clay bricks is mainly applied to foam concrete and is formed through normal-pressure curing, and the regenerated brick powder is not applied to aerated concrete.
Disclosure of Invention
The purpose of the invention is as follows: in order to solve the technical problems in the prior art, the invention aims to provide the autoclaved aerated concrete with excellent heat insulation performance and environment friendliness, and further provides a preparation method of the autoclaved aerated concrete.
The technical scheme is as follows: the environment-friendly autoclaved aerated concrete block comprises the following raw materials in parts by mass: 100 to 180 portions of fly ash, 50 to 80 portions of regenerated brick powder, 40 to 60 portions of cement, 40 to 70 portions of lime, 20 to 40 portions of gypsum, 0.2 to 0.7 portion of aluminum powder, 0.05 to 0.2 portion of foam stabilizer and 200 to 300 portions of water.
Furthermore, the regenerated brick powder is prepared by crushing waste clay bricks by a jaw crusher and then ball-milling the crushed waste clay bricks for 30 to 40 minutes by a roller ball mill, the particle size is less than 100 meshes, the water content is less than or equal to 0.1 percent, and preferably 50 to 70 parts, so that the particle size distribution can be optimized.
Further, the fly ash is F-class I-grade fly ash or F-class II-grade fly ash, preferably 140-180 parts, the cement is portland cement, preferably, the foam stabilizer is fatty alcohol-polyoxyethylene ether sodium sulfate, preferably 0.1-0.2 part.
Further, the gypsum is preferably 30 to 40 parts, the aluminum powder is preferably 0.4 to 0.7 part,
the preparation method of the environment-friendly autoclaved aerated concrete block comprises the following steps:
(1) Mixing fly ash, recycled brick powder, cement, lime and gypsum together to obtain a raw material mixture;
(2) Mixing and stirring aluminum powder, a foam stabilizer and the first part of water uniformly to obtain an aluminum powder solution;
(3) Mixing the raw material mixture with the rest water to obtain mixed slurry A;
(4) Stirring and mixing the aluminum powder solution and the mixed slurry A together to obtain mixed slurry B;
(5) After pouring and forming, the mixed slurry B is subjected to static curing and heating pre-curing in a curing chamber, and demolding and cutting are performed after curing is finished to obtain a blank body;
(6) And (5) carrying out autoclaved curing on the blank to obtain the environment-friendly autoclaved aerated concrete block.
Further, in the step (1), the lime and the gypsum are ground and then mixed, and the ground sieve is 80-120 meshes, preferably 100 meshes, which is beneficial to the stirring process.
Further, in the step (2) and the step (3), the mass ratio of the first part of water to the rest of water is 0.5-1.5, preferably 1, so that the components are uniformly dispersed, the foaming effect is good, and the preparation of the autoclaved aerated concrete block with good homogeneity is facilitated.
Further, in the step (5), the temperature of static maintenance in the hot chamber is 40-45 ℃, the humidity is 90-95%, and the time is 1.5-2.5 h; the temperature rising and pre-curing is carried out at 60-70 ℃, the humidity is 90-95%, the time is 2.5-3.5 h, in the step (6), the autoclaved curing time is 12-16 h, the temperature is 160-200 ℃, and the autoclaved pressure is 1-1.2 MPa.
The invention principle is as follows: the activity of the regenerated brick powder is excited by adopting physical grinding, the fly ash is partially substituted on the basis of combining the regenerated brick powder as a silicon-aluminum material, the volcanic ash activity of the regenerated brick powder is usually reflected after 28 days of hydration when the regenerated brick powder is used as an auxiliary cementing material, the volcanic ash reaction of the regenerated brick powder can be promoted under the autoclaved condition, the reaction is fully carried out within a few hours to generate gel, and the strength development of the aerated concrete block is facilitated. Due to the characteristics of loose and porous recycled brick powder, good water absorption and the like, the doping of the recycled brick powder is beneficial to improving the sound insulation and heat preservation and heat insulation performances of the aerated concrete block and enhancing the anti-shrinkage performance of the aerated concrete block.
Has the advantages that: compared with the prior art, the invention has the following remarkable advantages:
(1) The fly ash and the recycled brick powder are used as the raw materials of the concrete building block, so that the raw materials are rich, the energy is saved, the waste is utilized, the environment is protected, the cost can be reduced by 30-50%, and the fly ash and the recycled brick powder both have the volcanic ash activity and are beneficial to improving the strength of the product;
(2) The autoclaved aerated concrete block prepared by the invention has the advantages of high strength, good heat preservation and heat insulation performance, good sound insulation performance and low cost;
(3) The invention has reasonable formula design and simple manufacturing method, and the manufactured building block meets the use standard and has the advantages of easy production, low cost, high product performance and the like.
(4) The invention can efficiently utilize the waste building waste clay bricks as resources, achieves the purposes of protecting the environment and saving resources, can create good social and economic benefits, applies a large amount of regenerated brick powder to the autoclaved aerated concrete blocks, and realizes changing waste into valuable.
Detailed Description
The present invention will be further described with reference to specific examples.
Example 1: the environment-friendly autoclaved aerated concrete block comprises the following raw materials in parts by mass: 160 parts of fly ash, 60 parts of regenerated brick powder, 60 parts of cement, 60 parts of lime, 40 parts of gypsum, 0.6 part of aluminum powder, 0.2 part of fatty alcohol-polyoxyethylene ether sodium sulfate serving as a foam stabilizer and 200 parts of water, wherein the fly ash is F-class I-grade fly ash.
The preparation method of the environment-friendly autoclaved aerated concrete block comprises the following steps:
(1) Grinding 60 parts of lime and 40 parts of gypsum, sieving the ground lime and gypsum by a 100-mesh sieve, and mixing the ground lime and gypsum with 160 parts of fly ash, 60 parts of regenerated brick powder and 60 parts of cement to obtain a raw material mixture;
(2) Mixing and stirring 0.6 part of aluminum powder, 0.2 part of sodium alcohol ether sulphate serving as a foam stabilizer and the first part of water uniformly to obtain an aluminum powder solution;
(3) Mixing the raw material mixture with the rest part of water to obtain mixed slurry A;
(4) Stirring and mixing the aluminum powder solution and the mixed slurry A together to obtain mixed slurry B;
(5) Pouring and molding the mixed slurry B, standing and maintaining the mixed slurry B in a curing room at 45 ℃ for 2 hours, heating to 70 ℃ for precuring for 3 hours, and demolding and cutting after the curing is finished to obtain a blank;
(6) And (3) carrying out autoclaved curing on the blank at the autoclave temperature of 200 ℃ and the autoclave pressure of 1MPa for 12h to obtain the environment-friendly autoclaved aerated concrete block.
The finished product of the building block is subjected to related performance detection according to GB/T11968-2020 autoclaved aerated concrete block and GB/T11969-2020 autoclaved aerated concrete performance test method, and the results are shown in the following table 1.
Table 1 table for testing performance of environment-friendly autoclaved aerated concrete block prepared in example 1
Example 2: the environment-friendly autoclaved aerated concrete block comprises the following raw materials in parts by mass: 140 parts of fly ash, 70 parts of regenerated brick powder, 40 parts of cement, 70 parts of lime, 30 parts of gypsum, 0.4 part of aluminum powder, 0.1 part of fatty alcohol-polyoxyethylene ether sodium sulfate serving as a foam stabilizer and 250 parts of water, wherein the fly ash is F-class II-grade fly ash.
The preparation method of the environment-friendly autoclaved aerated concrete block comprises the following steps:
(1) Grinding 70 parts of lime and 30 parts of gypsum, sieving the ground lime and gypsum by a 100-mesh sieve, and mixing the ground lime and gypsum with 140 parts of fly ash, 70 parts of regenerated brick powder and 40 parts of cement to obtain a raw material mixture;
(2) Mixing 0.4 part of aluminum powder, 0.1 part of sodium alcohol ether sulphate as a foam stabilizer and the first part of water, and stirring uniformly to obtain an aluminum powder solution;
(3) Mixing the raw material mixture with the rest water to obtain mixed slurry A;
(4) Stirring and mixing the aluminum powder solution and the mixed slurry A together to obtain mixed slurry B;
(5) Pouring and molding the mixed slurry B, standing and maintaining the mixed slurry B in a curing room at 40 ℃ for 2 hours, heating to 60 ℃ for precuring for 3 hours, and demolding and cutting after the curing is finished to obtain a blank;
(6) And (3) carrying out autoclaved curing on the blank at the autoclave temperature of 180 ℃ and the autoclave pressure of 1MPa for 14h to obtain the environment-friendly autoclaved aerated concrete block.
The finished product of the building block is subjected to related performance detection according to GB/T11968-2020 autoclaved aerated concrete block and GB/T11969-2020 autoclaved aerated concrete performance test method, and the results are shown in the following table 2.
Table 2 table for testing performance of environment-friendly autoclaved aerated concrete block prepared in embodiment 2
Example 3: the environment-friendly autoclaved aerated concrete block comprises the following raw materials in parts by mass: 180 parts of fly ash, 50 parts of regenerated brick powder, 50 parts of cement, 70 parts of lime, 30 parts of gypsum, 0.6 part of aluminum powder, 0.2 part of fatty alcohol-polyoxyethylene ether sodium sulfate serving as a foam stabilizer and 220 parts of water, wherein the fly ash is F-class I-grade fly ash.
The preparation method of the environment-friendly autoclaved aerated concrete block comprises the following steps:
(1) Grinding 70 parts of lime and 30 parts of gypsum, sieving the ground lime and gypsum by using a 100-mesh sieve, and mixing the ground lime and gypsum with 180 parts of fly ash, 50 parts of regenerated brick powder and 50 parts of cement to obtain a raw material mixture;
(2) Mixing and stirring 0.6 part of aluminum powder, 0.2 part of sodium alcohol ether sulphate as a foam stabilizer and the first part of water uniformly to obtain an aluminum powder solution;
(3) Mixing the raw material mixture with the rest part of water to obtain mixed slurry A;
(4) Stirring and mixing the aluminum powder solution and the mixed slurry A together to obtain mixed slurry B;
(5) Carrying out standing maintenance on the mixed slurry B in a maintenance room at 40 ℃ for 2h after casting molding, then heating to 70 ℃ for precuring for 3h, and demoulding and cutting after maintenance to obtain a blank;
(6) And (3) carrying out autoclaved curing on the blank at the autoclave temperature of 200 ℃ and the autoclave pressure of 1.2MPa for 14h to obtain the environment-friendly autoclaved aerated concrete block.
And (3) carrying out related performance detection on the finished product of the building block according to GB/T11968-2020 autoclaved aerated concrete block and GB/T11969-2020 autoclaved aerated concrete performance test method, wherein the results are shown in the following table 3.
Table 3 performance test table for environment-friendly autoclaved aerated concrete block prepared in example 3
Comparative example 1: the difference from the example 1 is that 60 parts of fly ash and 160 parts of recycled brick powder.
Comparative example 2: a3.5-grade autoclaved aerated concrete block sold by Haoyi building materials Co.
The concrete prepared in comparative example 1 and comparative example 2 were subjected to the relevant performance tests, and the results are shown in table 4.
Table 4 table for testing the properties of concrete blocks obtained in example 1 and comparative examples 1 to 2
The aerated concrete block of comparative example 1 had a much lower strength than example 1, because the regenerated brick powder had a lower amorphous content and had a lower activity than fly ash. Under the same conditions, less pozzolan reaction products in autoclaved aerated concrete blocks resulted in much lower strength than in example 1.
The heat conductivity coefficient of the aerated concrete block in the comparative example 2 is increased compared with that of the aerated concrete block in the example 1, because the dry density of the autoclaved aerated concrete in the comparative example 2 is high, and the regenerated brick powder doped in the example 1 has the characteristics of porosity, looseness and good water absorption performance, and the characteristics are favorable for enhancing the heat preservation and heat insulation performance of the autoclaved aerated concrete block.
Claims (10)
1. The environment-friendly autoclaved aerated concrete block is characterized by comprising the following raw materials in parts by mass: 100 to 180 portions of fly ash, 50 to 80 portions of recycled brick powder, 40 to 60 portions of cement, 40 to 70 portions of lime, 20 to 40 portions of gypsum, 0.2 to 0.7 portion of aluminum powder, 0.05 to 0.2 portion of foam stabilizer and 200 to 300 portions of water.
2. The environment-friendly autoclaved aerated concrete block as claimed in claim 1, wherein the recycled brick powder is prepared by crushing and ball milling waste clay bricks, the particle size is less than 100 meshes, and the water content is less than or equal to 0.1%.
3. The environment-friendly autoclaved aerated concrete block as set forth in claim 1, wherein said fly ash is class F class I fly ash or class F class II fly ash.
4. The environment-friendly autoclaved aerated concrete block as recited in claim 1, wherein said cement is portland cement.
5. The environment-friendly autoclaved aerated concrete block as claimed in claim 1, wherein the foam stabilizer is sodium fatty alcohol-polyoxyethylene ether sulfate.
6. The preparation method of the environment-friendly autoclaved aerated concrete block as claimed in claim 1, which is characterized by comprising the following steps:
(1) Mixing fly ash, recycled brick powder, cement, lime and gypsum together to obtain a raw material mixture;
(2) Mixing and stirring aluminum powder, a foam stabilizer and the first part of water uniformly to obtain an aluminum powder solution;
(3) Mixing the raw material mixture with the rest part of water to obtain mixed slurry A;
(4) Stirring and mixing the aluminum powder solution and the mixed slurry A together to obtain mixed slurry B;
(5) Pouring and molding the mixed slurry B, then performing static stop and heating pre-curing in a curing chamber, and demolding and cutting after curing to obtain a blank body;
(6) And (5) carrying out autoclaved curing on the blank to obtain the environment-friendly autoclaved aerated concrete block.
7. The method according to claim 6, wherein in the step (1), the lime and the gypsum are ground and then mixed, and the ground mesh is 80-120 mesh.
8. The method according to claim 6, wherein in the step (2) and the step (3), the mass ratio of the first part of water to the rest of water is 0.5-1.5.
9. The preparation method according to claim 6, wherein in the step (5), the temperature of the static curing in the hot chamber is 40-45 ℃, the humidity is 90-95%, and the time is 1.5-2.5 h; the temperature for heating and pre-curing is 60-70 ℃, the humidity is 90-95%, and the time is 2.5-3.5 h.
10. The preparation method according to claim 6, wherein in the step (6), the autoclave curing time is 12 to 16 hours, the temperature is 160 to 200 ℃, and the autoclave pressure is 1 to 1.2MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211251281.9A CN115477528A (en) | 2022-10-13 | 2022-10-13 | Environment-friendly autoclaved aerated concrete block and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211251281.9A CN115477528A (en) | 2022-10-13 | 2022-10-13 | Environment-friendly autoclaved aerated concrete block and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115477528A true CN115477528A (en) | 2022-12-16 |
Family
ID=84396370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211251281.9A Pending CN115477528A (en) | 2022-10-13 | 2022-10-13 | Environment-friendly autoclaved aerated concrete block and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115477528A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116023085A (en) * | 2022-12-29 | 2023-04-28 | 上海浦东路桥(集团)有限公司 | Aerated concrete prepared based on decoration garbage reclaimed materials and preparation method thereof |
| CN116426154A (en) * | 2023-04-12 | 2023-07-14 | 东南大学 | Environment-friendly exterior wall putty powder and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009083413A (en) * | 2007-10-02 | 2009-04-23 | Clion Co Ltd | Manufacturing method of cellular concrete |
| CN103664114A (en) * | 2013-11-14 | 2014-03-26 | 河南兴安新型建筑材料有限公司 | Self-heat-insulating fly ash autoclaved aerated concrete block and preparation method thereof |
| CN104230373A (en) * | 2014-09-30 | 2014-12-24 | 淄博铭城建材有限公司 | Autoclaved aerated concrete block and manufacturing method thereof |
| CN107382245A (en) * | 2017-07-28 | 2017-11-24 | 长沙理工大学 | A kind of fine coal sand-lime autoclave aerated concrete building block and preparation method thereof |
| CN113880516A (en) * | 2021-10-11 | 2022-01-04 | 辽宁工业大学 | Non-autoclaved fly ash aerated concrete thermal insulation building block and preparation method thereof |
-
2022
- 2022-10-13 CN CN202211251281.9A patent/CN115477528A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009083413A (en) * | 2007-10-02 | 2009-04-23 | Clion Co Ltd | Manufacturing method of cellular concrete |
| CN103664114A (en) * | 2013-11-14 | 2014-03-26 | 河南兴安新型建筑材料有限公司 | Self-heat-insulating fly ash autoclaved aerated concrete block and preparation method thereof |
| CN104230373A (en) * | 2014-09-30 | 2014-12-24 | 淄博铭城建材有限公司 | Autoclaved aerated concrete block and manufacturing method thereof |
| CN107382245A (en) * | 2017-07-28 | 2017-11-24 | 长沙理工大学 | A kind of fine coal sand-lime autoclave aerated concrete building block and preparation method thereof |
| CN113880516A (en) * | 2021-10-11 | 2022-01-04 | 辽宁工业大学 | Non-autoclaved fly ash aerated concrete thermal insulation building block and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 余昭阳: "碱激发再生黏土砖粉泡沫混凝土性能研究" * |
| 魏小军;李从波;方飞;曾奕强;邓大进;: "陶瓷抛光废料用于制备蒸压加气混凝土砌块的研究" * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116023085A (en) * | 2022-12-29 | 2023-04-28 | 上海浦东路桥(集团)有限公司 | Aerated concrete prepared based on decoration garbage reclaimed materials and preparation method thereof |
| CN116426154A (en) * | 2023-04-12 | 2023-07-14 | 东南大学 | Environment-friendly exterior wall putty powder and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110317017B (en) | Lightweight high-strength foam concrete and preparation method thereof | |
| CN115477528A (en) | Environment-friendly autoclaved aerated concrete block and preparation method thereof | |
| CN102875066B (en) | Chromic slag aerated brick and preparation method thereof | |
| CN102219415B (en) | Light sand without burning and preparation method thereof | |
| CN102875071B (en) | Boron slag aerated brick and preparation method thereof | |
| CN102875184B (en) | Oil shale residue aerated brick and preparation method thereof | |
| CN110452015A (en) | A kind of high strength foam concrete and preparation method thereof | |
| CN111807807A (en) | Non-autoclaved lightweight heat-insulating particle aerated concrete block and preparation method thereof | |
| CN105254324A (en) | Air-entrapping steam curing component prepared from construction waste and preparation method thereof | |
| CN101581131A (en) | Non-autoclaved aerated concrete building block and manufacturing method | |
| CN102875188B (en) | Magnesite slag aerating brick and preparation method thereof | |
| CN110540387A (en) | Lightweight energy-saving concrete and preparation method thereof | |
| CN110642559B (en) | Coal ash geopolymer foam concrete and preparation method thereof | |
| CN114044665B (en) | Assembled aerated concrete plate prepared from garbage bottom slag and preparation method thereof | |
| CN112408829B (en) | Solid waste reclaimed sand and preparation method and application thereof | |
| CN102875186B (en) | Fluorite slag aerated brick and preparation method thereof | |
| CN110511056A (en) | A kind of foam concrete block and preparation method thereof | |
| CN113831152B (en) | All-solid-waste high-strength permeable geopolymer concrete and preparation method thereof | |
| CN108585925A (en) | A kind of self heat-preserving concrete building block | |
| CN107141013A (en) | A kind of Modified Quartz Sand thermal insulation mortar and its production method | |
| CN110194641B (en) | Interface-enhanced phosphogypsum light inner wall partition board and preparation method thereof | |
| CN104086146A (en) | Resource utilization method of mine tailings | |
| CN114085053A (en) | Waste building residue soil slurry base baking-free early-strength lightweight aggregate and preparation method thereof | |
| CN105016648A (en) | Concrete additive and light composite block applying same | |
| CN102875068A (en) | Building rubbish aerated concrete block and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20221216 |