CN110950609A - Ultra-light heat-preservation aerated concrete for prefabricated parts and preparation method thereof - Google Patents
Ultra-light heat-preservation aerated concrete for prefabricated parts and preparation method thereof Download PDFInfo
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/50—Producing shaped prefabricated articles from the material specially adapted for producing articles of expanded material, e.g. cellular concrete
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
- B28B11/245—Curing concrete articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/38—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions wherein the mixing is effected both by the action of a fluid and by directly-acting driven mechanical means, e.g. stirring means ; Producing cellular concrete
- B28C5/381—Producing cellular concrete
- B28C5/386—Plants; Systems; Methods
- B28C5/388—Methods
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/40—Mixing specially adapted for preparing mixtures containing fibres
- B28C5/402—Methods
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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
- C04B38/0051—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof characterised by the pore size, pore shape or kind of porosity
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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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5024—Silicates
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- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/60—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only artificial stone
- C04B41/61—Coating or impregnation
- C04B41/65—Coating or impregnation with inorganic materials
- C04B41/68—Silicic acid; Silicates
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/40—Porous or lightweight materials
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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 relates to an ultralight heat-preservation aerated concrete for an assembled prefabricated part, which comprises the following components in parts by weight: 90-150 parts of cement, 40-60 parts of fly ash, 0.4-0.65 part of polypropylene fiber, 1.3-2.0 parts of thickening agent, 2.6-4.1 parts of foam stabilizing accelerator, 8.0-14.0 parts of air entraining agent, 5.0 parts of catalyst, 70-120 parts of water and 2.5-4.5 parts of water glass spray. Compared with the prior art, the lightweight high-strength aerated concrete product prepared by the invention has the advantages of uniform distribution, good thermal insulation performance, ultralight weight and higher strength, solves the problems of low strength and high volume weight of aerated concrete, not only improves the strength, but also keeps smaller density, can meet the high requirement of the current building field on the bearing performance of the aerated concrete, simultaneously conforms to the requirement of green environment-friendly buildings, and can be widely popularized and used.
Description
Technical Field
The invention relates to aerated concrete, in particular to ultralight heat-preservation aerated concrete for an assembled prefabricated part and a preparation method thereof.
Background
The aerated concrete is a novel environment-friendly building material with low energy consumption, and has the advantages of light weight, good heat preservation and insulation performance, high strength, good earthquake resistance and good processabilityHigh temperature resistance, good sound insulation performance and the like, and the dry density of the product is 5OOkg/m under the high-pressure curing condition3The aerated concrete with the compression resistance value of more than 0.7Mpa adopts high-grade cement or special cement as a raw material, adopts aluminum powder with fine particles as an air entraining agent, causes higher cost of the prepared aerated concrete, has low later strength and danger of secondary foaming, mainly focuses on the aspects of foam stabilizer, water repellent, water reducer and the like in the aspect of research on the aerated concrete additive, and develops the dry bulk density of not more than 250kg/m by adopting hydrogen peroxide as an air forming agent and silicate cement as a main gelling agent3The ultralight heat-insulating aerated concrete with the heat conductivity coefficient smaller than O.065W/(m.K) and the strength suitable for the use requirement is a novel wall material, and has wide market development prospect.
How to invent a light high-strength aerated concrete product with good thermal insulation performance, ultralight weight and higher strength solves the problems of low strength and large volume weight of aerated concrete, not only improves the strength, but also keeps smaller density, can meet the high requirement of the current building field on the bearing property of the aerated concrete, simultaneously meets the requirement of green environment-friendly buildings, and is the key to the problem to be solved.
Disclosure of Invention
In order to solve the technical problems that the existing aerated concrete is low in strength and large in volume weight and cannot meet the high requirement of the current building field on the aerated concrete bearing capacity, the invention provides the ultralight heat-insulating aerated concrete for the prefabricated part and the preparation method thereof, so that a light high-strength aerated concrete product which is good in heat-insulating property, ultralight and high in strength is realized, the problems of low strength and large volume weight of the aerated concrete are solved, the strength is improved, the smaller density is kept, the high requirement of the current building field on the aerated concrete bearing capacity can be met, the requirements of the current building field on green environment-friendly buildings are met, and the aerated concrete can be widely popularized and used.
The technical scheme of the invention is as follows: the ultra-light heat-preservation aerated concrete for the prefabricated parts comprises the following components in parts by weight: 90-150 parts of cement, 40-60 parts of fly ash, 0.4-0.65 part of polypropylene fiber, 1.3-2.0 parts of thickening agent, 2.6-4.1 parts of foam stabilizing accelerator, 8.0-14.0 parts of air entraining agent, 5.0 parts of catalyst, 70-120 parts of water and 2.5-4.5 parts of water glass spray.
The thickening agent is a water-soluble high-molecular biopolymer taking xanthan gum as a main component, and is mainly prepared from xanthan gum, cellulose ether and fly ash according to the ratio of 3-4: 1-1.2: 7-9.
The foam stabilizing accelerator comprises stearic acid, potassium hydroxide, sodium carbonate, lithium carbonate, ammonia water, sodium fluoride and water according to the weight ratio of 6-10: 1-1.5: 0.3-0.9: 1.5-2.5: 4-5: 0.01-0.1: 130-160.
The air-entraining agent is hydrogen peroxide, and the concentration of the hydrogen peroxide solution is 30.0%.
The catalyst is FeCl3And (3) powder.
A preparation method of ultralight heat-preservation aerated concrete for prefabricated components comprises the following steps:
(1) pouring a certain amount of tap water heated to the specified temperature of 45 ℃ into a stirring barrel, starting a handheld high-speed stirrer, sequentially adding cement, fly ash, polypropylene fiber, a foam stabilizing accelerator and a tackifier into the stirring barrel, stirring for 180-300 seconds, then pouring a catalyst and a hydrogen peroxide solution into the stirring barrel, and continuing stirring for 10-60 seconds;
(2) pouring the slurry into a mold, sticking extruded polystyrene boards with thickness of 20mm on the four sides and the bottom of the mold, standing for 10-20min until the slurry foaming process is completed, covering the surface of the slurry with a plastic film, and sealing with the extruded polystyrene boards with thickness of 20 mm;
(3) and curing the slurry at 20 ℃ for 6 days, then removing the mold, spraying with a water glass spray, covering the surface of the slurry with a plastic film, continuously curing at room temperature to 28 days of age, cutting the test piece into a required shape and size after the test piece reaches the age, drying at 60 ℃ to constant weight, and then taking out to obtain the ultralight heat-insulating aerated concrete test block.
The invention has the following beneficial effects: compared with the prior art, the method has the advantages that,
1. compared with other aerated concrete, the ultra-light heat-preservation aerated concrete does not use an aluminum powder foaming agent, but uses a catalyst and a hydrogen peroxide solution, and the input time of the hydrogen peroxide solution is mainly controlled by controlling the hydrogen peroxide solution and alkaline slurry (Ca (OH)2) And catalyst (FeCl)3) The contact has a catalytic effect on the decomposition of hydrogen peroxide, and the hydrogen peroxide mainly has the functions of decomposing to generate oxygen in the stirring process of the aerated concrete slurry, and oxygen molecules are aggregated and grown to form a plurality of uniform and fine bubbles, so that the aerated concrete has a large number of uniform and fine pore structures, thereby having the purpose of light weight and heat insulation, reducing the production cost, improving the cost performance of products, simultaneously improving the product quality and ensuring the strength of aerated blocks;
2. the ultra-light aerated concrete with the apparent density of 150-250 kg/m3 can be prepared by adopting portland cement, fly ash, hydrogen peroxide, a catalyst, a foam stabilizing quick-setting emulsion and a thickening agent;
3. most of air holes in the ultralight heat-insulating aerated concrete prepared by the invention are non-intercommunicated holes with the aperture of 2.0-4. Omm, have low heat conductivity coefficient and can meet the requirements of compression strength and tensile strength in common engineering;
4. the mechanical property of the ultralight heat-insulating aerated concrete can be improved by spraying water glass on the surface, and the service life is prolonged.
Detailed Description
The present invention will be described in further detail with reference to specific examples.
Example 1
The ultra-light heat-preservation aerated concrete for the prefabricated parts comprises the following components in parts by weight: 90 parts of cement, 40 parts of fly ash, 0.4 part of polypropylene fiber, 1.3 parts of thickening agent, 2.6 parts of foam stabilizing accelerator, 8.0 parts of air entraining agent, 5.0 parts of catalyst, 70 parts of water and 2.5 parts of water glass spray.
The thickening agent is a water-soluble high-molecular biopolymer taking xanthan gum as a main component, and is mainly prepared from xanthan gum, cellulose ether and fly ash according to the proportion of 3:1: 7.
The foam stabilizing accelerator comprises stearic acid, potassium hydroxide, sodium carbonate, lithium carbonate, ammonia water, sodium fluoride and water according to the weight ratio of 6: 1: 0.3: 1.5: 4: 0.01: 130, and the components are mixed according to the proportion of 130.
The air-entraining agent is hydrogen peroxide, and the concentration of the hydrogen peroxide solution is 30.0%.
The catalyst is FeCl3And (3) powder.
A preparation method of ultralight heat-preservation aerated concrete for prefabricated components comprises the following steps:
(1) pouring a certain amount of tap water heated to the specified temperature of 45 ℃ into a stirring barrel, starting a handheld high-speed stirrer, sequentially adding cement, fly ash, polypropylene fiber, a foam stabilizing accelerator and a tackifier into the stirring barrel, stirring for 180 seconds, pouring a catalyst and a hydrogen peroxide solution into the stirring barrel, and continuously stirring for 10 seconds;
(2) rapidly pouring the slurry into a mold, sticking extruded polystyrene boards with the thickness of 20mm on the four sides and the bottom of the mold, standing for 10min until the slurry foaming process is finished, covering the surface of the slurry with a plastic film, and sealing with the extruded polystyrene boards with the thickness of 20 mm;
(3) and curing the slurry at 20 ℃ for 6 days, then removing the mold, spraying with a water glass spray, covering the surface of the slurry with a plastic film, continuously curing at room temperature to 28 days of age, cutting the test piece into a required shape and size after the test piece reaches the age, drying at 60 ℃ to constant weight, and then taking out to obtain the ultralight heat-insulating aerated concrete test block.
Example 2
The ultra-light heat-preservation aerated concrete for the prefabricated parts comprises the following components in parts by weight: 120 parts of cement, 50 parts of fly ash, 0.5 part of polypropylene fiber, 1.6 parts of thickening agent, 3 parts of foam stabilizing accelerator, 11 parts of air entraining agent, 5.0 parts of catalyst, 95 parts of water and 3.5 parts of water glass spray.
The thickening agent is a water-soluble high-molecular biopolymer taking xanthan gum as a main component, and is mainly prepared from xanthan gum, cellulose ether and fly ash according to the proportion of 3.5:1: 8.
The foam stabilizing accelerator comprises stearic acid, potassium hydroxide, sodium carbonate, lithium carbonate, ammonia water, sodium fluoride and water according to the ratio of 8: 1.2: 0.6: 2: 4.5: 0.05: 150, and the components are mixed according to the proportion of 150.
The air-entraining agent is hydrogen peroxide, and the concentration of the hydrogen peroxide solution is 30.0%.
The catalyst is FeCl3And (3) powder.
A preparation method of ultralight heat-preservation aerated concrete for prefabricated components comprises the following steps:
(1) pouring a certain amount of tap water heated to the specified temperature of 45 ℃ into a stirring barrel, starting a handheld high-speed stirrer, sequentially adding cement, fly ash, polypropylene fiber, a foam stabilizing accelerator and a tackifier into the stirring barrel, stirring for 240 seconds, pouring a catalyst and a hydrogen peroxide solution into the stirring barrel, and continuously stirring for 30 seconds;
(2) rapidly pouring the slurry into a mold, sticking extruded polystyrene boards with the thickness of 20mm on the four sides and the bottom of the mold, standing for 15min until the slurry foaming process is finished, covering the surface of the slurry with a plastic film, and sealing with the extruded polystyrene boards with the thickness of 20 mm;
(3) and curing the slurry at 20 ℃ for 6 days, then removing the mold, spraying with a water glass spray, covering the surface of the slurry with a plastic film, continuously curing at room temperature to 28 days of age, cutting the test piece into a required shape and size after the test piece reaches the age, drying at 60 ℃ to constant weight, and then taking out to obtain the ultralight heat-insulating aerated concrete test block.
Example 3
The ultra-light heat-preservation aerated concrete for the prefabricated parts comprises the following components in parts by weight: 150 parts of cement, 0 part of fly ash, 0.65 part of polypropylene fiber, 2.0 parts of thickening agent, 4.1 parts of foam stabilizing accelerator, 14.0 parts of air entraining agent, 5.0 parts of catalyst, 120 parts of water and 4.5 parts of water glass spray.
The thickening agent is a water-soluble high-molecular biopolymer taking xanthan gum as a main component, and is mainly prepared from xanthan gum, cellulose ether and fly ash according to the proportion of 4: 1.2: 9.
The foam stabilizing accelerator comprises stearic acid, potassium hydroxide, sodium carbonate, lithium carbonate, ammonia water, sodium fluoride and water according to the weight ratio of 10: 1.5: 0.9: 2.5: 5: 0.1: 160 according to the proportion.
The air-entraining agent is hydrogen peroxide, and the concentration of the hydrogen peroxide solution is 30.0%.
The catalyst is FeCl3And (3) powder.
A preparation method of ultralight heat-preservation aerated concrete for prefabricated components comprises the following steps:
(1) pouring a certain amount of tap water heated to the specified temperature of 45 ℃ into a stirring barrel, starting a handheld high-speed stirrer, sequentially adding cement, fly ash, polypropylene fiber, a foam stabilizing accelerator and a tackifier into the stirring barrel, stirring for 180-300 seconds, then pouring a catalyst and a hydrogen peroxide solution into the stirring barrel, and continuing stirring for 10-60 seconds;
(2) pouring the slurry into a mold, sticking extruded polystyrene boards with thickness of 20mm on the four sides and the bottom of the mold, standing for 10-20min until the slurry foaming process is completed, covering the surface of the slurry with a plastic film, and sealing with the extruded polystyrene boards with thickness of 20 mm;
(3) and curing the slurry at 20 ℃ for 6 days, then removing the mold, spraying with a water glass spray, covering the surface of the slurry with a plastic film, continuously curing at room temperature to 28 days of age, cutting the test piece into a required shape and size after the test piece reaches the age, drying at 60 ℃ to constant weight, and then taking out to obtain the ultralight heat-insulating aerated concrete test block.
Wherein the cement is P.042.5 ordinary portland cement; the length of the polypropylene fiber is 3-6 mm, the monofilament diameter is 12-161 mm, the tensile strength is not less than 4100N/mm 2, and the fly ash is secondary fly ash.
And (4) analyzing results: the performance of the ultralight heat-preservation aerated concrete test blocks obtained in examples 1 to 3 is detected, and the dry volume weight of the concrete test block prepared in example 1 is 230-250 kg/m3The heat conductivity coefficient is 0.053W/(m.k), and the compression resistance value is 0.58 Mpa; the dry volume weight of the concrete test block prepared in the example 2 is 190-220 kg/m3The heat conductivity coefficient is 0.058W/(m.k), and the compression resistance value is 0.55 Mpa; the dry volume weight of the concrete test block prepared in the example 3 is 150-170 kg/m3The heat conductivity coefficient is 0.057W/(m.k), and the compression resistance value is0.55Mpa。
From the above, the light heat preservation aerated concrete produced in the embodiments 1 to 3 realizes the refinement of the use and metering of various materials in the production of the light heat preservation aerated concrete through the selection and the proportioning parameters of various materials, so that the stability of the product performance is improved.
It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and the present invention is not limited thereto, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and equivalents can be made in the technical solutions described in the foregoing embodiments, or some technical features can be replaced. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The utility model provides an assembled is ultralight heat preservation aerated concrete for prefabricated component which characterized in that: the composition comprises the following components in parts by weight: 90-150 parts of cement, 40-60 parts of fly ash, 0.4-0.65 part of polypropylene fiber, 1.3-2.0 parts of thickening agent, 2.6-4.1 parts of foam stabilizing accelerator, 8.0-14.0 parts of air entraining agent, 5.0 parts of catalyst, 70-120 parts of water and 2.5-4.5 parts of water glass spray.
2. The ultra-light heat-insulating aerated concrete for the prefabricated parts according to claim 1, wherein the ultra-light heat-insulating aerated concrete comprises the following components in percentage by weight: the thickening agent is a water-soluble high-molecular biopolymer taking xanthan gum as a main component, and is mainly prepared from xanthan gum, cellulose ether and fly ash according to the ratio of 3-4: 1-1.2: 7-9.
3. The ultra-light heat-insulating aerated concrete for the prefabricated parts according to claim 1, wherein the ultra-light heat-insulating aerated concrete comprises the following components in percentage by weight: the foam stabilizing accelerator comprises stearic acid, potassium hydroxide, sodium carbonate, lithium carbonate, ammonia water, sodium fluoride and water according to the weight ratio of 6-10: 1-1.5: 0.3-0.9: 1.5-2.5: 4-5: 0.01-0.1: 130-160.
4. The ultra-light heat-insulating aerated concrete for the prefabricated parts according to claim 1, wherein the ultra-light heat-insulating aerated concrete comprises the following components in percentage by weight: the air-entraining agent is hydrogen peroxide, and the concentration of the hydrogen peroxide solution is 30.0%.
5. The ultra-light heat-insulating aerated concrete for the prefabricated parts according to claim 1, wherein the ultra-light heat-insulating aerated concrete comprises the following components in percentage by weight: the catalyst is FeCl3And (3) powder.
6. The ultra-light heat-insulating aerated concrete for prefabricated parts according to any one of claims 1 to 5, which is prepared by the following steps:
(1) pouring a certain amount of tap water heated to the specified temperature of 45 ℃ into a stirring barrel, starting a handheld high-speed stirrer, sequentially adding cement, fly ash, polypropylene fiber, a foam stabilizing accelerator and a tackifier into the stirring barrel, stirring for 180-300 seconds, then pouring a catalyst and a hydrogen peroxide solution into the stirring barrel, and continuing stirring for 10-60 seconds;
(2) pouring the slurry into a mold, sticking extruded polystyrene boards with thickness of 20mm on the four sides and the bottom of the mold, standing for 10-20min until the slurry foaming process is completed, covering the surface of the slurry with a plastic film, and sealing with the extruded polystyrene boards with thickness of 20 mm;
(3) and curing the slurry at 20 ℃ for 6 days, then removing the mold, spraying with a water glass spray, covering the surface of the slurry with a plastic film, continuously curing at room temperature to 28 days of age, cutting the test piece into a required shape and size after the test piece reaches the age, drying at 60 ℃ to constant weight, and then taking out to obtain the ultralight heat-insulating aerated concrete test block.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115784688A (en) * | 2022-12-08 | 2023-03-14 | 宝武环科山西资源循环利用有限公司 | Preparation method of ultralight aerated concrete block |
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