CN111574119A - Foam concrete with high light weight and performance and preparation method thereof - Google Patents
Foam concrete with high light weight and performance and preparation method thereof Download PDFInfo
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- CN111574119A CN111574119A CN202010416375.1A CN202010416375A CN111574119A CN 111574119 A CN111574119 A CN 111574119A CN 202010416375 A CN202010416375 A CN 202010416375A CN 111574119 A CN111574119 A CN 111574119A
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- foam concrete
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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
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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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
A foam concrete with strong light weight and performance and a preparation method thereof are disclosed, which are composed of the following raw materials by weight percentage: 40-60% of cement, 10-20% of fly ash, 5-10% of filler, 1-2% of water reducing agent, 0.5-1% of dispersed latex powder, 0.1-0.5% of plasticizer, 2-5% of foaming agent, 0.1-0.5% of foam stabilizer, 5-10% of clay, 0.5-1% of hydroxypropyl methyl cellulose ether and 0.5-1% of polypropylene fiber; the preparation method fully utilizes wastes such as cement, fly ash and filler, reduces the using amount of cement, improves the performance of foam concrete, saves the construction production cost, and solves the problems of high cement proportion in the foam concrete, poor stability during pouring (pouring), poor strength and large weight caused by over-low cement using amount.
Description
Technical Field
The invention belongs to the technical field of building material production, and particularly relates to foam concrete with high light weight and high performance and a preparation method thereof.
Background
The foamed concrete is a novel light heat-insulating material containing a large number of closed air holes, which is formed by adding a chemical foaming agent or a physical foaming agent into a cementing material, an admixture, a modifier, brine and the like after foaming to prepare slurry, mixing and stirring, casting and molding, and naturally curing.
The main raw material of the foam concrete is cement, because the foam concrete is mostly maintained at normal temperature and is doped with a large amount of foam, the cement proportion is high, and when the foam concrete is produced at normal temperature, the active micro-aggregate can not generate hydration reaction quickly, and the fixed foam still depends on the gelation of the cement, so the proportion of the foam concrete must take the cement as a main body, the high cement proportion is adopted, and the cement consumption accounts for 70-100% of the total amount of dry materials under general conditions. The low cement proportion is difficult to ensure the strength and the crack resistance of the product, the cement proportion is reduced on the basis of meeting the product performance, the stability during pouring (pouring) needs to be considered, the mold collapse can be caused by the excessively low cement consumption, and the difficulty of the development of the foam concrete is caused by the incapability of ensuring the strength performance.
Disclosure of Invention
In order to solve the problems that the proportion of cement in foam concrete is high, the stability during pouring (pouring) is poor, the mold collapse is caused by too low cement consumption and the strength performance is not influenced by reducing the cement consumption, the invention provides the foam concrete with light weight and strong performance and a preparation method thereof.
The technical scheme for solving the technical problems is as follows: a foam concrete with strong light weight and performance is composed of the following raw materials in percentage by weight: 40-60% of cement, 10-20% of fly ash, 5-10% of filler, 1-2% of water reducing agent, 0.5-1% of dispersed latex powder, 0.1-0.5% of plasticizer, 2-5% of foaming agent, 0.1-0.5% of foam stabilizer, 5-10% of clay, 0.5-1% of hydroxypropyl methyl cellulose ether and 0.5-1% of polypropylene fiber.
The preparation method of the foam concrete with strong light weight performance comprises the following steps:
step S1: uniformly mixing 40-60% of cement, 10-20% of fly ash, 5-10% of filler and 1-2% of water reducing agent, adding water and stirring to obtain cement mortar.
Step S2: adding 0.5-1% of dispersed latex powder, 0.5-1% of hydroxypropyl methyl cellulose ether and 0.5-1% of polypropylene fiber into the cement mortar, and uniformly stirring to obtain slurry A.
Step S3: and adding 5-10% of clay and 0.5-1% of dispersed emulsion powder into the slurry A, and stirring and uniformly mixing to obtain slurry B.
Step S4: foaming 2-5% of foaming agent, adding 0.1-0.5% of foam stabilizer and 0.1-0.5% of plasticizer, uniformly stirring, adding the generated foam into the slurry B, and uniformly stirring to obtain the foam concrete with strong light weight and performance.
The foam stabilizer is prepared from aluminum stearate and xanthan gum according to the mass ratio of 1: 5.
The foaming agent is one or two of alkyl sulfonate, hydroxyalkyl ether sulfonate and alkyl ether sulfonate.
The plasticizer is citrate esters.
The water reducing agent is polycarboxylic acid.
The filler is one or more of fine river sand, fine stone powder or fine mineral powder.
When the light foam concrete in the step S4 is poured into the mold, the height ratio of the material pouring height of the light foam concrete to the mold height is 1-3: 2-4.
The water reducing agent reduces the water-cement ratio of the foam concrete, and enhances the gelation after the dispersed latex powder is mixed, thereby enhancing the strength of the foam concrete, and fully promoting the hydration reaction of cement, thereby enhancing the strength of the foam concrete and reducing the dosage of the cement.
The foaming agent, the foam stabilizer and the plasticizer are mixed and stirred and then added into the slurry to form countless air holes, the foaming aperture is uniform and fine, the foam stability is high, the foaming, dispersing and water-retaining properties are good, the strength of foam concrete can be enhanced, the water-mixing dosage is saved, and the problem that the mold collapse is caused by too low cement dosage can be avoided.
Compared with the prior art, the invention has the beneficial effects that: when the lightweight high-performance foam concrete is prepared, applied, special stirring equipment and maintenance equipment are not needed, the production is convenient, the preparation cost is low, the compressive strength of the foam concrete is improved compared with that of the foam concrete prepared by the prior art under the same dry density with other concrete, the rheological property and viscosity of foam concrete slurry can be obviously improved by adding clay, dispersed latex powder and a water reducing agent, the foam stability is improved, the strength of the foam concrete is also improved, the folding strength and the crack resistance of the foam concrete are improved by adding polypropylene fiber, the defects of easy sinking of mortar particles, uneven foaming aperture, poor stability, easy die collapse in the initial setting stage, easy breaking after final setting, no toughness and easy cracking and the like are avoided by adding a foaming agent and a foam stabilizer in a mixing reaction, and the preparation method fully utilizes wastes such as cement, coal ash and filler, the consumption of cement is reduced, the performance of the foam concrete is improved, the production cost of the building is saved, the problems that the cement proportion in the foam concrete is high, the stability during pouring (pouring) is poor, and the too low cement consumption can cause die collapse and poor strength are solved, the weight of the foam concrete is reduced due to the small cement proportion, the foam concrete is lighter, and the foam concrete has good use prospect and economic value.
Detailed Description
Example 1.
A foam concrete with strong light weight and performance is composed of the following raw materials in percentage by weight: 40-60% of cement, 10-20% of fly ash, 5-10% of filler, 1-2% of water reducing agent, 0.5-1% of dispersed latex powder, 0.1-0.5% of plasticizer, 2-5% of foaming agent, 0.1-0.5% of foam stabilizer, 5-10% of clay, 0.5-1% of hydroxypropyl methyl cellulose ether and 0.5-1% of polypropylene fiber.
A preparation method of foam concrete with strong light weight and performance comprises the following steps: step S1: uniformly mixing 40-60% of cement, 10-20% of fly ash, 5-10% of filler and 1-2% of water reducing agent, adding water and stirring to obtain cement mortar; step S2: adding 0.5-1% of dispersed latex powder, 0.5-1% of hydroxypropyl methyl cellulose ether and 0.5-1% of polypropylene fiber into the cement mortar, and uniformly stirring to obtain slurry A; step S3: adding 5-10% of clay and 0.5-1% of dispersed latex powder into the slurry A, and uniformly stirring to obtain slurry B; step S4: foaming 2-5% of foaming agent, adding 0.1-0.5% of foam stabilizer and 0.1-0.5% of plasticizer, uniformly stirring, adding the generated foam into the slurry B, and uniformly stirring to obtain the light foam concrete.
The foam stabilizer is prepared from aluminum stearate and xanthan gum according to the mass ratio of 1: 5;
the foaming agent is one or two of alkyl sulfonate, hydroxyalkyl ether sulfonate and alkyl ether sulfonate;
the plasticizer is citric acid ester;
the water reducing agent is polycarboxylic acid;
the filler is one or more of fine river sand, fine stone powder or fine mineral powder.
When the light foam concrete in the step S4 is poured into the mold, the height ratio of the material pouring height of the light foam concrete to the mold height is 1-3: 2-4.
Example 2.
A foam concrete with strong light weight and performance is composed of the following raw materials in percentage by weight: 45-55% of cement, 12-18% of fly ash, 6-9% of filler, 1.2-1.8% of water reducing agent, 0.6-0.9% of dispersed latex powder, 0.2-0.4% of plasticizer, 3.5-4.5% of foaming agent, 0.2-0.4% of foam stabilizer, 6-9% of clay, 0.6-0.9% of hydroxypropyl methyl cellulose ether and 0.6-0.9% of polypropylene fiber.
A preparation method of foam concrete with strong light weight and performance comprises the following steps: step S1: uniformly mixing 45-55% of cement, 12-18% of fly ash, 6-9% of filler and 1.2-1.8% of water reducing agent, adding water and stirring to obtain cement mortar; step S2: adding 0.6-0.9% of dispersed latex powder, 0.6-0.9% of hydroxypropyl methyl cellulose ether and 0.6-0.9% of polypropylene fiber into the cement mortar, and uniformly stirring to obtain slurry A; step S3: adding 6-9% of clay and 0.6-0.9% of dispersed emulsion powder into the slurry A, and stirring and uniformly mixing to obtain slurry B; step S4: foaming 3.5-4.5% of foaming agent, adding 0.2-0.4% of foam stabilizer and 0.2-0.4% of plasticizer, uniformly stirring, adding the generated foam into the slurry B, and uniformly stirring to obtain the light foam concrete.
Example 3.
A foam concrete with strong light weight and performance is composed of the following raw materials in percentage by weight: 48-52% of cement, 14-16% of fly ash, 7-8% of filler, 1.4-1.6% of water reducing agent, 0.7-0.8% of dispersed latex powder, 0.3-0.4% of plasticizer, 3.8-4.2% of foaming agent, 0.3-0.4% of foam stabilizer, 7-8% of clay, 0.7-0.8% of hydroxypropyl methyl cellulose ether and 0.7-0.8% of polypropylene fiber.
A preparation method of foam concrete with strong light weight and performance comprises the following steps: step S1: uniformly mixing 48-52% of cement, 14-16% of fly ash, 7-8% of filler and 1.4-1.6% of water reducing agent, adding water and stirring to obtain cement mortar; step S2: adding 0.5-1% of dispersed latex powder, 0.7-0.8% of hydroxypropyl methyl cellulose ether and 0.7-0.8% of polypropylene fiber into the cement mortar, and uniformly stirring to obtain slurry A; step S3: adding 7-8% of clay and 0.7-0.8% of dispersed emulsion powder into the slurry A, and stirring and uniformly mixing to obtain slurry B; step S4: foaming 3.8-4.2% of foaming agent, adding 0.3-0.4% of foam stabilizer and 0.3-0.4% of plasticizer, uniformly stirring, adding the generated foam into the slurry B, and uniformly stirring to obtain the light foam concrete.
The preparation method of the invention fully utilizes the wastes such as cement, fly ash and filler, reduces the consumption of cement, improves the performance of the foam concrete, saves the production cost of the building, and solves the problems of high cement proportion in the foam concrete, poor stability during pouring (pouring), mold collapse caused by too low consumption of cement and poor strength.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (7)
1. A foam concrete with strong light weight and performance is characterized in that: the composite material consists of the following raw materials in percentage by weight: 40-60% of cement, 10-20% of fly ash, 5-10% of filler, 1-2% of water reducing agent, 0.5-1% of dispersed latex powder, 0.1-0.5% of plasticizer, 2-5% of foaming agent, 0.1-0.5% of foam stabilizer, 5-10% of clay, 0.5-1% of hydroxypropyl methyl cellulose ether and 0.5-1% of polypropylene fiber.
2. A method for preparing the high-light-weight foam concrete as claimed in claim 1, which is characterized in that: step S1: uniformly mixing 40-60% of cement, 10-20% of fly ash, 5-10% of filler and 1-2% of water reducing agent, adding water and stirring to obtain cement mortar; step S2: adding 0.5-1% of dispersed latex powder, 0.5-1% of hydroxypropyl methyl cellulose ether and 0.5-1% of polypropylene fiber into the cement mortar, and uniformly stirring to obtain slurry A; step S3: adding 5-10% of clay and 0.5-1% of dispersed latex powder into the slurry A, and uniformly stirring to obtain slurry B; step S4: foaming 2-5% of foaming agent, adding 0.1-0.5% of foam stabilizer and 0.1-0.5% of plasticizer, uniformly stirring, adding the generated foam into the slurry B, and uniformly stirring to obtain the foam concrete with strong light weight and performance.
3. The high-performance lightweight foam concrete according to claim 1, wherein: the foam stabilizer is prepared from aluminum stearate and xanthan gum according to the mass ratio of 1: 5.
4. The high-performance lightweight foam concrete according to claim 1, wherein: the foaming agent is one or two of alkyl sulfonate, hydroxyalkyl ether sulfonate and alkyl ether sulfonate.
5. The high-performance lightweight foam concrete according to claim 1, wherein: the plasticizer is citrate esters.
6. The high-performance lightweight foam concrete according to claim 1, wherein: the water reducing agent is polycarboxylic acid.
7. The high-performance lightweight foam concrete according to claim 1, wherein: the filler is one or more of fine river sand, fine stone powder or fine mineral powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010416375.1A CN111574119A (en) | 2020-05-17 | 2020-05-17 | Foam concrete with high light weight and performance and preparation method thereof |
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| CN202010416375.1A CN111574119A (en) | 2020-05-17 | 2020-05-17 | Foam concrete with high light weight and performance and preparation method thereof |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111960856A (en) * | 2020-08-27 | 2020-11-20 | 陈谓清 | Heat-insulating sound-insulating concrete and preparation method and construction method thereof |
| CN112777990A (en) * | 2021-01-11 | 2021-05-11 | 山东大学 | Solid waste base light heat-insulating concrete 3D printing material and preparation method thereof |
| CN113292268A (en) * | 2021-06-24 | 2021-08-24 | 河南恒道中原轨道交通科技有限公司 | Additive for lightweight concrete plate, concrete and preparation method of lightweight concrete plate |
| CN113816655A (en) * | 2021-08-13 | 2021-12-21 | 闽南理工学院 | Fiber-reinforced foam concrete material and preparation process thereof |
| CN113896450A (en) * | 2021-09-22 | 2022-01-07 | 西安理工大学 | Powder foaming agent for preparing cement-based foam material and preparation method thereof |
| CN114105675A (en) * | 2021-12-08 | 2022-03-01 | 苏州金螳螂建筑装饰股份有限公司 | Preparation method of foamed concrete and ground stone nondestructive paving design structure |
| CN114560667A (en) * | 2022-03-31 | 2022-05-31 | 武昌理工学院 | Lightweight energy-saving foam concrete and preparation method thereof |
| CN114835429A (en) * | 2022-04-13 | 2022-08-02 | 山东泓畅建材有限公司 | Foam concrete additive |
| CN116161911A (en) * | 2023-03-02 | 2023-05-26 | 武昌理工学院 | Sound insulation foam wallboard and preparation method thereof |
| CN117447229A (en) * | 2023-10-26 | 2024-01-26 | 山东智胜节能建材有限公司 | Self-heat-preservation building block and preparation method thereof |
| CN117549415A (en) * | 2023-11-13 | 2024-02-13 | 山东智胜节能建材有限公司 | Manufacturing method of assembled waterproof fireproof heat-insulating wallboard |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104355656A (en) * | 2014-10-22 | 2015-02-18 | 贵州省栋梁建材有限责任公司 | Foam concrete and preparation method thereof |
| CN105541394A (en) * | 2015-12-18 | 2016-05-04 | 江苏兆通工程技术有限公司 | Foamed concrete |
| CN107324735A (en) * | 2017-07-13 | 2017-11-07 | 重庆大学 | A kind of ultralight foam concrete and preparation method thereof |
| JP2017210378A (en) * | 2016-05-23 | 2017-11-30 | デンカ株式会社 | Composition and non-flammable material |
-
2020
- 2020-05-17 CN CN202010416375.1A patent/CN111574119A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104355656A (en) * | 2014-10-22 | 2015-02-18 | 贵州省栋梁建材有限责任公司 | Foam concrete and preparation method thereof |
| CN105541394A (en) * | 2015-12-18 | 2016-05-04 | 江苏兆通工程技术有限公司 | Foamed concrete |
| JP2017210378A (en) * | 2016-05-23 | 2017-11-30 | デンカ株式会社 | Composition and non-flammable material |
| CN107324735A (en) * | 2017-07-13 | 2017-11-07 | 重庆大学 | A kind of ultralight foam concrete and preparation method thereof |
Non-Patent Citations (3)
| Title |
|---|
| 李玉龙: "《高分子材料助剂》", 30 September 2008, 化学工业出版社 * |
| 王长龙: "《铁尾矿综合利用基础研究》", 31 January 2015, 中国建材工业出版社 * |
| 郑晓宇等: "《油田化学品》", 31 January 2001, 化学工业出版社 * |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111960856A (en) * | 2020-08-27 | 2020-11-20 | 陈谓清 | Heat-insulating sound-insulating concrete and preparation method and construction method thereof |
| CN112777990A (en) * | 2021-01-11 | 2021-05-11 | 山东大学 | Solid waste base light heat-insulating concrete 3D printing material and preparation method thereof |
| CN113292268A (en) * | 2021-06-24 | 2021-08-24 | 河南恒道中原轨道交通科技有限公司 | Additive for lightweight concrete plate, concrete and preparation method of lightweight concrete plate |
| CN113816655A (en) * | 2021-08-13 | 2021-12-21 | 闽南理工学院 | Fiber-reinforced foam concrete material and preparation process thereof |
| CN113896450A (en) * | 2021-09-22 | 2022-01-07 | 西安理工大学 | Powder foaming agent for preparing cement-based foam material and preparation method thereof |
| CN114105675A (en) * | 2021-12-08 | 2022-03-01 | 苏州金螳螂建筑装饰股份有限公司 | Preparation method of foamed concrete and ground stone nondestructive paving design structure |
| CN114560667A (en) * | 2022-03-31 | 2022-05-31 | 武昌理工学院 | Lightweight energy-saving foam concrete and preparation method thereof |
| CN114835429A (en) * | 2022-04-13 | 2022-08-02 | 山东泓畅建材有限公司 | Foam concrete additive |
| CN116161911A (en) * | 2023-03-02 | 2023-05-26 | 武昌理工学院 | Sound insulation foam wallboard and preparation method thereof |
| CN116161911B (en) * | 2023-03-02 | 2024-05-24 | 武昌理工学院 | Sound insulation foam wallboard and preparation method thereof |
| CN117447229A (en) * | 2023-10-26 | 2024-01-26 | 山东智胜节能建材有限公司 | Self-heat-preservation building block and preparation method thereof |
| CN117549415A (en) * | 2023-11-13 | 2024-02-13 | 山东智胜节能建材有限公司 | Manufacturing method of assembled waterproof fireproof heat-insulating wallboard |
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