CN111018460A - Preparation method of high-strength aerated brick - Google Patents
Preparation method of high-strength aerated brick Download PDFInfo
- Publication number
- CN111018460A CN111018460A CN201811174685.6A CN201811174685A CN111018460A CN 111018460 A CN111018460 A CN 111018460A CN 201811174685 A CN201811174685 A CN 201811174685A CN 111018460 A CN111018460 A CN 111018460A
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- Prior art keywords
- preparation
- cement
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- aerated brick
- brick
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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
- C04B28/02—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
- C04B28/10—Lime cements or magnesium oxide cements
- C04B28/12—Hydraulic lime
-
- 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
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to the technical field of aerated bricks, in particular to a preparation method of a high-strength aerated brick, which comprises the following steps: a. mixing and stirring the raw materials according to a certain proportion to obtain slurry; b. adding air-entrapping aluminum powder, stirring for 1 minute, and pouring a mold frame; c. gas generation and initial setting; d. cutting the green body; e. steam-pressure curing for 3 hours; f. spraying cement paste on the inner side and the outer side of the brick, and continuing autoclaved curing for 2 hours; g. the autoclaved aerated brick is naturally cured, wherein the autoclaved curing of the aerated brick is divided into two stages, namely autoclaved curing is performed for 3 hours, then cement slurry is sprayed, then the autoclaved curing is continued for 2 hours, the cement slurry can penetrate for a certain thickness from outside to inside, and forms a bonding layer with the aerated brick, so that the surface performance of the aerated brick is improved, the bonding layer has high hardness, is not easy to generate powder, and is easy to bond with mortar.
Description
Technical Field
The invention relates to the technical field of aerated bricks, in particular to a preparation method of a high-strength aerated brick.
Background
The aerated brick, i.e. the autoclaved aerated concrete block, is a light porous silicate product produced by a high-temperature autoclaved equipment process, contains a large amount of uniform and fine air holes after gas generation, has the advantages of light weight, high strength, durability, heat preservation, sound absorption, water resistance, shock resistance, rapid construction (compared with clay sintered bricks), strong processability and the like, and is an excellent novel wall material.
The aerated concrete blocks have the advantages and are more and more widely used in building engineering, but the aerated bricks also have problems, such as easy dusting of the surface and difficult bonding with mortar, and in order to solve the problems, the aerated bricks are built by special mortar with good bonding property when being used for building walls, cement, lime and mortar can be mixed with the mortar, the consistency of the mortar is preferably 5 cm-7 cm, and before plastering of inner walls and bottoming of outer walls, the walls are subjected to roughening treatment and the dola fibers are added into plastering mortar.
Disclosure of Invention
The invention aims to provide a preparation method of a high-strength aerated brick, aiming at the defects of the prior art, and the preparation method is characterized in that cement paste is sprayed on the inner side and the outer side of a brick during autoclaved curing, so that the strength of the surface of the aerated brick is improved, the aerated brick is not easy to generate powder and is easy to bond with mortar.
The technical scheme adopted by the invention for solving the technical problems is as follows: a preparation method of a high-strength aerated brick comprises the following steps: a. mixing and stirring fine sand, fly ash, siliceous slag, lime, cement, water and other aggregates according to a certain proportion to obtain slurry;
b. keeping the temperature of the slurry at 45-55 ℃, adding air-entrapping aluminum powder, stirring for 1 minute, and pouring the slurry into an air-entrapping brick mold frame;
c. sending the mold frame and the slurry inside the mold frame into a primary curing chamber for gas generation and primary setting, wherein the temperature of the primary curing chamber is 50-60 ℃, the primary curing time is 2 hours, and the slurry is solidified into a blank;
d. separating the green body from the mold frame, and cutting the green body to obtain a brick block;
e. conveying the bricks to an autoclave for autoclave curing, wherein the pressure is 1.2-1.8 Mpa, the temperature is 180-210 ℃, and the autoclave time is 3 hours;
f. mixing cement and water to prepare cement paste, spraying the cement paste on the inner side and the outer side of the brick, and then continuing to perform autoclaved curing for 2 hours;
g. and stacking the bricks outdoors, and naturally curing for more than 10 days to obtain the finished aerated brick.
Preferably, the fine sand, the fly ash, the siliceous slag, the lime, the cement and the water are in parts by weight: 0-30 parts of fine sand, 15-25 parts of fly ash, 0-30 parts of siliceous slag, 20-40 parts of lime, 25-35 parts of cement, 300-500 parts of water and less than 15% of other aggregate in total weight.
Preferably, in the step f, the weight ratio of the cement to the water is 0.5-1: 1.
preferably, the air-entraining aluminum powder comprises 18% of air entraining agent, 18% of foam stabilizer, 12% of water reducing agent and the balance aluminum powder.
Preferably, the mesh number of the fine sand, the fly ash, the siliceous slag, the lime, the cement and other aggregates is 40-150 meshes.
The invention has the beneficial effects that: according to the preparation method of the high-strength aerated brick, the autoclaved curing of the aerated brick is divided into two stages, the autoclaved curing is carried out for 3 hours, then the cement paste is sprayed, then the autoclaved curing is carried out for 2 hours, the cement paste can penetrate to a certain thickness from outside to inside, and a bonding layer is formed between the cement paste and the aerated brick, so that the surface performance of the aerated brick is improved, the bonding layer has high hardness, powder is not easy to generate, and the bonding layer is easy to bond with mortar.
Detailed Description
The present invention will be described in further detail with reference to specific examples, but the scope of the present invention is not limited thereto.
The first embodiment.
The preparation method of the high-strength aerated brick comprises the following steps: a. mixing and stirring raw materials according to a certain proportion to obtain slurry, wherein the raw materials comprise fine sand, fly ash, siliceous slag, lime, cement, water and other aggregates, and the fine sand, fly ash, siliceous slag, lime, cement and water comprise the following components in parts by weight: 0-30 parts of fine sand, 15-25 parts of fly ash, 0-30 parts of siliceous slag, 20-40 parts of lime, 25-35 parts of cement and 300-500 parts of water, wherein other aggregates account for less than 15% of the total weight, and the other aggregates can be slag, construction waste and the like.
b. Keeping the temperature of the slurry at 45-55 ℃, adding air-entraining aluminum powder and stirring for 1 minute, adding 0.06 part of air-entraining aluminum powder into 100 parts by weight of other raw materials, wherein the air-entraining aluminum powder comprises 16-20% of air-entraining agent, 16-20% of foam stabilizer, 10-14% of water reducing agent and the balance aluminum powder, and pouring the slurry into an air-entraining brick mold frame.
c. And (3) sending the die frame and the slurry inside the die frame into a primary curing chamber for gas generation and primary setting, wherein the temperature of the primary curing chamber is 50-60 ℃, the primary curing time is 2 hours, and the slurry is solidified into a blank.
d. And separating the green body from the die frame, and cutting the green body to obtain the brick.
e. And (3) conveying the bricks to an autoclave for autoclave curing, wherein the pressure is 1.2-1.8 Mpa, the temperature is 180-210 ℃, and the autoclave time is 3 hours.
f. Mixing cement and water to prepare cement paste, wherein the weight ratio of the cement to the water is 0.5-1: 1, spraying cement paste on the inner side and the outer side of the brick, and continuing to perform autoclaved curing for 2 hours.
g. And stacking the bricks outdoors, and naturally curing for more than 10 days to obtain the finished aerated brick.
The used fine sand, fly ash, siliceous slag, lime, cement, other aggregates and the like are all used after being crushed, and the mesh number is 40-150 meshes.
In the prior art, the material proportion of the aerated brick is more, the aerated brick can be executed according to the relevant requirements of the national standard GB11968-2006, and other processing steps are unchanged or fine-tuned.
Example two.
The raw materials used in this example were: 0 part of fine sand, 20 parts of fly ash, 20 parts of siliceous slag, 30 parts of lime, 25 parts of cement, 300 parts of water and 10 parts of construction waste, and other technical characteristics are the same as those of the first embodiment.
Example three.
The raw materials used in this example were: 10 parts of fine sand, 15 parts of fly ash, 15 parts of siliceous slag, 35 parts of lime, 35 parts of cement, 350 parts of water and 10 parts of construction waste, and other technical characteristics are the same as those of the first embodiment.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (5)
1. A preparation method of a high-strength aerated brick is characterized by comprising the following steps: the method comprises the following steps:
a. mixing and stirring fine sand, fly ash, siliceous slag, lime, cement, water and other aggregates according to a certain proportion to obtain slurry;
b. keeping the temperature of the slurry at 45-55 ℃, adding air-entrapping aluminum powder, stirring for 1 minute, and pouring the slurry into an air-entrapping brick mold frame;
c. sending the mold frame and the slurry inside the mold frame into a primary curing chamber for gas generation and primary setting, wherein the temperature of the primary curing chamber is 50-60 ℃, the primary curing time is 2 hours, and the slurry is solidified into a blank;
d. separating the green body from the mold frame, and cutting the green body to obtain a brick block;
e. conveying the bricks to an autoclave for autoclave curing, wherein the pressure is 1.2-1.8 Mpa, the temperature is 180-210 ℃, and the autoclave time is 3 hours;
f. mixing cement and water to prepare cement paste, spraying the cement paste on the inner side and the outer side of the brick, and then continuing to perform autoclaved curing for 2 hours;
g. and stacking the bricks outdoors, and naturally curing for more than 10 days to obtain the finished aerated brick.
2. The preparation method of the high-strength aerated brick according to claim 1, wherein the preparation method comprises the following steps: the fine sand, the fly ash, the siliceous slag, the lime, the cement and the water are in parts by weight: 0-30 parts of fine sand, 15-25 parts of fly ash, 0-30 parts of siliceous slag, 20-40 parts of lime, 25-35 parts of cement, 300-500 parts of water and less than 15% of other aggregate in total weight.
3. The preparation method of the high-strength aerated brick according to claim 1, wherein the preparation method comprises the following steps: in the step f, the weight ratio of cement to water is 0.5-1: 1.
4. the preparation method of the high-strength aerated brick according to claim 1, wherein the preparation method comprises the following steps: the air-entraining aluminum powder comprises 18% of air entraining agent, 18% of foam stabilizer, 12% of water reducing agent and the balance aluminum powder.
5. The preparation method of the high-strength aerated brick according to claim 1, wherein the preparation method comprises the following steps: the mesh number of the fine sand, the fly ash, the siliceous slag, the lime, the cement and other aggregates is 40-150 meshes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811174685.6A CN111018460A (en) | 2018-10-09 | 2018-10-09 | Preparation method of high-strength aerated brick |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811174685.6A CN111018460A (en) | 2018-10-09 | 2018-10-09 | Preparation method of high-strength aerated brick |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111018460A true CN111018460A (en) | 2020-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811174685.6A Withdrawn CN111018460A (en) | 2018-10-09 | 2018-10-09 | Preparation method of high-strength aerated brick |
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| Country | Link |
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| CN (1) | CN111018460A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1789598A (en) * | 2004-12-16 | 2006-06-21 | 邱则有 | Light reinforced concrete board |
| KR100809804B1 (en) * | 2006-09-28 | 2008-03-04 | 한국전력공사 | Light foam concrete composition using bottom ash, used for sound absorbtion materials, light foam concrete product employing the same and the manufacturing method thereof |
| CN102167619A (en) * | 2011-01-25 | 2011-08-31 | 河海大学 | Low-thermal-conductivity aerated concrete and preparation method thereof |
| CN104557107A (en) * | 2014-12-16 | 2015-04-29 | 山东益丰生化环保股份有限公司盛源新型建材分公司 | Light-weight autoclaved aerated concrete and preparation process thereof |
| CN108341647A (en) * | 2018-04-26 | 2018-07-31 | 合肥金云新材料有限公司 | A kind of air-entrained concrete building block and preparation method thereof |
-
2018
- 2018-10-09 CN CN201811174685.6A patent/CN111018460A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1789598A (en) * | 2004-12-16 | 2006-06-21 | 邱则有 | Light reinforced concrete board |
| KR100809804B1 (en) * | 2006-09-28 | 2008-03-04 | 한국전력공사 | Light foam concrete composition using bottom ash, used for sound absorbtion materials, light foam concrete product employing the same and the manufacturing method thereof |
| CN102167619A (en) * | 2011-01-25 | 2011-08-31 | 河海大学 | Low-thermal-conductivity aerated concrete and preparation method thereof |
| CN104557107A (en) * | 2014-12-16 | 2015-04-29 | 山东益丰生化环保股份有限公司盛源新型建材分公司 | Light-weight autoclaved aerated concrete and preparation process thereof |
| CN108341647A (en) * | 2018-04-26 | 2018-07-31 | 合肥金云新材料有限公司 | A kind of air-entrained concrete building block and preparation method thereof |
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Application publication date: 20200417 |