CN117885182A - Forming process of high-strength autoclaved aerated concrete plate - Google Patents
Forming process of high-strength autoclaved aerated concrete plate Download PDFInfo
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- CN117885182A CN117885182A CN202311751834.1A CN202311751834A CN117885182A CN 117885182 A CN117885182 A CN 117885182A CN 202311751834 A CN202311751834 A CN 202311751834A CN 117885182 A CN117885182 A CN 117885182A
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- autoclaved aerated
- aerated concrete
- strength
- concrete
- concrete slab
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- 239000004567 concrete Substances 0.000 title claims abstract description 131
- 238000000034 method Methods 0.000 title claims abstract description 30
- 239000002994 raw material Substances 0.000 claims abstract description 44
- 238000005520 cutting process Methods 0.000 claims abstract description 16
- 229910052751 metal Inorganic materials 0.000 claims abstract description 16
- 239000002184 metal Substances 0.000 claims abstract description 16
- 238000006243 chemical reaction Methods 0.000 claims abstract description 10
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 16
- 238000005187 foaming Methods 0.000 claims description 16
- 239000004568 cement Substances 0.000 claims description 10
- 239000004576 sand Substances 0.000 claims description 9
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 8
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 8
- 239000004571 lime Substances 0.000 claims description 8
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 7
- 239000004088 foaming agent Substances 0.000 claims description 7
- 238000000227 grinding Methods 0.000 claims description 5
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 5
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 5
- 150000002191 fatty alcohols Chemical class 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 238000002360 preparation method Methods 0.000 abstract description 3
- 238000010025 steaming Methods 0.000 abstract description 2
- 238000003825 pressing Methods 0.000 abstract 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 9
- 238000009966 trimming Methods 0.000 description 8
- 238000009413 insulation Methods 0.000 description 5
- 238000001035 drying Methods 0.000 description 4
- 239000002023 wood Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000004566 building material Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000012615 aggregate Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 125000000373 fatty alcohol group Chemical group 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Abstract
The invention relates to the technical field of concrete plate preparation, and discloses a forming process of a high-strength autoclaved aerated concrete plate, which comprises the following steps: s1, placing a pre-prepared high-strength autoclaved aerated concrete raw material in a die; s2, placing the die into an autoclave, applying high pressure and heating; s3, maintaining high pressure and proper temperature for a period of time to enable the concrete raw material to generate steam release and air entrainment reaction; s4, reducing the pressure to solidify the concrete; and S5, taking out the mould to obtain the high-strength autoclaved aerated concrete slab. Through high pressure and suitable temperature, the concrete raw materials fully releases steam and takes place the air entrainment reaction, forms high strength, light panel, uses automatic steaming and pressing equipment and metal mold, improves production efficiency, ensures panel quality and dimensional stability, obtains the panel of required size through cutting and the step of repairing, satisfies various engineering demands. The plate has the characteristics of high strength, light weight, good controllability and the like.
Description
Technical Field
The invention relates to the technical field of concrete slab preparation, in particular to a forming process of a high-strength autoclaved aerated concrete slab.
Background
The autoclaved aerated concrete slab is a novel light porous green environment-friendly building material which takes cement, lime, silica sand and the like as main raw materials, and is added with different numbers of reinforced meshes subjected to corrosion protection treatment according to structural requirements. The autoclaved aerated concrete slab replaces the traditional aerated concrete block and cement slag hollow wall slab, so that the purposes of protecting environment, saving energy, improving the surface quality of a wall body, improving the aesthetic degree of the building, improving the comfort level of indoor environment and the like can be realized besides greatly reducing engineering time, improving engineering installation quality and reducing construction cost.
The autoclaved aerated concrete plate is widely applied to the building industry, and is a building material which is prepared by a series of process flows of raw material preparation, batching, pouring, cutting, autoclaved curing and the like and is subjected to high-pressure steam curing, but the technology is influenced by raw materials, regions and weather, so that the production difficulty is increased, the product quality is difficult to control, and the production cost is high.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a forming process of a high-strength autoclaved aerated concrete plate, which solves the problems that the production difficulty is increased, the product quality is difficult to control and the production cost is higher because the processing technology of the existing autoclaved aerated concrete is influenced by raw materials, regions and weather in the manufacturing process.
In order to achieve the above purpose, the invention is realized by the following technical scheme: a molding process of a high-strength autoclaved aerated concrete plate comprises the following steps:
s1, placing a pre-prepared high-strength autoclaved aerated concrete raw material in a die;
s2, placing the die into an autoclave, applying high pressure and heating;
s3, maintaining high pressure and proper temperature for a period of time to enable the concrete raw material to generate steam release and air entrainment reaction;
s4, reducing the pressure to solidify the concrete;
and S5, taking out the mould to obtain the high-strength autoclaved aerated concrete slab.
Preferably, the concrete raw material consists of cement, sand, silicate, lime and 0.4-0.7 part of foaming expansion agent.
Preferably, in the step S1, the following raw materials are required:
0.6 to 1.3 parts of cement, 1.2 to 2.4 parts of sand, 0.35 to 1.6 parts of silicate, 0.2 to 0.7 part of lime and 0.4 to 0.7 part of foaming expansion agent.
Preferably, in the step S5, the expanded concrete block needs to be cut and trimmed to obtain a high-strength autoclaved aerated concrete slab with a required size.
Preferably, in the step S3, the high pressure is between 10 and 30 MPa.
Preferably, the cutting and finishing steps include cutting the expanded concrete block to size using a cutting tool and finishing using a grinding wheel tool.
Preferably, the 0.4-0.7 part of foaming expansion agent is an organic foaming agent or an inorganic foaming agent, and specifically is fatty alcohol polyoxyethylene ether or aluminum powder.
Preferably, in the step S3, the temperature is suitably 80-120 ℃.
Preferably, in the step S4, the curing time of the concrete is between 4 and 24 hours, and the concrete is required to be cured and dried at the empty frame drying place.
Preferably, in the step S2, the autoclaving device is an autocontrol autoclaving device and is a metal mold.
The invention provides a forming process of a high-strength autoclaved aerated concrete plate. The beneficial effects are as follows:
according to the invention, by applying high pressure and proper temperature, the steam release and the air-entraining reaction can be fully carried out on the concrete raw material, so that the high-strength and light-weight plate is formed, and secondly, the automatic control autoclaved equipment and the metal mould are adopted, so that the production process is more efficient and consistent, and the quality and the size controllability of the plate are ensured. In addition, the proportion of the concrete raw materials can be adjusted according to the needs, the concrete has higher flexibility and adaptability, and the plates with the required size can be obtained through cutting and trimming steps so as to meet specific engineering requirements, and the concrete has the characteristics of high strength, light weight, good controllability and the like.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Embodiment one:
the embodiment of the invention provides a forming process of a high-strength autoclaved aerated concrete plate, which comprises the following steps of:
s1, placing a pre-prepared high-strength autoclaved aerated concrete raw material in a metal mold, wherein the concrete raw material consists of 0.8 part of cement, 2 parts of sand, 1 part of silicate, 0.5 part of lime and 0.6 part of foaming expansion agent, wherein the foaming expansion agent is an organic foaming agent, specifically fatty alcohol polyoxyethylene ether, and the components can generate uniform bubble distribution and higher strength in the autoclaved process;
s2, placing the metal mold into an autoclaved device, applying high pressure and heating, wherein the high pressure is between 26MPa, the autoclaved device is an automatic control autoclaved device, and the high pressure can promote the air bubbles in the concrete raw material to be more uniformly distributed and improve the compactness of the concrete;
s3, maintaining high pressure and proper temperature for a period of time to enable the concrete raw material to generate steam release and air entrainment reaction, wherein the proper temperature is between 80 and 120 ℃, the water evaporation and the bubble formation in the concrete are facilitated under the temperature range, and under the action of the high pressure and the proper temperature, the foaming expansion agent in the concrete raw material can release gas and form bubbles, so that the concrete can obtain lighter density and good heat insulation performance;
s4, reducing pressure to cure the concrete, wherein the concrete curing time is 17h, the concrete curing time depends on the formula and environmental conditions of concrete raw materials, the moisture in the concrete can be gradually reduced in the curing process, the concrete structure is further stabilized, and the cured concrete needs to be placed at an empty frame drying position for curing and airing so as to ensure the strength and stability of the concrete;
s5, taking out the die to obtain the high-strength autoclaved aerated concrete slab, cutting and trimming the expanded concrete block, and trimming by using a grinding wheel tool after cutting to obtain the high-strength autoclaved aerated concrete slab with the required size.
Embodiment two:
the embodiment of the invention provides a forming process of a high-strength autoclaved aerated concrete plate, which comprises the following steps of:
s1, placing a pre-prepared high-strength autoclaved aerated concrete raw material in a metal mold, wherein the concrete raw material consists of 0.8 part of cement, 2 parts of sand, 1 part of silicate, 0.5 part of lime and 0.6 part of foaming expansion agent, wherein the foaming expansion agent is an organic foaming agent, specifically fatty alcohol polyoxyethylene ether, and the components can generate uniform bubble distribution and higher strength in the autoclaved process;
s2, placing the metal mold into an autoclaved device, applying high pressure and heating, wherein the high pressure is between 26MPa, the autoclaved device is an automatic control autoclaved device, and the high pressure can promote the air bubbles in the concrete raw material to be more uniformly distributed and improve the compactness of the concrete;
s3, maintaining high pressure and proper temperature for a period of time to enable the concrete raw material to generate steam release and air entrainment reaction, wherein the proper temperature is between 80 and 120 ℃, the water evaporation and the bubble formation in the concrete are facilitated under the temperature range, and under the action of the high pressure and the proper temperature, the foaming expansion agent in the concrete raw material can release gas and form bubbles, so that the concrete can obtain lighter density and good heat insulation performance;
s4, reducing pressure to cure the concrete, wherein the concrete curing time is 4 hours, the concrete curing time depends on the formula and environmental conditions of concrete raw materials, the moisture in the concrete can be gradually reduced in the curing process, the concrete structure is further stabilized, and the cured concrete needs to be placed at an empty frame drying position for curing and airing so as to ensure the strength and stability of the concrete;
s5, taking out the die to obtain the high-strength autoclaved aerated concrete slab, cutting and trimming the expanded concrete block, and trimming by using a grinding wheel tool after cutting to obtain the high-strength autoclaved aerated concrete slab with the required size.
Embodiment III:
the embodiment of the invention provides a forming process of a high-strength autoclaved aerated concrete plate, which comprises the following steps of:
s1, placing a pre-prepared high-strength autoclaved aerated concrete raw material in a metal mold, wherein the concrete raw material consists of 0.8 part of cement, 2 parts of sand, 1 part of silicate, 0.5 part of lime and 0.6 part of foaming expansion agent, wherein the foaming expansion agent is an organic foaming agent, specifically fatty alcohol polyoxyethylene ether, and the components can generate uniform bubble distribution and higher strength in the autoclaved process;
s2, placing the metal mold into an autoclaved device, applying high pressure and heating, wherein the high pressure is between 26MPa, the autoclaved device is an automatic control autoclaved device, and the high pressure can promote the air bubbles in the concrete raw material to be more uniformly distributed and improve the compactness of the concrete;
s3, maintaining high pressure and proper temperature for a period of time to enable the concrete raw material to generate steam release and air entrainment reaction, wherein the proper temperature is between 80 and 120 ℃, the water evaporation and the bubble formation in the concrete are facilitated under the temperature range, and under the action of the high pressure and the proper temperature, the foaming expansion agent in the concrete raw material can release gas and form bubbles, so that the concrete can obtain lighter density and good heat insulation performance;
s4, reducing pressure to cure the concrete, wherein the concrete curing time is 24 hours, the concrete curing time depends on the formula and environmental conditions of concrete raw materials, the moisture in the concrete can be gradually reduced in the curing process, the concrete structure is further stabilized, and the cured concrete needs to be placed at an empty frame drying position for curing and airing so as to ensure the strength and stability of the concrete;
s5, taking out the die to obtain the high-strength autoclaved aerated concrete slab, cutting and trimming the expanded concrete block, and trimming by using a grinding wheel tool after cutting to obtain the high-strength autoclaved aerated concrete slab with the required size.
Comparative example one:
s1, adopting a traditional wood die.
S2, respectively preparing high-strength autoclaved aerated concrete raw materials according to the formula provided in the first embodiment.
S3, placing the concrete raw material in a metal mold and a wood mold, and respectively molding.
S4, placing the metal mold and the wood mold into automatic control autoclaved equipment, and applying the same high pressure (26 MPa) and proper temperature (80-120 ℃).
S5, keeping the autoclaved time under the conditions of high pressure and proper temperature to enable the concrete raw material to generate steam release and air entrainment reaction. The steaming time was set to the same time according to embodiment one.
And S6, after the pressure is reduced, curing the concrete, wherein the curing time is set to be the same time.
And S7, taking out the mould to obtain the high-strength autoclaved aerated concrete plate.
And (5) comparing indexes such as quality, density, strength, heat insulation performance and the like of the plate.
Comparative example two:
metal die set: the procedure described in example one was followed using a metal mold for molding.
Traditional technology group: the method is operated according to the traditional concrete plate forming process and comprises the following steps:
s1, preparing concrete raw materials including cement, sand, aggregate and the like.
And S2, uniformly stirring the concrete raw material to obtain the concrete paste.
S3, pouring the concrete paste into a wooden mold, and vibrating to remove bubbles.
S4, placing the concrete paste in the wood die at a ventilation position for natural curing, wherein the curing time is 24 hours.
And S5, taking out the mould to obtain the traditional concrete slab.
And (5) comparing indexes such as quality, density, strength, heat insulation performance and the like of the plate.
List one
In summary, the metal mold can enable bubbles in the concrete raw material to be more uniformly distributed, so that the compactness of the plate is improved; under the conditions of high pressure and proper temperature, the foaming expansion agent in the concrete raw material can fully release gas and form a uniformly distributed air hole structure, and by applying high pressure and proper temperature, the concrete raw material can fully generate steam release and air entrainment reaction, so that a high-strength and light plate is formed, and secondly, automatic control autoclaved equipment and a metal mold are adopted, so that the production process is more efficient and consistent, and the quality and the size controllability of the plate are ensured. In addition, the proportion of the concrete raw materials can be adjusted according to the needs, the concrete has higher flexibility and adaptability, and the plates with the required size can be obtained through cutting and trimming steps so as to meet specific engineering requirements, and the concrete has the characteristics of high strength, light weight, good controllability and the like.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The molding process of the high-strength autoclaved aerated concrete slab is characterized by comprising the following steps of:
s1, placing a pre-prepared high-strength autoclaved aerated concrete raw material in a die;
s2, placing the die into an autoclave, applying high pressure and heating;
s3, maintaining high pressure and proper temperature for a period of time to enable the concrete raw material to generate steam release and air entrainment reaction;
s4, reducing the pressure to solidify the concrete;
and S5, taking out the mould to obtain the high-strength autoclaved aerated concrete slab.
2. The process for forming the high-strength autoclaved aerated concrete slab according to claim 1, wherein the concrete raw material consists of cement, sand, silicate, lime and 0.4-0.7 part of foaming expansion agent.
3. The process for forming a high-strength autoclaved aerated concrete slab as recited in claim 2, wherein in the step S1, the following raw materials are needed:
0.6 to 1.3 parts of cement, 1.2 to 2.4 parts of sand, 0.35 to 1.6 parts of silicate, 0.2 to 0.7 part of lime and 0.4 to 0.7 part of foaming expansion agent.
4. The process for forming a high-strength autoclaved aerated concrete slab as recited in claim 1, wherein in the step S5, the expanded concrete block is cut and trimmed to obtain the high-strength autoclaved aerated concrete slab with a required size.
5. The process for forming a high-strength autoclaved aerated concrete slab as recited in claim 1 wherein, in step S3, the high pressure is between 10 and 30 MPa.
6. A process for forming a high strength autoclaved aerated concrete slab in accordance with claim 4 wherein said cutting and finishing steps include cutting the expanded concrete block to size using a cutting tool and finishing using a grinding wheel tool.
7. The process for forming the high-strength autoclaved aerated concrete slab according to claim 3, wherein 0.4-0.7 part of foaming expansion agent is an organic foaming agent or an inorganic foaming agent, and is specifically fatty alcohol polyoxyethylene ether or aluminum powder.
8. The process for forming a high strength autoclaved aerated concrete slab as recited in claim 1 wherein, in step S3, the temperature is suitably between 80-120 ℃.
9. The process for forming the high-strength autoclaved aerated concrete slab according to claim 1, wherein in the step S4, the curing time of the concrete is 4-24 hours, and the concrete is required to be cured and dried at a dry position of an empty frame.
10. The process for forming a high-strength autoclaved aerated concrete slab as recited in claim 1, wherein in the step S2, the autoclaved equipment is an automatic control autoclaved equipment and is a metal mold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311751834.1A CN117885182A (en) | 2023-12-19 | 2023-12-19 | Forming process of high-strength autoclaved aerated concrete plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311751834.1A CN117885182A (en) | 2023-12-19 | 2023-12-19 | Forming process of high-strength autoclaved aerated concrete plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117885182A true CN117885182A (en) | 2024-04-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311751834.1A Pending CN117885182A (en) | 2023-12-19 | 2023-12-19 | Forming process of high-strength autoclaved aerated concrete plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117885182A (en) |
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2023
- 2023-12-19 CN CN202311751834.1A patent/CN117885182A/en active Pending
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