Preparation method of autoclaved aerated brick

A technology of autoclaved aeration and bricklaying, which is applied in the manufacture of tools, ceramic products, applications, etc. It can solve the problems of calcium carbide mud not being well utilized, high processing costs, and large land occupation, etc., to achieve light bulk density and production The effect of simple process and low production cost

Inactive Publication Date: 2018-06-19
河北美固建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to its high water content and complex composition, a large amount of calcium carbide mud has not been well utilized
At present, the amount of calcium carbide mud accumulated in our country has exceeded 100 million tons, and the processing cost is high and difficult. Stacking it not only takes up a lot of land, but also pollutes the environment
[0004] At present, most of the processing methods of calcium carbide mud are to pile it up idle, and only a small amount is used as auxiliary raw materials for the production of cement, wall bricks, and road materials. However, the method of producing autoclaved aerated bricks with calcium carbide mud as the main raw material has not been reported.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0025] A kind of preparation method of autoclaved aerated bricklaying, its specific implementation process is as follows:

[0026] A. Add 0.3 to 0.6 times the weight of calcium carbide mud into water and stir, then add 0.3 to 0.7 times the weight of calcium carbide mud and add hydrochloric acid with a concentration of 25 to 35% and stir to obtain a slurry;

[0027] B. Add 0.1 to 0.3 times of fly ash, 0.05 to 0.08 times of lime, and 0.0002 to 0.0004 times of the weight of the slurry to the slurry in sequence, and then press to form bricks;

[0028] C. Steam the bricks, the steam curing temperature is 190-210°C, the steam curing pressure is 10-12MPa, the steam curing time is 8-12h, and then the pressure is withdrawn, the temperature is lowered, and the kettle is taken out to obtain autoclaved aerated bricklaying .

Embodiment 1

[0030] A. Add 0.3 times the weight of calcium carbide mud to water and stir, then add 0.3 times the weight of calcium carbide mud and add hydrochloric acid with a concentration of 25% and stir to obtain a slurry;

[0031] B. Add 0.1 times of fly ash, 0.05 times of lime, and 0.0002 times of aluminum powder to the slurry weight successively, then press molding to obtain bricks, and then press molding to obtain bricks;

[0032] C. The bricks are steamed, the steaming temperature is 190°C, the steaming pressure is 10MPa, and the steaming time is 8h, then the pressure is withdrawn, the temperature is lowered, and the kettle is taken out to obtain the autoclaved aerated bricklaying.

[0033] The autoclaved aerated brickwork produced by the present invention is tested for mechanical properties and other performances in the laboratory, and the autoclaved aerated brickwork is cut into cubes of 100mm × 100mm × 100mm for performance testing. The test results are as follows: compressive st...

Embodiment 2

[0035] A. Add water 0.6 times the weight of calcium carbide mud to the calcium carbide mud and stir, then add 0.7 times the weight of calcium carbide mud with a concentration of 35% hydrochloric acid and stir to obtain a slurry;

[0036] B, add 0.3 times of fly ash, 0.08 times of lime, 0.0004 times of aluminum powder in the slurry weight successively, then press molding, obtain brick adobe, then press molding, obtain brick;

[0037] C. The bricks are steam-cured, the steam-curing temperature is 210°C, the steam-curing pressure is 12MPa, and the steam-curing time is 12h, then the pressure is withdrawn, the temperature is lowered, and the kettle is taken out to obtain autoclaved aerated bricklaying.

[0038] The autoclaved aerated brickwork produced by the present invention is tested for mechanical properties and other properties in the laboratory, and the autoclaved aerated brickwork is cut into cubes of 100mm × 100mm × 100mm for performance testing. The test results are as foll...

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Abstract

Belonging to the field of building material preparation, the invention discloses a preparation method of an autoclaved aerated brick. The method includes raw material mixing, rolling and steam curing.The raw materials include carbide slurry, hydrochloric acid, fly ash, lime and aluminum powder. The autoclaved aerated brick prepared by the method provided by the invention has the advantages of light bulk weight, good heat preservation performance, high strength and uniform internal structure of brick body, also can utilize carbide slurry as the raw material, is low in production cost, and is energy saving and environment-friendly.

Description

technical field [0001] The invention relates to the application of calcium carbide mud, in particular to an autoclaved aerated brick laying, which belongs to the field of preparation of building materials. Background technique [0002] Aerated brickwork is made of cement, slag, sand, lime, etc. as the main raw materials. It has the characteristics of light bulk density, high thermal insulation performance, good sound absorption effect, and has certain strength and machinability. It is the earliest used , One of the most widely used lightweight wall materials. [0003] Calcium carbide mud is the residue produced by the hydrolysis of calcium carbide to produce acetylene. It is an emulsion with a solid content of 8-10%, also known as calcium carbide slag. Its main chemical composition is calcium hydroxide, which contains calcium silicate, calcium aluminate, ferrosilicon and Carbon residue and other solid impurities and slag. Due to its high water content and complex compositi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/12C04B38/02B28B3/02B28B11/24C04B111/40
CPCB28B3/02B28B11/245C04B28/12C04B38/02C04B2111/00017C04B2111/40C04B2201/50C04B18/08C04B18/0418C04B22/122
Inventor 张士超张立谦
Owner 河北美固建材有限公司
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