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Autoclaved fly ash brick

A technology of autoclaving fly ash bricks and fly ash, which is applied in the field of building materials, can solve the problems of low fly ash addition, high cost, and high price, and achieve the effect of reducing costs

Inactive Publication Date: 2011-09-14
SHANGHAI DATUN ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of the above-mentioned autoclaved fly ash hollow bricks are: the admixture of fly ash is low, and the price of lime and cement is high, resulting in high brick cost.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Ingredients: fly ash 38%, carbide slag 26%, yellow sand 28%, stone chips 8%, gypsum 2%.

[0022] Manufacturing process: Add water and stir the above raw materials to obtain a mixture with a moisture content of 11-14% → digest the mixture → mix and grind → form → finally make autoclaved fly ash bricks after high temperature and high pressure curing; the curing pressure is 1.3 MPa, the curing temperature is 190°C, and the curing time is 8h.

[0023] After testing, the compressive strength of the autoclaved fly ash bricks produced is greater than 20 MPa, and can withstand the frost resistance requirements of 15 freeze-thaw cycles.

Embodiment 2

[0025] Ingredients: fly ash 40%, carbide slag 25%, yellow sand 25%, stone chips 7%, gypsum 2%.

[0026] Manufacturing process: Add water and stir the above raw materials to obtain a mixture with a moisture content of 11-14% → digest the mixture → mix and grind → form → finally make autoclaved fly ash bricks after high temperature and high pressure curing; the curing pressure is 1.3 MPa, the curing temperature is 190°C, and the curing time is 8h.

[0027] After testing, the compressive strength of the autoclaved fly ash bricks prepared by the two ingredients is greater than 15 MPa, and can withstand the frost resistance requirements of 15 freeze-thaw cycles.

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Abstract

The invention discloses an autoclaved fly ash brick and relates to the technical field of building materials. The autoclaved fly ash hollow brick is characterized by consisting of the following components in percentage by weight: 35 to 45 percent of fly ash, 20 to 28 percent of carbide slag, 20 to 30 percent of yellow sand, 7 to 14 percent of stone chips and 1 to 2 percent of gypsum. The autoclaved fly ash brick manufactured by the scheme has the advantage that: according to detection, various technical indexes reach the national standard. A great amount of carbide slag is added into the raw materials, so the cost of the autoclaved fly ash brick is reduced.

Description

technical field [0001] The invention relates to a fly ash hollow brick, in particular to an autoclaved fly ash brick with fly ash as the main raw material. It belongs to the technical field of building materials. Background technique [0002] At present, autoclaved fly ash hollow bricks are generally made of fly ash and coal gangue discharged from power plants as the main raw materials, together with cement, lime, and yellow sand. After mixing, digestion, and molding, they are made by high temperature and high pressure curing. The temperature is generally above 174.5°C, and the working pressure is above 0.8MPa. The active components in the bricks are fully hydrothermally reacted, so the bricks have high strength and stable performance. The produced bricks have high density and strength. The disadvantages of the above-mentioned autoclaved fly ash hollow bricks are: the admixture of fly ash is low, and the prices of lime and cement are high, resulting in high cost of bricks....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14C04B18/30
CPCY02W30/91
Inventor 陈为信解德华王建贵李化赵宗先
Owner SHANGHAI DATUN ENERGY
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