Industrial solid waste autoclaved aerated concrete block and preparation method thereof

A technology of concrete block and autoclaved aeration, which is applied in the field of concrete blocks and can solve the problems of low cost and low energy consumption.

Inactive Publication Date: 2020-10-23
张延年
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a kind of industrial solid waste autoclaved aerated concrete block and its preparation method. The block of the present invent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The industrial solid waste autoclaved aerated concrete block of this embodiment is made of the following raw materials by weight: 35 parts of fly ash, 25 parts of calcium carbide slag, 17 parts of red mud, 4 parts of lime, 5 parts of desulfurized gypsum, 12.5 parts of cement, 1.4 parts of aluminum powder, 0.7 parts of sodium hydroxide, 0.2 parts of water glass, and 0.7 parts of dispersant silica fume.

[0020] The method for preparing industrial solid waste autoclaved aerated concrete blocks includes the following steps:

[0021] ① Grind the fly ash, calcium carbide slag and red mud by weight respectively, and control the particle size to be: red mud ≤ 1mm, fly ash ≤ 0.075 mm, and calcium carbide slag ≤ 0.075 mm;

[0022] ②Add the fly ash, calcium carbide slag and red mud that have been ground in step ① together with the said parts by weight of lime, desulfurized gypsum, cement, sodium hydroxide, water glass, and dispersant silica fume into a mixer to prepare a mixture. Stirr...

Embodiment 2

[0030] The difference between the industrial solid waste autoclaved aerated concrete block of this embodiment and Example 1 is only in the content of the raw materials for preparing the industrial solid waste autoclaved aerated concrete block. The industrial solid waste autoclaved aerated concrete block in this embodiment is made of the following raw materials in parts by weight: 40 parts fly ash, 15 parts calcium carbide slag, 15 parts red mud, 3 parts lime, 3 parts desulfurized gypsum, 10 parts of cement, 1 part of aluminum powder, 0.5 part of sodium hydroxide, 0.1 part of water glass and 0.5 part of dispersant silica fume. The rest is the same as in Example 1.

[0031] The preparation method of the industrial solid waste autoclaved aerated concrete block in this example is the same as that in Example 1.

[0032] The absolute dry density of the industrial solid waste autoclaved aerated concrete block in this embodiment is 517.3 kg / , the compressive strength is 4.46 MPa, the dry ...

Embodiment 3

[0034] The difference between the industrial solid waste autoclaved aerated concrete block of this embodiment and Example 1 is only in the content of the raw materials for preparing the industrial solid waste autoclaved aerated concrete block. The industrial solid waste autoclaved aerated concrete block in this embodiment is made of the following raw materials in parts by weight: 20 parts of fly ash, 30 parts of calcium carbide slag, 20 parts of red mud, 5 parts of lime, 10 parts of desulfurized gypsum, 15 parts of cement, 2 parts of aluminum powder, 1 part of sodium hydroxide, 0.3 parts of water glass and 1 part of dispersant silica fume.

[0035] The preparation method of the industrial solid waste autoclaved aerated concrete block in this example is the same as that in Example 1.

[0036] The absolute dry density of the industrial solid waste autoclaved aerated concrete block in this example is 563.5kg / , the compressive strength is 3.64MPa, the dry shrinkage rate is 0.485mm / m, a...

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Abstract

The invention discloses an industrial solid waste autoclaved aerated concrete block and a preparation method thereof. The concrete block uses fly ash, carbide slag, red mud, lime, desulfurized gypsumand cement as main raw materials and aluminum powder, sodium hydroxide, water glass and the dispersing agent silica fume as additives; the coal ash reacts with components in the carbide slag to generate ettringite, so the strength of the concrete block can be enhanced; a large amount of aluminum oxide contained in the red mud can a replace part of lime and undergo a hydration reaction with the cement, and the aluminum oxide in the red mud can react with calcium hydroxide in the carbide slag, so the strength of the block is enhanced; the coal ash, the carbide slag and the red mud react with oneanother to generate hydrated calcium silicate and hydrated calcium aluminate, so the structural compactness of the block can be improved; and the additives can enhance the foaming stability of the aluminum powder and improve the early strength of the block under an alkaline condition. The method is green and environment-friendly, and the waste of non-renewable resources is effectively reduced.

Description

Technical field [0001] The invention relates to a concrete block, in particular to an industrial solid waste autoclaved aerated concrete block and a preparation method thereof. Background technique [0002] The main sources of industrial solid waste in daily production and life are: coal gangue produced by the coal industry; blast furnace slag, steel slag and red mud produced by the metallurgical industry; fly ash and slag produced by fuel power plants and urban central heating systems; Chemical gypsum, calcium carbide slag, alkali slag, etc. produced by chemical industry and other industries; waste rock and tailings produced by mining metal ores. Large amounts of industrial solid waste are piled up, seriously polluting the environment. At the same time, the process of industrialization and urbanization in my country is accelerating. Large-scale infrastructure construction requires a large amount of building materials, especially wall materials, which requires about 100 million ...

Claims

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Application Information

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IPC IPC(8): C04B38/02C04B28/26C04B111/40
CPCC04B28/26C04B2201/20C04B2201/50C04B2111/40C04B22/04C04B18/0427C04B18/08C04B22/00C04B22/062C04B18/146C04B18/0409C04B22/145C04B38/02C04B38/0067
Inventor 张延年崔长青顾晓薇海洪王亭张于于康楠王铁源闫明程于洋李志军陈志燕杜松岩董宁李琦琦陈昊刘柏男张文洁
Owner 张延年
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