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Autoclaved aerated concrete and preparation method thereof

A technology of air-entrained concrete and autoclaved air-entrainment, which is applied in the field of construction materials to reduce the cost of raw materials, reduce the impact on the environment, and alleviate the shortage of supply

Active Publication Date: 2014-10-01
JIANGSU XINGUANG ENVIRONMENTAL PROTECTION ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art, provide an autoclaved aerated concrete and its preparation method, alleviate the environmental pollution problems caused by the storage and treatment of carbide slag and desulfurized fly ash, and provide aerated concrete with new source of raw material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The dry material of the air-entrained concrete of the present embodiment includes calcareous material and siliceous material, and by weight, described calcareous material includes cement 4%, quicklime 12%, desulfurization gypsum 2% and carbide slag 7.935%; The dry material includes 18% red mud, 38% desulfurized fly ash and 18% ordinary fly ash; the dry material also includes 0.065% aluminum powder; the weight ratio of water and dry material is 0.54.

[0018] The cement in this embodiment is Portland cement with a strength grade of 32.5.

[0019] The quicklime in this embodiment is the digested lime calcined at 1100-1200° C., and the digestion time is 10-20 minutes.

[0020] The weight content of CaO in the quicklime of this embodiment is greater than 65%, and the weight content of MgO is less than 8%.

[0021] The quicklime, desulfurized fly ash, red mud, desulfurized gypsum, ordinary fly ash and carbide slag of this embodiment all pass through a 300-mesh sieve. Alumi...

Embodiment 2

[0024] The dry material of the air-entrained concrete of the present embodiment includes calcareous material and siliceous material, and by weight, described calcareous material includes cement 8%, quicklime 14%, desulfurization gypsum 2% and carbide slag 5.93%; The dry material includes 20% red mud, 30% desulfurized fly ash and 20% ordinary fly ash; the dry material also includes 0.07% aluminum powder; the weight ratio of water and dry material is 0.59.

[0025] The cement in this embodiment is Portland cement with a strength grade of 32.5 or higher.

[0026] The quicklime in this embodiment is the digested lime calcined at 1100-1200° C., and the digestion time is 10-20 minutes.

[0027] The weight content of CaO in the quicklime of this embodiment is greater than 65%, and the weight content of MgO is less than 8%.

[0028] The quicklime, desulfurized fly ash, red mud, desulfurized gypsum, ordinary fly ash and carbide slag of this embodiment all pass through a 300-mesh sieve...

Embodiment 3

[0031] The dry material of the air-entrained concrete of the present embodiment includes calcareous materials and siliceous materials, and by weight, the described calcareous materials include cement 5%, quicklime 10%, desulfurized gypsum 3% and calcium carbide slag 7.93%; The dry material includes 18% red mud, 32% desulfurized fly ash and 24% ordinary fly ash; the dry material also includes 0.07% aluminum powder; the weight ratio of water and dry material is 0.56.

[0032] The cement in this embodiment is Portland cement with a strength grade of 32.5 or higher.

[0033] The quicklime in this embodiment is the digested lime calcined at 1100-1200° C., and the digestion time is 10-20 minutes.

[0034] The weight content of CaO in the quicklime of this embodiment is greater than 65%, and the weight content of MgO is less than 8%.

[0035] The quicklime, desulfurized fly ash, red mud, desulfurized gypsum, ordinary fly ash and carbide slag of this embodiment all pass through a 300...

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Abstract

The invention discloses autoclaved aerated concrete and a preparation method thereof. The calcium material comprises 4-8% of cement, 10-14% of quick lime, 2-3% of desulphurized gypsum, and 5-8% of acetylene sludge, the silicone material comprises 15-20% of red mud, 30-40% of desulfurized coal ash, and 15-25% of common coal ash, the dry materials also comprise 0.065-0.07% of aluminum powder, and the weight ratio of the water to the dry materials is 0.54-0.58. At room temperature, the dry materials are mixed and then are added with water and mixed uniformly, and the preparation of the autoclaved aerated concrete costs 5.5 hours at constant temperature and constant pressure of 1.1MPa. The autoclaved aerated concrete mainly comprises wastes like acetylene sludge, desulphurized coal ash and so on, thereby being beneficial to solving environment pollution caused by stacking of the acetylene sludge and desulphurized coal ash, and opening up a new way for recycling of the acetylene sludge and desulphurized coal ash.

Description

[0001] technical field [0002] The invention relates to a building material, in particular to an autoclaved aerated concrete and a preparation method thereof. Background technique [0003] With the development of society, the country implements the wall reform policy to achieve the purpose of protecting land and saving energy. In recent years, more and more types of new wall materials have appeared in the society, among which there are more applications, such as gypsum or cement lightweight partition boards, color steel plates, aerated concrete blocks, steel wire grid foam boards, small Concrete hollow blocks, gypsum boards, gypsum blocks, ceramsite blocks, sintered porous bricks, shale bricks, solid concrete bricks, PC slabs, horizontal hole concrete wall panels, activated carbon walls, new partition wall panels, etc. New wall materials are new types of wall materials that are different from traditional wall materials such as bricks and tiles, limestone, etc., and inc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/10C04B38/02
Inventor 王卫东高琍玲马成良蒋立新张营
Owner JIANGSU XINGUANG ENVIRONMENTAL PROTECTION ENG
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