Method for preparing building sheet material by using coal ash and product prepared by using method

A technology for fly ash and construction, which is applied in the field of preparing building boards, which can solve the problems of poor sound insulation effect and small amount of fly ash, and achieve the effects of enhanced sound insulation effect, energy saving, and good heat preservation effect

Active Publication Date: 2014-04-30
CHINA SHENHUA ENERGY CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The quality of the wallboard obtained by this technology is relatively light, but there is still the disadvantage that the amount of fly ash is small, and the thickness of the wallboard is relatively thin, and the sound insulation effect is poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Take 40 parts of fly ash, 40 parts of cement, 6 parts of sodium hydroxide, and 14 parts of gypsum in parts by weight, mix well to obtain solid phase material, add 35 parts of water and stir for 20 minutes; then add 4.6 parts of 3% phosphoric acid solution, Stir for 15 minutes, then add 3.7 parts of 4% foaming agent solution, and stir for 15 minutes to obtain slurry.

[0034] Put the wall panel mold on the platform, pour the obtained slurry into the steel mold forming mold, then place it on a vibrating table to vibrate for 20 minutes to form, and smooth the upper layer of slurry to obtain a semi-finished board.

[0035] The sample was cured at room temperature for 2 hours, sent to an autoclave for curing for 11 hours after demoulding, and then cured for 50 hours at room temperature and under ventilated conditions after taking it out. The cured wallboard is modified by soaking in water for 20 hours to obtain a crude board.

[0036] Cut the edge of the rough board obtaine...

Embodiment 2

[0040] Take 50 parts of fly ash, 30 parts of cement, 10 parts of sodium hydroxide, and 10 parts of gypsum in parts by weight, mix well to obtain solid phase material, add 41 parts of water and stir for 25 minutes; then add 5.3 parts of 5% phosphoric acid solution, Stir for 20 minutes, then add 4.3 parts of 8% blowing agent solution, and stir for 20 minutes to obtain a slurry.

[0041] Put the wallboard mold on the platform, pour the obtained slurry into the steel mold forming mold, then place it on a vibrating table to vibrate for 22 minutes to form, and smooth the upper layer of slurry to obtain a sample.

[0042]The sample was cured at room temperature for 2.5 hours, demolded and sent to an autoclave for curing for 12 hours, and then taken out and then cured for 60 hours at room temperature and under ventilated conditions. Soak the cured wallboard in water for modification for 21 hours to obtain a crude board.

[0043] Cut the edge of the obtained rough plate, polish it, an...

Embodiment 3

[0047] Take 55 parts of fly ash, 25 parts of cement, 12 parts of sodium hydroxide, and 8 parts of gypsum in parts by weight, mix well to obtain a solid phase material, add 45 parts of water and stir for 30 minutes; then add 5.5 parts of 8% phosphoric acid solution, Stir for 15 minutes, then add 4.7 parts of 12% foaming agent solution, and stir for 20 minutes to obtain slurry.

[0048] Put the wall panel mold on the platform, pour the obtained slurry into the steel mold forming mold, then place it on a vibrating table to vibrate for 24 minutes to form, and smooth the upper layer of slurry to obtain a semi-finished board.

[0049] The sample was cured at room temperature for 3 hours, sent to an autoclave for curing for 13 hours after demoulding, and then cured for 68 hours at room temperature and ventilated conditions after taking it out. The cured wallboard is modified by soaking in water for 22 hours to obtain a crude board.

[0050] Cut the edge of the rough board obtained, ...

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Abstract

The invention discloses a method for preparing a building sheet material by taking coal ash as a main raw material. The method comprises the following steps: weighing following components in parts by weight: 35-60 parts of the coal ash, 20-45 parts of cement, 4-15 parts of sodium hydroxide and 6-16 parts of gypsum; uniformly mixing and adding water, a phosphoric acid solution and a foaming agent solution to obtain slurry; pouring the slurry into a molding mould; vibrating and molding; curing at a room temperature; demolding and conserving in an autoclave; conserving at the room temperature; and finally, putting the material into the water to be subjected to modification treatment and drying to obtain the product. The invention further discloses a product prepared by the method. The method is good for treating the coal ash; the prepared sheet material has great strength and good anti-bending and anti-pressing performance, has a certain waterproof performance, has good heat-insulation and sound insulation effects, and is light in weight, simple in production process and low in cost.

Description

technical field [0001] The invention relates to a method for preparing building boards and products prepared by the method. Background technique [0002] Fly ash is the largest industrial solid waste material produced by coal-fired power plants. According to statistics, the total accumulation of fly ash in my country will reach more than 3 billion tons by 2020. Fly ash accumulation occupies land and causes air and water pollution, land desertification and alkalization and other problems have had a great impact on the environment, and comprehensive utilization of fly ash is imminent. The building board prepared by using fly ash as raw material not only protects the environment, but also saves energy. [0003] At present, there are many technologies for using fly ash to prepare building boards. In the prior art, in order to ensure the strength of the product, traditional materials such as cement or sand are generally used as the main raw materials, and the amount of fly ash...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B18/08
CPCY02W30/91
Inventor 池君洲白健韩建国王丽萍张小东袁明图亚王珍
Owner CHINA SHENHUA ENERGY CO LTD
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