Method for producing aerated concrete by using ultrafine fly ash and slag

A technology of aerated concrete and fly ash, which is applied in the field of composite materials, can solve the problems of low comprehensive utilization rate, low product grade, dust pollution, etc., and achieve the effects of reducing production costs, reducing processing costs, and reducing thermal conductivity

Inactive Publication Date: 2019-03-08
遵义景程环保材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example: a) ultra-fine fly ash and slag and their products fluctuate greatly in performance, lack durability, and low degree of resource utilization; b) the product grade is slightly low, and the profit margin of the enterprise is low, which affects the enthusiasm of the enterprise; c) the utilization method is comparatively low. Single, the main channel is still road construction, building materials, concrete and cement, etc., and is greatly affected by the season, the comprehensive utilization rate is low, and there are significant regional differences; d) In the process of comprehensive utilization, there are still some environmental impact Some negative impacts, such as dust pollution from ash storage yards and transport vehicles, disposal of waste residues after extracting useful substances, accumulation of heavy metals in the process of agricultural use, and radioactive problems in building materials, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Method for producing air-entrained concrete with ultra-fine fly ash and slag: the air-entrained concrete composition contains 57%

[0037] Superfine fly ash and slag, 20% quicklime, 10% P.0.42.5 ordinary Portland cement, 3% gypsum, 10% superfine fly ash and slag.

[0038] The total water-to-material ratio is 0.5-0.8, and the mixing water is warm water at 70°C. Add water to superfine fly ash and slag to make slurry, stir for 3-4 minutes, add cement, stir for 3-4 minutes, add gypsum, stir for 2-3 minutes, add quicklime, stir for 2-3 minutes, pump until pouring In the vehicle slurry mixing tank, turn on the pouring vehicle owner's mixer for secondary mixing. Add the measured ultra-fine fly ash and slag, stir for 30-50s, inject into the mold to generate gas, stop at 60°C for 2 hours, and cut into pieces. Send it into an autoclave, autoclave at 165°C and a pressure of 0.8-1.2MPa, and leave the autoclave at a constant temperature for 8-10 hours.

[0039] The product leaves...

Embodiment 2

[0041] Method for producing air-entrained concrete with ultra-fine fly ash and slag: the air-entrained concrete composition contains 57% granulated ultra-fine fly ash and slag, 20% quicklime, 10% P.0.42.5 ordinary portland cement , 3% gypsum, 10% superfine fly ash and slag.

[0042]The total water-to-material ratio is 0.5-0.8, and the mixing water is warm water at 70°C. Add water to granulated ultra-fine fly ash and slag to make slurry, stir for 3-4 minutes, add cement, stir for 3-4 minutes, add gypsum, stir for 2-3 minutes, add quicklime, stir for 2-3 minutes, pump Put it into the slurry mixing tank of the pouring car, turn on the main mixer of the pouring car, and perform the second mixing. Add the measured ultra-fine fly ash and slag, stir for 30-50s, inject into the mold to generate gas, stop at 60°C for 2 hours, and cut into pieces. Send it into the autoclave, autoclave at 180-190°C and 1.0-1.2MPa pressure, and leave the autoclave at constant temperature for 6-8 hours. ...

Embodiment 3

[0045] Method for producing air-entrained concrete with ultra-fine fly ash and slag: the air-entrained concrete composition contains 38-42% ultra-fine fly ash and slag, 30-32% slag, 18-20% P.0.42.5 ordinary Portland cement, 10% ultra-fine fly ash and slag, and an appropriate amount of gas-generating regulator.

[0046] The total water-to-material ratio is 0.30-0.50, and the mixing water is warm water at 70°C. Mix slag, ultra-fine fly ash and slag and cement dry powder evenly, beat and mix evenly, stir for 3-4 minutes, pump it into the slurry mixing tank of the pouring car, turn on the main mixer of the pouring car, and perform the second mixing. Add the measured ultra-fine fly ash and slag, stir for 15-30s, inject into the mold to generate gas, stop at 60°C for 2 hours, and cut into pieces. Send it into the autoclave, autoclave at 210°C and 1.5MPa pressure, and leave the autoclave at constant temperature for 6-8 hours.

[0047] The product leaves the factory after 4-7 days o...

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Abstract

The invention relates to a method for producing aerated concrete by using ultrafine fly ash and slag, and discloses the method for producing aerated concrete by using ultrafine fly ash and slag and apreparation technology thereof. Based on mass percent, the addition amount of the raw material is 50-70% of ultrafine fly ash and slag, 10-20% of silicate cement, 5-20% of quick lime and 5-10% of dihydrate gypsum. Compared with the prior art, the method for producing the aerated concrete by using the ultrafine fly ash and slag has the following advantages that (1) the method for producing the aerated concrete by using a large amount of ultrafine fly ash and slag belongs to the resource utilization technology, and expensive processing cost can be greatly reduced; and (2) the metallic aluminum component is fully utilized.

Description

technical field [0001] The invention relates to a composite material, in particular to a method for producing air-entrained concrete with superfine fly ash and slag and its preparation technology. Background technique [0002] With the rapid development of my country's economy, power plants and urban heating projects continue to increase, and the output of ultra-fine fly ash and slag also increases. In 2006, my country's thermal power plants alone produced about 240 to 290 million tons of ultra-fine fly ash and slag and 0.2 to 30 million tons of slag, ranking first in the world. At present, the utilization rate of ultra-fine fly ash and slag in western developed countries has reached more than 80%, while in our country it is only about 30% to 40%. Most of the unused ultra-fine fly ash and slag are discharged into ash storage plants, landfills or rivers, lakes and seas. The accumulation of ultra-fine fly ash and slag not only takes up a lot of land, but also causes serious ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B38/02
CPCC04B28/04C04B38/02C04B18/08C04B18/141C04B22/064C04B22/143
Inventor 杨媛
Owner 遵义景程环保材料有限公司
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