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

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 ...

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.