Aerated concrete block and preparation method thereof

Abstract

The invention relates to an aerated concrete block and a preparation method thereof, belonging to the technical fields of comprehensive metallurgy solid waste resource utilization and novel energy-saving construction material industries. In order to treat and utilize coal ash to the maximum limit, the coal ash addition amount in raw material proportion is increased, the coal ash addition ratio is increased to be 75-80% from 70-72%, various technique parameters are matched and adjusted, the raw material machining process is improved, the aerated concrete block is prepared from the following raw materials in percentage by mass: 75-80% of coal ash, 15-20% of quick lime, 1-2% of cement, 2.0-3.0% of desulfurization gypsum and 0.8-1.0% of Al powder through processes of machining raw materials, blending the raw materials, stirring, casting, standing, demolding, cutting, steaming and compressing, and maintaining. The production and operation cost of comprehensive coal ash utilization enterprises is lowered, the disordered pouring and discharge amount of the coal ash is reduced, and the risk that the environment is polluted by the coal ash is reduced.

Description

technical field [0001] The invention relates to an aerated concrete block and a preparation method thereof, and belongs to the technical field of comprehensive utilization technology of metallurgical solid waste resources and the industry of new energy-saving building materials. Background technique [0002] China's development of new wall materials (fly ash aerated concrete blocks, fly ash autoclaved standard bricks) to replace solid clay bricks has important social and economic benefits such as protecting cultivated land, saving energy, utilizing waste residues, controlling environmental pollution, and improving building functions. benefit. At present, there are 120,000 brick and tile enterprises in the country, with an annual production capacity of more than 600 billion standard bricks and 1.43 billion cubic meters of soil, which is equivalent to destroying 1.2 million mu of land; its production energy consumption is about 60 million tons of standard coal per year. Every ...

AI Technical Summary

Problems solved by technology

There is still a large amount of fly ash that needs to be discharged and disposed of every year, which poses a huge threat to the environment around the city and is also a huge waste of energy. There is an urgent need for a production technology with a high content of fly ash.