The invention belongs to the technical field of building wall materials, and particularly relates to
autoclaved aerated concrete containing
coal gangue and iron
tailings and a preparation method of the
autoclaved aerated concrete. The
autoclaved aerated concrete containing the
coal gangue and the iron
tailings is prepared from the following raw materials in parts by weight: 5 to 30 parts of the
coal gangue, 15 to 25 parts of aluminum
slag, 30 to 55 parts of the iron
tailings, 5 to 15 parts of nanoscale
silicon dioxide, 5 to 15 parts of
metakaolin, 10 to 15 parts of quick
lime, 0 to 5 parts of
cement and the balance of waste materials. Auxiliary materials include aluminum
powder, a foam stabilizer and a water
reducing agent. In the raw materials, the iron tailings and the
coal gangue are used as siliceous materials, so that the environmental problem caused by
solid waste stockpiling can be solved, waste is turned into wealth, and meanwhile, a good effect is achieved on the
sustainable development of the society. The prepared concrete block has good physical and mechanical properties and durability, the product performance meets the
national standard requirement, and 04-grade, 05-grade, 06-grade and 07-grade concrete blocks can be produced according to different proportions and
process systems.