Theoretical basis of preparing concrete from bauxite tailings

The reaction activity comes from the conversion of external energy into the surface energy of particles during grinding, which makes the surface in metastable state, in which the active SiO2 _ 2 component and hydrated calcium aluminate form hydrated garnet. Bauxite is composed of various hydrated silicates and a certain amount of alumina, alkali metal oxides and alkaline earth metal oxides, and contains impurities such as feldspar, mica, sulfate, sulfide and carbonate, such as kaolin, montmorillonite and diaspore. Most tailings containing clay are activated by thermal activation process. At a certain temperature, the clay mineral structure in tailings is dehydrated to form an unstable phase, which has certain reactivity.