Effect of heat treatment temperature on cementitious activity of red mud

The effect of heat treatment temperature on the cementitious activity of red mud is studied in the paper through analyzing the properties of the red mud heated at different temperatures.The red mud heated at different temperatures and the hydration pastes were determined with XRD,DSC-TG and FT-IR.The results show that the crystal composition of red mud changes during heating process;in the red mud heated at 800℃ the content of β-C2S increases obviously,and the coordination of Al transforms from 4 to 6;the cementitious activity of red mud at different temperatures: red mud heated at 600℃ red mud without heating red mud heated at 800℃.