关键词: 赤泥;建筑材料;保温装饰一体化;气孔率;抗压强度

Abstract: The light-weight high-strength thermal insulation and decoration integration building materials was prepared using red mud, construction waste, tile ceramic waste and kaolin as raw materials.The effect of addition of red mud, blowing agent and sintering temperature on the bulk density, porosity, compressive strength of samples were studied.The phase composition and morphology of samples were characterized by X-ray diffraction(XRD)and scanning electron microscopy(SEM).The experimental results show that when the amount of red mud is 35%, blowing agent is 5%, sintering temperature is 1100 ℃, the samples is foamed uniformly and uniform in size, the bulk density is 0.26 g/cm3, the porosity is 73.28%,the closed porosity reached 90.52%,and the compressive strength is 7.83 MPa.

Key words: red mud;building materials;thermal insulation and decoration integration;porosity;compressive strength