energy-saving, light-weight, sound insulation, water proof, fire proof, space-saving, and short construction time. Raw material 1, Core material: cement, EPS and fly ash 2,For sandwich panel has face panel calcium silicon board . All material are Environment friendly. Composition: calcium silicon board(face panel)+ cement and EPS(core)+ calcium silicon board(face panel) Size(L*W*T):1500mm-3000mm* ...