Color:pale yellow, H2O:1, Pseudo-density:0.33g/cm3, Loss by calcine:1, PH:6-8, SiO2:85, Al2O3:≤5, Fe2O3:1.8, Permeability:0.1-0.3, Wet density:0.40g/cm3, +150 mesh seive residue: 0-1%, +320 mesh seive residue:0-3%