| Physicochemical parameters Index name Φ2 ~ 2.5 Φ2.5 ~ 3.5
Abrasion rate,% ≤ 0.25 ≤ 0.20
Bulk density,g/ml ≥ 0.55 ≥ 0.60
Static water absorption , % ≥ 20.0 ≥ 20.0
Static normal hexane absorption, % ≥ 12.0 ≥ 12.0
Specific surface area,m2/g ≥ 120 ≥ 150
Compressive strength... |