1) Colour : Gryish White 2) Specific Gravity: 2.85 - 2.95 3) Glass Content: 95+3 { 85%(min)} 4) Fineness(m2/Kg) 450+20 (320) 5) Slag Activity Index a) 7 days : 70% (60%(min.) of Control OPC) b) 28 days: 90% (60%(min.) of Control OPC) 6) Soundness a) Le-Chatelier (mm) : 2.0 7) Proportion of use : 20% to 70%