- BIS approved (IS 16714:2018, CM/L: 7100100067) - Specs: <5>380 Blaine fineness - Why GGBS (When compared with OPC/PPC): #1 This SCM is ~20% cost efficient #2 Enhances long term strength by ~25% #3 It is LEED certified green material #4 It enhances workability & Aesthetics #5 Excellent chemical resistance from Alkali-silica reaction, Sulphur attach, Chloride ingress, etc. #6 It reduces the Heat of Hydration #7 GGBS replaces OPC/PPC usage by 30%-60% #8 1 ton of GGBS used saves almost 1 ton of CO2 emission