Ground granulated blast furnace slag 1. Fineness (m2 /kg): 370. 2. Soundness le-chatelier expansion (mm) : nil. 3. Initial setting time (min) Not less than opc:220. 4. Insoluble residue(%):0.05 5. Magnesia content (%):9.5 6.Sulphide sulphar(%):0.60 7. Sulphite content (%):0.10 8. Loss on ignition (%):0.30 9. Manganese content (%):0.06 10. Chloride content(%):0.003 11. Moisture content(%):0.005 12. Glass content(%):94 13. Compressive strength (n/mm2): After 7 days34.0 After 28 days53.0 14. Chemical moduli A). Cao + mgo + sio2 :84.0 B). Cao + mgo /sio2 :1.30 C). Cao/sio2 :1.05. Tonnes packed in i tonne or i.5 jumbo bags.