SpecificationsPortland cement Chemical PropertiesOur DeclerationStandardUnitSiO2 19,57 %Fe2O3 3,63 %Al2o3 5,24 %CaO 61,92 %MgO 1,15 %SO3 2,69 %Loss On Ignition 3,10 %Insoluble Residue 0,32 %Free Lime 0,71 %Alkali Equivalent (Na2O type) 0,67 %Total Addivite ..