Portland Grey Cement Type I Class 42.5R;
GREY PORTLAND CEMENT OPC 42,5N ACCORDING TO BRITISH STANDARDS 12/1996 AND/OR ASTM C-150 AND/OR EN-197/2000
CHEMICAL COMPOSITION
SILICON DIOXIDE (SIO2) 21%
ALUMINIUM OXIDE (A12O3) 5.30 %
FERRIC OXIDE (FE2O3) 3.30 %
CALCIUM OXIDE (CAO) 65.60 %
MAGNESIUM OXIDE (MGO) 1.10 %
SULPHUR TRIOXIDE (SO3) 2.70 %
LOSS OF IGNITION (LOI) 0.90 %
TRICALCIUM SILICATE (C3S) 60.00 %
DICALCIUM SILICATE (C2S) 15.00 %
TRICALCIUM ALUMINATE (C3A) 8.05 %
TRICALCIUM ALUMINO FERRICE (C4AF) 9.76 %
PHYSICAL TESTS
BLAINE 3.250 CM2/G
AUTOCLAVE EXPANTION (Le Chat) 0.02 Mm
INITIAL SETTING TIME (VICAT TEST) 105 MINUTES
FINAL SETTING TIME (VICAT TEST) 135 MINUTES
COMPRESSIVE STRENGTH @ 03 DAYS 230 KG/CM2 AND @ 07 DAYS 305 KG/CM2 AND @ 28 DAYS 420 KG/CM2