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GREY PORTLAND CEMENT FOR CONSTRUCTION GRADE 42.5
ACCORDING TO THE BRITISH STANDARD 12/1996 OR ASTM C-150
 

CHEMICAL COMPOSITION:
 

SILICON DIOXYDE                            : (SI 02) 21.00

ALUMINUIM OXYDE               : (A1203) 5.30

FERRICOXIDE                         : (FE203) 3.30

CALCUIM OXYDE                                : (CAO) 65.60

MAGNESIUM OXYDE (MGO)  : 1.10

SULPHUR TRIOXYDE (SO3) : 2.70

LISS OF IGNITION (LOI)                  : 0.90

TRI CALCIUM SILICATE (C3S)          : 60.00

DICALCIUM SILICATE (C2S) : 15.00

TRI CALCIUM ALUMINATE (C3A)                  : 8.05

TRI CALCIUM ALUMINO FERRICE (C4AF)    : 9.76

PHYSICAL AND MECHANICAL PROPERTIES:
 

BLAIN                                    : CM2/GR 3.250

AUTOCLAVE EXPANSION        : 0.02

INITAIL SETTING TIME           : (VIC AT) 105 MINUTES

FINAL SETTING TIME             : (VIC AT) 135 MINUTES

COMPRESSIVE STRENGTH     : @ 03 DAYS 230
                                            KG/CM2 AND @ 07 DAYS

                                              305 KG/CM2 AND
                                            @ 28 DAYS 420 KG/CM2