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	BIS Specifications and SDCC norms of 43 GRADE OPC
	BIS Specifications and SDCC norms of 53 GRADE OPC
	Portland cement construction grade 42.5 n/r OPC
	Portland PC – CP CEM 1- 52.5 Cement

Portland PC – CP CEM 1- 52.5 Cement with early strength for concrete producers and pre-cast manufacturers BS EN 197-1
TYPICAL PROPERTIES
Surface area	(m2/kg)	290 – 420
Setting time – initial	Mins	80 – 200
EN 196-1 Mortar	-
	Compressive strength
	2 days	25 – 35
	7 days	40 – 50
	28 days	54 – 64
Apparent particles density	Kg/m3	3080 – 3180
Bulk density	Kg/m3
	Aerated	1000 – 1300
	Settled	1300 -1450
Colour	Y value	27.5 – 37.5
Sulphate	SO3	2.5 – 3.5
Chloride	Cl	<0.06
Alkali	Eq Na2O	0.4 – 0.75
Tricalcium Silicate	C3S	45.0 – 60.0
Dicalcium Silicate	C2S	12.0 – 25.0
Tricalcium Aluminate	C3A	7.0 – 12.0
Tetracalcium Aluminoferrite	C4AF	6.0 – 10.0