Strength of cement

For ordinary Portland cement.opc compressive strength is ranging between 33 -55 mpa at 28 days 2227 mpa at 7 day and 16 - 27 mpa at 3 days of curing after casting. 

Ppc standard straight of Portland puzolana cement ppc( ppc stand for Portland pozolana cement. Pozozoana cement ppc is manufactured by combination of puzzolanic material.pozzalana is an artificial or natural materials.which has slica in it . In a reactive from 

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