|Difference between OPC and PPC
||PPC Makes concrete more durable, than concrete made by any OPC 43, 53 Grade Cement.
||In any OPC, the water cement ratio is higher, no secondary reactions, and lesser finer than PPC. That’s the reason PPC will be more durable than concrete prepared by OPC
||More resistance towards the attack of alkalies, sulphates, chlorides, chemicals because of denser concrete.
||OPC is not suitable or not capable to resist the chemcicals attack on the concrete. Generally in costal areas, OPC is avoided because of salinity in the Earth, Atmosphere & water.
||PPC gives Better workability because of ball bearing effect of Puzzolonic material.
||The ball bearing effect is not possible in OPC
||Because of Puzzolona there is secondary reaction which is reacting with Hydrated lime and consumes it without allowing to come out of concrete. (called Leaching woozes out from Concrete as a waste)
||Since there is not secondary reaction the Hydrated Lime will come out of concrete creating small pores / Cracks which we cannot see through our naked eyes.
||Less Heat of Hydration (Good of concrete)
||More Heat of Hydration (Bad for Concrete)
||Cracks are reduced due to less heat of Hydration
||Cracks are increased due to More Heat of Hydration.
||Due to higher fineness the PPC gives us more cohesiveness and in turn gives more dense concrete.
||The finishing is moderate when compare to finishing made by PPC
||PPC needs less water cement ratio, due to which the concerete will become lesser permiable and in-turn makes concerete structure more durable
||Not as durable as PPC because Concrete made by OPC is not as denser as Concrete made by PPC. More Denser concrete make better durable concrete.
||The Volume of cement is high because of more fineness in PPC cement comperatively OPC
||Less fineness less volume.