Assertion (A): Pozzolana is added to cement to increase early strength.
Reason (R): It reduces the heat of hydration.
• Pozzolana has no cementing value itself but has property of combining with lime to produce a stable lime
pozzolana compound which has definite cementitious properties.
• Free lime is thus removed and resistance to chemical attack increase. It has low heat evolution, used inPreparing students for success in a changing World.
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