Civil Engineering - Concrete Technology - Discussion

The minimum period for curing concrete to attain maximum strength is 28 Days. From the above graph, it is clear that concrete attains 50% of its design strength when it cured for 3-7 Days. 75% of Compressive strength achieved in 14 days and 90% of strength by 28 days as time goes on the strength increase gradually.

1. Curing helps in strength gain and reduces shrinkage and cracking.
2. It also preserves strength, durability and all essential properties of concrete.
3. It prevents evaporation, which is essential for proper hydration.

So, all of the above is correct.

Curing is must for construction work because of various advantages mainly for strength workability and it remain the amount of moisture in concrete.

Actually, the crack is formed due to the heat of hydration in the structure (members) so this heat is reduced by curing.