The entrained air in concrete

After the curing of 28 days, the concrete gains strength upto (As per IS)

After 28 days concrete acquires

Maturity of concrete means

Harshness in concrete is due to the excess of

If 30 % excess water is added, the strength of concrete is reduced by

An aggregate having all the pores filled with water but having dry surface is called

In concrete walls, construction joints should be provided at the