PREDICTION OF COMPRESSIVE STRENGTH OF CONCRETE BY ACCELERATING CURING METHOD

Conventionally, strength of concrete in construction work is estimated in terms of its 28 days compressive strength of cubes. This procedure involves 28 days of wet curing before testing as per IS: 516 – 1959 (2). This time interval may be considered as a long period. Hence, essentials for an accelerated curing technique have arisen, where 28 days strength of concrete can be easily predicted. The main objective of this paper is to develop mathematical model, which gives relation between warm water accelerated curing strength and normal curing strength for 28 day compressive strength. Warm water curing at 55 ± 2° C is applied to accelerate the strength gain of concrete for early prediction of 28 day compressive strength. Various cement grades OPC43 and OPC53 with different Concrete mixes in terms of water-cement ratio and aggregate –cement ratio was considered to prepared cubes.