Abstract
The paper presents a detailed study of early age compressive stress-strain responses of low- (30 MPa), medium (70 MPa) and high strength (100 MPa) concretes. In particular, the stress-strain responses during the first 72 hr after casting are closely followed. Tests were carried out on 100 x 200-mm (4x8-in.) concrete cylinders. The influence of concrete strength on temperature rise due to temperature-matched curing is presented. The effect of three different curing conditions ont he development of concrete compressive strength and elastic moduli is described : 1) temperature-matched, 2) sealed, and 3) air-dried curing.
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