The Effect of Accelerators and Mix Constituents on the High Early Strength Concrete Properties

Table 3

Compressive strength of control concrete mixtures for 7, 14, 28, and 56 days.

Mix Id	W/C ratio	F/C ratio	C/TA ratio	Average compressive strength (MPa)				% gain in 7-day strength compared to 28-day	% gain in 14-day strength compared to 28-day	% gain in 28-day strength compared to 56-day
					7 days	14 days	28 days	56 days
M1	0.3	0.6	0.26	35.4	37.5	41.5	42.8	99	95	94
M2	0.3	0.8	0.24	39.7	40.1	42.3	45.2	94	90	97
M3	0.4	0.6	0.26	31.2	32.4	36.7	39.5	96	88	93
M4	0.4	0.8	0.24	33.4	36.1	40.1	41.9	93	90	96