Table 3: Compressive strength of control concrete mixtures for 7, 14, 28, and 56 days.

Mix IdW/C ratioF/C ratioC/TA ratioAverage 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 days14 days28 days56 days

M1 0.3 0.6 0.2635.437.541.542.8999594
M2 0.3 0.8 0.2439.740.142.345.2949097
M3 0.4 0.6 0.2631.232.436.739.5968893
M4 0.4 0.8 0.2433.436.140.141.9939096