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

Table 2

Compressive strength results of different fibre concretes.

Mix Id	W/C ratio	F/C ratio	Flyash %	Fibres %	Accelerator %	Average compressive strength (MPa)				% gain in 7-day	gain in 14-day	% gain in 56-day	Average spilt tensile strength (MPa); 28 days
						7 days	14 days	28 days	56 days	strength compared to 28-day	strength compared to 28-day	strength compared to 28-day
M1A1	0.3	0.6	25	0.5	1	41.5	48.7	51.3	52.7	81	95	97	3.61
M1A2	0.3	0.6	50	0.5	1	34.3	41.2	46.25	49.4	74	89	94	3.27
M1A3	0.3	0.6	25	1.5	1	46.5	52.1	53.4	54.1	87	98	99	3.58
M1A4	0.3	0.6	50	1.5	1	34.9	36.6	43.9	44.5	79	83	99	3.15
M2B1	0.3	0.8	25	0.5	1	43.1	44.7	47.1	47.8	97	97	97	3.36
M2B2	0.3	0.8	50	0.5	1	34.3	45.9	49.4	50.3	69	93	98	3.24
M2B3	0.3	0.8	25	1.5	1	50.7	52.8	54.9	55.1	92	96	100	3.6
M2B4	0.3	0.8	50	1.5	1	33.8	39.6	43.2	43.9	78	92	98	3.18
M3C1	0.4	0.6	25	0.5	1	37.5	42.4	46.8	47.2	80	91	99	3.21
M3C2	0.4	0.6	50	0.5	1	32.3	37.3	42.4	43.1	76	88	98	3.17
M3C3	0.4	0.6	25	1.5	1	33.6	38.9	44.6	45.4	75	87	98	3.28
M3C4	0.4	0.6	50	1.5	1	32.2	36.4	41.7	43.2	77	87	97	3.27
M4D1	0.4	0.8	25	0.5	1	36.7	41.2	46.8	48.1	78	88	97	3.24
M4D2	0.4	0.8	50	0.5	1	31.5	35.8	41.4	44.5	76	86	93	3.32
M4D3	0.4	0.8	25	1.5	1	32.6	36	42.4	44.1	77	85	96	3.17
M4D4	0.4	0.8	50	1.5	1	30.4	32.5	40.2	42.1	76	81	95	3.15