Mechanical Properties of Energy Efficient Concretes Made with Binary, Ternary, and Quaternary Cementitious Blends of Fly Ash, Blast Furnace Slag, and Silica Fume

International Journal of Concrete Structures and Materials

Table 6 Compressive strength test results.

Specimen name		Water-binder (W/B) ratio (%)	Compressive strength (Unit: MPa)				Ratio of compressive strength at 7 days to strength at 28, 56 and 91 days
Specimen name		Water-binder (W/B) ratio (%)	7 days	28 days	56 days	91 days	7/28	7/56	7/91
Group I	FA15	40	35.2	44.6	52.2	55.6	0.79	0.67	0.63
	FA25		31.1	41.2	45.3	48.8	0.75	0.69	0.64
	SF5		53.0	63.9	71.5	71.9	0.83	0.74	0.74
	BS25 + FA25		23.0	42.9	53.9	60.2	0.54	0.43	0.38
	BS30 + FA30		15.8	36.3	41.7	51.0	0.44	0.38	0.31
	BS50		25.8	48.9	57.5	67.1	0.53	0.45	0.38
	BS65 + SF5		19.4	40.4	50.2	56.4	0.48	0.39	0.34
Group II	FA25	34	41.0	50.4	53.3	63.6	0.81	0.77	0.64
	SF5		64.5	72.8	84.6	86.1	0.89	0.76	0.75
	BS25 + FA25		29.5	53.5	65.3	70.4	0.55	0.45	0.42
	BS30 + FA30		21.1	45.8	56.3	60.9	0.46	0.37	0.35
	BS50		29.8	53.4	65.7	69.3	0.56	0.45	0.43
	BS65 + SF5		26.2	55.7	68.4	69.3	0.47	0.38	0.38
Group III	FA25 + SF5	28	53.6	73.2	77.7	80.6	0.73	0.69	0.67
	SF5		73.6	83.6	90.9	93.2	0.88	0.81	0.81
	BS25 + FA20 + SF5		43.2	73.7	83.9	88.3	0.59	0.51	0.49
	BS30 + FA25 + SF5		29.6	57.4	63.7	73.0	0.52	0.46	0.41
	BS45 + SF5		46.3	76.5	85.0	89.4	0.61	0.54	0.52
	BS65 + SF5		37.4	72.5	80.6	81.6	0.52	0.46	0.46