Steel Fibre Reinforcing Characteristics on the Size Reduction of Fly Ash Based Concrete

Table 6

Toughness values for various mixture proportions of concrete.

Mix; Id	w/b; ratio	F/c; ratio	Fly ash; (%)	GSF; (%)	Acl; (%)	PCE; (%)	Depth of prism (mm)	Flexural strength at 7 days (MPa)	Flexural strength at 28 days (MPa)	Absolute toughness up to 3 mm; (N-m)	Post crack toughness up to 3 mm; (N-m)	Residual toughness up to 3 mm; (N-m)	Toughness index
MC1	0.3	0.6	0	0	0	1	100	4.28	5.63	0	0	0	0
MSF1	0.3	0.6	25	0.5	1	1	100	4.32	5.85	22.83	19.92	14.24	0.51
							95	4.10	5.57	21.04	18.23	13.30	0.35
							90	3.85	5.3	19.25	16.54	12.36	0.39
							85	3.50	4.85	17.46	14.85	11.42	0.41
MSF2	0.3	0.6	25	1.0	1	1	100	3.35	6.30	26.06	19.34	16.65	0.46
							95	4.25	5.74	25.89	18.40	15.89	0.48
							90	4.25	5.65	25.72	17.46	15.13	0.44
							85	3.75	5.3	25.55	16.52	14.37	0.43
MSF3	0.3	0.6	25	1.5	1	1	100	3.49	6.98	34.37	27.97	24.27	0.60
							95	4.50	6.45	33.41	26.75	23.80	0.54
							90	4.70	6.69	32.45	25.53	23.33	0.51
							85	4.30	5.95	31.49	24.31	22.86	0.49
MSF7	0.3	0.6	50	0.5	1	1	100	3.45	5.72	16.15	10.73	8.23	0.28
							95	3.75	5.05	15.78	9.45	7.45	0.29
							90	3.56	4.02	15.41	8.17	6.67	0.32
							85	3.20	3.65	15.04	6.89	5.89	0.25
MSF8	0.3	0.6	50	1.0	1	1	100	3.57	5.85	23.40	17.17	15.28	0.44
							95	3.98	5.65	22.50	16.58	14.32	0.34
							90	3.75	4.39	21.60	15.99	13.36	0.35
							85	3.41	3.12	20.70	15.40	12.40	0.31
MSF9	0.3	0.6	50	1.5	1	1	100	3.60	6.08	29.61	25.86	17.87	0.64
							95	4.39	6.08	28.34	24.30	16.45	0.45
							90	4.20	5.39	27.07	22.74	15.03	0.46
							85	4.14	5.25	25.80	21.18	13.61	0.29