Effects of Different Ratios of Fly Ash and River Sand on Mechanical Properties of Cemented Paste Backfill Materials

Table 4

UCS of uniaxial compression test at different ages.

Groups	UCS of 7 days (MPa)	Average UCS of 7 days (MPa)	Groups	UCS of 14 days (MPa)	Average UCS of 14 days (MPa)	Groups	UCS of 28 days (MPa)	Average UCS of 28 days (MPa)
F0-1	6.72	6.17	F0-4	8.23	7.97	F0-7	9.16	8.85
F0-2	6.27		F0-5	8.45		F0-8	9.19
F0-3	5.52		F0-6	7.23		F0-9	8.21
F0.2-1	7.31	6.52	F0.2-4	10.54	10.96	F0.2-7	11.00	11.52
F0.2-2	6.94		F0.2-5	10.78		F0.2-8	11.63
F0.2-3	5.31		F0.2-6	11.56		F0.2-9	11.92
F0.4-1	7.64	6.97	F0.4-4	13.97	13.01	F0.4-7	15.14	14.76
F0.4-2	6.73		F0.4-5	12.94		F0.4-8	13.69
F0.4-3	6.54		F0.4-6	12.12		F0.4-9	15.46
F0.6-1	9.67	8.84	F0.6-4	12.35	13.20	F0.6-7	13.47	14.06
F0.6-2	8.46		F0.6-5	12.13		F0.6-8	12.86
F0.6-3	8.39		F06-6	15.12		F0.6-9	15.86