A Novel Prediction Model of Strength of Paste Backfill Prepared from Waste-Unclassified Tailings

Table 4

Proportions of materials and strength results.

No.	Binder (t/m^3)	Curing time (days)	Packing density	W/C	B/(T + S)	Observed UCS (MPa)	Calculated UCS (MPa)	Error (%)
1	0.28	7	0.703	2.450	0.167	1.676	1.759	−4.94
2	0.25	7	0.689	2.250	0.125	2.235	2.249	−0.60
3	0.15	7	0.654	3.463	0.100	0.763	0.727	4.66
4	0.28	14	0.703	2.450	0.167	2.289	2.385	−4.21
5	0.25	14	0.689	2.250	0.125	3.009	3.049	−1.34
6	0.15	14	0.654	3.463	0.100	1.021	0.987	3.37
7	0.28	28	0.703	2.450	0.167	2.959	3.012	−1.78
8	0.25	28	0.689	2.250	0.125	3.901	3.850	1.30
9	0.15	28	0.654	3.463	0.100	1.309	1.246	4.83