Database of CPB unconfined compressive strength Version 1

Database of CPB unconfined compressive strength Version 1

(maintained by Chongchong Qi and Qiusong Chen; Date of last update: 13/09/2018)

Introduction: This dataset provides the UCS results performed on three types of tailings. In order that this dataset can be used by the readers, all available information about tailings, experimental design, etc is also provided. Non-commercial reuse of this dataset is unlimited with retention of copyright notice for the authors and the following published paper:

Qi, C., Fourie, A., & Chen, Q. (2018). Neural network and particle swarm optimization for predicting the unconfined compressive strength of cemented paste backfill. Construction and Building Materials, 159, 473-478.

The authors also note that this dataset is of historical interest only as it will be progressively updated when new experimental data is available. Always double-check whether this is a updated one before its utilisation. The three types of tailings are represented by T1, T2 and T3 in this dataset.

Table 1. The physical characteristics of tailings.

Tailings	Gs	D10 um	D50 um	Cu	Cc
T1	2.91	4.10	19.41	6.57	0.91
T2	2.88	2.00	32.00	23.50	1.29
T3	2.61	4.60	82.85	27.43	0.87

(Note: Gs: Specific gravity; Cu: Coefficient of uniformity; Cc: Coefficient of curvature)

Table 2. The main chemical characteristics of tailings.

Tailings	Fe₂O₃	Al₂O₃	SiO₂	CaO	MgO
T1	10.45	6.53	56.18	2.44	3.43
T2	7.45	5.52	42.73	24.87	1.26
T3	3.13	9.56	72.50	0.37	0.63

Table 3. UCS results of CPB samples.

Tailings	No.	Cement: tailings ratio	Solid content (wt. %)	UCS (MPa)
Tailings	No.	Cement: tailings ratio	Solid content (wt. %)	3 days	7 days	28 days
T1	1	1:4	65	0.08	0.29	1.00
	2	1:4	63	0.09	0.24	0.54
	3	1:4	61	0.07	0.22	0.50
	4	1:4	59	0.02	0.15	0.61
	5	1:6	65	0.02	0.21	0.54
	6	1:6	63	0.10	0.19	0.50
	7	1:6	61	0.04	0.14	0.50
	8	1:6	59	0.02	0.05	0.29
	9	1:8	65	0.03	0.09	0.37
	10	1:8	63	0.04	0.15	0.45
	11	1:8	61	0.02	0.11	0.37
	12	1:8	59	0.01	0.09	0.27
T2	1	1:4	76	2.37	2.90	5.42
	2	1:4	74	1.48	2.19	3.80
	3	1:4	72	1.14	1.60	2.62
	4	1:4	70	0.88	1.32	2.06
	5	1:6	76	1.05	1.44	2.33
	6	1:6	74	0.78	1.20	1.96
	7	1:6	72	0.56	0.88	1.44
	8	1:6	70	0.49	0.73	1.23
	9	1:8	76	0.70	1.11	1.87
	10	1:8	74	0.51	0.74	1.24
	11	1:8	72	0.33	0.42	1.03
	12	1:8	70	0.26	0.35	0.69
	13	1:10	76	0.47	0.51	1.17
	14	1:10	74	0.38	0.47	0.88
	15	1:10	72	0.29	0.36	0.77
	16	1:10	70	0.21	0.31	0.60
T3	1	1:4	76	1.95	3.24	5.01
	2	1:4	74	1.51	2.76	4.59
	3	1:4	72	1.37	2.36	4.13
	4	1:4	70	1.19	2.03	3.78
	5	1:6	76	1.23	1.53	2.87
	6	1:6	74	0.85	1.34	2.49
	7	1:6	72	0.67	1.12	2.17
	8	1:6	70	0.54	0.85	2.02
	9	1:8	76	0.79	0.78	1.64
	10	1:8	74	0.66	0.69	1.47
	11	1:8	72	0.43	0.56	1.31
	12	1:8	70	0.37	0.47	1.22
	13	1:10	76	0.51	0.67	1.10
	14	1:10	74	0.41	0.51	1.03
	15	1:10	72	0.37	0.42	0.95
	16	1:10	70	0.32	0.39	0.93

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Database of CPB unconfined compressive strength Version 1