Database of CPB unconfined compressive strength Version 1.1

Database of CPB unconfined compressive strength Version 1.1

(maintained by Chongchong Qi and Qiusong Chen; Date of last update: 13/10/2018)

Introduction: This dataset provides the UCS results performed on eight 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., & Zhang, Q. (2018). A strength prediction model using artificial intelligence for recycling waste tailings as cemented paste backfill. Journal of Cleaner Production, 183, 566-578.

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 eight types of tailings are represented by T1 - T8. This dataset may contain some results from 'Database of CPB unconfined compressive strength Version 1' but the tailings labelling might be different.

Table 1. Physical and chemical characteristics of tailings.

Type	Gs	D10 (μm)	Cu	Cc	SiO₂ (%)	CaO (%)	Al₂O₃ (%)	MgO (%)	Fe₂O₃ (%)
T1	2.83	49.00	12.70	1.30	29.11	32.65	0.37	13.02	1.14
T2	2.91	19.00	6.57	0.91	56.18	2.44	6.53	3.43	10.45
T3	2.67	195.00	8.57	0.91	70.07	2.07	3.05	0.13	0.49
T4	2.79	302.00	4.65	0.94	46.85	10.54	14.14	1.00	3.31
T5	2.08	144.20	8.30	0.90	32.05	7.93	25.04	0.91	3.67
T6	2.83	192.00	10.54	2.04	45.11	18.89	13.46	0.53	1.42
T7	2.75	84.00	6.56	0.90	46.64	6.46	20.74	5.44	5.01
T8	2.61	83.00	27.43	0.87	72.50	0.37	9.56	0.63	3.13

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

Table 2. UCS results of CPB samples.

Tailings	No.	Cement:tailings ratio	Solid content (wt. %)	UCS (Mpa)
Tailings	No.	Cement:tailings ratio	Solid content (wt. %)	7 days	28 days
T1	1	1:4	76	2.41	6.85
	2	1:4	74	2.27	6.61
	3	1:4	72	2.10	4.91
	4	1:4	70	1.61	3.57
	5	1:6	74	1.45	2.36
	6	1:6	72	0.94	2.20
	7	1:6	70	0.87	1.77
	8	1:6	68	0.55	1.12
	9	1:8	74	1.05	1.76
	10	1:8	72	0.91	1.43
	11	1:8	70	0.52	1.13
	12	1:8	68	0.42	0.96
	13	1:10	74	0.67	1.20
	14	1:10	72	0.47	1.02
	15	1:10	70	0.37	0.71
	16	1:10	68	0.36	0.69
T2	1	1:4	65	0.29	1.00
	2	1:4	63	0.24	0.54
	3	1:4	61	0.22	0.50
	4	1:4	59	0.15	0.61
	5	1:6	65	0.21	0.54
	6	1:6	63	0.19	0.50
	7	1:6	61	0.14	0.50
	8	1:6	59	0.05	0.29
	9	1:8	65	0.09	0.37
	10	1:8	63	0.15	0.45
	11	1:8	61	0.11	0.37
	12	1:8	59	0.09	0.27
	13	1:10	65	0.16	0.50
	14	1:10	63	0.05	0.37
	15	1:10	61	0.04	0.20
	16	1:10	59	0.07	0.22
T3	1	1:4	76	1.65	3.67
	2	1:4	74	1.30	3.64
	3	1:4	70	1.18	2.89
	4	1:6	76	0.78	2.43
	5	1:6	74	0.73	2.28
	6	1:6	70	0.51	1.64
	7	1:8	76	0.50	1.59
	8	1:8	74	0.47	1.54
	9	1:8	70	0.42	1.48
	10	1:10	76	0.37	1.14
	11	1:10	74	0.35	0.84
	12	1:10	70	0.28	0.90
T4	1	1:4	80	1.78	2.73
	2	1:4	78	1.53	2.54
	3	1:4	75	1.24	2.34
	4	1:4	72	1.10	1.59
	5	1:6	80	0.75	1.33
	6	1:6	78	0.61	1.06
	7	1:6	75	0.47	0.68
	8	1:6	72	0.26	0.32
	9	1:8	80	0.38	0.85
	10	1:8	78	0.30	0.44
	11	1:8	75	0.24	0.36
	12	1:8	72	0.23	0.36
	13	1:10	80	0.20	0.21
	14	1:10	78	0.18	0.19
	15	1:10	75	0.14	0.16
	16	1:10	72	0.11	0.13
T5	1	1:8	75	0.23	1.18
	2	1:8	78	0.30	1.40
	3	1:8	80	0.55	1.84
	4	1:10	75	0.15	0.26
	5	1:10	78	0.20	0.35
	6	1:10	80	0.29	0.58
T6	1	1:6	76	0.85	1.78
	2	1:6	74	0.76	1.70
	3	1:6	72	0.54	1.51
	4	1:8	76	0.65	1.58
	5	1:8	74	0.55	1.23
	6	1:8	72	0.43	0.95
	7	1:10	76	0.48	1.05
	8	1:10	74	0.37	0.87
	9	1:10	72	0.31	0.68
T7	1	1:4	74	0.83	/
	2	1:4	72	0.67	/
	3	1:4	70	0.54	/
	4	1:6	74	0.36	/
	5	1:6	72	0.24	/
	6	1:6	71	0.20	/
	7	1:8	70	0.14	/
	8	1:8	72	0.22	/
	9	1:8	70	0.18	/
	10	1:10	68	0.16	/
	11	1:10	72	0.21	/
	12	1:10	70	0.13	/
T8	1	1:4	70	2.03	3.78
	2	1:4	72	2.36	4.13
	3	1:4	74	2.76	4.59
	4	1:4	76	3.24	5.01
	5	1:6	70	0.85	2.02
	6	1:6	72	1.12	2.17
	7	1:6	74	1.34	2.49
	8	1:6	76	1.53	2.87
	9	1:8	70	0.47	1.22
	10	1:8	72	0.56	1.31
	11	1:8	74	0.69	1.47
	12	1:8	76	0.78	1.64
	13	1:10	70	0.39	0.93
	14	1:10	72	0.42	0.95
	15	1:10	74	0.51	1.03
	16	1:10	76	0.67	1.10

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Database of CPB unconfined compressive strength Version 1.1