An Experimental Investigation on the Mechanical Properties of Gangue Concrete as a Roadside Support Body Material for Backfilling Gob-Side Entry Retaining

Table 2

Sample gangue concrete ratios (mass ratios).

No.	Gangue content (%)	Water-cement ratio	Water content (%)	Cement content (%)	Age (day)
1	50	0.40	14.29	35.71	7, 14, 28
2		0.43	15.03	34.97	7, 14, 28
3		0.46	15.75	34.25	7, 14, 28
4		0.50	16.67	33.33	7, 14, 28
5		0.55	17.74	32.26	7, 14, 28
6		0.60	18.75	31.25	7, 14, 28
7	0	0.40	14.29	35.71	7, 14, 28
8		0.43	15.03	34.97	7, 14, 28
9		0.46	15.75	34.25	7, 14, 28
10		0.50	16.67	33.33	7, 14, 28
11		0.55	17.74	32.26	7, 14, 28
12		0.60	18.75	31.25	7, 14, 28
13	45	0.4	14.29	35.71	7, 14, 28
14	55		14.29	35.71	7, 14, 28
15	60		14.29	35.71	7, 14, 28