Performance of Coal Gangue-Based Cemented Backfill Material Modified by Water-Reducing Agents

Table 4

Performance indicators of CGCBM.

No.	Performance index of rheology				Bleeding rate	Cube compressive strength (MPa)
	Slump (cm)	Slump flow (cm)	(Pa)	(Pa·s)	/%	1 d	3 d	7 d	14 d	28 d
0	20	30	634.4	7.9	4.9	2	1.2	2.7	4.6	6.5
N1	22	33	563.6	2.3	1.3	0.4	1.5	3.0	5.0	8.3
N2	23	40	410.6	9.6	2.5	0.4	1.6	3.1	5.5	8.4
N3	23.5	43	301.6	12.1	4.0	0.5	2.0	3.2	6.4	9.3
N4	24	50	252.6	12.7	4.4	0.5	2.0	3.1	5.8	8.7
N5	27	62	244.5	12.4	6.4	0.6	2.0	3.1	5.7	8.0
J1	25	52	384.7	1.7	0	0.3	1.8	3.3	6.3	8.5
J2	25.5	66	319.3	5.9	0	0.4	2.2	3.6	7.2	8.7
J3	27	64	314.7	8.5	0.5	6	2.3	4.0	7.5	9.5
J4	27.5	43	216.9	17.6	1.1	0.8	2.5	4.1	7.5	9.2
J5	25.5	83	163.9	10.5	2.5	0.6	2.0	3.3	6.0	8.1