Orthogonal Experimental Studies on Preparation of Mine-Filling Materials from Carbide Slag, Granulated Blast-Furnace Slag, Fly Ash, and Flue-Gas Desulphurisation Gypsum

Table 4

Results of the orthogonal test.

Number	Water required for standard consistency (mL)	Consistency (mm)	Slump (mm)	Setting time (min)		7 d strength (MPa)		28 d strength (MPa)
				Initial time	Final time	Compressive strength	Flexural strength	Compressive strength	Flexural strength
1	141	14	212	287	397	1.72	0.61	3.79	1.35
2	137	13	143	298	387	1.81	0.65	3.40	1.05
3	128	14	129	265	389	2.48	0.95	3.67	1.12
4	132	13	144	267	364	1.78	0.64	3.23	0.98
5	135	14	165	279	397	2.14	0.80	3.36	1.33
6	126	14	138	259	367	2.22	0.84	3.20	1.30
7	143	13	174	246	387	1.94	0.79	2.92	1.29
8	136	14	158	275	376	2.32	0.92	3.84	1.44
9	134	15	149	289	359	2.37	0.93	3.46	1.23
10	137	14	190	273	378	2.43	0.93	3.39	1.24
11	127	11	147	256	367	1.89	0.77	3.35	1.17
12	147	12	211	265	387	1.90	0.78	3.13	1.14
13	132	15	157	286	398	1.84	0.75	3.14	1.26
14	123	14	138	265	369	1.81	0.72	3.56	1.24
15	128	14	139	254	378	2.22	0.83	3.37	1.03
16	131	12	210	247	367	1.82	0.66	3.49	1.33
17	138	14	200	267	373	2.29	0.90	4.07	1.40
18	121	13	129	256	357	1.80	0.66	3.56	1.10
19	127	13	146	243	363	1.50	0.66	3.40	0.98
20	130	13	178	287	356	2.15	0.80	4.05	1.47
21	145	13	191	267	364	1.63	0.57	3.58	1.16
22	138	9	159	253	352	1.63	0.56	3.47	1.15
23	146	8	148	256	358	1.71	0.61	3.94	1.40
24	141	9	149	278	398	1.81	0.66	3.47	1.15
25	142	7	138	298	378	1.77	0.70	3.72	1.22