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

Table 3

Materials proportioning of the orthogonal test.

Number	Raw materials
	FGD gypsum (g)	GBFS (g)	Carbide slag (g)	Fly ash (g)	Sodium hydroxide (g)	Water-reducing admixture (g)
1	7	24	12	100	7.5	0.5
2	7	26	14	100	7.8	0.5
3	7	28	16	100	7.9	0.5
4	7	30	18	100	8.2	0.5
5	7	32	20	100	8.4	0.5
6	9	24	14	100	7.7	0.5
7	9	26	16	100	7.9	0.5
8	9	28	18	100	8.2	0.5
9	9	30	20	100	8.4	0.5
10	9	32	12	100	8.1	0.5
11	11	24	16	100	7.9	0.5
12	11	26	18	100	8.2	0.5
13	11	28	20	100	8.4	0.5
14	11	30	12	100	8.1	0.5
15	11	32	14	100	8.3	0.5
16	13	24	18	100	8.2	0.5
17	13	26	20	100	8.4	0.5
18	13	28	12	100	8.1	0.5
19	13	30	14	100	8.3	0.5
20	13	32	16	100	8.5	0.5
21	15	24	20	100	8.4	0.5
22	15	26	12	100	8.1	0.5
23	15	28	14	100	8.3	0.5
24	15	30	16	100	8.5	0.5
25	15	32	18	100	9.2	0.5