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

Table 2

Levels and factors of the orthogonal test.

Levels	Factors
	FGD gypsum (g) (A)	GBFS (g) (B)	Carbide slag (g) (C)
1	7	24	12
2	9	26	14
3	11	28	16
4	13	30	18
5	15	32	20