Experimental Study and Application of Inorganic Solidified Foam Filling Material for Coal Mines

Table 9

Experimental design of water–cement ratio.

Sequence	Aggregate system			Water–cement ratio (%)	Foam		Gel slurry- foam ratio
	Cement (%)	SC (%)	Fly ash (%)		Foaming multiple	Dosage (mL)
1	48	32	20	25	10	200	1
2	48	32	20	35	10	200	1
3	48	32	20	45	10	200	1
4	48	32	20	55	10	200	1
5	48	32	20	65	10	200	1
6	48	32	20	75	10	200	1
7	48	32	20	85	10	200	1