Properties and Engineering Applications of a New Goaf Grouting Filling Material

Table 4

Cement slurry-sodium silicate (C-S) volume ratio.

No.	Slurry volume ratio
	Water-cement ratio	:
1	1.0 : 1.0	1.0 : 1.0
2		1.0 : 0.6
3		1.0 : 0.4
4		1.0 : 0.2

Note: The water-cement ratio is the mass ratio of water to cement powder;  :  is the volume ratio of pure cement grout to pure sodium silicate.