Key Technology Research on the Rapid-Molding In-Closed Retaining-Wall in Filling Mining

Table 1

Admixture test results.

No.	Admixture	Test result
		30 min	3 h	12 h or more
1	Calcium chloride	Noninitial set	Noninitial set	Initial set, nonstrength, bleeding, nonexpanded
2	Bentonite	Noninitial set	Noninitial set	Initial set, nonstrength, bleeding, nonexpanded
3	Bentonite, urea	Initial set	Nonfinal set	Final set, intensity contrast, bleeding, poor expansion
4	Calcium sulphoaluminate, sodium sulfate	Noninitial set	Initial set	Final set, low strength, bleeding, nonexpanded
5	Liquid sodium silicate	Initial set	Final set	Final set, medium strength, nonbleeding, microdilatancy
6	Alum, liquid sodium silicate	Initial set	Final set	Final set, great strength, nonbleeding, microdilatancy