Development of a New Type of Alkali-Free Liquid Accelerator for Wet Shotcrete in Coal Mine and Its Engineering Application

Table 3

Effects of mixing time on setting time under the same test conditions.

Accelerator mass content/%	Mixing time/s	Initial setting time/min	Final setting time/min	Test error/s
6	5	4.5	11.2	>15
	8	3.2	7.3	<10
	12	3.8	7.7	<10
	15	4.9	13.2	<5
	20	8.5	15.0	<5
	30	14.8	30.2	<5