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

Table 8

Experimental results of combination of Materials A and C.

Content of Material A/%	Content of Material C/%	Initial setting time/min	Final setting time/min	Compressive strength of one day/MPa	Compressive strength of 28 days/MPa	Compressive strength ratio of 28 days/%
0	0	195	258	7.8	43.9	100
55	0	90	162	9.1	37.8	86
	1	69	124	9.7	39.9	91
	1.5	59	104	10.3	41.5	95
	2	48	86	11.2	42.3	96
	2.5	41	80	11.1	42.8	97
	3	47	85	10.8	43.1	98