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

Table 6

Effects of aluminum sulfate mass content on the setting time and strength of cement.

Content of Material A/%	Content of aluminum sulfate/%	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
35	18	120	195	8.1	40.5	92
45	23	98	174	8.4	38.1	87
55	28	81	159	9.6	35.8	82
65	33	79	152	9.8	34.2	78
75	39	77	147	9.3	32.0	73