Advances in Materials Science and Engineering / 2015 / Article / Tab 16

Research Article

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

Table 16

Testing results of compressive strength about sprayed concrete.

AcceleratorCompressive strength of 28 days/MPaAverage strength/MPaCompressive strength ratio of 28 days/%

Without adding accelerator38.2
39.9
37.7
38.0
35.8
37.7
37.9100

WT-1 type accelerator35.8
32.0
31.2
34.9
36.1
32.9
33.889.2

GOR-I type accelerator26.7
30.1
27.4
28.8
26.5
27.5
27.873.5

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