Research Article
Development of a New Type of Alkali-Free Liquid Accelerator for Wet Shotcrete in Coal Mine and Its Engineering Application
Table 15
Rebound rate of shotcrete.
| | Accelerator | Position | Rebound rate/% | Average rebound rate/% |
| | Without adding accelerator | Arch
Two sides | 26.2
15.5 | 20.9 |
| | WT-1 type accelerator | Arch
Two sides | 13.3
9.4 | 11.4 |
| | GOR-I type accelerator | Arch
Two sides | 21.3
12.2 | 16.8 |
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