Research Article
Preparation and Performance of a New-Type Alkali-Free Liquid Accelerator for Shotcrete
Table 4
The adaption of accelerator to water reducing agent.
| Type of water reducing agent | Content of water reducing agent/% | Water cement ratio | Initial setting time | Final setting time |
| Cement paste without water reducing agent | 0 | 0.4 | 3 min | 6 min 50 s | Naphthalene water reducing agent | 0.8 | 0.4 | 3 min 50 s | 7 min 48 s | 0.35 | 2 min 50 s | 6 min 30 s | Polycarboxylic acid water reducing agent | 0.75 | 0.4 | 4 min 10 s | 8 min 5 s | 0.35 | 2 min 38 s | 6 min 10 s |
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