Research Article
Development of a New Type of Alkali-Free Liquid Accelerator for Wet Shotcrete in Coal Mine and Its Engineering Application
Table 10
Range analysis of the main components in mother liquor.
| | Determination items | A | B | C | Factors sorting and optimal group |
| | Setting time | | | | | | Initial setting time/s | | | | | | Mean value 1 | 241.7 | 243.3 | 230.0 | Factors sorting: BAC
Optimal group: A2B2C3 | | Mean value 2 | 220.0 | 213.3 | 240.0 | | Mean value 3 | 235.0 | 240.0 | 226.7 | | Range | 21.7 | 30 | 13.3 | | Final setting time/s | | | | | | Mean value 1 | 566.7 | 570.0 | 558.3 | Factors sorting: BAC
Optimal group: A2B2C3 | | Mean value 2 | 530.0 | 516.7 | 550.0 | | Mean value 3 | 555.0 | 565.0 | 543.3 | | Range | 36.7 | 53.3 | 15.0 | | Compressive strength | | | | | | Compressive strength of one day/MPa | | | | | | Mean value 1 | 12.5 | 11.0 | 11.1 | Factors sorting: ABC
Optimal group: A1B2C3 | | Mean value 2 | 11.6 | 11.6 | 11.2 | | Mean value 3 | 9.5 | 11.1 | 11.3 | | Range | 3.0 | 0.6 | 0.2 | | Compressive strength of 28 days/MPa | | | | | | Mean value 1 | 44.8 | 42.1 | 42.6 | Factors sorting: ABC
Optimal group: A1B3C3 | | Mean value 2 | 42.6 | 42.8 | 43.1 | | Mean value 3 | 41.5 | 44.1 | 43.2 | | Range | 3.3 | 2.0 | 0.6 |
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