Research Article
Influence of Mass Concentration on Microstructure and Pore Structure of Coal-Gangue-Based Green Cemented Filling Body
| Setting time | Flexural strength (MPa) | Compressive strength (MPa) | Specific surface area (m2/kg) | Fineness (%) | Burning loss (%) | MgO (%) | SO3 (%) | Initial | Final | 3 d | 28 d | 3 d | 28 d |
| 160 | 250 | 4.5 | 7.9 | 26.3 | 42.5 | 347 | 3.6 | 2.8 | 2.3 | 2.5 |
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