Research Article
Effects of Corn Stalk Fly Ash (CSFA) on the Mechanical and Deformation Properties of Cemented Coal Gangue Backfill
Table 1
Main chemical composition and physical properties of various solid raw materials.
| | | Coal gangue | Cement | Fly ash | CSFA |
| | SiO2 | 28.46% | 22.27% | 52.42% | 35.68% | | Al2O3 | 12.11% | 5.59% | 32.48% | 6.10% | | Fe2O3 | 14.86% | 3.47% | 3.62% | 7.40% | | CaO | 7.15% | 65.90% | 3.05% | 9.98% | | MgO | 3.50% | 0.81% | 1.01% | 2.60% | | True density (g/cm3) | 2.31 | 3.10 | 2.09 | 2.13 | | Specific surface (m2/kg) | — | 349 | 415 | 222 | | Moisture content (%) | 8.0 | — | 0.12 | 3.77 |
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