Research Article
Evaluation of Rheological Parameters of Slag-Based Paste Backfill with Superplasticizer
Table 1
Main physical and chemical properties of tailings, OPC, and slag.
| Chemical composition (wt.%) | Tailings | OPC | Slag | Physical properties | Tailings | OPC | Slag |
| CaO | 2.98 | 62.34 | 40.01 | Specific gravity | 2.68 | 3.3 | 2.90 | Fe2O3 | 1.72 | 5.06 | 0.38 | Specific surface (cm2/g) | 3470 | 5808 | 6198 | SiO2 | 62.5 | 21.43 | 33.80 | −20 μm content (%) | 42.9 | 66.3 | 70.1 | Al2O3 | 16.2 | 4.25 | 15.71 | Cu | 25.75 | 3.29 | 3.38 | MgO | 0.52 | 2.61 | 6.90 | Cc | 0.50 | 1.25 | 1.10 | Na2O | 3.07 | 0.41 | 0.05 | Pozzolanic strength index (%) | K2O | 8.11 | 0.73 | 0.44 | 7 days | N/A | N/A | 69.6 | SO3 | 0.45 | 1.48 | 0.18 | 28 days | N/A | N/A | 90.4 |
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