Research Article
The Potential to Replace Cement with Nano-Calcium Carbonate and Natural Pozzolans in Cemented Mine Backfill
Table 2
Chemical composition of Portland cement and supplementary cementitious materials (wt.%).
| | Material | CaO | Al2O3 | SiO2 | MgO | Fe2O3 | TiO2 | Na2O | K2O | SO3 |
| | Portland cement | 61.14 | 4.6 | 19.38 | 3.35 | 2.02 | — | 2.03 | 0.71 | 2.28 | | Pumice | 0.8 | 13.5 | 76.2 | 0.05 | 1.1 | 0.2 | 1.6 | 1.8 | — | | Zeolite | 5.6 | 3.5 | 70.3 | — | 3.05 | — | 4.7 | 3.8 | 0.03 | | Fly ash | 5.02 | 20 | 41.22 | 1.4 | 23.84 | — | 0.81 | 1.5 | 1.94 |
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