Research Article
Fire Resistance of Sewage Sludge Ash Blended Cement Pastes
Table 2
Chemical composition of OPC and sewage sludge ash, wt%.
| | Material | Oxide, wt% | | SiO2 | Al2O3 | Fe2O3 | CaO | MgO | SO3 | Na2O | K2O | LOI* | P2O5 | Not
determined | Total |
| | OPC | 20.88 | 6.08 | 3.18 | 63.00 | 1.50 | 1.60 | 0.22 | 0.24 | 1.35 | 0.15 | 1.80 | 98.20 | | Sewage sludge ash | 53.90 | 9.13 | 8.05 | 6.80 | 3.93 | 6.04 | 1.43 | 1.62 | 1.11 | 7.12 | 0.74 | 99.26 |
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LOI is the loss on ignition.
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