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Chemical compositions of cement and fly ash.
| Composition (Mass % as Oxide) | Cement | Fly Ash (FA) |
|---|---|---|
| Calcium oxide (CaO) | 64.67 | 4.74 |
| Silica (SiO2) | 18.59 | 62.32 |
| Alumina (Al2O3) | 4.62 | 23.95 |
| Iron Oxide (Fe2O3) | 4.17 | 1.33 |
| Magnesium oxide (MgO) | 2.35 | 2.04 |
| Sulfer trioxide (SO3) | 3.32 | 1.25 |
| Potassium oxide (K2O) | 0.92 | 0.76 |
| Loss on ignition (LOI) | 1.03 | 3.12 |
