Table 1.
Chemical composition of each fly ash as determined by X-ray fluorescence (XRF).
| Fly Ash Batches | CFA1 | CFA2 | CFA3 |
|---|---|---|---|
| Component | wt.% | wt.% | wt.% |
| SiO2 | 58.600 | 58.491 | 57.360 |
| Al2O3 | 20.202 | 21.046 | 22.106 |
| Fe2O3 | 9.245 | 8.286 | 8.126 |
| CaO | 4.670 | 3.843 | 4.701 |
| K2O | 3.023 | 3.938 | 3.090 |
| TiO2 | 2.341 | 2.232 | 2.445 |
| SO3 | 1.040 | 1.282 | 1.098 |
| SrO | 0.339 | 0.340 | 0.489 |
| ZrO2 | 0.295 | 0.226 | 0.263 |
| MnO | 0.165 | 0.158 | 0.189 |
| Rb2O | 0.044 | 0.045 | 0.053 |
| Y2O3 | 0.038 | 0.032 | 0.043 |
| Loss of Ignition (AS 3583.3-1991 [22] | 0.97 | 1.6 | 0.91 |
| SiO2/Al2O3(wt) | 2.90 | 2.78 | 2.59 |