Research Article
Measurement of Pozzolanic Activity Index of Scoria, Pumice, and Rice Husk Ash as Potential Supplementary Cementitious Materials for Portland Cement
Table 1
Chemical compositions of scoria, pumice, and RHA from different literatures.
| Sample | SiO2 %] | Fe2O3 %] | Al2O3 %] | CaO %] | Alkali %] | MgO %] | TiO2 %] | L.o.I %] |
| Scoria data from different literature |
| Khandaker and Hossain [8] | 45–50 | 7–10 | 13–15 | 5–8 | 4–6 | 4–6 | | 1.25–1.5 | Taha et al. [15], Yemen scoria | 47–50 | 28–30 | 7–10 | 3–6 | | | | Taha et al. [15], Italy scoria | 51.4 | 25.7 | 6.5 | 6.4 | | | | Njau et al. [16] | 35.4 | 31.9 | 12.7 | 5.6 | | | |
| Pumice data from literature |
| Ismail et al. [17] | 70.97 | 1.88 | 14.24 | 1.37 | 8.48 | 0.35 | 0.14 | 2.41 |
| RHA data from different literature |
| Wansom et al. [6] | 93.59 | 0.31 | 0.89 | 2.28 | 1.30 | | 0.61 | | Della et al. [12] (at 700°C) | 94.95 | 0.26 | 0.39 | 0.54 | 1.19 | 0.9 | 0.2 | 0.85 |
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