Constituents [wt. %] | Uncalcined clay | Calcined clay [850˚C] | ||
Nsu | Ihitte-Uboma | Nsu | Ihitte-Uboma | |
SiO2 | 57.52 | 63.09 | 62.87 | 64.88 |
Al2O3 | 25.29 | 20.90 | 28.75 | 24.82 |
TiO2 | 0.85 | 0.60 | 2.10 | 1.48 |
K2O | 0.49 | 1.04 | 0.50 | 0.44 |
Na2O | 0.30 | 0.36 | 0.32 | 0.22 |
CaO | 0.25 | 0.28 | 0.27 | 0.22 |
V2O5 | 0.23 | 0.26 | 0.24 | 0.22 |
Fe2O3 | 0.11 | 0.11 | 0.28 | 0.27 |
Cr2O3 | 0.08 | 0.08 | 0.09 | 0.08 |
CuO | 0.02 | 0.02 | 0.2 | 0.02 |
MnO | 0.02 | 0.03 | 0.2 | 0.02 |
SO3 | - | 0.03 | 0.10 | 0.08 |
Se2O3 | 0.003 | - | 0.001 | 0.001 |
L.O.I | 14.83 | 12.90 | 4.63 | 6.69 |
Total | 99.99 | 100.06 | 100.35 | 99.44 |