Table 1 Chemical composition (% in mass) and specific gravity of starting materials.
From: Potential Use of Calcined Silt of Dam as a Pozzolan in Blended Portland Cement
Portland cement (PC) | Silica fume (SF) | Calcined silt (CS) | |
|---|---|---|---|
SiO2 (%) | 21.1 | 94.30 | 51.36 |
Al2O3 (%) | 4.2 | 0.69 | 12.78 |
Fe2O3 (%) | 5.32 | 0.14 | 5.18 |
CaO (%) | 61.8 | 1.17 | 17.08 |
MgO (%) | 2.3 | 0.29 | 2.29 |
SO3 (%) | 2.0 | 0.00 | 0.00 |
Na2O + K2O (%) | 0.6 | 1.67 | 2.42 |
LOI (%) | 2.28 | – | 7.06 |
[SiO2 + Al2O3 + Fe2O3] (%) | 30.62 | 95.13 | 69.32 |
∑ (%) | 99.64 | 98.26 | 98.17 |
Specific gravity | 3.1 | 2.71 | 2.38 |