Table 4 Chemical analysis results of silica fume
From: Combined Use of Sewage Sludge Ash and Silica Fume in Concrete
Element | Content (%) | Element | Content (%) |
|---|---|---|---|
Na2O (sodium oxide) | – | SiO2 (silicon dioxide) | 86.18 |
K2O (potassium oxide) | – | Al2O3 (aluminum oxide) | 1.44 |
TiO2 (titanium dioxide) | – | Fe2O3 (ferric oxide) | 0.2 |
P2O5 (phosphorus pentoxide) | – | CaO (calcium oxide) | 3.06 |
ZnO (zinc oxide) | – | MgO (magnesium oxide) | 1.32 |
Mn2O3 (manganic oxide) | – | SO3 (sulfur trioxide) | 0.337 |
Sulfide sulfur | – | Loss on ignition | 1.15 |