Table 1 Chemical compositions of Portland CEM II 42.5, silica fume and admixture.
Chemical composition | Cement | Silica‐fume | Characteristics | Superplasticizer |
|---|---|---|---|---|
(%) | (%) | |||
Silicon dioxide, SiO2 | 21 | 95 | Density | 1.07 |
Calcium oxide, CaO | 63 | 0.50 | Extrait sec | 30% |
Iron oxide, Fe2O3 | 3.2 | 1 | Aspect | Liquide |
Aluminium oxide, Al2O3 | 4.5 | 0.50 | Couleur | Brun clair |
Magnesium oxide, MgO | 1.3 | 1 | PH | 6–6,5 |
Potassium oxide, K2O | 0.4 | / | Teneur en chlore | 0.1 g/l |
Sulphur trioxide, SO3 | 2 | 0.5 | Dosage | 0,5 à 2,0% C |
Sodium oxide, Na2O | 0.05 | / | ||
Cl− | 0.008 | 0.01 | ||
CaO L | 0.9 | / |