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Physical and chemical properties of silica fume.
| Color and Form | Main Active Component | Density (g/cm3) | SiO2 (%) | Specific Surface (m2/g) | Primary Graining (μm) | Maximum Consumption (% of cement weight) |
|---|---|---|---|---|---|---|
| Gray powder | Amorphous SiO2 | 2.2 | 96 ± 1.5 | 20.5 | 0.1–0.3 | 11 |
