Research Article
Flexural Toughness of Steel Fiber Reinforced High Performance Concrete Containing Nano-SiO2 and Fly Ash
Table 2
Physical properties of nano-SiO2.
| | Average particle size (nm) | SiO2 content (%) | Specific surface area (m2/g) | Apparent density (g/cm3) | pH value |
| | 30 | 99.5 | 200 ± 10 | 0.055 | 5–7 |
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