Free-flow property for water-proof material and powders
Physical & Chemical Data
| Properties | Unit | Typical Value | Testing Standard |
| Specific surface area(BET) | m2/g | 100±20 | GB/T 20020 |
| pH value in 4% dispersion （H2O：Ethanol=1:1） | – | 5.5～7.5 | GB/T 20020 |
| Loss on drying(2 hours at 105℃) | % | ≤1.5 | GB/T 20020 |
| Loss on ignition(2 hours at 1000℃ based on material dried for 2 hours at 105℃) | % | ≤10 | GB/T 20020 |
| Silica Content(Based on ignited material) | % | ≥99.8 | GB/T 20020 |
| Tamped Density（Based on material dried at 105℃ for 2 hours） | g/dm³ | 40～60 | GB/T 20020 |
| Carbon Content (Based on material dried at 105℃ for 2 hours) | % | 4.5～6.5 | GB/T 20020 |
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