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Micro Silica Powder | ||||||
Inspection items | Index | |||||
SiO2 | ≥92% | |||||
Loss on ignition | ≤4% | |||||
Chloride ion | ≤0.02% | |||||
Total alkali content | ≤0.6% | |||||
Sulfur trioxide | ≤1% | |||||
Metallic silicon | ≤0.4% | |||||
Moisture content | ≤2% | |||||
Free calcium oxide | ≤0.8% | |||||
Specific surface area | ≥18000㎡/kg | |||||
45 micron sieve residue | ≤5% | |||||
Water demand ratio | ≤125% | |||||
Activity index | 3d | ≥90% | ||||
7d | ≥95% | ≥105%(Fast method) | ||||
29d | ≥115 |
Micro Silica Price | ||||||
Inspection items | Index | |||||
SiO2 | ≥95% | |||||
Loss on ignition | ≤3% | |||||
Chloride ion | ≤0.02% | |||||
Total alkali content | ≤0.6% | |||||
Sulfur trioxide | ≤0.8% | |||||
Metallic silicon | ≤0.3% | |||||
Moisture content | ≤2% | |||||
Free calcium oxide | ≤0.6% | |||||
Specific surface area | ≥18000㎡/kg | |||||
45 micron sieve residue | ≤3% | |||||
Water demand ratio | ≤125% | |||||
Activity index | 3d | ≥95% | ||||
7d | ≥100% | ≥100%(Fast method) | ||||
29d | ≥120 |