85% Densified Microsilica (Silica Fume) 85D
85% Densified Silica Fume (85D) is a type of silica fume that has been processed to increase its bulk density. This makes it easier to handle and transport, and can also improve its performance in concrete.
85% Densified Silica Fume, is a byproduct of the production of silicon and ferrosilicon alloys. It is a highly reactive pozzolan with a high silica content of over 85% and a bulk density of around 550-700 kg/m3. The specific surface area of 85% Densified Silica Fume is very high, ranging from 15,000 to 30,000 m2/kg, making it an ideal supplementary cementitious material for enhancing the strength, durability, and workability of concrete.
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Parameters
Property | Value |
---|---|
SiO2 (Amorphous) | 85% min |
SO3 | 2.0% max |
Cl | 0.3% max |
Free CaO | 1.0% max |
Moisture | 3.0% max |
LOI (Loss on Ignition) | 6.0% max, typical 2.10% |
Specific Surface (BET) | 15 m2/gram min |
Bulk Density | 550-700 kg/m3 |
Pozzolanic Activity Index – 7 days accelerated curing | 105% min |
Retained on 45 Micron Sieve | 10% max |
Variation from Avg. Retained on 45 Micron Sieve | 5% max |
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Founded in 2001, HSA is a leading provider of Silica Fume and Abrasives in China, and also the premium source of high-performance Products for concrete and abrasives industries.