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Microsilica (Silica Fume)
Microsilica, or silica fume, is a highly reactive material used in small quantities to enhance concrete properties. It is a byproduct of electric arc furnaces used in special metals production. Microsilica finds applications across various industries, including refractories, plastics, clay, electronic materials, adhesives, silicone rubber, and precision casting.
What is Silica Fume?
Silica fume, or microsilica, is an amorphous (non-crystalline) form of silicon dioxide. This extremely fine powder, collected as a byproduct of silicon and ferrosilicon alloy production, consists of spherical particles averaging 150 nm in diameter.
Advantages of Microsilica
- Reduces steel corrosion
- Reduces concrete permeability
- Enhances concrete durability
- Increases final strength
- Beneficial for high-resistance concrete applications
- Improves bond strength to steel
