Microsilica, also known as silica fume, is a byproduct of the production of silicon metal or ferrosilicon metal. It is collected from flue gases from electric arc furnaces. It is a highly reactive pozzolanic powder and is very important for the concrete industry.
Microsilica is a very fine powder and is usually used in concrete structures that require a high degree of impermeability or require high concrete strength.
Microsilica is being used in more projects where durability and strength are the primary concern

Benefits of Microsilica:
Increased concrete strength
Significantly improved concrete durability
Reduced permeability
Sulfate resistance