Microsilica for concrete has extremely strong surface active. lower permeability, paper bags can be dissolve when in water

Micro silica( Silica fume), be used in concrete. it can be  improve concrete’s properties such as compressive strength, bond strength andabrasion resistance, reduces permeability,and therefore helps in protecting reinforcing steel from corrosion.

At the same time, Micro slica can still be used in the procustion of refractory and porcelain, to rais intensity and durability,it also can be used in paint, coating resin rubber and other high molecular as a filler material to improve the material overall performance

Silica fume for ASTM C 1240