it was dark color material, especial and seldom it has the higher activity Index more than 135%. bulk density 670kg/m

Densify Microsilica (silica fume) used in concrete.it can  be improve the coment strong.

  we  has light grey colour,  light grey ,and dark grey  colour . the form  powder and granuler.densify microsilica used in cement, undensified materials and  semi densify are used in refractory,china etc.

micro silica use in concrete