it was dark color material, special and seldom it has the higher activity Index more than 135%. bulk density 500-700KG/M3

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

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

micro silica use in concrete