Microsilica.
Microsilica, also known as silica fume, it is a very fine pozzolanic material, composed of amorphous silica produced byelectric arc furnaces as a byproduct of the production of elemental silicon or ferro silicon alloys. Microsilica can be used in a variety of cementitious products such as concrete,grouts,and mortars as well as elastomer, polymer,refractory, ceramic and rubber applications.
SiO2 90%
Fe2O3 0.06%
Al2O3 0.22%
CaO 0.21%
LOI 2.82%
Moisture 0.13%
Pozzolanic Activity Index: 130%
Bulk Density: 610kg/m3