Silica Fume
Silica fume is a byproduct of the reaction between quartz and coal, coke, or wood chips and also forms in the production of silicon and ferrosilicon alloys. Silica fume is another silica-based additive used in cementitious applications. It is classified as ultrafine, with the size of spherical particles being less than 1 µm in diameter, 100 – 150 times smaller than an average cement particle. It acts as a pozzolan and filler when used in cementitious applications like concrete, repair products,