What is Silica Fume
Silica Fume originates from the oxidation of the SiO gas produced during the fabrication of Silicon metal, Ferrosilicon alloys and CaSi alloys in electric furnaces. The SiO2 formed is then condensed into spherical particles and recovered in bag house filters.
is a concrete admixture that increases its strength and durability and reduces porosity and permeability.
Silica fume is a co-product from the production of silicon or ferrosilicon metal. Silica fume is a mineral admixture, a very fine powder of spherical particles that average 0.1 to 0.3 microns in diameter with a surface area of 17 to 30 m2/g. Silica fume is used in a variety of cementitious concrete, grouts and mortars, refractory, elastomer and polymer applications. Silica fume powder is gray to off-white in color
When silica fume is used in concrete, shotcrete and repair products, it performs as a filler, improving the physical structure by occupying the spaces between the cement particles, and as a reacting chemical (pozzolanic) to create greater strength and durability to concrete.