Silica Fume

SILICA FUME

Tech Silica offers a variety of grades of Zircon-based and silicon-based silica fume. Click on a category below to learn more.

Zircon-based Fume

Silicon-based Fume

What is Silica Fume?

Silica Fume

Silica fume originates from the oxidation of SiO gas produced in the processing of zircon sands, silicon sands, and ferrosilicon alloys in electric furnaces. The SiO2 formed is condensed into spherical particles and recovered in bag house filters.

Silica fume is a mineral admixture, composed of submicron particles (100 to 150 times smaller than a grain of cement) of amorphous silicon dioxide. It can vary in color from dark gray to bright white and is available in several product forms and packaging options.

When used in cementitious applications (concrete, shotcrete, repair products, oil well grouts), silica fume acts as both a filler - improving the physical structure by occupying the spaces between the cement particles - and as a “pozzolan” reacting chemically to impart far greater strength and durability to concrete.

In refractory and ceramic applications, silica fume is used for its ability to improve flow characteristics and its unique particle packing ability.

Silica Fume Applications & Benefits
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