Silica fume, also known as micro silica, is an amorphous polymorph of silicon dioxide, silica. It is a by-product of the carbothermic reduction of high purity quartz in electric arc furnaces in the production of silicon and ferrosilicon alloys.
Silica fume, a co-product from the production of silicon or ferrosilicon metal, is an amorphous silicon dioxide – SIO2 which is generated as a gas in submerged electrical arc furnaces during the reduction of very pure quartz. This gas vapour is condensed in bag house collections as 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 mortans), refractory, elastomer and polymer applications.
Silica Fume is a mineral admixture, composed of submicron particles (100 to 150 times smaller than a grain of cement) of amorphous silicon dioxide, Silica fume powder is gray to off-white in colour, and is available in several products forms and packaging options.
Our products include:
– Undensified Silica Fum
– Densified Silica Fum
– Corrochem (mineral & chemical admixture)
– Norad (super plasticizer)
When used in cementitious applications (concrete, shotcrete, repair products and oil well grouts), silica fume acts as both a filler – improving the physical structure by occupying the spaces between 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 modify flow characteristic and for its unique particle packing ability.
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