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General
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Microsilica
is a by product of the manufacture of silicon and ferrosilicon alloys. It
consists of grey powder having extremely fine spherical particles of
amorphous silica (sio2).
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Silica fume
is a very fine pozzolanic material, composed of amorphous silica produced by
electric arc furnaces as a byproduct of the production of elemental silicon
or ferro silicon alloys.
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Silica fume,
also known as microsilica, is a byproduct of the reduction of high-purity
quartz with coal in electric furnaces in the production of silicon and
ferrosilicon alloys.
Applications
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Silica fume
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.
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Silica Fume
is used in concrete to improve its properties. It has been found that Silica
Fume improves compressive strength, bond strength, and abrasion resistance;
reduces permeability; and therefore helps in protecting reinforcing steel
from corrosion.
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Silica fume
is a by-product of producing silicon metal or ferrosilicon alloys in
smelters using electric arc furnaces. These metals are used in many
industrial applications to include aluminum and steel production, computer
chip fabrication, and production of silicones, which are widely used in
lubricants and sealants.
Market
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The
globalisation of the Indian economy paved the way for easy availability of
micro-silica and latest superplasticisers in the country. M60 and higher
grades of concrete are now becoming popular in the country with its proven
utility in the construction of important structures.
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A major
marketing firm of microsilica in the country has estimated its turnover in
the current year be approximately seven to eight hundred million rupees.
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In global
competition within the metal industry and especially regarding microsilica,
there is a high demand for logistic efficiency. To move microsilica from one
side of the world to the other is a very costly.
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