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microsilica
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Advantage of Microsilica
The American Concrete Institute (ACI) defines Microsilica (also known as Silica Fume) as “very fine
noncrystalline silica produced in electric arc furnaces as a by‐product of the production of elemental
silicon or alloys containing silicon”
Microsilica consists of very fine vitreous particles with a surface area ranging from 15 to 30 m2/g,
with particle approximately 100 times smaller than the average cement particle. Because of its
extreme fineness and high silica content, Microsilica is a highly effective pozzolanic material.
Microsilica is used in concrete to improve its properties. It has been found that Microsilica greatly
improves compressive strength, bond strength, and abrasion resistance; reduces permeability; and
therefore helps in protecting reinforcing steel from corrosion.
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