Microsilica, Silica Fume Suppliers - Oriental Trexim Private Limited is a leading Exporter, Supplier, Manufacturer of Micro-White Microsilica, Microsilica, Silica Fume, Fumed Silica, Metakaolin, Microwhite Silica Fume and other material like Super Plasticizers in India.
Silica fume, also known as micro silica, is an amorphous (non- crystalline) polymorph of silicon dioxide. It is an ultrafine powder collected as a by-product of the silicon and ferrosilicon alloy production and consists of spherical particles with an average particle diameter of 150 nm1application is as pozzolanic material for high performance concrete. Silica fume is an ultrafine airborne material with spherical particles less than 1 μm in diameter, the average being about 0.1 μm. This makes it approximately 100 times smaller than the average cement particle. Because of its extreme fineness and high silica content, silica fume is a very effective pozzolanic material. Standard specifications for silica fume used in cementitious mixtures are ASTM C1240,EN 13263.
Silica fume-Microsilica is added to Portland Cement Concrete to improve its properties, in particular its compressive strength, bond strength, and abrasion resistance. These improvements stem from both the mechanical improvements resulting from addition of a very fine powder to the cement paste mix as well as from the Pozzolanic reactions between the silica fume and free calcim hydroxide in the paste. Addition of silica fume also reduces the permeability of concrete to chloride ions, which protects the reinforcing steel of concrete from corrosion, especially in chloride-rich environments such as coastal regions and those of humid continental roadways and runways (because of the use of deicingsalts) and saltwater bridges.More Details