About G R Enterprises
G R Enterprises is a leading supplier or manufacture of Fly Ash, GGBS, Hydrated Lime Powder, AAC Light Weight Block, Carbide Lime Sludge in and around Bangalore.
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Fly ash is one of the residues generated in combustion, and comprises the fine particles that rise with the flue gases. Ash which does not rise is termed bottom ash. In an industrial context, fly ash usually refers to ash produced during combustion of coal. Fly ash is generally captured by electrostatic precipitators or other particle filtration equipments before the flue gases reach the chimneys of coal-fired power plants, and together with bottom ash removed from the bottom of the furnace is in this case jointly known as coal ash. Depending upon the source and makeup of the coal being burned, the components of fly ash vary considerably, but all fly ash includes substantial amounts of silicon dioxide (SiO2) (both amorphous and crystalline), being endemic ingredients in many coal-bearing rock strata.
Fly ash is comprised of the non-combustible mineral portion of coal. it is first ground to the fineness of powder. The carbon is consumed leaving molten particles rich in silica, alumina and calcium. These particles solidify as microscopic, glassy spheres that are collected from the power plants exhaust before they can fly away - hence the products name: Fly Ash.
GGBS is a fine powder, used in concrete as "cement", major use in ready mixed concrete (RMC) or in the production of Portland slag cement. GGBS replaces a substantial proportion of normal cement (Ordinary Portland Cement) in RMC. The mixing varies from 30% to 70% approximately (generally 50%). The higher the proportion, the better is durability for concrete. GGBS is also in other forms of concrete including site-batched and pre-cast.
Replacement of Portland Cement by adding up to 70% GGBS, reduce cement content in concrete from about 530 Kg/m3 to 160 Kg/m3 and despite of this large reduction of cement in concrete, ultimate strength is not affected, also considerable improvement in durability properties is observed. GGBS slag is byproduct of iron and steel manufacturing process. It contains the entire basic constituent of OPC but not exactly in the same ratio and chemical form. Slag itself has no cementing property but when mixed with OPC or activated chemically it develops hydraulic properties similar to cement. The calcium oxide (CaO) found in slag is tied up as calcium silicate, calcium aluminates and calcium aluminosilicate. Although these compounds are not identical to those found in Portland cement (i.e. tricalcium silicate, tricalcium aluminate, etc), they hydrate when activated by calcium hydroxide generated during the hydration of Portland cement. Since GGBS is almost 100% glassy, it is generally more reactive. This process of quenching is called granulation because it produces glassy granules similar in appearance to coarse sand, having excellent cementitious property when ground to high fineness and mixed with cement.