Information AboutSilica Fume |
| CATEGORIES ABOUT SILICA FUME | |
| ceramic materials | |
| glass | |
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Silica fume consists of very fine Vitreous particles with a surface area on the order of 215,280 ft2/lb (20,000 m2/kg) when measured by Nitrogen Absorption Techniques , with particles approximately 100 times smaller than the average cement particle. Because of its extreme fineness and high Silica content, silica fume is a highly effective Pozzolanic material (ACI Comm. 226 1987b; Luther 1990). Silica fume is used as an admixture in Portland Cement Concretes to improve their qualities. It has been found that silica fume improves Compressive Strength , Bond Strength , and Abrasion resistance. It also reduces Permeability which indirectly helps protect a concrete's Reinforcing Steel from Corrosion , especially in chloride-rich environments such as those of northern roadways and runways (because of the use of Deicing salts) and saltwater bridges. U.S. Department of Transportation, Federal Highway Administration |
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