Densified Silica Fume for Concrete

Silica Fume/Micro Silica 1. Introduction: Silica fume, also called as micro silica, silica dust, is a by-product of producing silicon metal or ferrosilicon alloys. Silica fume consists primarily of amorphous (non-crystalline) silicon dioxide (SiO2). The individual particles are extremely small, approximately 1/100th the size of an average cement particle. Because of its fine particles, large surface area, and the high SiO2 content, silica fume is a very reactive pozzolan when used in concrete. 2. Application in concrete: Silica fume is widely used in concrete field especially high – performance project, such as bridge , airport, hydropower station and so on. (1)Enhance the mechanical properties of concrete The most important character for concrete – high strength and early strength has been used in substructures of high-performance concrete. (2)Improve the durability of concrete Significant improvements can be seen in the permeability resistance, abrasion resistance, chemical resistance and anti-freezing of concrete. (3)Enhance constructability Contractors can take advantage of the properties of silica-fume concrete to expedite projects or to achieve properties that might otherwise be impossible to achieve. 3. Specification-Building Grade AnalysisResultResultResultResultResultSF85SF88SF90SF92SF93SiO2(%)(min.)85.0588.0590.0592.0593.05Fe2O3(%)0.780.440.210.250.20Al2O3(%)0.290.200.210.250.20CaO(%)0.390.310.310.360.21K2O+ Na2O (%)0.290.240.220.200.20Moisture(%)3.052.552.052.051.03Loss on Ignition (L.O.I) @975OC(%)3.383.102.381.751.50Bulk Density (kg/m³)500-700500-700500-700500-700500-700 4.Packing:900kg/bag or as per customer’s request 5.Capacity:18-20 MT into one 20 FCL. 6. Delivery Time:2 weeks after payment. 7. Contact Information Fiona Fan Tel: 86-592-2612161 Fax: 86-592-2612133