Микрокремнезем-гранул

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 2)Specification-Refractory Grade AnalysisResultResultResultResultResultSF94SF95SF96SF97SF98SiO2(%)Min94.5095.5096.5097.1098.1Fe2O3(%)Max0.250.230.20.10.7Al2O3(%)Max0.250.220.20.10.7CaO(%)Max0.350.300.250.150.11Na2O + K2O(%)Max0.30.280.250.150.09Moisture(%)Max 1.75 1.45 1.1 0.8 0.65 Loss on Ignition 1.65 1.55 1.45 1.30 1.02 Bulk Density (kg/m3)200-350200-350200-350200-350200-350 4.Packing: Building Grade: 900kg/bag or as per customer’s request Refractory Grade: 500kg/bag, 2 bags with one pallet. 5.Capacity: Building Grade: 18-20 MT into one 20 FCL. Refractory Grade: 20MT into one 40HQ. 6. Delivery Time:2 weeks after payment.