Silica Fume Concrete Silica Powder

SF90#CHEMICAL ANALYSISPARAMETERSTANDARDResultASTM C 1240-051SiO2 (%)90%min92.88%90%min2Fe2O3(%)2%max0.18%3%max3Al2O3(%)2%max0.19%6%max4CaO(%)2%max0.08%------5Na2O2%max0.35%------6Mositure(%)2%max0.50%------7LOI(%)3.%max2.40%------SGS certificate with ASTM-C1240 Standard#PHYSICAL PARAMETERSPARAMETERSTANDARDResultASTM C 1240-051ParticleSize +/-0.045mm99%min99.87%------2Oversize variation % point from average(%)2.01%5%max3Pozzolanic Activity Index (7 days)≥110%1.2105%min4Surface Area15000-27000m2/kg22630m2/kg15000m2/kgmin5Bulk Density(Densified)550-700kg/m3650kg/m3650kg/m3Brief IntroductionMicrosilica fume (scientific name "silica fume," Microsilica or Silica Fume), in the smelting of ferrosilicon and industrial silicon, silicon through the flue gas emitted by steam oxidation, the specially designed filter collected the amorphous powder like silica (SiO 2). Micro-silica fume average 0.1-0.15 μ m in diameter, the size of several cement average 1.0%. Surface area for the 15-27 m 2 / g, with strong surface activity. Features Characteristics1).Appearance is as grey&white off.
2).High electrical resistivity
3).Low Permeability
4).Superior resistance to chemical attack from chlorides,acids and sulfates
5).Low chloride ion diffusion
6).High reactive Pozzolan
7).High temperature strength
8).Improved stability ingeothermal environment