... Powder&Grain Microsilica Bulk Density:550-700kgs/m3 Microsilica. silica fume concrete in the application1,Manufacture high-strength concrete (C70 above), ... erosion resistance is very demanding, micro-doped silica fume is necessary; 5,micro-silica fume strong activity, a caustic water properties, ... as: Pier dam, and drilling platforms, etc.) used in concrete admixture micro silica/silica fume