silica fum

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silica fum
Posting date : Jul 02, 2009
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28-
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Microsilica (silica fume) is a by-pruduct of metallic silicon and ferrosilicon production process.It can be used as HPC additives,and make a good performance at improving strength and density ,enti-permeability,ect. our pruduct cover the ranges 85%~95%, 1: physical properties average size of Microsilica is Between 0.1-015 μm typical color: grey-black B.E.T Fineness: 15~27 m2 Bulk density: undensified 150~220 kg/m3 semi-densified 300~400 kg/m3 densified 550~700 kg/m3 activity target:95%--110% water requirement: ≤125% 2.the main chemical properties of microcilica is SiO2,its content is about 85-95%, its main elements include Fe2O3,Al2O3,CaO,K2O,Na2O,MgO ,C and so on.

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