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: the basic physical properties of Microsilica:
average size of Microsilica is Between 0. 1-015 μm
typical color: brown (white in nature, the color is become darker with the density accretion)
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