silica fume for concrete

silica fume SiO2:90%MIN Bulk density: 550-700kgs/m3 Moisture:3%max LOI:3% max Microsilica , also called silica fume or micro silica, is a byproduct of producing silicon metal or ferrosilicon alloys.  Silicon metal and alloys are produced in electric furnaces. The raw materials are quartz, coal, and woodchips.  The smoke that results from furnace operation is collected and sold as silica fume, rather than being land filled.  Silica fume consists primarily of amorphous (non-crystalline) silicon dioxide (SiO2), its average granule diameter is 0.15~0.20 µm,specific surface area is 15000~20000 m2/kg, and it has extremely strong surface active. Microsilica can be used in a variety of cementation products, such as concrete, grouts, and mortars as well as elas

Different Grade: 

Analysis	Specifications
	SF90	SF94	SF94
SiO2(%)(min.)	90	94	94
Moisture(%)max	3	3	3
Loss on Ignition (L.O.I) max	4	4	4
Bulk Density (kg/m³)	550-750	300-450	550-750

silica fume for concrete