Hundred times smaller than cement, condensed silica fume is known to be durable and highly resistant to elevated temperatures, making its appropriate use a breakthrough technology in smart buildings.
Condensed silica fume (CSF) was first mentioned in a US patent by James William Sharp in 1944. The first testing of CSF in Portland-cement-based concretes was carried out in 1952.
CSF is a fine pozzolanic, amorphous material, a bi-product of silicon and ferrosilicon alloys. It is normally produced from silica or quartz (SiO2) and carbon (C) in electric arc furnaces subjected to a temperature of 2000°C.
Dr Karthikeyan Jayakumar, Assistant Professor, Department of Civil Engineering, NIT-Trichy, a PhD in structural engineering from IIT-Roorkee, with degrees in ME (structural engineering) and BE (civil engineering), shares more on the material with CW.
Advantages of using CSF in concrete