SEM Analysis on Electron Arc Furnace Dust (EAFD) and EAFD-Asphalt Mixture

Abstract

Electric Arc Furnace Dust (EAFD) is a by-product of steelmaking industry which has been classified as hazardous. The considerable amounts produced per ton of steel, estimated by 15-20 kg/ton, make it a serious environmental problem that should be addressed. One of the solution scenarios is the use of Solidification/stabilization technology and one of potential candidates is the asphalt as a widely used material in road construction. This paper had an insight view on the microstructure of EAFD and its mixture with asphalt using the scanning electron microscopy (SEM). The scanning results showed that the EAFD small particles fill the air voids in asphalt and those of bigger size get attached to the surface. This was confirmed by the specific gravity and penetration tests.