Effects of Electronic Waste Powder on Asphalt Binder Properties

Abstract

Asphalt binders for various types of pavement construction that were modified with various contents of electronic waste powder (EWP) were characterized. The effects of EWP content on asphalt physical properties, storage stability at high temperatures, dynamic rheological parameters, and low-temperature cracking resistance were studied. Chemical properties of modified mixtures were studied using IR spectroscopy. Experimental results showed that EWP did not react chemically with the asphalt binder Studies of the physical properties of mixtures showed that EWP additives could increase significantly the high-temperature asphalt performance. Studies of storage stability showed that modified mixtures were highly stable with EWP contents <20%. If the EWP content was increased, the complex shear modulus of modified asphalt increased whereas the phase angle decreased significantly. On the other hand, bending beam rheometer (BBR) tests showed that EWP additives did not improve the low-temperature performance of asphalt binder.