Rheological Characteristics of Waste Engine Oil-Modified Bituminous Binder

Bituminous binders encounter different distress during the life cycle of flexible pavement construction. Fatigue cracking and rut resistance are the most important characteristics of the binder. Addition of environmental-friendly modifiers/additives into the binder improves the rheological properties of bituminous binders. In this study, the effect of waste engine oil (WEO) on rheological characteristics of plain bitumen (VG30) as an additive was assessed through laboratory investigations. Also rutting and fatigue performance characteristics of the modified bitumen were investigated using Dynamic Shear Rheometer. From the Multiple Stress Creep Recovery test, the percentage recovery and Non-recovery creep compliance at different dosages of additive were evaluated. Linear Amplitude Sweep to determine \({\text{G}}\, * \,/{\text{sin}}\delta\) and \({\text{G}}\, * \,{\text{sin}}\delta\) indices for the bio-additive modified bitumen containing different percentages of WEO. The chemical properties of waste engine oil were identified by conducting Fourier Transform Infra-Red Spectroscopy. Overall it was found that WEO can be used as a softening agent to the aged bituminous binder.