Selection of reclaimed asphalt pavement sources and contents for asphalt mix production based on asphalt binder rheological properties, fuel requirements and greenhouse gas emissions

This paper characterizes the effects of reclaimed asphalt pavement (RAP) source on the rheological properties of virgin asphalt binders blended with 15% and 30% recovered binders. The recovered binders were extracted from three local RAP sources namely; the North-South Expressway (NSE), Damansara-Puchong Expressway (DPE) and Public Works Department (PWD) roads. The results showed that RAP source significantly influence the binder rheological properties at each aging state and test temperature. Environmental impacts were analyzed by estimating fuel requirements and Greenhouse Gas emissions in an asphalt mixing plant which was found to depend on RAP source and RAP content. Three scenarios were suggested to select the optimum RAP source and RAP content based on fuel requirement, emissions, and environmental condition. (C) 2011 Elsevier Ltd. All rights reserved.