Using bio-oils for improving environmental performance of an advanced resinous binder for pavement applications with heat and noise island mitigation potential

摘要

Urbanization and actions are responsible for overheated cities compared to the adjacent rural settings, a phenomenon known as Urban Heat Island (UHI). Additionally, conventional urban materials contribute towards the aggravation of urban noise pollution, a phenomenon that may be described as Urban Noise Island (UNI). Numerous solutions have been proposed through the implementation of novel, more sustainable, or natural materials in the pavement infrastructure. To that end, this study bridges the gap between UHI and UNI mitigation strategies, simultaneously ensuring low environmental impact. Therefore, a resin-based pavement binder was investigated through multiphysics analysis, together with four innovative binders made with waste bio-oils. Thermal, optical, acoustical and Life Cycle Assessment analysis were carried out for gauging the UHI/UNI mitigation potential of binders and their environmental impact. Results showed that the innovative binders preserved good physical properties: all binders have solar reflectance higher than 50% within 750-1600 nm range and sound absorption coefficient higher than 0.8 within 600-800 Hz. Additionally, bio-oils decreased the environmental impact of the binder up to 37.46mPt, and 8.33% in the ReCiPe, and Intergovernmental Panel on Climate Change analysis, respectively. Therefore, the exploitation of bio-oils in the pavement market can be considered as promising green solution for mitigating both UHI and UNI.