Mix design and performance of warm-mix recycled asphalt

During recent decades, several studies have been performed on pavement recycling by using mixing temperatures that are lower than those used in traditional hot asphalt mixtures. Warm-mix recycled asphalt with bitumen emulsion is a new recycling technique that is considered a very promising solution in terms of technical, economic and environmental performance. In addition, it allows recycling at low temperature; it increases the amount of recycled pavement, saves energy and reduces carbon dioxide emissions. This technique was recently applied to a Portuguese road. The mix design method and performance of warm-mix recycled asphalt were studied. The aim of this study was to contribute to the definition and development of the warm-mix recycled asphalt design method and to analyse its performance in relation to traditional hot asphalt mixtures.