2023 Volume 79 Issue 21 Article ID: 23-21033
The warm-mix asphalt technology is expected to reduce carbon dioxide emissions when manufacturing asphalt mixtures, improve workability, and reduce asphalt fumes. The effects of the number of repeated cycles and the composition of rejuvenators on the properties of recycled mixtures have been clarified, and it is necessary to clarify these effects on recycled warm-mix asphalt mixture. In this study, the properties of recycled warm-mix asphalt mixture made from repeatedly recycled aggregate and foamed asphalt binder was compared with those of a normal recycled asphalt mixtures. As a result, at the high-temperature Cantabro loss rate was often higher in the recycled warm-mix asphalt mixture than in the recycled mixture, indicating the possibility of lower cracking resistance. However, by using rejuvenator with a high aromatic content, it was found that the decrease in cracking resistance at high temperature, and the properties became equivalent to those of the ordinary recycled asphalt mixture.
