C06-C07 Award lecture

[C06] Toward the establishment of sustainable separation and recycling technology for asphalt mixtures -Rejuvenating aging bitumen by hydropyrolysis-

○Kengo Akatsu¹, Kanou Yousuke¹, Akiba Shouichi¹ (1. Dept. of Civil Eng., Faculty of Production Eng., Nihon University)

Keywords:asphalt mixture, aging bitumen, hydropyrolysis

The authors focus on hydrothermal decomposition, which is used in various fields as an organic matter decomposition technology, and propose a recovery technology for aged bitumen. According to this study, bitumen after hydrothermal decomposition with a reaction temperature of 350 to 360 °C and areaction time of about 15 minutes showed a significant recovery of physical properties. From the chemical properties, it was confirmed that the degree of oxidation did not decrease by the conventional regeneration method. From the dynamic viscoelasticity, the possibility of using it as a regenerated and heated asphalt mixture was confirmed.