In the last decade, the usage of reclaimed asphalt pavement (RAP) has been widely used. However, the RAP asphalt (aged asphalt)can decrease the service life of pavement, since it has undesirable properties. The objective of this study is to investigate the possibility of using hybrid rejuvenating agent comprising waste engine oil (WEO) and maltene (MLT) for restoring the properties of aged asphalt. The aged asphalt was respectively supplemented with 5, 7.5, and 10% WEO-MLT by weight of total asphalt binder. The rejuvenated asphalt was assessed in terms of the properties of penetration, softening point, ductility, and viscosity. The results show that increasing the stiffness of the aged asphalt could be mitigated through the addition of WEO-MLT in a 7.5% concentration, which also increased the penetration and ductility and while the softening point was reduced. Furthermore, viscosity was returned to nearly the same level as that of virgin asphalt.
Volume 12 | Issue 6
Pages: 3131-3135
DOI: 10.5373/JARDCS/V12I6/S20201278