Investigation on the mechanism and performance of asphalt and its mixture regenerated by waste engine oil

Abstract

Waste engine oil (WEO) is planned to be used as a regenerating agent for asphalt pavement materials to regenerate the reclaimed asphalt pavement (RAP) and recovery their road performance. To enhance the modification effect of WEO on the road performance of asphalt mixture, the furfural extraction oil and epoxy resin are added to compound with the WEO as well. The modern testing techniques were used to reveal the mechanism of WEO-RA from the microscopic scale. The macroscopic properties of asphalt such as the physical, rheological and anti-aging properties of asphalt were investigated to study the regeneration effect of WEO on the technical performance of aged asphalt. The road performance and mechanical properties of recycled asphalt mixtures were investigated extensively. The results show that WEO can be used to recovery the aged asphalt by modifying its components, the modification of WEO on aged asphalt is a physical way. The thermal stability of WEO regenerated asphalt (WEO-RA) is slightly worse than that of the original asphalt, but the WEO-RA has good thermal stability. Physical and high-temperature rheological performance of WEO-RA is almost the same with original asphalt. The low-temperature property rheological performance WEO-RA is two PG better than that of original asphalt. The long-term anti-aging performance of WEO-RA is as good as original asphalt. The performance of WEO-RA has good storage stability. The asphalt mixtures with 0–50% RAP meet the road performance requirement, what’s more, the both the high-temperature and low-temperature performance of asphalt mixture are enhanced with different contents of RAP regenerated by WEO.