Effect of interactive aging considering ultraviolet on rheological properties of SBR modified asphalt and analysis of the aging mechanism
Article
Figures
Metrics
Preview PDF
Reference
Related
Cited by
Materials
Abstract:
Considering the influence of ultraviolet aging on the properties of SBR modified asphalt, two interactive aging methods (1. SBR modified asphalt +RTFOT+PAV+UV; 2. SBR modified asphalt +RTFOT+ UV+PAV) were used to prepare aged asphalt, and the five kinds of aged asphalt were tested by DSR, BBR, DSC differential heat test and IR spectroscopy. The results showed that the rheological properties of SBR modified asphalt after short-term aging were similar to that after UV aging and PAV aging respectively. However, the rheological properties and aging degree of SBR modified asphalt after further aging were significantly changed after PAV aging and UV aging respectively, and UV aging effect on asphalt was very obvious. The interactive aging results of different aging sequences were also quite different. Compared with the first aging mode, the second one had a more significant effect on the rheological properties of SBR modified asphalt. PAV and UV aging have different aging mechanisms respectively, and the experimental results of SBR modified asphalt undergoing interactive aging were the concrete embodiment of the superposition of these two different aging mechanisms.
