**4. Conclusions**

The high-temperature rutting resistance and low-temperature cracking resistance of asphalt under multiple conditions of heat, UV and aqueous solution were investigated by DSR test. The related mechanisms of changes in aging performance were discussed by the characterization of the chemical structure and element composition.


This study explored the short-term cycling effect of heat, light and water on asphalt to provide an idea for simulation testing and anti-aging technology of asphalt under multiple aging conditions. The findings of this study also help to restore the lost properties of the binder from RAP, showing the significant economic and environmental outcomes. In future research, we will use the SARA test to investigate the influence of multiple aging conditions on the four components, and further explore the evolution of asphalt performance under multiple aging conditions.

**Author Contributions:** Y.Z.: Conceptualization, Experiment, Writing—Original Draft. L.P.: Editing, Formal Analysis. S.X.: Methodology, Formal Analysis. S.W.: Writing—Review and Editing. M.Y.: Validation, Data curation. S.A.: Editing, Supervision. H.X.: Data Curation, Software. Y.L.: Visualization, Software. X.G.: Experiment, Validation. All authors have read and agreed to the published version of the manuscript.

**Funding:** This research was funded by the National Natural Science Foundation of China [52108416]; the Independent Innovation Foundation of Wuhan University of Technology [223131001]; and Hubei Province Supports Technological Innovation and Development Projects for High-Tech Enterprises (2021BAB074).

**Institutional Review Board Statement:** Not applicable.

**Informed Consent Statement:** Not applicable.

**Acknowledgments:** This work was supported by the National Natural Science Foundation of China [52108416]; the Independent Innovation Foundation of Wuhan University of Technology [223131001]; and Hubei Province Supports Technological Innovation and Development Projects for High-Tech Enterprises (2021BAB074).

**Conflicts of Interest:** The authors declare no conflict of interest.
