Abstract
To further explore the long-term aging influence on the chemical properties of bitumen, laboratory aging methods were employed to obtain the aged binders with different long-term aging degrees. The chemical properties of virgin and various aged bitumen were evaluated through TCL-FID, ATR-FTIR, Elementary analysis and GPC tests. The chemical characterization results showed that as the aging degree deepened, the resin and asphaltene fractions with larger molecular weight increased dramatically, which resulted in the rise of average molecular weight and the more unevenly molecular weight distribution in aged bitumen. Moreover, the aging of bitumen would lead to the increase of the oxidized functional groups (C=O and S=O) index, oxygen content, aromaticity and polarity, while the reduction of carbon, hydrogen element contents and the H/C ratio.
| Original language | English |
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| Title of host publication | Green and Intelligent Technologies for Sustainable and Smart Asphalt Pavements - Proceedings of the 5th International Symposium on Frontiers of Road and Airport Engineering, IFRAE 2021 |
| Editors | Xueyan Liu, Kumar Anupam, Sandra Erkens, Lijun Sun, Jianming Ling |
| Publisher | CRC Press / Balkema - Taylor & Francis Group |
| Pages | 162-167 |
| Number of pages | 6 |
| ISBN (Print) | 978-103216954-5 |
| DOIs | |
| Publication status | Published - 2022 |
| Event | 5th International Symposium on Frontiers of Road and Airport Engineering, IFRAE 2021 - Delft, Netherlands Duration: 12 Jul 2021 → 14 Jul 2021 |
Conference
| Conference | 5th International Symposium on Frontiers of Road and Airport Engineering, IFRAE 2021 |
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| Country/Territory | Netherlands |
| City | Delft |
| Period | 12/07/21 → 14/07/21 |