Print Email Facebook Twitter Ageing effect on the relaxation properties of bitumen Title Ageing effect on the relaxation properties of bitumen Author Jing, R. (TU Delft Pavement Engineering) Varveri, Aikaterini (TU Delft Pavement Engineering) Liu, X. (TU Delft Pavement Engineering) Scarpas, Athanasios (TU Delft Pavement Engineering) Erkens, S. (TU Delft Pavement Engineering) Contributor Masad, Eyad (editor) Bhasin, Amit (editor) Scarpas, Tom (editor) Menapace, Ilaria (editor) Kumar, Anupam (editor) Date 2018 Abstract The ageing of bitumen has a significant impact on the mechanical behavior of asphalt concrete. In this study, Dynamic Shear Rheometer (DSR) tests were utilized to investigate the effect of ageing on the relaxation properties of bituminous materials. PEN 70/100 bitumen films with thickness of 2 mm were exposed to laboratory ageing at various conditions. Specifically, different combinations of ageing time, temperature and pressure were applied on the bitumen films. Three evaluation indices, explicitly the shear stress at 0 s and 100 s, the ratio of shear stress at 0 s and 100 s and the time that shear stress reduces to 50% and 25% of the initial value, were used to determine the evolution of the relaxation properties of bitumen. The results show that, in comparison to fresh bitumen, aged samples show higher residual shear stresses after relaxation and are more susceptible to stress accumulation thus cracking. In addition, temperature, followed by pressure and ageing time, was found to have the stronger impact on bitumen ageing. To reference this document use: http://resolver.tudelft.nl/uuid:53dd8191-e51c-46d0-92bc-0f1ff6caa6e8 DOI https://doi.org/10.1201/9780429457791-101 Publisher CRC Press ISBN 9781138313095 Source Advances in Materials and Pavement Prediction: Papers from the International Conference on Advances in Materials and Pavement Performance Prediction (AM3P 2018), April 16-18, 2018, Doha, Qatar Event AM3P 2018: International Conference on Advances in Materials and Pavement Performance Prediction, 2018-04-16 → 2018-04-18, Doha, Qatar Part of collection Institutional Repository Document type conference paper Rights © 2018 R. Jing, Aikaterini Varveri, X. Liu, Athanasios Scarpas, S. Erkens Files PDF jinaeo.pdf 971.44 KB Close viewer /islandora/object/uuid:53dd8191-e51c-46d0-92bc-0f1ff6caa6e8/datastream/OBJ/view