Abstract
Bitumen ageing is one of the principal factors causing the deterioration of asphalt pavements. As bitumen ages, the pavement loses its ability to relax stresses during loading/unloading and thermal cooling process, thus the risk of cracking increases. Oxidation and ultraviolet (UV) radiation are believed to be the main factors that can cause bitumen ageing during pavement service life. The aim of this study is to evaluate the mechanical behavior of porous and dense asphalt pavements during field ageing. Pavement test sections were constructed in 2014 and are being exposed to actual environmental conditions since then. To investigate the effect of UV radiation on ageing, UV reflective glass-plates were utilized to cover part of the pavement surface. To study the evolution of the pavements’ mechanical properties, asphalt cores were collected from the test sections periodically (at one-year intervals). The changes in the stiffness modulus of the mixtures were determined via cyclic indirect tensile tests. The results show that the effect of mineral aggregate packing, and hence of air-void distribution and connectivity, on the ageing sensitivity (both thermal and UV ageing sensitivity) of the pavements with time was found to be significant, as the changes of the stiffness of the porous mixtures were greater than that of dense mixtures.
Original language | English |
---|---|
Title of host publication | Proceedings of the RILEM International Symposium on Bituminous Materials |
Editors | H. Di Benedetto, H. Baaj, E. Chailleux, G. Tebaldi, C. Sauzéat, S. Mangiafico |
Place of Publication | Cham |
Publisher | Springer Science+Business Media |
Pages | 191-198 |
Number of pages | 8 |
ISBN (Electronic) | 978-3-030-46455-4 |
ISBN (Print) | 978-3-030-46454-7 |
DOIs | |
Publication status | Published - 2021 |
Event | RILEM International Symposium on Bituminous Materials - Online conference, France Duration: 14 Dec 2020 → 16 Dec 2020 https://isbmlyon2020.sciencesconf.org/ |
Publication series
Name | RILEM Bookseries |
---|---|
Volume | 27 |
ISSN (Print) | 2211-0844 |
ISSN (Electronic) | 2211-0852 |
Conference
Conference | RILEM International Symposium on Bituminous Materials |
---|---|
Abbreviated title | ISBM 2020 |
Country/Territory | France |
Period | 14/12/20 → 16/12/20 |
Internet address |
Bibliographical note
Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Keywords
- Dense mixture
- Field ageing
- Porous mixture
- Stiffness
- UV radiation