The impact of reactive oxygen species coupled with moisture on bitumen long-term aging

Sadaf Khalighi*, Kristina Primerano, Johannes Mirwald, Bernhard Hofko, Aikaterini Varveri

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

Abstract

Bitumen, a crucial constituent in the composition of asphalt pavements, plays a vital role in the performance and durability of pavements. Bitumen undergoes aging over time due to complex interactions between its chemical components and various environmental factors. In this investigation, the study focuses on examining the aging process of bitumen under the combined influence of moisture and reactive oxygen species (ROS). The findings highlight the importance of considering ROS and moisture as critical factors contributing to accelerated aging. Results obtained from Fourier-transform infrared (FTIR) spectroscopy, SARA fractionation, and optical inverse microscope (OIM), as well as dynamic shear rheometer (DSR) examination, indicate that the concurrent influence of these factors induces significant aging in bitumen, with the extent of this impact being modulated by the bitumen's inherent aging susceptibility. The insights obtained from this study enhance strategies to justify the destructive impacts of aging, extending the operational lifespan of asphalt pavements.
Original languageEnglish
Article number2438343
Number of pages20
JournalRoad Materials and Pavement Design
DOIs
Publication statusPublished - 2025

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

  • dynamic shear rheometer
  • FTIR
  • moisture aging
  • optical inverse microscopy
  • SARA fractionation
  • Viennese binder aging

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