Title
Examining the efficacy of promising antioxidants to mitigate asphalt binder oxidation: insights from a worldwide interlaboratory investigation
Author
Adwani, Dheeraj (University of Texas at Austin)
Pipintakos, Georgios (Universiteit Antwerpen)
Mirwald, Johannes (Technische Universität Wien)
Wang, Yudi (University of Illinois at Urbana Champaign)
Hajj, Ramez (University of Illinois at Urbana Champaign)
Guo, Meng (Beijing University of Technology)
Liang, Meichen (Beijing University of Technology)
Jing, R. (TU Delft Pavement Engineering) 
Varveri, Aikaterini (TU Delft Pavement Engineering)
Date
2024
Abstract
Oxidative aging induces significant stiffening of asphalt binders that leads to a pronounced reduction in the overall durability of asphalt pavements. The strategic implementation of antioxidant additives provides a potential solution to alleviate this issue. This work presents results from the second phase of the global consortium for antioxidants research aimed at investigating the effectiveness of potential antioxidants in increasing the durability of asphalt binders. Sixteen laboratories around the world participated in this effort and a total of 28 binders from diverse geographical regions were tested. Two promising antioxidants, namely zinc diethyldithiocarbamate (ZDC) and kraft lignin were evaluated in this phase and blended with the binders at specific proportions. Subsequently, a comprehensive investigation was conducted to assess rheological characteristics and chemical properties of the various blends, utilising Dynamic Shear Rheometer (DSR) measurements and Fourier Transform Infrared (FTIR) Spectroscopy. The findings indicate that additives such as ZDC hold considerable promise as an effective antioxidant, particularly when considering a wide diversity of binders. In general, its incorporation does not compromise the rutting performance of the binders and significantly improves fatigue performance. Therefore, research efforts should be focused on exploring additional facets to assess its practical applicability in field.
Subject
antioxidant additives
Asphalt oxidation
binder aging
binder chemistry
binder rheology
To reference this document use:
http://resolver.tudelft.nl/uuid:03c3a654-727c-47aa-9ab2-ee3a6a2f4779
DOI
https://doi.org/10.1080/10298436.2024.2332363
Embargo date
2024-10-02
ISSN
1029-8436
Source
The International Journal of Pavement Engineering, 25 (1)
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.
Part of collection
Institutional Repository
Document type
journal article
Rights
© 2024 Dheeraj Adwani, Georgios Pipintakos, Johannes Mirwald, Yudi Wang, Ramez Hajj, Meng Guo, Meichen Liang, R. Jing, Aikaterini Varveri, More Authors