Examining the efficacy of promising antioxidants to mitigate asphalt binder oxidation: insights from a worldwide interlaboratory investigation

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Adwani, Dheeraj, Pipintakos, Georgios, Mirwald, Johannes, Wang, Yudi, Hajj, Ramez, Guo, Meng, Liang, Meichen, Jing, Ruxin, Varveri, Aikaterini, Zhang, Yuan et al (show 17 more authors) , Pei, Ke, Xu, Xiong, Leng, Zhen, Li, Danning, Villamil, William, Caro, Silvia, Chailleux, Emmanuel, Cantot, Justine, Weigel, Sandra, Skultecke, Judita, Tarsi, Giulia, Margaritis, Alexandros, Wang, Haopeng ORCID: 0000-0002-5008-7322, Hu, Yongping, Airey, Gordon, Sreeram, Anand and Bhasin, Amit (2024) Examining the efficacy of promising antioxidants to mitigate asphalt binder oxidation: insights from a worldwide interlaboratory investigation INTERNATIONAL JOURNAL OF PAVEMENT ENGINEERING, 25 (1). 2332363-. ISSN 1029-8436, 1477-268X

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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.

Item Type:	Article
Uncontrolled Keywords:	Asphalt oxidation, binder aging, antioxidant additives, binder rheology, binder chemistry
Divisions:	Faculty of Science & Engineering > School of Engineering
Depositing User:	Symplectic Admin
Date Deposited:	19 Apr 2024 14:11
Last Modified:	16 Jun 2026 20:03
DOI:	10.1080/10298436.2024.2332363
Related Websites:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3180464
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