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

Adwani, Dheeraj; Pipintakos, Georgios; Mirwald, Johannes; Wang, Yudi; Hajj, Ramez; Guo, Meng; Liang, Meichen; Jing, Ruxin; Varveri, Aikaterini; Zhang, Yuan; Pei, Ke; Xu, Xiong; Leng, Zhen; Li, Danning; Villamil, William; Caro, Silvia; Chailleux, Emmanuel; Cantot, Justine; Weigel, Sandra; Škulteckė, Judita; Tarsi, Giulia; Margaritis, Alexandros; Wang, Haopeng; Hu, Yongping; Airey, Gordon; Sreeram, Anand; Bhasin, Amit

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.

Citation

Adwani, D., Pipintakos, G., Mirwald, J., Wang, Y., Hajj, R., Guo, M., …Bhasin, A. (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), Article 2332363. https://doi.org/10.1080/10298436.2024.2332363

• Journal Article Type: Article
• Acceptance Date: Mar 11, 2024
• Online Publication Date: Apr 2, 2024
• Publication Date: 2024
• Deposit Date: Apr 8, 2024
• Publicly Available Date: Apr 3, 2025
• Journal: International Journal of Pavement Engineering
• Print ISSN: 1029-8436
• Electronic ISSN: 1477-268X
• Publisher: Routledge
• Peer Reviewed: Peer Reviewed
• Volume: 25
• Issue: 1
• Article Number: 2332363
• DOI: https://doi.org/10.1080/10298436.2024.2332363
• Keywords: Asphalt oxidation; binder aging; antioxidant additives; binder rheology; binder chemistry
• Public URL: https://nottingham-repository.worktribe.com/output/33294164
• Additional Information: Peer Review Statement: The publishing and review policy for this title is described in its Aims & Scope.; Aim & Scope: http://www.tandfonline.com/action/journalInformation?show=aimsScope&journalCode=gpav20; Received: 2023-08-21; Accepted: 2024-03-11; Published: 2024-04-02