Publication
Title
Examining the efficacy of promising antioxidants to mitigate asphalt binder oxidation : insights from a worldwide interlaboratory investigation
Author
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.
Language
English
Source (journal)
International journal of pavement engineering. - Newark, N.J.
Publication
Newark, N.J. : 2024
ISSN
1029-8436
1477-268X [online]
DOI
10.1080/10298436.2024.2332363
Volume/pages
25 :1 (2024) , p. 1-14
Article Reference
2332363
ISI
001196073500001
Full text (Publisher's DOI)
Full text (open access)
The author-created version that incorporates referee comments and is the accepted for publication version Available from 02.10.2024
Full text (publisher's version - intranet only)
UAntwerpen
Research group
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Record
Identifier
Creation 24.04.2024
Last edited 07.05.2024
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