<div class="csl-bib-body">
<div class="csl-entry">Dheeraj Adwani, Sreeram, A., Pipintakos, G., Mirwald, J., Yudi Wang, Ramez Hajj, Ruxin Jing, & Bhasin, A. (2023). Interpreting the effectiveness of antioxidants to increase the resilience of asphalt binders: A global interlaboratory study. <i>Construction and Building Materials</i>, <i>366</i>, Article 130231. https://doi.org/10.1016/j.conbuildmat.2022.130231</div>
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dc.identifier.issn
0950-0618
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/142225
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dc.description.abstract
The design and use of antioxidant additives to reduce or slow down the aging of asphalt binders can bring about
tremendous benefits to the asphalt industry. Despite many isolated and scattered research efforts showing mixed
results, the application of this science to engineering-based solutions has been limited due to variability in results
and conflicting data available. This work presents the results from a global interlaboratory study to test the
effectiveness of promising antioxidant additives, namely kraft lignin, calcium hydroxide, zinc diethyldithiocarbamate
and phenothiazine to increase the resilience of asphalt binders and provide insights towards
understanding the complex intricacies between chemistry and rheology. Specifically, seven different binders
from various geographical regions in the world i.e., Texas (USA), Vienna (Austria), Illinois (USA), Antwerp
(Belgium), and Delft (Netherlands) were blended with the antioxidants at two proportions. Subsequently, the
chemical and rheological properties of the blends were evaluated using Fourier transform infrared (FTIR)
spectroscopy and dynamic shear rheometer (DSR). The results indicate that although some antioxidants may
reduce oxidation based chemical indices, their effect on rheology is more complicated and possibly related to
unique physicochemical interactions in each binder. From a macro-perspective, zinc diethyldithiocarbamate
showed promising results with a good correlation between rheology and chemistry for the majority of the
binders. These additives or other additives with the same working principles should be investigated further.
Additionally, significant research efforts must also be directed towards approaches aimed at understanding
mechanisms of interaction and relating results with specific binder compositions.
en
dc.language.iso
en
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dc.publisher
ELSEVIER SCI LTD
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dc.relation.ispartof
Construction and Building Materials
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dc.subject
Oxidation
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dc.subject
Antioxidants
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dc.subject
Aging
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dc.subject
Binder Chemistry
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dc.subject
Resilience
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dc.title
Interpreting the effectiveness of antioxidants to increase the resilience of asphalt binders: A global interlaboratory study