MATEC Web Conf.
Volume 271, 20192019 Tran-SET Annual Conference
|Number of page(s)||5|
|Section||Asphalt Concrete Materials|
|Published online||09 April 2019|
Nanoscale Quantification of Moisture Susceptibility of Paving Asphalts
College of Engineering, Arkansas State University, 504 University Loop, ABI-233W, State University, Jonesboro, AR 72467, USA
2 College of Engineering, Arkansas State University, PO Box 1740, LSW#246, State University, Jonesboro, AR 72467, USA
* Corresponding author: firstname.lastname@example.org
Moisture-induced damage due to stripping is one of the major concerns to the highway agencies in recent years. In this study, nanoscopic investigations were carried out to examine the effects of moisture in asphalt binders. An Atomic Force Microscope (AFM) was used to estimate the asphalt binder’s modulus and adhesion values, which were believed to be indicators of binder’s resistance to moisture damage. To this end, two Performance Grade (PG) binders and their modified counterparts using polyphosphoric acid (PPA), styrene-butadiene-styrene (SBS), and SBS plus PPA were tested in this study. Test results show significant reductions of adhesion and modulus values after water immersion of the asphalt binders. AFM data also reveals that SBS-modified binders exhibit better moisture resistance compared to the base binder. Findings of this study are expected to help transportation professionals to achieve a better understanding of moisture damage of asphalt binders at a molecular level and their suitability in pavements.
© The Authors, published by EDP Sciences, 2019
This is an open access article distributed under the terms of the Creative Commons Attribution License 4.0 (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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