Effects of Epoxy Resin Content on Properties of Hot Mixing Epoxy Asphalt Binders
Publication: Journal of Materials in Civil Engineering
Volume 34, Issue 7
Abstract
Hot-mix epoxy asphalt has superior performance as bridge deck pavement material. However, its high cost hinders the application of epoxy asphalt in road pavement. This study investigated the effects of epoxy resin contents on epoxy asphalt performance, aiming to seek out a cost-effective proportion. Specifically, the macromechanical properties, chemical compositions, and microstructure transformation of epoxy asphalt were evaluated by a tensile and viscosity test, Fourier transform infrared spectroscopy (FTIR) test, and fluorescence microscopy test, respectively. Finally, a brief cost analysis was conducted. Results indicate that when the epoxy resin content exceeds or equals 40%, both tensile strength and elongation of epoxy asphalt meet the performance requirements regulated in the specification. In addition, the enhanced epoxy resin content may also boost the viscosity-increasing rate of epoxy asphalt, especially at high temperatures. Furthermore, the areas of 1,085, 1,108, and wavenumbers of epoxy asphalt infrared spectrum demonstrate good positive correlations with the epoxy resin contents. Besides, according to the fluorescence microscopy test result, after the curing process, the initial spherical epoxy resin particles tend to agglomerate, and a cross-linked spatial structure may form when the epoxy resin content exceeds or equals 40 wt%. Finally, combining the performance and cost analysis, the 40 wt% epoxy resin content can achieve a good balance between the material cost and pavement performance.
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Data Availability Statement
All data and codes generated or used during this study appear in the published article.
Acknowledgments
This work was undertaken with funding from the National Key Research and Development Project (No. 2019YFE0116300) and the Transportation Science Research Project of Jiangsu Province (No. 2019Y69), sponsored by the Postgraduate Research & Practice Innovation Program of Jiangsu Province (No. KYCX20_0134). The opinions, findings, and conclusions expressed in this publication are those of the authors and not necessarily those of any organization.
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Published In
Journal of Materials in Civil Engineering
Volume 34 • Issue 7 • July 2022
Copyright
© 2022 American Society of Civil Engineers.
History
Received: Apr 4, 2021
Accepted: Oct 27, 2021
Published online: Apr 25, 2022
Published in print: Jul 1, 2022
Discussion open until: Sep 25, 2022
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