Study of the Properties of Waterborne Epoxy Resin Emulsified Asphalt and Its Modification Mechanism
Publication: Journal of Materials in Civil Engineering
Volume 35, Issue 6
Abstract
Waterborne epoxy resin (WER) emulsified asphalt (WEREA) has the advantages of high viscosity and strength of epoxy asphalt, as well as a simple construction process, so it is used widely in asphalt pavement maintenance and repair projects. This paper investigated the comprehensive properties, the microstructure, the modification mechanism, and the strength formation mechanism of WEREA. The results of bond strength tests, adhesion tests between emulsified asphalt and coarse aggregate, conventional performance tests, and multistress creep recovery (MSCR) tests showed that with the increase of WER content, the adhesive properties and creep recovery properties at high temperature of the WEREA gradually improved, and gradually became the properties of brittle materials. When the WER content was 15%, the irrecoverable creep compliance of the WEREA stabilized and it met heavy traffic demand. In addition, fluorescence microscopy (FM) and scanning electron microscopy (SEM) showed that WER changed from having an island structure to having an epoxy skeleton structure in the WEREA. The results of Fourier-transform infrared (FTIR) testing showed that during the modification of the emulsified asphalt by the WER, no new substances were generated, which indicated that the sample possessed the mechanism of intermolecular physical blending. The test results were used to analyze the strength formation process of WEREA, which provides theoretical guidance for other researchers to study WEREA.
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Data Availability Statement
Some or all data, models, or code generated or used during the study are available from the corresponding author by request.
Acknowledgments
The work is supported by Chongqing Science and Technology Commission project (Grant No. cstc2019jcyj-msxmX0763) and the Construction Science and Technology Project of Ministry of Transport (Program No. 2014318346140). That sponsorship and interest are gratefully acknowledged.
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Published In
Journal of Materials in Civil Engineering
Volume 35 • Issue 6 • June 2023
Copyright
© 2023 American Society of Civil Engineers.
History
Received: Apr 1, 2022
Accepted: Oct 20, 2022
Published online: Mar 31, 2023
Published in print: Jun 1, 2023
Discussion open until: Aug 31, 2023
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