Effect of Waterborne Epoxy Resin on Properties of Modified Emulsified Asphalt and Its Microstructure
Publication: Journal of Materials in Civil Engineering
Volume 33, Issue 8
Abstract
The object of this research was to study the influence of waterborne epoxy resin on the properties of emulsified asphalt and its microstructure. First, the proportions of curing agent and waterborne epoxy resin were determined based on the test results of three indexes. Then, modified emulsified asphalt emulsion samples with different waterborne epoxy resin contents were prepared. The evaporation residues of the modified emulsified asphalt samples were subjected to the three index tests, dynamic shear rheological (DSR) test, bending beam rheometer (BBR) test, and pullout test. In addition, the performance parameters of the waterborne-epoxy-resin modified emulsified asphalt were compared with those of the neat asphalt and the emulsified asphalt. Last, the microstructures of the modified emulsified asphalt samples were studied with scanning electron microscopy (SEM). The test results indicated that the optimal curing agent to waterborne epoxy resin ratio was . As the waterborne epoxy resin content increased, the softening point of the evaporation residue of the modified emulsified asphalt samples increased and penetration decreased. The ductility suddenly decreased. The addition of waterborne epoxy resin significantly improved the high-temperature performance and bond behavior of the modified emulsified asphalt. However, its low-temperature performance deteriorated. The results of the microstructure analysis indicated that when the waterborne epoxy resin content was 10%, the waterborne epoxy resin was more evenly distributed throughout the modified emulsified asphalt. The comprehensive properties of the waterborne-epoxy-resin modified emulsified asphalt were superior to those of neat asphalt and emulsified asphalt.
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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 authors appreciate the support of the National Natural Science Foundation of China (Grant No. 51978086) and the National Natural Science Foundation of China (Grant No. 50878032).
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Information & Authors
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Published In
Journal of Materials in Civil Engineering
Volume 33 • Issue 8 • August 2021
Copyright
© 2021 American Society of Civil Engineers.
History
Received: Apr 20, 2020
Accepted: Dec 10, 2020
Published online: May 22, 2021
Published in print: Aug 1, 2021
Discussion open until: Oct 22, 2021
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