Effect of Curing Reaction Behaviors of Warm Mix Epoxy Asphalt Concrete on Its Field Compaction Characteristics Using Discrete-Element Method
Publication: Journal of Materials in Civil Engineering
Volume 34, Issue 6
Abstract
The irreversible curing reaction of thermosetting epoxy asphalt mixture (EAM) brings challenges to the construction of epoxy asphalt concrete (EAC) on the steel bridge deck, and the curing reaction degree (CRD) of EAM before compaction has a great influence on the compaction quality. The objective of this study is to investigate the effects of excessive CRD condition and uneven CRD condition of warm mix EAC on its field compaction. To achieve this goal, a field compaction model for EAC on a steel bridge deck was developed using discrete-element method (DEM) first. In the DEM model, a two-stage contact model that combined Burges model with the parallel bond model was used to characterize the thermosetting and viscoelastic behaviors of EAM, and the values of the contact model’s parameters under different CRDs were determined by a trial calculation method based on Superpave gyratory compaction test. Subsequently, the field compaction process of cured EAM with different CRDs was simulated by changing the contact parameters’ value, and the effects of excessive CRD condition and uneven CRD condition on the compaction quality were analyzed. Results show that the highly cured EAM is hard to be compacted unless larger compaction loads are adopted in the repeated compaction. Uneven CRD of EAM is prone to generate the mixture agglomeration, and it has negative effects on the compaction quality of the surrounding EAM.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
This research was funded by Natural Science Foundation of Jiangsu Province (No. BK20200384). The authors are grateful for the financial support. Thanks also goes to the permissions of reprinted figures from Elsevier, ASTM, and ASCE publications.
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Published In
Journal of Materials in Civil Engineering
Volume 34 • Issue 6 • June 2022
Copyright
© 2022 American Society of Civil Engineers.
History
Received: Jul 19, 2021
Accepted: Sep 14, 2021
Published online: Mar 21, 2022
Published in print: Jun 1, 2022
Discussion open until: Aug 21, 2022
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