Thermal Effect on Rheological Properties of Epoxy Asphalt Mixture and Stress Prediction for Bridge Deck Paving
Publication: Journal of Materials in Civil Engineering
Volume 31, Issue 10
Abstract
Epoxy asphalt mixture has been widely used as an excellent paving material on long-span steel bridges; however, low-temperature cracking is a significant concern for paving on an orthotropic steel deck. Analysis of low-temperature thermal stress can be a challenge owing to the varying modulus of epoxy resin asphalt mixture at different temperatures. This paper presents an investigation into the rheological behaviors and models for epoxy resin asphalt mixture under different temperatures. Bending creep tests were conducted in a range of temperatures from 10°C to 60°C, and creep compliance curves were obtained. Based on the test results, five succinct but practical viscoelastic models were used for creep modeling, and parameters corresponding to different temperatures were obtained. Using a numerical approach, the creep compliance results were converted into master curves of relaxation modulus, and then the low-temperature thermal stress was calculated for the pavement layer. The experimental and simulation results indicated that the modified second-order extensive Kelvin model could be used to describe creep performance very well for epoxy resin asphalt mixture in a wide range of temperatures, and epoxy asphalt is highly adaptable to a cold working environment when used as the paving layer of steel bridge decks.
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Acknowledgments
The support of the CCCC Highway Consultants Co. is gratefully acknowledged.
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Published In
Journal of Materials in Civil Engineering
Volume 31 • Issue 10 • October 2019
Copyright
©2019 American Society of Civil Engineers.
History
Received: Nov 21, 2018
Accepted: Apr 11, 2019
Published online: Jul 25, 2019
Published in print: Oct 1, 2019
Discussion open until: Dec 25, 2019
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