Characterization of Cement Asphalt Mortar for Slab Track by Dynamic Mechanical Thermoanalysis
Publication: Journal of Materials in Civil Engineering
Volume 28, Issue 3
Abstract
Cement emulsified asphalt (CA) mortar is a key engineering material for ballastless slab tracks of high speed rail (HSR) and has a wide range of asphalt to cement (A/C) mass ratios. Depending on the A/C ratio, CA mortar may be composed of either cement-based or asphalt-based materials. In this paper, based on typical field service conditions of CA mortar of HSR and the characteristics of CA mortar, the testing conditions of dynamic mechanical thermoanalysis (DMTA) for CA mortar were determined, including by measuring the mode, specimen size, frequency, heating rate, and temperature range. Results show that DMTA characterized in this study indicates high repeatability and is an appropriate method for evaluating the thermodynamic mechanical properties of CA mortar. The vibration damping ability of CA mortar increases with an increase in asphalt content within a temperature range of ( to 60°C).
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Acknowledgments
Special thanks go to the reviewers for their valuable suggestions. This work was supported by the National Natural Science Foundation of China (Grants 50878209 and 51208515) and the National Basic Research Program of China (“973” Program) (Grant 2013CB036201).
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Published In
Journal of Materials in Civil Engineering
Volume 28 • Issue 3 • March 2016
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Jul 15, 2014
Accepted: Jun 23, 2015
Published online: Sep 22, 2015
Discussion open until: Feb 22, 2016
Published in print: Mar 1, 2016
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