Nondestructive Low-Temperature Cracking Characterization of Asphalt Materials
Publication: Journal of Materials in Civil Engineering
Volume 29, Issue 5
Abstract
An acoustic-emission approach to evaluate the low-temperature cracking performance of asphalt binders is presented. The acoustic activity of a thin film of asphalt binder bonded to a granite substrate is monitored while the layer is exposed to decreasing temperatures from around 20°C to approximately . Results of eight different asphalt binders at three different aging levels, i.e., unaged (TANK), short-term aged (RTFO), and long-term aged (PAV), are presented. The acoustic emission (AE) embrittlement temperatures are found to be sensitive to binder type as well as binder aging level. Results show that for most binders, their AE-based embrittlement temperature is a few degrees lower than their bending beam rheometer (BBR) critical cracking temperatures.
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Acknowledgments
This paper is based on work supported by the NCHRP Innovations Deserving Exploratory Analysis (IDEA) program under Project 144, An Acoustic Emission-Based Test to Determine Asphalt Binder and Mixture Embrittlement Temperature. The authors thank both the NCHRP-IDEA program manager, Dr. Inam Jawed, and the technical review panel chair, Michael Sprinkle, of the Virginia Transportation Research Council, for their support.
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Published In
Journal of Materials in Civil Engineering
Volume 29 • Issue 5 • May 2017
Copyright
©2016 American Society of Civil Engineers.
History
Received: Jun 16, 2016
Accepted: Sep 19, 2016
Published online: Nov 28, 2016
Discussion open until: Apr 28, 2017
Published in print: May 1, 2017
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