Viscoelastic Characterization of Asphalt Concrete in Diametral Tension-Compression
Publication: Journal of Materials in Civil Engineering
Volume 28, Issue 1
Abstract
This work focuses on improving the linear viscoelastic characterization of asphalt concrete materials with a standard indirect tension setup. Three main aspects distinguish this investigation from typical efforts. First, the applied diametral force history consisted of load–unload–rest sequences; this was done to enable separation between recoverable and irrecoverable deformation components. Second, viscoelastic properties were essentially calibrated against the recoverable deformation part to guarantee agreement with the sought constitutive theory; response during rest intervals was modeled for this purpose, assuming inactivity of the irrecoverable deformation part. Third, diametral forces were alternated between tension and compression; this was done to restrain the accumulation of irrecoverable deformation and to widen the calibration domain. Detailed step-by-step guidelines are included and applied to clarify the approach. For pavement engineering purposes, the overall scheme is deemed an improvement over common or existing methods.
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Acknowledgments
This work was sponsored by Netivei Israel, the national roads company of Israel. It is part of a larger research project carried out by the Transportation Infrastructure Laboratory in the Technion, aimed at introducing warm mix technologies into the country in a controlled and systematic manner. Mr. Nir Michaeli is acknowledged for his help with IDT specimen fabrication and testing. Thanks are due also to Mr. Shmuel Vertzberger for his help with ANSYS modeling. The experimental assistance of Mr. Meir Ovadia is also acknowledged.
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 28 • Issue 1 • January 2016
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Jun 10, 2014
Accepted: Mar 27, 2015
Published online: May 20, 2015
Discussion open until: Oct 20, 2015
Published in print: Jan 1, 2016
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