Comparison of Fracture Properties of Asphalt Concrete in Semicircular Bend Test Using Noncontact Camera and Crosshead Movement
Publication: Journal of Materials in Civil Engineering
Volume 30, Issue 6
Abstract
The semicircular bend (SCB) test has received much attention in recent years. The test is quick, indicative, and has reasonable variability compared with other fracture property tests for asphalt concrete (AC) mixtures. The crack propagation in the test is calculated indirectly using the crosshead movement (CHM) or crack mouth opening (CMO). Although these methods might correlate well to the crack propagation, little research has been done to ascertain this relationship. The main objective of this study is to compare the SCB test using a noncontact camera (NCC) and CHM. A comprehensive comparison of fracture properties of six AC mixtures captured by these two methods is conducted. The critical strain energy () and () values for AC mixtures are determined. There is a strong correlation between from SCB NCC and from SCB CHM, and between from SCB NCC and from SCB CHM. The results of this study indicate that the SCB CHM test has great potential as a quality assurance/quality control (QA/QC) test of fracture properties of asphalt mixtures.
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Acknowledgments
The authors would like to thank the United States Department of Transportation, the California Department of Transportation, and METRANS for their interest and provision of grant support to make this study possible. The contents of this paper reflect the views of the authors, who are responsible for the facts and accuracy of the data presented herein. The contents do not necessarily reflect the official views or polices of the State of California or the Federal Highway Administration.
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Information & Authors
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Published In
Journal of Materials in Civil Engineering
Volume 30 • Issue 6 • June 2018
Copyright
©2018 American Society of Civil Engineers.
History
Received: May 21, 2017
Accepted: Nov 6, 2017
Published online: Mar 16, 2018
Published in print: Jun 1, 2018
Discussion open until: Aug 16, 2018
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