Experimental Study on Dynamic Tensile Strength of Cement Mortar Using Split Hopkinson Pressure Bar Technique
Publication: Journal of Materials in Civil Engineering
Volume 26, Issue 6
Abstract
The dynamic characterization of cement-based materials under high strain rates is fundamental to understand the material behavior in case of heavy earthquakes and dynamic events. Abram’s law, which was originally formulated for cement-based materials under static loading, is not directly applicable to the dynamic loading condition. In this paper, a modified relationship has been proposed to evaluate the tensile strength of cement mortar. An extensive experiment was carried out to determine the effect of strain rate and water-to-cement () ratio on tensile strength of cement mortar. The dynamic characterization of tensile strength has been carried out by the split Hopkinson pressure bar at high strain rates. The results of the tests show a significant strain rate–sensitive behavior, exhibiting dynamic tensile strength of cement mortar increases with an increase in strain rate. The influence of ratio on dynamic increase factor is minor.
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Acknowledgments
Financial support for this research was provided by the National Natural Science Foundation of China (Grant No. 51178162) and the Fundamental Research Funds for the Central Universities (Grant No. 2013B05514). The authors would like to express their gratitude to the editors and reviewers for their helpful comments.
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Published In
Journal of Materials in Civil Engineering
Volume 26 • Issue 6 • June 2014
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Dec 12, 2012
Accepted: Aug 22, 2013
Published online: Aug 27, 2013
Published in print: Jun 1, 2014
Discussion open until: Aug 10, 2014
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