Influence of Pore Structure on Mechanical Behavior of Concrete under High Strain Rates
Publication: Journal of Materials in Civil Engineering
Volume 28, Issue 2
Abstract
Properties of a porous material such as concrete are strongly dependent on its pore structure features. This study deals with developing an understanding of the material structure-compressive response relationships in concrete under high strain rates. Concrete specimens with different pore structures were proportioned and subjected to quasi-static and dynamic compression tests. This experimental investigation uses split Hopkinson pressure bar (SHPB) to achieve high strain rates. A mercury-intrusion porosimetry (MIP) investigation was carried out to examine the pore structure of concrete. Experiments indicate that the compressive behavior of concrete varies with strain rate and pore structure. The compressive stress-strain response of concrete under high strain rates, a model to predict the stress-strain response, and its relationship to pore structure features are outlined.
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Acknowledgments
Financial support for this research was provided by the Fundamental Research Funds for the Central Universities (2014B12414). The authors would like to express their gratitude to the reviewers and editors for their helpful comments.
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Published In
Journal of Materials in Civil Engineering
Volume 28 • Issue 2 • February 2016
Copyright
© 2015 American Society of Civil Engineers.
History
Received: May 3, 2014
Accepted: May 19, 2015
Published online: Jul 16, 2015
Discussion open until: Dec 16, 2015
Published in print: Feb 1, 2016
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