Abstract
This study investigates the effect of chemical degradation on the residual mechanical properties of ultrahigh performance fiber-reinforced concrete (UHPFRC) after temperature exposure ranging from 100 to 900°C. Emphasis has been placed on the isolation of chemical degradation. A long drying period and a slow heating rate were used to minimize the buildup of excessive pore pressure caused by water evaporation and transport constraints. To identify critical areas of chemical degradation, differential scanning calorimetry and thermo gravimetric analysis were performed. The results were used in correlation with existing research to aid in deriving a simplified model for predicting the temperature-dependent stress versus strain behavior of UHPFRC.
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Acknowledgments
This work was supported by a research grant from the Department of Homeland Security and by the University of Connecticut. The writers would also like to acknowledge the following companies for providing material at no cost: Bekaert, Chryso Inc., Holcim (U.S.) Inc., Elkem Materials, Lehigh White Cement Company, and Lafarge North America. The opinions expressed in this paper are those of the writers and do not necessarily reflect the views of the sponsors.
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Published In
Journal of Materials in Civil Engineering
Volume 28 • Issue 4 • April 2016
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Sep 23, 2014
Accepted: Jun 23, 2015
Published online: Oct 9, 2015
Discussion open until: Mar 9, 2016
Published in print: Apr 1, 2016
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