Effect of Applied Loads on Water and Chloride Penetrations of Strain Hardening Cement-Based Composites
Publication: Journal of Materials in Civil Engineering
Volume 28, Issue 9
Abstract
Strain-hardening cement-based composites (SHCC) with polyvinyl alcohol (PVA) fibers have excellent tensile and bending behaviors; however, their water and aggressive ion penetrations should be considered carefully under applied load conditions because they can significantly influence the durability of SHCC. The goal of this study is to evaluate the effect of applied loads on water and chloride penetrations of SHCC. The capillary absorption test was respectively carried out under loading and after unloading, and then the water and chloride penetrations were evaluated. The results show that applied loads have a significant effect on penetrations, and the penetrations prove to rise with the increase of applied loads. Particularly, when a higher load is applied, water and chloride rapidly penetrate into SHCC. However, SHCC-W whose surface is processed with waterproofing agent, exhibits good penetration resistance. Due to the shrinkage stress induced by fibers in SHCC, the crack widths of SHCC after unloading are lower than those under loading, and the penetrations are thus supposed to decrease. The relationship between the applied load and water penetration of SHCC is established, which can be used for evaluating the durability of SHCC when considering the applied loading conditions.
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Acknowledgments
The authors wish to acknowledge the financial support from the National Natural Science Foundation of China (NSFC) (Project No: 50739001) and Chinese National 973 Plan (2015CB655100). Prof. F. H. Wittmann is highly acknowledged for his comments and suggestions.
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Published In
Journal of Materials in Civil Engineering
Volume 28 • Issue 9 • September 2016
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Aug 29, 2015
Accepted: Dec 16, 2015
Published online: Mar 23, 2016
Discussion open until: Aug 23, 2016
Published in print: Sep 1, 2016
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