Comparison between ASTM D7205 and CSA S806 Tensile-Testing Methods for Glass Fiber–Reinforced Polymer Bars
Publication: Journal of Composites for Construction
Volume 21, Issue 5
Abstract
The standards ASTM D7205/D7205M-06 and CSA S806 contain the commonly used test methods for characterizing the tensile properties of glass fiber–reinforced polymer (GFRP) bars for use as reinforcement in concrete structures. These standards, however, use different anchor dimensions and loading rates, thereby possibly yielding different properties for the same type of fiber-reinforced polymer (FRP) bars. This paper assessed the results of a four-laboratory testing program comparing the sample preparation methods and test results according to ASTM D7205 and CSA S806. Each laboratory tested at least 10 samples prepared according to the recommendations in Annex A of the ASTM standard and Annex B of the Canadian Standards Association (CSA) standard. Each type of sample was prepared by a single laboratory to minimize variation among the test specimens. The results show a statistically significant difference between the tensile strength measured by using the CSA and ASTM provisions. Regardless of specimen preparation, the modulus of elasticity of the GFRP bars was the same with both test standards, but the ASTM standard returned a wider variation than did the CSA.
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Acknowledgments
This study was conducted with funding from the Natural Sciences and Engineering Research Council of Canada (NSERC) Research Chair in Innovative FRP Reinforcement for Concrete Infrastructure, the Fonds de recherche du Québec en nature et technologie (aFRQ-NT), and the Service des matériaux d’infrastructures of the Ministry of Transportation of Québec. The authors wish to express their gratitude and appreciation to Pultrall, Inc., Thetford Mines, Quebec, for material support. The technical assistance from the staff of the Structural Laboratory in the Department of Civil Engineering, Faculty of Engineering at the University of Sherbrooke, is also acknowledged. The fourth author also acknowledges the scholarship granted by the Australian Government Endeavour Research Fellowships to undertake his research and professional development at the University of Sherbrooke.
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Published In
Journal of Composites for Construction
Volume 21 • Issue 5 • October 2017
Copyright
©2017 American Society of Civil Engineers.
History
Received: Sep 14, 2016
Accepted: Feb 22, 2017
Published online: May 19, 2017
Published in print: Oct 1, 2017
Discussion open until: Oct 19, 2017
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