Fire Resistance of Strengthened RC Members Using NSM CFRP Bars with a Cladding Layer
Publication: Journal of Composites for Construction
Volume 23, Issue 1
Abstract
Adhesives are fundamental materials in reinforced concrete (RC) members. Depending on the type of adhesive, the fire resistance of these members will vary. However, previous studies have focused on organic adhesives, although inorganic adhesive and hybrid organic-inorganic configurations may provide certain advantages. In the research presented in this paper, the mechanical properties of carbon fiber-reinforced polymer (CFRP) bars with an inorganic mortar cladding layer were studied experimentally. Then, fire tests were conducted on near-surface-mounted (NSM) CFRP-strengthened RC beams. The results indicated that the bars still exhibited satisfactory mechanical properties after high-temperature exposure due to the protection of the inorganic mortar cladding layer. The fire resistance of RC beams filled with fiber polymer mortar was better than that of RC beams filled with modified acrylic emulsion mortar. The hybrid organic-inorganic configurations in the NSM FRP-strengthened RC structures were feasible. Considerable fire resistance may be achieved without applying fire protection along the entire length of the beam.
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Acknowledgments
The authors would like to acknowledge financial support from the National Natural Science Foundation of China (Grant Nos. 51478106 and 51525801), as well as National Key Research and Development Program of China (Grant No. 2017YFC0703000), as well as the Postgraduate Research & Practice Innovation Program of Jiangsu Province (Grant No. KYCX18_0111).
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Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 23 • Issue 1 • February 2019
Copyright
©2018 American Society of Civil Engineers.
History
Received: May 28, 2017
Accepted: Jun 13, 2018
Published online: Oct 16, 2018
Published in print: Feb 1, 2019
Discussion open until: Mar 16, 2019
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