Behavior of RC Beams Retrofitted with CARDIFRC after Thermal Cycling
Publication: Journal of Materials in Civil Engineering
Volume 22, Issue 1
Abstract
This study investigates the effect of thermal cycling on the performance of concrete beams retrofitted with CARDIFRC, a new class of high performance fiber-reinforced cement-based material that is compatible with concrete. Twenty four beams were subjected to 24 h thermal cycles between and . One third of the beams were reinforced either in flexure only or in flexure and shear with conventional steel reinforcement and used as control specimens. The remaining sixteen beams were retrofitted with CARDIFRC strips to provide external flexural and/or shear strengthening. All beams were exposed to a varied number of 24 h thermal cycles ranging from 0 to 90 and were tested in four-point bending at room temperature. The tests indicated that the retrofitted members were stronger and stiffer than control beams, and more importantly, that their failure initiated in flexure without any signs of interfacial delamination cracking. The results of these tests are presented and compared to analytical predictions. The predictions show good correlation with the experimental results.
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 22 • Issue 1 • January 2010
Pages: 21 - 28
Copyright
© 2010 ASCE.
History
Received: Aug 6, 2008
Accepted: Apr 22, 2009
Published online: Apr 24, 2009
Published in print: Jan 2010
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