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http://dx.doi.org/10.14190/JRCR.2019.7.3.271

Bond Behavior of Epoxy Coated Reinforcement Using Direct Pull-out Test and Beam-End Test  

Kim, Jee-Sang (Department of Civil Engineering, Seokyeong University)
Kang, Won Hyeak (Department of Urban Infrastructure and Disaster Prevention Engineering, Seokyeong University)
Publication Information
Journal of the Korean Recycled Construction Resources Institute / v.7, no.3, 2019 , pp. 271-278 More about this Journal
Abstract
The corrosion of reinforcements embedded in concrete causes severe deterioration in reinforced concrete structures. As a countermeasure, epoxy coated reinforcements are used to prevent corrosion of reinforcements. When epoxy coated bars are used, the resistance of corrosion is excellent, but epoxy coating on the bars have a disadvantage of reduction in bond capacity comparing to that of normal bars. Therefore, it is necessary to confirm the bond performance of epoxy coated reinforcements through experimental and analytical methods. Bond behaviors of epoxy coated bars for various diameters of 13 and 19mm and thicknesses of cover concrete of 3 types(ratio of cover to bar diameter) are examined. As the diameters of the epoxy coated bars increase, the difference of bond strength between epoxy coated and uncoated bars also increases and damage patterns showed pull out failure. In addition, finite element analysis was performed based on the bond-slip relationship obtained by direct pullout test and compared with the flexural test results. It is considered that flexural member test is more useful than pullout test for simulating the behavior of actual structure.
Keywords
Epoxy coated bar; Bond-slip behaviour; Direct pull-out test; Beam-end test; Bond stress;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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