An Experiment on Bond-Slip Behavior of Epoxy Coated Rebar Made by IGBT Method

Jee Sang Kim; Sang Hyun Lee; Jung Wook Choi

doi:10.4028/www.scientific.net/DDF.382.241

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HomeDefect and Diffusion ForumDefect and Diffusion Forum Vol. 382An Experiment on Bond-Slip Behavior of Epoxy...

An Experiment on Bond-Slip Behavior of Epoxy Coated Rebar Made by IGBT Method

Abstract:

Epoxy coated reinforcements have been used extensively in bridge decks and substructures to protect against corrosion brought on by de-icing salts or marine environments. They need longer development lengths because of poor bond to concrete and special treatments on sites due to vulnerability of damage during transportation, storage and bending process. A new method of pre-heating of reinforcement before coating process using an IGBT(Insulated Gate Bipolar Transistor) control was applied to improve the bond of epoxy coating to reinforcements. In this paper, the bond-slip properties of newly developed epoxy coated bars are investigated and compared to those of black bars. The direct pull out test according to EN Standard was used with varying the diameters of reinforcements. The experimental results show that the new process is very efficient in increasing bond capacity of epoxy coated bars to concrete comparing those of traditional ones.

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Periodical:

Defect and Diffusion Forum (Volume 382)

Pages:

241-245

DOI:

https://doi.org/10.4028/www.scientific.net/DDF.382.241

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Online since:

January 2018

Authors:

Jee Sang Kim*, Sang Hyun Lee, Jung Wook Choi

Keywords:

Bond Strength, Bond-Slip, Epoxy-Coated Reinforcement, IGBT Controls

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