Abstract
Prefabricated epoxy-coated reinforcement is receiving greater usage in reinforced concrete construction where high corrosion resistance is required. Epoxy coating is known to reduce bond strength between reinforcement and concrete. In some tests, it has been found that bond strength decreases as coating thickness increases. This study reports on beam-end tests that were carried out on uncoated bars, bars with green epoxy coating, and prefabricated (gray) epoxy coating. Results revealed that epoxy coating reduces bond strength, with similar reductions for green and gray coatings. While in some cases, bond strength decreased with increasing coating thickness, given the range of thicknesses investigated, the reduction factor of current building codes was found to be conservative. The study provides evidence that larger coatings can be permitted without penalty on development or splice length.
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