Bond of Epoxy-Coated Reinforcement: Bar Parameters

Abstract

The effects of coating thickness, deformation pattern, and bar size on the reduction in bond strength between reinforcing bars and concrete caused by epoxy coating are described. Tests include beam-end and splice specimens containing No.5, 6, 8, and 11 bars with average coating thicknesses ranging from 3 to 17 mils (0.08 to 0.43 mm). Three deformation patterns are evaluated. All bars are bottom~cast. Beam-end specimens have covers of two bar diameters, while splice specimens have covers that depend on bar size and are less than 2 bar diameters.