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Beam-End Bond Tests of Textured-Epoxy-Coated No. 6 Reinforcing Bars
Lepage, Andres
Lepage, Andres
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Abstract
In this study, the bond strength of No. 6 textured-epoxy-coated reinforcement (TECR)–epoxy-coated reinforcement with a texturing surface treatment material–is evaluated. The bond strength of the TECR, produced by Sherwin-Williams, is compared to that of uncoated reinforcement using beam-end tests performed in accordance with ASTM A944 and A1124 using six pairs of TECR and uncoated bar specimens. The TECR exhibited a bond strength equal to 100.3 percent of that of uncoated reinforcement from the same heat of steel. The difference in bond strength is not statistically significant. The test results can be used to develop bond qualification recommendations for reinforcing bars with textured coating to be incorporated in ASTM A1124. Based on these results, it is recommended that the required bond strength of TECR be increased from 96% to 99.5% of the bond strength of uncoated bars and that the textured coating be considered as providing bond strength equivalent to that of uncoated bars.
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Date
2025-02
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Publisher
University of Kansas Center for Research, Inc.
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Keywords
Beam-end test, Bond strength, Epoxy-coated reinforcement, Textured-epoxy-coated reinforcement, Uncoated reinforcement
Citation
Thapa, S., Darwin, D., O’Reilly, M., and Lepage, A., “Beam-End Bond Tests of Textured-Epoxy-Coated No. 6 Reinforcing Bars,” SL Report 24-1, University of Kansas Center for Research, Inc., Lawrence, KS, November 2024 (Updated February 2025), 14 pp.