SYMPOSIA PAPER Published: 01 January 1992
STP19774S

Bond Loss Between Epoxy and Alkyd Coated Reinforcement Rebars and Concrete

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Organic coatings are increasingly being used to control corrosion of reinforcing bars but relatively little importance has been given to their effect on the mechanical properties of reinforced concrete elements. This study evaluates the bond loss of coated rebars with respect to uncoated rebars using pull-out tests on 0.15 m× 0.30 m. cylinders and in 0.66 m (length) × 0.15 m (width) × 0.20 m. (height) beams. Three thicknesses of epoxy coatings were tested in both, cylinders and beams. Six thicknesses of alkyd coatings were tested only in cylinders. There were also tests on cylinders and beams with uncoated rebars. Average losses of bond strength for #3 and #4 bar sizes with respect to the uncoated ones were, respectively, 13% and 15% for beams, 25% and 27% for cylinders using epoxy coatings and, 29% and 35% for cylinders using alkyd paints.

Author Information

Maldonado, LA
Centro de Investigación y de Estudios Avanzados, Mérida, Yucatán, México
Castro, P
Centro de Investigación y de Estudios Avanzados, Mérida, Yucatán, México
Marrufo, JH
Universidad Autónoma de Yucatán, Mérida, Yucatán, México
González, W
Universidad Autónoma de Yucatán, Mérida, Yucatán, México
Zapata, A
Universidad Autónoma de Yucatán, Mérida, Yucatán, México
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Details
Developed by Committee: G01
Pages: 372–385
DOI: 10.1520/STP19774S
ISBN-EB: 978-0-8031-5197-0
ISBN-13: 978-0-8031-1432-6