Abstract
An indirect electrochemical impedance spectroscopy method, previously applied to corrosion detection in reinforced concrete structures, was explored as a potential nondestructive method for detecting corrosion of steel in post-tensioned tendons used as reinforcing structural elements in segmental bridge construction. A proof of concept is demonstrated by experiments performed on tendons with passive and corroded strands and through finite-element simulations of the indirect impedance response. The numerical simulations, used to explore the influence of non-uniform current distributions on the indirect impedance response, demonstrate how frequency dispersion influences the impedance measurement. Validation of the model is shown through comparison to experimental measurements.
Published Version
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