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Non-destructive Test Methods for Corrosion Detection in Reinforced Concrete Structures

Abstract

Several inspection methods can be used to assess the corrosion state of steel reinforcement in concrete. Especially for periodical field surveys and monitoring, non-destructive testing (NDT) methods are to be preferred as they do not cause any or very limited damage to the existing concrete. In this paper, the corrosion state of three reinforced concrete beams exposed to marine environment for 25 years was evaluated by measuring three parameters; electrochemical potential, concrete resistivity and corrosion rate. The measurements were performed with commercial devices. It was found that all devices are applicable for field inspections. Among the methods selected for the study, the electrochemical potential measured in a fine grid and analysed statistically offered the best possibility of evaluating the corrosion state; preferably in combination with selected excavations for determination of the level of corrosion.
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Category

Academic article

Language

English

Author(s)

Affiliation

  • SINTEF Community / Architecture, Materials and Structures
  • Norwegian University of Science and Technology
  • Norwegian public roads administration

Year

2020

Published in

Nordic Concrete Research

ISSN

0800-6377

Volume

62

Issue

1

Page(s)

41 - 61

View this publication at Norwegian Research Information Repository