Mechanical Properties of Corrosion-Damaged Reinforcement

ABOUT THE INTERNATIONAL CONCRETE ABSTRACTS PORTAL

  • The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.

International Concrete Abstracts Portal

  


Title: Mechanical Properties of Corrosion-Damaged Reinforcement

Author(s): John Cairns, Giovanni A. Plizzari, Yingang Du, David W. Law, and Chiara Franzoni

Publication: Materials Journal

Volume: 102

Issue: 4

Appears on pages(s): 256-264

Keywords: corrosion; ductility; reinforcement

Date: 7/1/2005

Abstract:
Corrosion of embedded reinforcement is the most prevalent form of degradation of reinforced concrete structures, and may impair structural capacity through loss of bar section, loss of bond between reinforcement and concrete as a result of longitudinal cracking, or loss of concrete cross section. The effect of corrosion attack on mechanical properties of reinforcement is investigated through physical tests on bars with simulated and real corrosion damage and through a simple numerical model. Bars subjected to local or pitting attack may suffer a relatively modest loss of strength but a significant loss of ductility, and this is related principally to the variability of attack along the length of the bar. The numerical model supplements experimental work through a parametric study on the influence of steel characteristics. Finally, guidelines on assessment are suggested that are derived from results reported in the paper and from elsewhere in the published literature.