Evaluation of corrosion of reinforcement in repaired concrete

  1. (PDF, 299 KB)
AuthorSearch for: ; Search for:
Conference9th International Conference and Exhibition, Structural Faults and Repair 2001: 04 July 2001, London, U.K.
Pages112; # of pages: 12
Subjectcorrosion, reinforcement, concrete; Corrosion (of reinforced concrete)
AbstractCorrosion of steel in concrete is a complex phenomenon affected by many environmental factors. Areliable and effective non-destructive approach for assessing and predicting the state of reinforcementcorrosion in concrete has not yet been developed. Current methods do not account for the effects ofprevailing environmental conditions. Half-cell potential, linear polarization and concrete resistivitymeasurements are sensitive to the ambient environment, especially oxygen and water in concrete.Completely water-saturated concrete, for instance, can lead to oxygen starvation, resulting in corrosionpotential and current values that are lower than normally expected and provide, therefore, a poorprediction of the corrosion state. This paper presents the results of a study of the reinforcement corrosion in repaired concrete slabs taken from an old bridge in Hawkesbury, Ontario and additional results measured on electrochemical cells. Each corrosion measurement technique has its specific characteristics and limitations. The investigation showed that a better and more reliable prediction could be obtained by analyzing the data from above measurements jointly by considering the effects of environmental conditions.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number39305
NPARC number20378703
Export citationExport as RIS
Report a correctionReport a correction
Record identifier64db226b-39e1-4489-ac54-15dd8f7c2dd0
Record created2012-07-24
Record modified2016-05-09
Bookmark and share
  • Share this page with Facebook (Opens in a new window)
  • Share this page with Twitter (Opens in a new window)
  • Share this page with Google+ (Opens in a new window)
  • Share this page with Delicious (Opens in a new window)
Date modified: