Field performance of corrosion inhibiting systems in reinforced concrete bridge barrier walls

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ConferenceFourth International Conference on Concrete Under Severe Conditions: Environment and Loading: 27 June 2004, Seoul, Korea
Pages14231430; # of pages: 8
SubjectCorrosion (of reinforced concrete); Admixtures; Corrosion/cracking
AbstractCorrosion inhibitors have been considered as one of the most effective solutions to address the problem of corrosion of steel reinforcement in concrete structures. However, limited information is available on their actual field performance and cost-effectiveness. In this study, the field performance of nine commercially available corrosion-inhibiting systems for use in concrete were assessed on a newly reconstructed barrier wall on the Vachon Bridge near Montreal. These corrosion-inhibiting systems included concrete admixtures, reinforcing steel coatings, and/or concrete surface coatings/sealers. Special rebar ladders were embedded in the barrier wall to provide different thicknesses of the concrete cover for accelerated corrosion and rapid evaluation of the performance of the applied corrosion-inhibiting systems. On-site corrosion surveys, including half-cell potential and corrosion rate measurements, along with concrete coring were conducted yearly. Electrochemical tests on the performance of corrosion-inhibiting systems were also carried out in the laboratory. The results indicate that the system containing the inorganic-based admixture performed better than the other systems in delaying and/or reducing the corrosion of reinforcement in the concrete barrier wall.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number46436
NPARC number20378777
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Record identifier1d38d990-034b-4fb2-b81d-12aa6a8769a7
Record created2012-07-24
Record modified2016-05-09
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