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Options for inhibiting corrosion in concrete bridges

From National Research Council Canada

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Affiliation
  1. National Research Council of Canada. NRC Institute for Research in Construction
FormatText, Article
Subjectcorrosion, concrete bridges, reinforcement; Corrosion (of reinforced concrete); Admixtures; Corrosion/cracking
Abstract
Highway bridges are critical structures and should be kept safe and serviceable for a long period of time. About 50 per cent of bridges are made of reinforced or prestressed concrete 1 , and extensive bridge deterioration due to corrosion can affect their safety and serviceability, resulting in loss of life or injury, traffic disruption and high user costs. The pore solution in a hydrated Portland cement system in concrete bridges is highly alkaline, with a pH normally exceeding 12.6. In this environment, steel is ispassivelt and a thin but dense protective oxide film is formed on its surface. The surrounding concrete restricts ingress ofcarbon dioxide and chlorides. Consequently, good-quality, well-placed concrete with adequate cover over the steel provides a high degree of protection against corrosion of the steel reinforcement.
Publication date
In
  • Construction Canada 43, no. May 3 (1 May 2001): 24–26.
LanguageEnglish
Peer reviewedNo
NRC numberNRCC 44757
NRC-IRC-10300
NPARC number20378528
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Record identifier81f14f98-7223-498a-a621-b671ca88eb54
Record created2012-07-24
Record modified2020-03-27
Date modified: