Options for inhibiting corrosion in concrete bridges

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AuthorSearch for:
Journal titleConstruction Canada
IssueMay 3
Pages2426; # of pages: 3
Subjectcorrosion, concrete bridges, reinforcement; Corrosion (of reinforced concrete); Admixtures; Corrosion/cracking
AbstractHighway 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
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedNo
NRC number44757
NPARC number20378528
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Record identifier81f14f98-7223-498a-a621-b671ca88eb54
Record created2012-07-24
Record modified2016-05-09
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