Study on Composite Deterioration of Concrete and Crevice Corrosion of Pc Stranded Wire in Pretensioned I-Girders Bridge in Hokuriku District, Japan

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Key Points

The study aims to analyze the composite deterioration of concrete and the crevice corrosion of prestressed concrete (PC) strands in I-girders over 50 years.
Sampled cores from a bridge exposed to coastal salt for 50 years
Analyzed chloride ion concentration profiles
Used optical and electron microscopy to assess concrete condition
Investigated the relationship between concrete degradation and wire corrosion
Findings reveal advancing composite deterioration in concrete due to carbonation, chloride attack, and alkali-silica reaction
Identified ongoing crevice corrosion in PC stranded wires
Established correlations between types of concrete deterioration and observed wire corrosion patterns

Reports on concrete degradation and wire corrosion in a bridge, highlighting long-term salt exposure implications.

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NOMURA et al. (2026) studied this question.

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