Extending service life by coupling the limit state of corrosion initiation and corrosion induced cracking

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

    Abstract

    The service life design of reinforced concrete structures requires models capable of reliably describing both the mechanisms of damage and its progression over time. For concrete exposed to chlorides, service life design typically disregards the onset of damage, i.e. the progress of corrosion of the reinforcing steel. Common service life design practice typically considers the end of the initiation phase of the degradation process as the design limit state. A method is proposed where a model for estimating the time to corrosion initiation is coupled with a model for estimating the time to corrosion induced cracking into a single limit state determination. An example is provided of a structural element that has been designed for the serviceability limit state of corrosion induced concrete cover cracking. The results show that the corrosion rate is a major factor for the coupled service life determination. Where fast corrosion is expected, service life extension is insignificant, and where slow corrosion rates are expected, service life extension can be significant.
    Original languageEnglish
    Title of host publicationXXIIIth Symposium on Nordic Concrete Research
    Subtitle of host publicationPart 2
    PublisherNorsk Betongforening
    Pages115-118
    ISBN (Electronic)978-82-8208-056-9
    Publication statusPublished - 2017
    MoE publication typeA4 Article in a conference publication
    EventXXIII Nordic Concrete Research Symposium - Aalborg, Denmark
    Duration: 21 Aug 201723 Aug 2017

    Publication series

    SeriesNordic Concrete Research
    ISSN0800-6377

    Conference

    ConferenceXXIII Nordic Concrete Research Symposium
    CountryDenmark
    CityAalborg
    Period21/08/1723/08/17

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    Keywords

    • service life
    • limit state
    • design
    • modelling
    • deterioration
    • concrete cover
    • chloride ingress
    • corrosion
    • cracking
    • serviceability

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