Modelling the time to concrete cover cracking due to reinforcement corrosion

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

    Abstract

    The service life design of reinforced concrete structures requires material models capable of reliably describing both mechanisms of damage and the general progression of damage over time. However, most models that are currently being used only capture the process of carbonation and chloride penetration into the uncracked concrete that is at the initial phase of degradation. Typically, these models disregard the actual damage, i.e. the corrosion of the reinforcing steel. As a result, the service life design established to date only considers the end of the initiation phase of the degradation process, or, in other words, the onset of damage (time of depassivation or onset of corrosion) as a critical limit state. The corrosion of the reinforcement and its consequences, i.e. the crack formation and spalling of concrete, are not considered, which may lead to a substantially shorter estimated service life of the structures. Comprehensive investigations were recently undertaken on the depassivation of steel reinforcement and on crack formation in concrete which have resulted in an analytical prediction model for corrosion-induced cracking occurring in the surface zones of structural components. This paper presents a holistic approach which combines two models used for determining the time to depassivation (initiation phase) and the time to cover cracking as a result of reinforcement corrosion (propagation phase). An example is provided of a structural element which has been designed for the serviceability limit state of concrete cover cracking.
    Original languageEnglish
    Title of host publication Structural Mechanics in Reactor Technologies
    Subtitle of host publication23rd International Conference on Structural Mechanics in Reactor Technology 2015 (SMiRT 23)
    PublisherInternational Assn for Structural Mechanics in Reactor Technology IASMiRT
    Number of pages10
    ISBN (Print)9781510843448
    Publication statusPublished - 2015
    MoE publication typeA4 Article in a conference publication
    Event22nd International Conference on Structural Mechanics in Reactor Technology 2013, SMiRT 22 - San Francisco, United States
    Duration: 18 Aug 201323 Aug 2013
    Conference number: 23

    Conference

    Conference22nd International Conference on Structural Mechanics in Reactor Technology 2013, SMiRT 22
    Abbreviated titleSMiRT 22
    CountryUnited States
    CitySan Francisco
    Period18/08/1323/08/13

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  • Cite this

    Ferreira, M., Bohner, E., & Saarela, O. (2015). Modelling the time to concrete cover cracking due to reinforcement corrosion. In Structural Mechanics in Reactor Technologies: 23rd International Conference on Structural Mechanics in Reactor Technology 2015 (SMiRT 23) International Assn for Structural Mechanics in Reactor Technology IASMiRT .