Chloride ingress and carbonation in concrete exposed to cyclic wetting and drying

Jonathon Backus, Daniel McPolin, Adrian Long, Niall Holmes

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    1 Citation (Scopus)

    Abstract

    Carbonation and chloride ingress are the two main causes of corrosion in reinforced concrete structures. An investigation to monitor the ingress of chlorides and carbonation during a 9 month wetting and drying exposure regime to simulate conditions in which multiple mode transport mechanisms are active was conducted on a variety of binders. The penetration was evaluated using water and acid soluble chloride profiles, and phenolphthalein indicator. X-ray diffraction was also used to determine the presence of bound chlorides and carbonation. The results indicated that acid extraction of chlorides is quantitatively reliable and practical for assessing penetration. The effect of carbonation on binding capability was observed and the relative quantity of chlorides also showed a correlation with the amount of chlorides bound in the form of Friedel’s salt.
    Original languageEnglish
    Title of host publicationProceedings for 3rd International Conference on the Durability of Concrete Structures
    PublisherQueen's University Belfast
    Number of pages8
    Publication statusPublished - 17 Sep 2012
    Event3rd International Conference on the Durability of Concrete Structures - Queen's University, Belfast, United Kingdom
    Duration: 17 Sep 201219 Sep 2012

    Conference

    Conference3rd International Conference on the Durability of Concrete Structures
    CountryUnited Kingdom
    CityBelfast
    Period17/09/201219/09/2012

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  • Cite this

    Backus, J., McPolin, D., Long, A., & Holmes, N. (2012). Chloride ingress and carbonation in concrete exposed to cyclic wetting and drying. In Proceedings for 3rd International Conference on the Durability of Concrete Structures Queen's University Belfast. http://www.qub.ac.uk/sites/ICDCS2012/