Influence of compressive loading on chloride ingress through concrete

Junjie Wang, Muhammed Basheer, Sreejith Nanukuttan, Yun Bai

    Research output: Contribution to conferencePaper

    Abstract

    Chloride-induced corrosion of steel in concrete is one of most important durability and safety concern for reinforced concrete structures. To study chloride ingress into concrete is thus very important. However, most of the researchers focus on the studying chloride ingress through concrete samples without any loading. In reality concrete structures are subjected to different kinds of loads and therefore studying the effect of such loads on chloride transport is critical. In this work, 28 different concrete mixes were subjected to three levels of compressive load (0%, 50% and 75% of compressive failure load – f) for 24 hours. Further to unloading, these samples were subjected to non-steady state chloride diffusion test as per NT Build 443. The results were compared against the diffusion coefficient obtained for concrete samples that had no previous loading. D value for concretes subjected to 75% f showed a significant increase compared to 0% loading condition, but the increase was insignificant for 50% f. The results indicate that the influence of concrete mixes variables on D is more significant than that of loading level. Surface chloride concentration also increased with the loading level, which might be due to the increased concrete surface area caused by micro cracking.
    Original languageEnglish
    Number of pages6
    Publication statusPublished - 28 Aug 2014
    EventCivil Engineering Research in Ireland Conference (CERAI) - QUB, Belfast, United Kingdom
    Duration: 28 Aug 201429 Aug 2014

    Conference

    ConferenceCivil Engineering Research in Ireland Conference (CERAI)
    CountryUnited Kingdom
    CityBelfast
    Period28/08/201429/08/2014

    Keywords

    • structural loading
    • durability
    • chloride diffusion
    • cracking

    ASJC Scopus subject areas

    • Civil and Structural Engineering

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