A durability performance-index for concrete: developments in a novel test method

W. John McCarter, T. Malcolm Chrisp, Gerard Starrs, P. A. Muhammed Basheer, Sreejith Nanukuttan, Sudarshan Srinivasan, Bryan J. Magee

    Research output: Contribution to journalArticle

    7 Citations (Scopus)
    276 Downloads (Pure)

    Abstract

    Implementation of both design for durability and performance-based standards and specifications are limited by the lack of rapid, simple, science based test methods for characterising the transport properties and deterioration resistance of concrete. This paper presents developments in the application of electrical property measurements as a testing methodology to evaluate the relative performance of a range of concrete mixes. The technique lends itself to in-situ monitoring thereby allowing measurements to be obtained on the as-placed concrete. Conductivity measurements are presented for concretes with and without supplementary cementitious materials (SCM’s) from demoulding up to 350 days. It is shown that electrical conductivity measurements display a continual decrease over the entire test period and attributed to pore structure refinement due to hydration and pozzolanic reaction. The term formation factor is introduced to rank concrete performance in terms of is resistance to chloride penetration.
    Original languageEnglish
    Pages (from-to)2-22
    Number of pages21
    JournalInternational Journal of Structural Engineering
    Volume6
    Issue number1
    DOIs
    Publication statusPublished - 2015

    Keywords

    • Concrete
    • cover-zone
    • durability
    • performance testing
    • monitoring
    • electrical conductivity
    • formation factor

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