Developments in Performance Monitoring of Concrete Exposed to Extreme Environments

W.J. McCarter, T.M. Chrisp, G. Starrs, A. Adamson, E. Owens, P. A. Muhammed Basheer, Sree V. Nanukuttan, Sudarsan Srinivasan, Niall Holmes

    Research output: Contribution to journalArticlepeer-review

    32 Citations (Scopus)

    Abstract

    The performance of the surface zone of concrete is acknowledged as a major factor governing the rate of deterioration of reinforced concrete structures as it provides the only barrier to the ingress of water containing dissolved ionic species such as chlorides which, ultimately, initiate corrosion of the reinforcement. In-situ monitoring of cover-zone concrete is therefore critical in attempting to make realistic predictions as to the in-service performance of the structure. To this end, this paper presents developments in a remote interrogation system to allow continuous, real-time monitoring of the cover-zone concrete from an office setting. Use is made of a multi-electrode array embedded within cover-zone concrete to acquire discretized electrical resistivity and temperature measurements, with both parameters monitored spatially and temporally. On-site instrumentation, which allows remote interrogation of concrete samples placed at a marine exposure site, is detailed, together with data handling and processing procedures. Site-measurements highlight the influence of temperature on electrical resistivity and an Arrhenius-based temperature correction protocol is developed using on-site measurements to standardize resistivity data to a reference temperature; this is an advancement over the use of laboratory-based procedures. The testing methodology and interrogation system represents a robust, low-cost and high-value technique which could be deployed for intelligent monitoring of reinforced concrete structures.
    Original languageEnglish
    Pages (from-to)167-175
    Number of pages9
    JournalJournal of Infrastructure Systems
    Volume18
    Issue number3
    DOIs
    Publication statusPublished - Sep 2012

    ASJC Scopus subject areas

    • Civil and Structural Engineering

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