Sensitivity of electrode contact solutions and contact pressure in assessing electrical resistivity of concrete

Moray D. Newlands, M. Rod Jones, Sivakumar Kandasami, Tom A. Harrison

    Research output: Contribution to journalArticlepeer-review

    33 Citations (Scopus)

    Abstract

    This paper covers some aspects of the development of a simple and robust electrical resistivity test method which has the potential for assessing the durability of concrete. A simple low frequency AC end-to-end resistivity test was adopted as a laboratory test method and has the potential of being preferred as a quality control test in readymixed concrete plants. The test method forgoes the need for cast-in place electrodes or silver paint for electrode-concrete interface. The work presented here examines the sensitivity of electrode contact solutions and contact pressures at the electrode-concrete interface with the use of synthetic sponges. Five concretes conforming to C32/40 compressive strength class in BS EN206-1/BS 8500-1 made from five different cement types were investigated and the work highlighted the need for using a reference conductive contact solution and a contact pressure.
    Original languageEnglish
    Pages (from-to)621-632
    Number of pages12
    JournalMaterials and Structures
    Volume41
    Issue number4
    DOIs
    Publication statusPublished - May 2008

    Keywords

    • Resistivity
    • Resistance
    • Electrode contact
    • Conductivity
    • Concrete
    • Cement
    • Pore structure

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