Electrical conductivity, diffusion, and permeability of Portland cement-based mortars

William John McCarter, Gerard Starrs, T Malcolm Chrisp

    Research output: Contribution to journalArticle

    134 Citations (Scopus)

    Abstract

    The electrical conductivity of a range of Portland cement-based mortars was studied over a period of 450 days hydration. The influence of thermal cycling on conductivity was investigated and the activation energy, Ea, established for conduction processes. Ea was found to be system specific and was in the range 16-30 kJ/mol (0.16-0.31 eV/ion); pozzolanic additions had the effect of increasing Ea in comparison with the plain ordinary Portland cement (OPC) mortar. Results also indicate that on the initial heating cycle, microstructural changes occurred. At the end of the test period, permeability and diffusion tests were carried out and data are presented in this respect.

    Original languageEnglish
    Pages (from-to)1395-1400
    Number of pages6
    JournalCement and Concrete Research
    Volume30
    Issue number9
    DOIs
    Publication statusPublished - Sep 2000

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