Influence of Different European Cements (CEM) on the Hydration of Cover-Zone Concrete during the Curing and Post Curing Periods

W. J. McCarter*, G. Starrs, A. Adamson, T. M. Chrisp, P. A. M. Basheer, S. Nanukuttan, S. Srinivasan, C. Green

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    12 Citations (Scopus)

    Abstract

    The durability of reinforced concrete structures depends, in the main, on the performance of the cover-zone concrete as it is this which protects the steel from the external environment. This paper focusses on the use of discretised electrical property measurements to study depth-related features during both the curing and post-curing period thereby allowing an integrated assessment of the protective properties of the cover region. In the current work, use is made of a small, multi-electrode array embedded within the surface 75mm of concrete specimens. Concretes were manufactured with different European cements (CEM) and water/binder ratios representing mixes which satisfied the minimum requirements for a range of environmental exposure classes including exposure to chlorides. Electrical resistance measurements were taken over a period in excess of 300 days which showed on-going hydration, pozzolanic reaction and pore-structure refinement; in addition, in the post-curing period, when exposed to a cyclic chloride ponding regime, measurements could be used to study the convective zone and ionic enrichment of the surface layer.
    Original languageEnglish
    Pages (from-to)1335-1343
    Number of pages9
    JournalJournal of Materials in Civil Engineering
    Volume25
    Issue number9
    DOIs
    Publication statusPublished - 01 Sep 2013

    Keywords

    • Concrete
    • Cover zone
    • Hydration
    • Supplementary cementitious materials
    • Monitoring
    • Electrical resistivity
    • ELECTRICAL-RESISTIVITY MEASUREMENT
    • CONDUCTIVITY
    • PASTE
    • CHLORIDES
    • MORTARS

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