Influence of different European cements (CEM) on the hydration of cover-zone concrete during the curing and post curing periods

William John McCarter, Gerard Starrs, Andrew Adamson, Malcolm Chrisp, P A M Basheer, Sreejith V Nanukuttan, S Srinivasan, C Green

    Research output: Contribution to journalArticle

    10 Citations (Scopus)
    23 Downloads (Pure)

    Abstract

    The durability of reinforced concrete structures depends, in the main, on the performance of the cover-zone concrete, which protects the steel from the external environment. This paper focuses on the use of discretized electrical property measurements to study depth-related features during both the curing and postcuring period, thereby allowing an integrated assessment of the protective properties of the cover region. In the current work, use is made of a small, multielectrode array embedded within the surface 75mm of concrete specimens. Concretes were manufactured with different European cements (CEM) and water/binder ratios representing mixes that 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 300days which showed ongoing hydration, pozzolanic reaction, and pore-structure refinement; in addition, in the postcuring 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
    Early online date6 Sep 2012
    DOIs
    Publication statusPublished - Sep 2013

    Keywords

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

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