Maturity testing of lightweight self-compacting and vibrated concretes

M N Soutsos, G Turu'Allo, K Owens, J Kwasny, S.J. Barnett, P A M Basheer

    Research output: Contribution to journalArticle

    22 Citations (Scopus)

    Abstract

    A series of laboratory tests were carried out to investigate the effect of temperature on the early-age strength development of lightweight self-compacting and vibrated concrete mixtures. These had been developed at Queen’s University Belfast as part of a Technology Strategy Board funded project aimed at developing lightweight and low energy concretes. The new mixtures incorporated high volumes of pulverised fuel ash (PFA), ground granulated blast furnace slag (GGBS), and limestone powder (LSP). Activator, i.e. sodium sulphate, was used to improve the early age strength development of vibrated concrete mixtures proportioned with PFA and GGBS. For each mixture, concrete cubes were manufactured and cured under isothermal (20 °C, 30 °C, 40 °C and 50 °C) as well as adiabatic conditions. The temperature rise under adiabatic curing conditions was also measured. The resulting isothermal strength data were analysed to determine the apparent activation energies of the binders/mixtures used. The suitability of maturity methods for predicting concrete strength development of these low energy lightweight self-compacting and vibrated concrete mixtures under non-isothermal, i.e. adiabatic, curing was assessed.
    Original languageEnglish
    Pages (from-to)118-125
    Number of pages8
    JournalConstruction and Building Materials
    Volume47
    Early online date03 Jun 2013
    DOIs
    Publication statusPublished - Oct 2013

    Keywords

    • early age strength
    • maturity

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