Effect of Superabsorbent polymers (SAP) on workability and hydration process in fly ash cmentitious composites

Agnieszka Klemm, Karol S. Sikora

    Research output: Contribution to journalArticle

    Abstract

    The effects of three superabsorbent polymers (SAPs) on variations in the cement hydration process were studied by calorimetric measurements and the X-ray scanning technique. It was concluded that the influence of superabsorbent polymers on workability and autogenous shrinkage strongly depends on SAP water absorption/desorption kinetics. Gradual release of additional water stored by a SAP facilitated the formation of a denser and more homogenous cementitious matrix. The addition of fly ash to portland cement had a notable influence on the hydration process and microstructure development in mortars regardless of modifications by the SAP. Characteristic patterns attributed to pozzolanic reactions appeared to be related to the mortar densification measured by the X-ray absorption and quasi-adiabatic calorimetry techniques during the first 48 h.
    Original languageEnglish
    JournalJournal of Materials in Civil Engineering
    Volume27
    Issue number5
    DOIs
    Publication statusPublished - 2014

    Keywords

    • internal curing
    • superabsorbent polymers
    • Portland fly ash cement
    • autogeneous shrinkage
    • x-ray absorption

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