Rheological characterization of cement pastes with functional filler particles

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    7 Citeringar (Scopus)

    Sammanfattning

    Cement pastes were studied using conventional rheological methods. The effect of different types of functional fillers on the theological properties and hydration rate of the pastes was analysed. The fillers were found to have varying chemistry and therefore surface properties. Porous titania particles raised the cohesive energy of the paste significantly already at low additions. Limestone particles raised the cohesive energy somewhat, but clearly less than titania. The zeta potential of the particles was found to somewhat affect the rheology. Reaction rates of the pastes were measured using oscillatory rheological measurement with constant amplitude and frequency. Titania particles were found to accelerate the hydration rate more than limestone particles. Of the limestone particles pure calcite increased the reaction rate more than dolomitic limestone. When the limestone particles were modified to provide C-S-H nucleation sites the cohesive energy was raised and the reaction rate was further increased. (C) 2014 Elsevier Ltd. All rights reserved.
    OriginalspråkOdefinierat/okänt
    Sidor (från-till)1–7
    Antal sidor7
    TidskriftCement and Concrete Research
    Volym65
    DOI
    StatusPublicerad - 2014
    MoE-publikationstypA1 Tidskriftsartikel-refererad

    Nyckelord

    • CaCO3
    • Calcium-Silicate-Hydrate (C-S-H)
    • Cement Paste
    • Kinetics
    • Rheology

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