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Microstructure of cement hydrates containing calcium lignosulfonate admixture

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Abstract

Using scanning electron microscopy, the development of the hydration products of a cement with and without calcium lignosulfonate (CLS) admixture was followed. The hydration was observed over the period from 4 hours up to 28 days. It was concluded that the presence of CLS did not change the morphology and structure of the hydration products compared to admixture free hydrates. The basic structure is mainly ettringite rods and clusters of calcium silicate hydrate (CSH) fibers. This basic structure becomes denser as hydration proceeds.

Résumé

On a étudié au moyen du microscope électronique à balayage l'évolution des produits d'hydratation du ciment avec et sans addition de lignosulfonate de calcium. L'hydratation a été observée dans la période entre 4 heures et 28 jours. On en conclut que la présence de lignosulfonate de calcium ne modifie pas la morphologie et la structure des produits d'hydratation par rapport aux hydrates sans adjuvants. La structure de base est principalement composée de bâtonnets et d'agglomérats de fibres de silicate de calcium hydraté. Cette structure devient plus dense à mesure que l'hydratation progresse.

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Authors and Affiliations

  1. Civil Engineering Department, University of Calgary, Calgary, Canada

    S. M. Khalil B. Sc. (Eng.), M. Sc. (Eng.), Ph. D. (Visiting Professor)

  2. Civil Engineering Department, University of Calgary, Calgary, Canada

    M. A. Ward B. Sc. (C. E.), DIC, Ph. D., P. Eng. (Professor and Head)

Authors
  1. S. M. Khalil B. Sc. (Eng.), M. Sc. (Eng.), Ph. D.
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  2. M. A. Ward B. Sc. (C. E.), DIC, Ph. D., P. Eng.
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Khalil, S.M., Ward, M.A. Microstructure of cement hydrates containing calcium lignosulfonate admixture. Mat. Constr. 10, 67–72 (1977). https://doi.org/10.1007/BF02474853

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  • DOI: https://doi.org/10.1007/BF02474853

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