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Self-sealing, autogenous healing and continued hydration: What is the difference?

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Abstract

It is well known that as concrete hydrates its permeability decreases. Continued hydration, however, is not the only mechanism which causes such reduction. Self-sealing, which is largely attributed to the dissolution and redeposition of hydrates, and autogenous healing of cracks, can also significantly reduce the flow. This paper reviews the relative effects of self-sealing, autogenous healing and hydration.

Résumé

Il est bien connu que lorsque le béton s'hydrate sa perméabilité décroît. Cependant, l'hydratation continue n'est pas le seul mécanisme responsable d'une telle réduction. L'imperméabilisation, en grande partie attribuée à la dissolution et à la précipitation des hydrates, ainsi que la fermeture des fissures peuvent également réduire de manière significative le flux. Cet article passe en revue les effets relatifs à cette imperméabilisation, de la fermeture des fissures et de l'hydration.

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Authors and Affiliations

  1. Department of Civil Engineering, University of Toronto, M5S 1A4, Toronto, Ontario, Canada

    Nataliya Hearn (Assistant Professor)

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  1. Nataliya Hearn
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Editorial Note Dr. N. Heam is a RILEM Affiliate Member. She is active in the work of Technical Committee 146-TCF (Tightness of Concrete with Respect to Fluids). This paper was accepted in the former category of “Review Paper” and as such is published as a Technical Report.

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Hearn, N. Self-sealing, autogenous healing and continued hydration: What is the difference?. Mat. Struct. 31, 563–567 (1998). https://doi.org/10.1007/BF02481539

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  • DOI: https://doi.org/10.1007/BF02481539

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