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A soft matter in construction - Statistical physics approach to formation and mechanics of C-S-H gels in cement

Del Gado, E. ; Ioannidou, K. ; Masoero, E. ; Baronnet, A. ; Pellenq, R.J.-M ; Ulm, F.-J ; Yip, S.

In: The European Physical Journal Special Topics, 2014, vol. 223, no. 11, p. 2285-2295

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    Titel
    • A soft matter in construction - Statistical physics approach to formation and mechanics of C-S-H gels in cement
    Autor
    • Del Gado, E.. Department of Physics and Institute for Soft Matter Synthesis & Metrology, Georgetown University, Washington DC, USA
    • Ioannidou, K.. Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, USA
    • Masoero, E.. School of Civil Engineering and Geosciences, Newcastle University, Newcastle upon Tyne, Newcastle, UK
    • Baronnet, A.. CINaM, CNRS and Aix-Marseille University, Marseille, France
    • Pellenq, R.J.-M. Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, USA
    • Ulm, F.-J. Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, USA
    • Yip, S.. Department of Nuclear Science and Engineering, Massachusetts Institute of Technology, Cambridge, USA
    Dokumententyp
    • Postprint
    Sprache
    • Englisch
    Veröffentlicht in
    • The European Physical Journal Special Topics, 2014, vol. 223, no. 11, p. 2285-2295. Springer Berlin Heidelberg
    Andere elektronische Ausgabe
    Klassifikation
    • Physik
    OAI-PMH-ID
    • oai:doc.rero.ch:325193
    Summary
    Calcium-silicate hydrate (C-S-H) is the main binding agent in cement and concrete. It forms at the beginning of cement hydration, it progressively densifies as cement hardens and is ultimately responsible of concrete performances. This hydration product is a cohesive nano-scale gel, whose structure and mechanics are still poorly understood, in spite of its practical importance. Here we review some of the open questions for this fascinating material and a statistical physics approach recently developed, which allows us to investigate the gel formation under the out-of-equilibrium conditions typical of cement hydration and the role of the nano-scale structure in C-S-H mechanics upon hardening. Our approach unveils how some distinctive features of the kinetics of cement hydration can be related to changes in the morphology of the gels and elucidates the role of nano-scale mechanical heterogeneities in the hardened C-S-H.