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Nanostructure and nanomechanics of cement: polydisperse colloidal packing

TitleNanostructure and nanomechanics of cement: polydisperse colloidal packing
Publication TypeJournal Article
Year of Publication2012
AuthorsMasoero E, Del Gado E, Pellenq RJean-Marc, Ulm F-J, Yip S
JournalPhysical review letters
Volume109
Issue15
Pagination Article Number: 155503
Date PublishedOct-10-2012
Abstract

Cement setting and cohesion are governed by the precipitation and growth of calcium-silicate-hydrate, through a complex evolution of microstructure. A colloidal model to describe nucleation, packing, and rigidity of calcium-silicate-hydrate aggregates is proposed. Polydispersity and particle size dependent cohesion strength combine to produce a spectrum of packing fractions and of corresponding elastic properties that can be tested against nanoindentation experiments. Implications regarding plastic deformations and reconciling current structural characterizations are discussed.

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DOI10.1103/PhysRevLett.109.155503
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