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Nano-granular texture of cement hydrates

TitleNano-granular texture of cement hydrates
Publication TypeJournal Article
Year of Publication2017
AuthorsIoannidou K, Ulm F-J, Levitz PE, Del Gado E, Pellenq RJean-Marc
Secondary AuthorsRadjaï F, Nezamabadi S, Luding S., Delenne J-Y
JournalEPJ Web of Conferences
Volume140
PaginationArticle Number 15027
Date PublishedJun-30-2017
Abstract

Mechanical behavior of concrete crucially depends on cement hydrates, the “glue” of cement. The design of high performance and more environmentally friendly cements demands a deeper understanding of the formation of the multiscale structure of cement hydrates, when they precipitate and densify. We investigate the precipitation and setting of nano-grains of cement hydrates using a combination of Monte Carlo and Molecular Dynamics numerical simulations and study their texture from nano up to the micron scale. We characterize the texture of cement hydrates using the local volume fraction distribution, the pore size distribution, the scattering intensity and the chord length distribution and we compare them with experiments. Our nano-granular model provides cement structure with realistic texture and mechanics and can be further used to investigate degradation mechanisms.

URLhttp://www.epj-conferences.org/10.1051/epjconf/201714015027
DOI10.1051/epjconf/201714015027
Short TitleEPJ Web Conf.
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