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The Meso-Scale Texture of Cement Hydrate Gels: Out-of-Equilibrium Evolution and Thermodynamic Driving

TitleThe Meso-Scale Texture of Cement Hydrate Gels: Out-of-Equilibrium Evolution and Thermodynamic Driving
Publication TypeConference Proceedings
Year of Publication2015
AuthorsDel Gado E, Ioannidou K, Masoero E, Pellenq RJean-Marc, Ulm F-J, Yip S
EditorHellmich C, Pichler B, Kollegger J
SponsorRILEM American Society of Civil Engineers, Engn Mech Inst American Society of Civil Engineers, French Natl Res Ctr Lafarge
Conference Name10th International Conference on Mechanics and Physics of Creep, Shrinkage, and Durability of Concrete and Concrete Structures CONCREEP 10
VolumeCONCREEP 10: MECHANICS AND PHYSICS OF CREEP, SHRINKAGE, AND DURABILITY OF CONCRETE AND CONCRETE STRUCTURES
Pagination34-38
Date PublishedSep-17-2015
PublisherAmerican Society of Civil Engineers
Conference LocationSeptember 21–23, 2015 Vienna, AustriaReston, VA
Abstract

By the end of cement hydration calcium-silicate-hydrate (C-S-H) gels extends over tens and hundreds of nanometers. Their complex texture affects directly, and to a large extent, the macroscopic hygrothermal and mechanical behavior of cement. Here we review 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 investigations have unveiled the role, in the C-S-H gels, of nano-scale structural and mechanical heterogeneities that develop due to the the far-from-equilibrium physico-chemical environment in which the material forms. A subtle interplay between the out-of-equilibrium evolution and the effective interactions emerging between the nano-scale units of the gels at different stages of the hydration process ultimately determines the mesoscale texture of cement hydrates and their material properties.

DOI10.1061/978078447934610.1061/9780784479346.005
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