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Creep of Bulk C-S-H: Insights from Molecular Dynamics Simulations

TitleCreep of Bulk C-S-H: Insights from Molecular Dynamics Simulations
Publication TypeConference Proceedings
Year of Publication2015
AuthorsBauchy M, Masoero E, Ulm F-J, Pellenq RJean-Marc
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 StructuresCONCREEP 10
VolumeCONCREEP 10: MECHANICS AND PHYSICS OF CREEP, SHRINKAGE, AND DURABILITY OF CONCRETE AND CONCRETE STRUCTURES
Pagination511-516
Date PublishedSep-17-2015
PublisherAmerican Society of Civil Engineers
Conference LocationSeptember 21–23, 2015, Vienna, AustriaReston, VA
Abstract

Understanding the physical origin of creep in calcium–silicate–hydrate (C–S–H) is of primary importance, both for fundamental and practical interest. Here, we present a new method, based on molecular dynamics simulation, allowing us to simulate the long-term visco-elastic deformations of C–S–H. Under a given shear stress, C–S–H features a gradually increasing shear strain, which follows a logarithmic law. The computed creep modulus is found to be independent of the shear stress applied and is in excellent agreement with nanoindentation measurements, as extrapolated to zero porosity.

DOI10.1061/978078447934610.1061/9780784479346.061
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