Microstructural Modeling of Early-Age Creep in Hydrating Cement Paste
This article has been corrected.
VIEW CORRECTIONPublication: Journal of Engineering Mechanics
Volume 142, Issue 11
Abstract
This paper presents a new approach to model the creep behavior of cement paste at early ages. The creep behavior is simulated by applying a time-varying generalized Maxwell model on the individual elements of a finite-element mesh of a simulated three-dimensional microstructure and compared with results in the literature. All mechanical properties of the constituent phases are taken from literature and Maxwell chain parameters are obtained by fitting the intrinsic creep of calcium silicate hydrate (C-S-H). A reasonable agreement between the simulations and the experimental results are obtained by assuming a constant C-S-H density of . It was found that better agreements could be obtained at low degree of hydrations, by assuming a loosely packed C-S-H growing in the microstructure. It was also found that the short-term creep characteristics of C-S-H from nanoindentation can be used to reproduce macroscopic creep at least over a few days. The results show how numerical models can be used to upscale phase characteristics to macroscopic properties of composites.
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Acknowledgments
The authors gratefully acknowledge the financial support from the Swiss National Science Foundation. The authors thank Dr. A. Guidoum and Dr. M. Vandamme for fruitful discussions. The authors would also like to thank the reviewers of this article for comments that helped in significantly improving the manuscript.
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Published In
Journal of Engineering Mechanics
Volume 142 • Issue 11 • November 2016
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Apr 14, 2015
Accepted: May 25, 2016
Published online: Jul 25, 2016
Published in print: Nov 1, 2016
Discussion open until: Dec 25, 2016
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