Is cement a glassy material?
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1506.06445.pdf
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Author(s)
Bauchy, M.
Qomi, J. Abdolhosseini
Ulm, Franz-Josef
Pellenq, Roland Jm
Date Issued
March 2014
Journal
Computational modelling of concrete structures: proceedings of EURO-C 2014
Publisher
CRC Press
Citation
Bauchy, M. "Is Cement a Glassy Material?" Computational modelling of concrete structures: proceedings of EURO-C 2014, 24-27 March 2014, St. Anton am Arlberg, Austria, CRC Press, 2014.
Version
Author's final manuscript
Abstract
The nature of Calcium-Silicate-Hydrate (C-S-H), the binding phase of cement, remains a controversial question. In particular, contrary to the former crystalline model, it was recently proposed that its nanoscale structure was actually amorphous. To elucidate this issue, we analyzed the structure of a realistic simulation of C-S-H, and compared the latter to crystalline tobermorite, a natural analogue to cement, and to an artificial ideal glass. Results clearly support that C-S-H is amorphous. However, its structure shows an intermediate degree of order, retaining some characteristics of the crystal while acquiring an overall glass-like disorder. Thanks to a detailed quantification of order and disorder, we show that its amorphous state mainly arises from its hydration.
MIT Department
Massachusetts Institute of Technology. Department of Civil and Environmental Engineering
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Creative Commons Attribution-Noncommercial-Share Alike
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DOI of Published Version
https://www.crcpress.com/Computational-Modelling-of-Concrete-Structures/Bicanic-Mang-Meschke-de-Borst/p/book/9781138001459
