Is cement a glassy material?
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...
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| Format: | Article |
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CRC Press
2018
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| Online Access: | http://hdl.handle.net/1721.1/117511 https://orcid.org/0000-0002-7089-8069 https://orcid.org/0000-0001-5559-4190 |
| _version_ | 1826190839467999232 |
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| author | Bauchy, M. Qomi, J. Abdolhosseini Ulm, Franz-Josef Pellenq, Roland Jm |
| author2 | Massachusetts Institute of Technology. Department of Civil and Environmental Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Civil and Environmental Engineering Bauchy, M. Qomi, J. Abdolhosseini Ulm, Franz-Josef Pellenq, Roland Jm |
| author_sort | Bauchy, M. |
| collection | MIT |
| description | 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. |
| first_indexed | 2024-09-23T08:46:08Z |
| format | Article |
| id | mit-1721.1/117511 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T08:46:08Z |
| publishDate | 2018 |
| publisher | CRC Press |
| record_format | dspace |
| spelling | mit-1721.1/1175112022-09-23T14:26:53Z Is cement a glassy material? Bauchy, M. Qomi, J. Abdolhosseini Ulm, Franz-Josef Pellenq, Roland Jm Massachusetts Institute of Technology. Department of Civil and Environmental Engineering Ulm, Franz-Josef Pellenq, Roland Jm 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. 2018-08-24T16:49:35Z 2018-08-24T16:49:35Z 2014-03 2018-08-21T17:42:58Z Article http://purl.org/eprint/type/ConferencePaper 9781315762036 http://hdl.handle.net/1721.1/117511 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. https://orcid.org/0000-0002-7089-8069 https://orcid.org/0000-0001-5559-4190 https://www.crcpress.com/Computational-Modelling-of-Concrete-Structures/Bicanic-Mang-Meschke-de-Borst/p/book/9781138001459 Computational modelling of concrete structures: proceedings of EURO-C 2014 Creative Commons Attribution-Noncommercial-Share Alike http://creativecommons.org/licenses/by-nc-sa/4.0/ application/pdf CRC Press arXiv |
| spellingShingle | Bauchy, M. Qomi, J. Abdolhosseini Ulm, Franz-Josef Pellenq, Roland Jm Is cement a glassy material? |
| title | Is cement a glassy material? |
| title_full | Is cement a glassy material? |
| title_fullStr | Is cement a glassy material? |
| title_full_unstemmed | Is cement a glassy material? |
| title_short | Is cement a glassy material? |
| title_sort | is cement a glassy material |
| url | http://hdl.handle.net/1721.1/117511 https://orcid.org/0000-0002-7089-8069 https://orcid.org/0000-0001-5559-4190 |
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