Mesoscopic packing of disk-like building blocks in calcium silicate hydrate
At 100-nanometer length scale, the mesoscopic structure of calcium silicate hydrate (C-S-H) plays a critical role in determining the macroscopic material properties, such as porosity. In order to explore the mesoscopic structure of C-S-H, we employ two effective techniques, nanoindentation test and...
| Main Authors: | , , |
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| Format: | Article |
| Language: | en_US |
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Nature Publishing Group
2017
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| Online Access: | http://hdl.handle.net/1721.1/109468 |
| _version_ | 1826190376447246336 |
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| author | Yu, Zechuan Zhou, Ao Lau, Denvid |
| author2 | Massachusetts Institute of Technology. Department of Civil and Environmental Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Civil and Environmental Engineering Yu, Zechuan Zhou, Ao Lau, Denvid |
| author_sort | Yu, Zechuan |
| collection | MIT |
| description | At 100-nanometer length scale, the mesoscopic structure of calcium silicate hydrate (C-S-H) plays a critical role in determining the macroscopic material properties, such as porosity. In order to explore the mesoscopic structure of C-S-H, we employ two effective techniques, nanoindentation test and molecular dynamics simulation. Grid nanoindentation tests find different porosity of C-S-H in cement paste specimens prepared at varied water-to-cement (w/c) ratios. The w/c-ratio-induced porosity difference can be ascribed to the aspect ratio (diameter-to-thickness ratio) of disk-like C-S-H building blocks. The molecular dynamics simulation, with a mesoscopic C-S-H model, reveals 3 typical packing patterns and relates the packing density to the aspect ratio. Illustrated with disk-like C-S-H building blocks, this study provides a description of C-S-H structures in complement to spherical-particle C-S-H models at the sub-micron scale. |
| first_indexed | 2024-09-23T08:39:20Z |
| format | Article |
| id | mit-1721.1/109468 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T08:39:20Z |
| publishDate | 2017 |
| publisher | Nature Publishing Group |
| record_format | dspace |
| spelling | mit-1721.1/1094682022-09-23T13:37:16Z Mesoscopic packing of disk-like building blocks in calcium silicate hydrate Yu, Zechuan Zhou, Ao Lau, Denvid Massachusetts Institute of Technology. Department of Civil and Environmental Engineering Lau, Denvid At 100-nanometer length scale, the mesoscopic structure of calcium silicate hydrate (C-S-H) plays a critical role in determining the macroscopic material properties, such as porosity. In order to explore the mesoscopic structure of C-S-H, we employ two effective techniques, nanoindentation test and molecular dynamics simulation. Grid nanoindentation tests find different porosity of C-S-H in cement paste specimens prepared at varied water-to-cement (w/c) ratios. The w/c-ratio-induced porosity difference can be ascribed to the aspect ratio (diameter-to-thickness ratio) of disk-like C-S-H building blocks. The molecular dynamics simulation, with a mesoscopic C-S-H model, reveals 3 typical packing patterns and relates the packing density to the aspect ratio. Illustrated with disk-like C-S-H building blocks, this study provides a description of C-S-H structures in complement to spherical-particle C-S-H models at the sub-micron scale. Croucher Foundation (Start-up Allowance for Croucher Scholars with the Grant No. 9500012) Research Grants Council (Hong Kong, China) (through the Early Career Scheme (ECS) with the Grant No. 139113) 2017-05-31T16:55:38Z 2017-05-31T16:55:38Z 2016-11 2016-06 Article http://purl.org/eprint/type/JournalArticle 2045-2322 http://hdl.handle.net/1721.1/109468 Yu, Zechuan, Ao Zhou, and Denvid Lau. “Mesoscopic Packing of Disk-Like Building Blocks in Calcium Silicate Hydrate.” Scientific Reports 6, no. 1 (November 15, 2016). en_US http://dx.doi.org/10.1038/srep36967 Scientific Reports Creative Commons Attribution 4.0 International License http://creativecommons.org/licenses/by/4.0/ application/pdf Nature Publishing Group Nature |
| spellingShingle | Yu, Zechuan Zhou, Ao Lau, Denvid Mesoscopic packing of disk-like building blocks in calcium silicate hydrate |
| title | Mesoscopic packing of disk-like building blocks in calcium silicate hydrate |
| title_full | Mesoscopic packing of disk-like building blocks in calcium silicate hydrate |
| title_fullStr | Mesoscopic packing of disk-like building blocks in calcium silicate hydrate |
| title_full_unstemmed | Mesoscopic packing of disk-like building blocks in calcium silicate hydrate |
| title_short | Mesoscopic packing of disk-like building blocks in calcium silicate hydrate |
| title_sort | mesoscopic packing of disk like building blocks in calcium silicate hydrate |
| url | http://hdl.handle.net/1721.1/109468 |
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