Source:http://linkedlifedata.com/resource/pubmed/id/15231326
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| Predicate | Object |
|---|---|
| rdf:type | |
| lifeskim:mentions | |
| pubmed:issue |
3-4
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| pubmed:dateCreated |
2004-7-2
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| pubmed:abstractText |
This work is the first step towards the understanding of the structure of calcium silicate hydrate (C-S-H), the main constituent of cement paste, at the nanoscale. The first demonstration of atomic-resolution imaging of the (C-S-H) surface with an atomic force microscope (AFM) was performed. C-S-H nanoparticles (60 x 30 x 5 nm3) were partially recrystallized by Ostwald ripening after long-term equilibrium in saturated calcium hydroxide solution of different concentration, leading to C-S-H of different calcium/silicon ratio (Ca/Si). The results of atomic resolution made possible the investigation of the C-S-H cell surface parameters. The surface layer structure depended on the calcium hydroxide concentration with which it equilibrated. The change in structural properties perpendicular to the C-S-H layer was probed by modifying AFM for nanoindentation hardness measurements with a depth of indentation as low as 1 nm. The change in elastic modulus depending on the calcium/silicon ratio was evaluated and correlated in the change in structural parameters in this direction as estimated by X-ray diffraction.
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| pubmed:language |
eng
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| pubmed:journal | |
| pubmed:status |
PubMed-not-MEDLINE
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| pubmed:month |
Aug
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| pubmed:issn |
0304-3991
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| pubmed:author | |
| pubmed:issnType |
Print
|
| pubmed:volume |
100
|
| pubmed:owner |
NLM
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| pubmed:authorsComplete |
Y
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| pubmed:pagination |
331-8
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| pubmed:year |
2004
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| pubmed:articleTitle |
Investigation of the surface structure and elastic properties of calcium silicate hydrates at the nanoscale.
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| pubmed:affiliation |
Physics Laboratory LPUB, UMR CNRS 5027, University of Bourgogne, F-21078 Dijon, France.
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| pubmed:publicationType |
Journal Article
|