Source:http://linkedlifedata.com/resource/pubmed/id/17760616
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| Predicate | Object |
|---|---|
| rdf:type | |
| lifeskim:mentions | |
| pubmed:issue |
Pt 3
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| pubmed:dateCreated |
2007-8-31
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| pubmed:abstractText |
Cryo-FIB-nanotomography is a novel high-resolution 3D-microscopy technique, which opens new possibilities for the quantitative microstructural analysis of complex suspensions. In this paper, we describe the microstructural changes associated with dissolution and precipitation processes occurring in a fresh cement paste, which has high alumina and sulphate contents. During the first 6 min, precipitation of ettringite leads to a general decrease of the particle size distribution. In the unhydrated cement paste almost no particles smaller than 500 nm are present, whereas after 6 min this size class already represents 9 vol%. The precipitation of ettringite also leads to a significant increase of the particle number density from 0.294*10(9)/mm(3) at t(0min) to 20.55*10(9)/mm(3) at t(6min). Correspondingly the surface area increases from 0.75 m(2)/g at t(0min) to 2.13 m(2)/g at t(6min). The small ettringite particles tend to form agglomerates, which strongly influence the rheological properties. The particular strength of cryo-FIB-nt is the potential to quantify particle structures in suspension and thereby also to describe higher-order topological features such as the particle-particle interfaces, which is important for the study of agglomeration processes.
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| pubmed:language |
eng
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| pubmed:journal | |
| pubmed:status |
PubMed-not-MEDLINE
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| pubmed:month |
Sep
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| pubmed:issn |
0022-2720
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| pubmed:author | |
| pubmed:issnType |
Print
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| pubmed:volume |
227
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| pubmed:owner |
NLM
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| pubmed:authorsComplete |
Y
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| pubmed:pagination |
216-28
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| pubmed:year |
2007
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| pubmed:articleTitle |
Cryo-FIB-nanotomography for quantitative analysis of particle structures in cement suspensions.
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| pubmed:affiliation |
EMPA, Materials Science and Technology, 3D-Mat group, Ueberlandstr. 129, CH-8600 Dübendorf, Switzerland. lorenz.holzer@empa.ch
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| pubmed:publicationType |
Journal Article
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