The effects of thermal load and frost cycles on the water transport in two high-performance concretes
Identifieur interne : 001757 ( Main/Exploration ); précédent : 001756; suivant : 001758The effects of thermal load and frost cycles on the water transport in two high-performance concretes
Auteurs : Robert Ern [République tchèque] ; Jaroslava Drchalová [République tchèque] ; Pavla Rovnan Ková [République tchèque]Source :
- Cement and Concrete Research [ 0008-8846 ] ; 2001.
English descriptors
Abstract
Moisture diffusivity of two high-performance concretes used in concrete containment buildings of nuclear power plants is measured as a function of temperature up to 80°C, and the effects of high-temperature exposure up to 800°C and freeze/thaw cycles on its value are analyzed. The temperatures in the range of 0–80°C are found to have a moderate effect on the moisture diffusivities of both concretes, the typical increase being about 100–200% over the whole region. The high temperature exposure results in a much more significant increase of moisture diffusivity, up to three orders of magnitude, and the freeze/thaw exposure of 400 cycles to an increase up to one order of magnitude. As the main reason for the mentioned moisture diffusivity increase, the crack formation is identified. Both thermal decomposition accompanied by release of substantial amount of gaseous substances and water freezing in the porous system can damage the internal microstructure of the matrix due to the significant pressure increase in the porous body. The magnitude of changes of moisture diffusivity is found to be affected by the quality of aggregates rather than by the quality of cement. High quality quartzitic aggregates with very low porosity and very good mechanical properties perform much better than other more porous siliceous aggregates such as opal, and than the calcareous aggregates such as chalk.
Url:
DOI: 10.1016/S0008-8846(01)00556-7
Affiliations:
Links toward previous steps (curation, corpus...)
- to stream Istex, to step Corpus: 001699
- to stream Istex, to step Curation: 001699
- to stream Istex, to step Checkpoint: 000837
- to stream Main, to step Merge: 001800
- to stream Main, to step Curation: 001757
Le document en format XML
<record><TEI wicri:istexFullTextTei="biblStruct"><teiHeader><fileDesc><titleStmt><title xml:lang="en">The effects of thermal load and frost cycles on the water transport in two high-performance concretes</title><author><name sortKey=" Ern, Robert" sort=" Ern, Robert" uniqKey=" Ern R" first="Robert" last=" Ern">Robert Ern</name></author><author><name sortKey="Drchalova, Jaroslava" sort="Drchalova, Jaroslava" uniqKey="Drchalova J" first="Jaroslava" last="Drchalová">Jaroslava Drchalová</name></author><author><name sortKey="Rovnan Kova, Pavla" sort="Rovnan Kova, Pavla" uniqKey="Rovnan Kova P" first="Pavla" last="Rovnan Ková">Pavla Rovnan Ková</name></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:383EAD422A90D3500697FEDC0B68B9BB5608C4B3</idno><date when="2001" year="2001">2001</date><idno type="doi">10.1016/S0008-8846(01)00556-7</idno><idno type="url">https://api.istex.fr/document/383EAD422A90D3500697FEDC0B68B9BB5608C4B3/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">001699</idno><idno type="wicri:Area/Istex/Curation">001699</idno><idno type="wicri:Area/Istex/Checkpoint">000837</idno><idno type="wicri:doubleKey">0008-8846:2001: Ern R:the:effects:of</idno><idno type="wicri:Area/Main/Merge">001800</idno><idno type="wicri:Area/Main/Curation">001757</idno><idno type="wicri:Area/Main/Exploration">001757</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">The effects of thermal load and frost cycles on the water transport in two high-performance concretes</title><author><name sortKey=" Ern, Robert" sort=" Ern, Robert" uniqKey=" Ern R" first="Robert" last=" Ern">Robert Ern</name><affiliation wicri:level="1"><country xml:lang="fr">République tchèque</country><wicri:regionArea>Department of Structural Mechanics, Faculty of Civil Engineering, Czech Technical University, Thákurova 7, 166 29 Prague 6</wicri:regionArea><wicri:noRegion>166 29 Prague 6</wicri:noRegion></affiliation><affiliation></affiliation><affiliation wicri:level="1"><country wicri:rule="url">République tchèque</country></affiliation></author><author><name sortKey="Drchalova, Jaroslava" sort="Drchalova, Jaroslava" uniqKey="Drchalova J" first="Jaroslava" last="Drchalová">Jaroslava Drchalová</name><affiliation wicri:level="1"><country xml:lang="fr">République tchèque</country><wicri:regionArea>Department of Physics, Faculty of Civil Engineering, Czech Technical University, Thákurova 7, 166 29 Prague 6</wicri:regionArea><wicri:noRegion>166 29 Prague 6</wicri:noRegion></affiliation></author><author><name sortKey="Rovnan Kova, Pavla" sort="Rovnan Kova, Pavla" uniqKey="Rovnan Kova P" first="Pavla" last="Rovnan Ková">Pavla Rovnan Ková</name><affiliation wicri:level="1"><country xml:lang="fr">République tchèque</country><wicri:regionArea>Institute of Chemistry, Faculty of Civil Engineering, Technical University of Brno, Žižkova 17, 662 37 Brno</wicri:regionArea><wicri:noRegion>662 37 Brno</wicri:noRegion></affiliation></author></analytic><monogr></monogr><series><title level="j">Cement and Concrete Research</title><title level="j" type="abbrev">CEMCON</title><idno type="ISSN">0008-8846</idno><imprint><publisher>ELSEVIER</publisher><date type="published" when="2001">2001</date><biblScope unit="volume">31</biblScope><biblScope unit="issue">8</biblScope><biblScope unit="page" from="1129">1129</biblScope><biblScope unit="page" to="1140">1140</biblScope></imprint><idno type="ISSN">0008-8846</idno></series><idno type="istex">383EAD422A90D3500697FEDC0B68B9BB5608C4B3</idno><idno type="DOI">10.1016/S0008-8846(01)00556-7</idno><idno type="PII">S0008-8846(01)00556-7</idno><idno type="ArticleID">1770</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0008-8846</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Cycles</term><term>High-performance concrete</term><term>Hygric properties</term><term>Temperature</term><term>Thermal analysis</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Moisture diffusivity of two high-performance concretes used in concrete containment buildings of nuclear power plants is measured as a function of temperature up to 80°C, and the effects of high-temperature exposure up to 800°C and freeze/thaw cycles on its value are analyzed. The temperatures in the range of 0–80°C are found to have a moderate effect on the moisture diffusivities of both concretes, the typical increase being about 100–200% over the whole region. The high temperature exposure results in a much more significant increase of moisture diffusivity, up to three orders of magnitude, and the freeze/thaw exposure of 400 cycles to an increase up to one order of magnitude. As the main reason for the mentioned moisture diffusivity increase, the crack formation is identified. Both thermal decomposition accompanied by release of substantial amount of gaseous substances and water freezing in the porous system can damage the internal microstructure of the matrix due to the significant pressure increase in the porous body. The magnitude of changes of moisture diffusivity is found to be affected by the quality of aggregates rather than by the quality of cement. High quality quartzitic aggregates with very low porosity and very good mechanical properties perform much better than other more porous siliceous aggregates such as opal, and than the calcareous aggregates such as chalk.</div></front></TEI><affiliations><list><country><li>République tchèque</li></country></list><tree><country name="République tchèque"><noRegion><name sortKey=" Ern, Robert" sort=" Ern, Robert" uniqKey=" Ern R" first="Robert" last=" Ern">Robert Ern</name></noRegion><name sortKey=" Ern, Robert" sort=" Ern, Robert" uniqKey=" Ern R" first="Robert" last=" Ern">Robert Ern</name><name sortKey="Drchalova, Jaroslava" sort="Drchalova, Jaroslava" uniqKey="Drchalova J" first="Jaroslava" last="Drchalová">Jaroslava Drchalová</name><name sortKey="Rovnan Kova, Pavla" sort="Rovnan Kova, Pavla" uniqKey="Rovnan Kova P" first="Pavla" last="Rovnan Ková">Pavla Rovnan Ková</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Wicri/France/explor/LeHavreV1/Data/Main/Exploration
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 001757 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd -nk 001757 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien
|wiki= Wicri/France
|area= LeHavreV1
|flux= Main
|étape= Exploration
|type= RBID
|clé= ISTEX:383EAD422A90D3500697FEDC0B68B9BB5608C4B3
|texte= The effects of thermal load and frost cycles on the water transport in two high-performance concretes
}}
| This area was generated with Dilib version V0.6.25. |  |