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A study of the water vapor sorption isotherms of hardened cement pastes: Possible pore structure changes at low relative humidity and the impact of temperature on isotherms
Technical University of Denmark, Denmark.
Technical University of Denmark, Denmark.
Norwegian University of Science and Technology, Norway.
2014 (English)In: Cement and Concrete Research, ISSN 0008-8846, E-ISSN 1873-3948, Vol. 56, p. 97-105Article in journal (Refereed) Published
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Abstract [en]

Using water vapor sorption isotherms measured by the “dynamic vapor sorption” (DVS) method, a resaturation study was conducted to investigate possible pore structure changes of hardened cement paste samples caused by the drying at low relative humidity during desorption measurements. The results indicate that either the relatively short term drying does not cause any microstructure changes or the pore structure of the hardened cement paste samples can be restored during the absorption process. Additionally, the temperature dependency of sorption isotherms was investigated using both hardened cement paste samples and a model material MCM-41. The pronounced impact of temperature on desorption isotherms of cement based materials as reported in literature was not found in this investigation. The results suggest that the differences between the sorption isotherms measured at different temperatures are mainly caused by the temperature dependent properties of water.

Place, publisher, year, edition, pages
2014. Vol. 56, p. 97-105
Keywords [en]
Adsorption (C), cement paste (D), microstructure (B), temperature (A), isotherms
National Category
Civil Engineering
Research subject
Technology (byts ev till Engineering), Civil engineering
Identifiers
URN: urn:nbn:se:lnu:diva-48693DOI: 10.1016/j.cemconres.2013.11.008OAI: oai:DiVA.org:lnu-48693DiVA, id: diva2:893429
Available from: 2016-01-12 Created: 2016-01-12 Last updated: 2017-11-30Bibliographically approved

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Johannesson, Björn

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  • apa
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  • vancouver
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  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf