Helium flow characteristics of rewetted specimens of dried portland cement paste

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DOIResolve DOI: http://doi.org/10.1016/0008-8846(73)90011-2
AuthorSearch for:
TypeArticle
Journal titleCement and Concrete Research
ISSN0008-8846
Volume3
IssueNovember 6
Pages777790; # of pages: 14
Subjectportland cement; hydrated cement; helium; wetting; water vapor; Concrete; ciment portland; ciment hydrate; helium; mouillage; vapeur d'eau
AbstractIn an effort to determine how and when water re-enters interlayer spaces the helium flow technique is applied to the dried hydrated portland cement system during re-exposure to water vapour. Two sets of samples at four water-cement ratios were exposed consecutively, to 11, 32, 42, 66, 84 and 100 per cent RH. After each exposure they were reconditioned to 11 per cent RH before measurements were made. Measurements were also taken following second drying. Results show that water re-enters the interlayer structure after exposure to the lowest humidity. Measurements following second drying show that rewetting regenerates the process that occurred on first drying.
Publication date
LanguageEnglish
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
IdentifierDBR-RP-575
NRC number13517
3303
NPARC number20375710
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Record identifieraf15a417-1bf0-4dc4-bae1-3d64d45c5a9e
Record created2012-07-23
Record modified2016-05-09
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