The flow of helium into the interlayer spaces of hydrated portland cement paste

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DOIResolve DOI: http://doi.org/10.1016/0008-8846(71)90004-4
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TypeArticle
Journal titleCement and Concrete Research
ISSN0008-8846
Volume1
IssueMay 3
Pages285300; # of pages: 16
Subjectportland cement; helium; moisture content; hydrated cements; Concrete
AbstractA helium flow technique has been worked out whereby the changes occurring to hydrated portland cement as a result of the removal of interlayer water can be measured. Results were obtained at water-cement ratios of 0.4, 0.6, 0.8 and 1. 0. "Solid volume" measurements were also made. It was concluded that the spaces into which helium flowed were interlayer spaces and not fixed-dimension, narrow-necked pores. This work supported the mechanism discussed in the new model of hydrated portland cement on the sequence of water removal from the interlayer spaces and subsequent collapse of the spaces. An estimate of the density of the first 5.25% of the water removed from the 11% R.H. condition was made; this was 1.27 + or - 0.08 gm/cc.
Publication date
LanguageEnglish
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
IdentifierDBR-RP-476
NRC number11866
3297
NPARC number20375517
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Record identifierfc8098d6-3d66-4483-a3b0-8ef6036c4b7a
Record created2012-07-23
Record modified2016-05-09
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