The significance of helium diffusion measurements in studying the removal of structural water in inorganic hydrated systems

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DOIResolve DOI: http://doi.org/10.1016/0008-8846(78)90011-X
AuthorSearch for: ; Search for:
TypeArticle
Journal titleCement and Concrete Research
ISSN0008-8846
Volume8
IssueMarch 2
Pages22331; # of pages: 193
Subjecthelium; hydrated cement; drying; Concrete
AbstractHelium diffusion studies were made on six different inorganic hydrated systems: portland cement, magnesium oxysulfate, magnesium oxychloride, tricalcium silicate, gypsum and selected molecular sieves. The helium intake versus time curves obtained after structural water was removed incrementally, starting at 11% RH, provided data that enabled an assessment of the changing character of the solid phase. Changes in solid volume and solid density were monitored as water was removed from these systems. Factors influencing physico-chemical processes such as structural collapse due to removal of interlayer or compositional water are discussed with reference to the systems studied. This comparative study also provided a further elucidation of the factors that affect the relocation of the water molecule into the structure.
Publication date
LanguageEnglish
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
IdentifierDBR-P-754
NRC number16505
3313
NPARC number20375597
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Record identifier72833942-221b-4339-ad25-959b390fde71
Record created2012-07-23
Record modified2016-05-09
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