Variability of the nitrogen surface area of hydrated cement paste

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DOIResolve DOI: http://doi.org/10.1016/0008-8846(76)90058-2
AuthorSearch for:
TypeArticle
Journal titleCement and Concrete Research
ISSN0008-8846
Volume6
IssueJanuary 1
Pages139143; # of pages: 5
Subjecthydrated cement; nitrogen; drying; Concrete; ciment hydrate; azote; sechage
AbstractThe difference between the BET specific surface areas computed from water and nitrogen adsorption isotherms of bottle hydrated cement paste were found to vanish if special techniques for drying the samples were applied. Typical features of the methods were replacement of the pore water by methyl alcohol which in turn was substituted by pentane and final drying was achieved by distillation either in vacuo or above the critical temperature. The nitrogen and water surface areas of the specially dried paste are both approximately 200 m[2]/g. It is suggested that the commonly observed discrepancy in surface areas is due not to deficiencies of the measuring method but to real differences evoked by the particular drying technique applied.
Publication date
LanguageEnglish
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
IdentifierDBR-P-669
NRC number15220
2796
NPARC number20374495
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Record identifier27175741-6fab-4f36-b648-d1aa47eab9b5
Record created2012-07-23
Record modified2016-05-09
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