Sorption of water on compacts of bottle-hydrated cement. I. The sorption and and length-change isotherms.

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DOIResolve DOI: http://doi.org/10.1002/jctb.5010140206
AuthorSearch for: ; Search for:
TypeArticle
Journal titleJournal of Applied Chemistry
ISSN0021-8871
Volume14
Pages8793; # of pages: 7
SubjectConcrete
AbstractI. To obtain information with regard to the porous structure of hydrated cement and the extentof its interaction with water, sorption and length-change isotherms were determined for this material.Compacts of bottle-hydrated cement were brought to equilibrium in a high-vacuum systemat various humidities, and measurements of the changes in length and weight during this process,were made to draw the isotherms.II. In order that the hydrated-cement-water sorption may be adequately analysed, two thermodynamicprocesses connected with the material, encountered in adsorption, are discussed.Thc B.E.T. surface are computed by the use of a modified form of the Gibbs adsorptionequation, is found to be in close agreement with the value obtained by an experirnental method ofdetermining zero adsorbed water. The surface area calculated from the pore-size distribution is also inagreement with these values. It is found that over the range of vapour pressures from 0 t o 25% theGibbs adsorption and Bangham equations are obeyed.
Publication date
LanguageEnglish
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedNo
IdentifierDBR-RP-218
NRC number7981
3364
NPARC number20375569
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Record identifier75cb641b-4506-4d09-bcca-ab3670a527d4
Record created2012-07-23
Record modified2016-05-09
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