Diffusion of water and methanol vapor in hydrated Portland cement paste

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TypeArticle
Journal titleAdvances in Cement Research
Volume18
IssueOctober 4
Pages153160; # of pages: 8
Subjectadsorption, water, methanol, vapor, cement paste; Concrete
AbstractEquations are developed to describe the combined effect of diffusion and adsorption of water and methanol vapor in hydrated cement paste. The dynamic equation of flow is obtained by equating the space derivative of the spreading pressure of the adsorbed film to a resistive force equal to the product of the coefficient of resistance and the velocity of the film. Qualitative agreement is found for the diffusion of water and methanol vapor through cement paste when the BET and Langmuir equations respectively are used for adsorption. The diffusion of methanol vapor is underestimated due to intercalation and chemical interaction effects. The validity of Fick's law is discussed.
Publication date
LanguageEnglish
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number46715
18021
NPARC number20377614
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Record identifierc4e00217-54d7-4532-8238-630a347e53aa
Record created2012-07-24
Record modified2016-05-09
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