Freezing of water in portland cement paste - an a.c. impedance spectroscopy study

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DOIResolve DOI: http://doi.org/10.1016/S0958-9465(01)00078-6
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TypeArticle
Journal titleCement and Concrete Composites - Special Edition on Application of Electrical Methods
Volume24
Pages467475; # of pages: 9
Subjectfreezing, water, cement paste, impedance; Concrete
AbstractThe freezing of water in Portland cement paste was investigated using a.c. impedance spectroscopy techniques. Length change and impedance measurements on cooling and warming were obtained simultaneously using a specially designed coupling technique. A new descriptor of frost resistance isdescribed in terms of the high frequency arc depression angle in the impedance plane. Curves of the depression angle parameter ? versus temperature are shown to be indicative of the pore structure and its effect on mass transfer of water and nucleation and growth of ice crystals. The ? - temperature andresistance-temperature curves are used in combination to assess structural damage. Results are compared with those obtained for model pore systems i.e. vycor glass and clay brick.
Publication date
LanguageEnglish
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number44492
13987
NPARC number20386364
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Record identifier14fc4dea-ce37-4640-833d-9ca2929806f6
Record created2012-07-25
Record modified2016-05-09
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