Effect of polycarboxylate superplasticizer on contribution of interfacial transition zone to electrical conductivity of Portland cement mortars

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TypeArticle
Journal titleACI Materials Journal
Volume97
IssueJuly/August 4
Pages418424; # of pages: 7
Subjectsuperplasticizer, transition zone, mortar; Mortar; Admixtures
AbstractThe effect of a polycarboxylate high-range water-reducing admixture on the electrical conductivity and interfacial transition zone (ITZ) characteristics of portland cement mortars was evaluated using AC impedance spectroscopy, mercury intrusion porosimetry, and two electrical conductance models: the interfacial excess conductance and Bruggeman's asymmetrical effective medium theories. Mechanical tests were also performed. Mortar specimens used had sand-cement ratios (s/c) of 0.5, 1.0, and 1.5, aqueous high-range water-reducing admixture dosages 0, 0.3, and 0.75% (by mass of cement) and a water-cement ratio (w/c) of 0.35. The results showed that the presence of the polycarboxylate high
Publication date
LanguageEnglish
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number43124
9622
NPARC number20331242
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Record identifier0d4751d6-995d-4833-8a02-3873baa88520
Record created2012-07-18
Record modified2016-05-09
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