Effect of aggregate size on transition zone properties at the portland cement paste interface

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DOIResolve DOI: http://doi.org/10.1016/0008-8846(91)90059-Q
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TypeArticle
Journal titleCement and Concrete Research
Volume21
Issue6
Pages9991005; # of pages: 7
SubjectConcrete
AbstractStructural features of the transition zone between granular aggregate and portland cement paste were studied. Two types of aggregates were used, quartz and limestone. The transition zones are structurally characterized by a parameter referred to as "interfacial excess conductance" based on electrical conductivity methods. The experimental results indicate that the transition zone between quartz particles and portland cement paste is always less dense than bulk paste, regardless of the aggregate size, and that the thickness of this transition zone decreases with the decreasing of the aggregate size. The same general features occur for the transition zone between larger limestone particles and portland cement paste. A transition zone denser than bulk paste occurs, however, for much smaller limestone particles due possibly to chemical interaction between the limestone particles and portland cement paste.
Publication date
LanguageEnglish
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
IdentifierIRC-P-3137
NRC number35504
3410
NPARC number20329002
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Record identifierf74ded0b-5ded-4dee-8b1a-5432884792b0
Record created2012-07-18
Record modified2016-05-09
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