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Volume change on first drying of hydrated Portland cement with and without admixtures

From National Research Council Canada

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DOIResolve DOI: https://doi.org/10.1016/0008-8846(75)90105-2
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Affiliation
  1. National Research Council of Canada
FormatText, Article
SubjectAdmixtures; concrete admixtures; Portland cement; hydrated cement; shrinkage; relative humidity
Abstract
The effect of admixtures of several types on the volume change characteristics of Portland cement pastes is reported. Samples were cut in the form of wafers and dried step by step through several humidities down to 40 per cent; other samples were dried to the d-dried state. Large first drying shrinkages were obtained with extra dosages of calcium lignosulphonate, hydroxy carboxylic acids, and triethanolamine. Below 40 per cent RH all samples showed similar behavior with further drying or rewetting. It is suggested that the effect of admixture is mainly one of degree of dispersion in terms of alignment of sheets and displacement of ends of sheets.
Publication date
In
  • Cement and Concrete Research 5, no. January 1 (1 January 1975): 25–35.
LanguageEnglish
Peer reviewedYes
IdentifierDBR-RP-624
NRC numberNRCC 14409
NRC-IRC-3306
NPARC number20375875
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Record identifier671cc64b-d4ce-48c1-93c4-b1cc9ad0909b
Record created2012-07-23
Record modified2024-03-13
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