The Early age short-term creep of hardening cement paste: load-induced hydration effects

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DOIResolve DOI: http://doi.org/10.1016/S0958-9465(03)00079-9
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TypeArticle
Journal titleCement and Concrete Composites
Volume26
IssueJuly 5
Pages481489; # of pages: 9
Subjectcreep, shrinkage, load-induced hydration, miniature loading system; Concrete
AbstractShort-term creep and shrinkage strains were monitored at early age on hydrated Portland cement pastes prepared with two different water-cement ratios (0.35 and 0.50). Creep experiments were conducted in an environmentally controlled chamber maintained at (96 ± 2)% relative humidity. The three ages at loading investigated were 18, 24 and 30 hours. The stress- strength ratio applied to the specimens at the age of loading, using a miniature loading system, was 0.30. Cement paste specimens were in the form of ?T-shaped? columns with a minimum thickness value (for the web and flanges) of less than 1.2 mm. Load-induced hydration (not normally considered in creep prediction) of normal strength cement paste (w/c=0.50) was found to occur at early times following the loading at 18 hours. An analytical model was developed in order to predict the creep coefficient of normal and high strength cement pastes from early age data. The model accounts for load-induced hydration effects.
Publication date
LanguageEnglish
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number45703
14970
NPARC number20378797
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Record identifierc258004a-65e1-4326-adfe-0343e0cdce47
Record created2012-07-24
Record modified2016-05-09
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