Early-age viscoelastic behavior of high performance concrete with internal curing

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Conference8th International Conference on Creep, Shrinkage and Durability of Concrete and Concrete Structures (CONCREEP8): 30 September 2008, ISE-Shima, Japan
Pages16; # of pages: 6
SubjectHigh performance / High strength concrete
AbstractA new analytical approach to determine the ageing creep coefficient of high performance concrete under restrained autogenous deformations is proposed. The results show that changes in creep coefficient under variable stress conditions can be determined from time of setting. These changes were very high shortly after the setting time and decreased to very small changes by the age of two days. The early-age viscoelastic behavior was also found to vary with the quantity of internal curing water provided in concrete through the use of presoaked lightweight aggregate for the prevention of self-desiccation. The early-age creep coefficients determined for high performance concrete under variable stress conditions were found to be more than 50% smaller than those predicted by existing creep models mainly developed from standard compressive creep tests on normal strength concrete. Predictions of developing concrete stresses using the creep coefficients de-termined experimentally with the proposed approach agreed very well with measured stresses.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number50443
NPARC number20377237
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Record identifierdb82f3f3-4354-419e-803d-0ae2460717d7
Record created2012-07-24
Record modified2016-05-09
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