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http://dx.doi.org/10.5345/JKIBC.2016.16.4.305

Evaluation of Shrinkage and Creep Behavior of Low-Heat Cement Concrete  

Mun, Jae-Sung (Department of Architectural Engineering, Graduate School Kyonggi University)
Yang, Keun-Hyeok (Department of Plant.Architectural Engineering, Kyonggi University)
Kim, Si-Jun (Department of Plant.Architectural Engineering, Kyonggi University)
Publication Information
Journal of the Korea Institute of Building Construction / v.16, no.4, 2016 , pp. 305-311 More about this Journal
Abstract
This study examined the long-term inelastic characteristics, including unrestrained shrinkage and creep, of low-heat cement concrete under different ambient curing temperatures. To achieve the designed compressive strength of 42MPa, water-to-binder ratios were selected to be 27.5, 30, and 32.5% for curing temperatures of 5, 20, and $40^{\circ}C$, respectively. Test results showed that the shrinkage strains of concrete mixtures tended to decrease with the decrease in curing temperature because of the delayed evaporation of internal capillary and gel waters. Meanwhile, creep strains were higher in concrete specimens under lower curing temperature due to the occurrence of the transition temperature creep. The design models of KCI provision gave better accuracy in comparison with test results than those of ACI 209, although a correction factor for low-heat cement needs to be established in the KCI provision.
Keywords
long-term behavior; shrinkage; creep mass concrete; low-heat concrete;
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