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http://dx.doi.org/10.4334/JKCI.2013.25.6.593

Evaluation of Shrinkage Strain of Alkali-Activated Slag Concrete  

Yang, Keun-Hyeok (Dept. of Plant.Architectural Engineering, Kyonggi University)
Seo, Eun-A (Dept. of Architectural Engineering, Kyonggi University Graduate School)
Publication Information
Journal of the Korea Concrete Institute / v.25, no.6, 2013 , pp. 593-599 More about this Journal
Abstract
The unrestrained shrinkage strain of alkali-activated (AA) slag concrete was examined and compared with design equations specified in code provisions and empirical equations proposed by Yang et al. The main parameters investigated were the water-to-binder ratio (W/B), unit water content and fine aggregate-to-total aggregate ratio (S/a). Test results revealed that shrinkage strain of AA slag concrete is nearly proportional to the W/B ratio, whereas its time function is independent of the W/B ratio. The shrinkage strain of AA slag concrete increased significantly when the unit water content is above $185kg/m^3$, whereas it is marginally affected by the S/a ratio. The design equation of ACI 209 considerably overestimates the shrinkage behavior of AA slag concrete, whereas CEB-FIP equation tends to underestimate the shrinkage at the age more than 28 days. The empirical equation of Yang et al. is in better agreement with test results, showing that values of mean and standard deviation of error coefficients obtained from each specimen are 016 and 0.07, respectively.
Keywords
AA slag concrete; shrinkage strain; water-to-binder ratio; unit water content; time function;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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