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Shrinkage and creep behavior of an alkali-activated slag concrete.
- Source :
-
Structural Concrete . Oct2017, Vol. 18 Issue 5, p801-810. 10p. - Publication Year :
- 2017
-
Abstract
- In this paper, experimental results about the shrinkage and creep behavior of an alkali-activated slag concrete ( AAS-concrete) are presented. The autogenous shrinkage of AAS-concrete is pronounced at a relatively high water to binder ratio of 0.41. The ultimate value of autogenous shrinkage is determined to be higher than that of high-strength concrete ( HSC). The observed self-desiccation at a later concrete age can be one of the reasons for the autogenous shrinkage. In a drying environment of 65% relative humidity AAS-concrete exhibits a significantly higher total shrinkage compared to normal-strength concrete composed of Portland cement. In the contrary to normal and HSC carbonation shrinkage must not be neglected for AAS-concrete in the early concrete age. The sum of drying and carbonation shrinkage develops much more rapidly for AAS-concrete in the first weeks after the beginning of drying. Based on the experimental results the shrinkage behavior of AAS-concrete cannot be predicted by conventional models. The creep behavior of the AAS-concrete was investigated under sealed and unsealed conditions. The creep coefficients for both conditions are higher than those calculated when using conventional models. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 14644177
- Volume :
- 18
- Issue :
- 5
- Database :
- Academic Search Index
- Journal :
- Structural Concrete
- Publication Type :
- Academic Journal
- Accession number :
- 125890812
- Full Text :
- https://doi.org/10.1002/suco.201600147