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http://dx.doi.org/10.14190/JRCR.2014.2.1.060

Autogenous Shrinkage Properties of High Strength Alkali Activated Slag Mortar  

Oh, Sang-Hyuk (Department of Civil, Architectural and Environmental System Engineering, Sungkyunkwan University)
Hong, Sung-Hyun (Department of Civil, Architectural and Environmental System Engineering, Sungkyunkwan University)
Lee, Kwang-Myong (Department of Civil, Architectural and Environmental System Engineering, Sungkyunkwan University)
Publication Information
Journal of the Korean Recycled Construction Resources Institute / v.2, no.1, 2014 , pp. 60-65 More about this Journal
Abstract
Recently, lots of researches on alkali-activated slag (AAS) concrete have been carried out to resolve the environmental issues such as recycling by-products and global warming. AAS concrete would have high strength and high level of durability. On the other hand, it is known that large amount of shrinkage occurred in AAS concrete due to rapid alkaline reaction in the early age, and however, the related studies about autogenous shrinkage of high strength AAS mortar are relatively rare. In this study, fresh mortar properties such as flow and setting time, compressive strength and autogenous shrinkage of AAS mortar with W/B=0.40 to 0.50, were measured. AAS mortar was activated with sodium silicate (Ms=1.0) with 5, 6 and 7 % of $Na_2O$. Test results revealed that AAS morar shows larger autogenous shrinkage than OPC mortar and the lower W/B of AAS mortar, the greater autogenous shrinkage. Therefore, the application of appropriate curing and the use of shrinkage reduction admixture would be needed to reduce autogenous shrinkage of AAS mortar.
Keywords
Alkali Activated Slag Mortar; Compressive Strength; Autogenous Shrinkage;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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