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http://dx.doi.org/10.14190/JRCR.2017.5.1.068

Effects of Chemical Admixture on the Quality Characteristics of Grout for Prestressed Concrete  

Koh, Kyung-Taek (Korea Institute of Construction Technology)
Ryu, Gum-Sung (Korea Institute of Construction Technology)
Ahn, Ki-Hong (Korea Institute of Construction Technology)
Publication Information
Journal of the Korean Recycled Construction Resources Institute / v.5, no.1, 2017 , pp. 68-75 More about this Journal
Abstract
The study investigates the effects of the content and using method of chemical admixtures such as superplasticizer and viscosity modifying admixture on the fluidity, bleeding ratio, volumetric change and compressive strength of the grout in order to provide basic data for the development of high-quality grout for prestressed concrete. It appeared that the combination of superplasticizer and viscosity modifying admixture decreased the fluidity of grout with small content of superplasticizer. On the contrary, Grout used more than 0.1% of superplasticizer appeared to have significant effect on the improvement of the fluidity. On the other hand, bleeding of grout reduced according to increasing the content of viscosity modifying admixture. Superplasticizer with less than 0.05% had practically no effect on the reduction of bleeding, whereas superplasticizer with more than 0.1% appear to have significant effect on the reduction of bleeding. Also the combination of superplasticizer with 0.15% and viscosity modifying admixture with 0.15% resulted in satisfactory fluidity accompanied with fair reduction of bleeding and shrinkage of the grout.
Keywords
Grout; Prestressed concrete; Chemical admixture; Bleeding; Fluidity;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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