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http://dx.doi.org/10.5345/JKIBC.2020.20.5.399

A Fundamental Research on Determining Segregation Boundary using Rheological Parameters for 21 and 24MPa grade of Normal Strength Concrete  

Lee, You-Jung (Department of Architectural Engineering, Gyeongsang National University)
Lee, Young-Jun (Department of Architectural Engineering, Gyeongsang National University)
Han, Dongyeop (Department of Architectural Engineering, and Engineering Research Institute, Gyeongsang National University)
Publication Information
Journal of the Korea Institute of Building Construction / v.20, no.5, 2020 , pp. 399-407 More about this Journal
Abstract
The aim of the research is to provide the boundary conditions for segregation of normal strength grade and high fluidity concrete mixture (so called mid-fluidity concrete) with rheology parameters. Since the normal strength grade concrete mixture has a relatively high water-to-cement ratio and no SCMs, it is easy to be segregated when superplasticizer is added. Hence, to achieve the mid-fluidity concrete of normal strength grade and high fluidity, preventing segregation of the mixture is inevitable. In this research, using two superplasticizers with different solid concentrations, the flow behaviors and rheological behaviors were assessed by increasing fluidity until the segregation happened. According to the experiment in this research, an unusual behavior in rheology parameters was observed when the concrete mixture started to be segregated. From this results and report, it is expected to contribute on the definition of segregation with rheological test methods.
Keywords
mid-fluidity concrete; rheology; segregation resistance; superplasticizer; solid concentration;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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