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http://dx.doi.org/10.5345/JKIBC.2017.17.4.313

Use of Flue Gas Desulfurization Gypsum as an Activator for a Ground Granulated Blast Furnace Slag  

Lee, Hyun-Suk (Department of Architectural Engineering, Pukyong National University)
Kim, Ji-Hyun (Department of Architectural Engineering, Pukyong National University)
Lee, Jae-Yong (Department of Architectural Engineering, Pukyong National University)
Chung, Chul-Woo (Department of Architectural Engineering, Pukyong National University)
Publication Information
Journal of the Korea Institute of Building Construction / v.17, no.4, 2017 , pp. 313-320 More about this Journal
Abstract
Flue gas desulfurization gypsum(FDG) is produced when removing sulfur oxides from combustion gas generated by coal power plant. However, the recycling of FDG is still limited to the certain purposes. In order to expand the possible application of FDG, this study aims to utilize FDG as an activator for ground granulated blast furnace slag. FDG produced by dry- and wet-process were used for the experiments. Slag paste specimens were produced by mixing with deionized water and simulated pore solution, and the role of FDG as an activator for blast furnace slag was evaluated using hydration study by XRD analysis and compressive strength development. According to the results, dry-type FDG was found to work as an activator for blast furnace slag without the presence of soluble alkalis. However, wet-type FDG needs assistance by soluble alkalis in order to work as an activator for blast furnace slag. It was also found that the substitution of dry- and wet-type FDG into blast furnace slag can increase the 28 day compressive strength of slag paste. It is expected that efficient and economical recycling of FDG will be possible if quantitative analysis of strength enhancement according to substitution rate of both dry- and wet-type FDG.
Keywords
flue-gas desulfurization gypsum; dry-type; wet-type; blast furnace slag; activator;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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