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http://dx.doi.org/10.14481/jkges.2022.23.5.33

Engineering Properties of CB Cut-off Walls Mixed with GGBS  

Kim, Taeyeon (Dept. of Civil Engineering, Korea National University of Transportation)
Lee, Bongjik (Dept. of Civil Engineering, Korea National University of Transportation)
Publication Information
Journal of the Korean GEO-environmental Society / v.23, no.5, 2022 , pp. 33-39 More about this Journal
Abstract
For a slag-cement-bentonite (slag-CB) cut-off wall, GGBS replaces a part of the cement mixed to build a CB cut-off wall, which is used to block the flow and leakage of pollutants or groundwater; prevent seawater infiltration; and repair or reinforcement an aged embankments. Slag-CB cut-off walls are used in various applications in different fields where groundwater control is required due to its excellent characteristics. Such properties include high strength, low permeability, high durability and chemical resistance. However, despite these advantages, slag-CB cut-off walls are not extensively studied in Korea and thus are not applied in many cases. Particularly, GGBS, which replaces cement in a mixture, has different properties depending on its country of production. Consequently, it is necessary to perform various studies on slag-CB cut-off walls that use GGBS produced in Korea in order to increase its usability. This study has evaluated the bleeding rate, setting time, strength, and permeability in relation to the cement replacement rate of GGBS produced in Korea for slag-CB cut-off walls, with the aim to increase its usability. The evaluation found that slag-CB cut-off walls, made of a mixture containing GGBS produced in Korea, have a lower bleeding rate and permeability, and higher strengththan CB cut-off walls. It was also analyzed that such improved performance is more effective with a higher cement replacement rate of GGBS.
Keywords
Slurry wall; Slag-CB; GGBS; Replacement ratio; Permeability;
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Times Cited By KSCI : 2  (Citation Analysis)
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