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http://dx.doi.org/10.7733/jnfcwt.2018.16.1.83

Characteristics of Solidified Cement of Electrokinetically Decontaminated Soil and Concrete Waste  

Koo, Daeseo (Korea Atomic Energy Research Institute)
Sung, Hyun-Hee (Korea Atomic Energy Research Institute)
Hong, Sang Bum (Korea Atomic Energy Research Institute)
Seo, Bum Kyoung (Korea Atomic Energy Research Institute)
Publication Information
Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT) / v.16, no.1, 2018 , pp. 83-91 More about this Journal
Abstract
While using an electrokinetic method to analyze the characteristics of cement solidification of radioactive wastes from decontaminated uranium soil and concrete, the compressive strength, pH, electrical conductivity, irradiation effects, and volume expansion were measured for the solidified cement specimens. The workability of cement solidified from radioactive waste was about 170-190%. After the solidified cement was irradiated, the compressive strength decreased by about 15%, but met the criteria ($34kgf{\cdot}cm^{-2}$) of KORAD (Korea Radioactive Waste Agent). According to the results of SEM-EDS for solidified cement, the aluminum phase was well combined with cement, while the calcium phase was separated from cement. The volume of solidified cement in radioactive wastes was dependent on the waste-to-cement ratio and the amount of water, and increased by about 30% under the conditions used in this study. Therefore, it was concluded that permanent disposal of electrokinetically decontaminated radioactive wastes is appropriate.
Keywords
Cement solidification; Radioactive waste; Compressive strength; Volume expansion; Waste acceptance criteria;
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Times Cited By KSCI : 1  (Citation Analysis)
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