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J. Korean Ceram. Soc. > Volume 36(7); 1999 > Article
Journal of the Korean Ceramic Society 1999;36(7): 725.
슬래그를 이용한 중금속 이온의 고정화
강성근, 방완근1, 이승헌2, 김창은
연세대학교 세라믹공학과
1연세대학교 첨단재료연구소
2군산대학교 재료공학과
A Study on the Stabilization/ Solidification Process Using Blast Furnace Slag
ABSTRACT
It is a fundamental experiment to use blast-furnace slag in solidification/stabilization process. The compressive strength and leaching test of Pb and Cr doped samples were evaluated and the effects of heavy-metal ions on the hydration of slag was investigated. Sodium silicates(5wt%) was added as alkali-activator and the effects of replacing a part of slag with flyash or gypsum was also discussed. Pb ion was solidified by encapsulation of matrix. In of slag${pm}$gypsum binder microstructure was densified by accelerating to form AFt/AFm phase and compressive strength was improved resulting in reducing leaching amount of Pb ion. Cr ion was solidified by substituting with Al ion in aluminate product. Slag+fly ash binder improved compressive strength and decreased leaching amount of Cr ion.
Key words: Slag, Solidification, Stabilization process, Pb
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