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J. Korean Ceram. Soc. > Volume 39(12); 2002 > Article
Journal of the Korean Ceramic Society 2002;39(12): 1133.
doi: https://doi.org/10.4191/kcers.2002.39.12.1133
폐콘크리트 미분말을 이용한 유해 폐기물 고화용 시멘트의 제조
김인섭, 원종한, 최광휘, 최상흘, 이종규1, 손진군2, 심광보
한양대학교 세라믹공학과
1요업기술업 세라믹${\cdot}$건재부
2포항산업과학연구원 자원활용연구팀
Fabrication of the Cement for the Solidification of the Toxic Waste using Waste Concrete Powder
In-Seob Kim, Jong-Han Won, Kwang-Hui Choi, Sang-Hul Choi, Jong-Gyu Lee1, Jin-Gun Sohn2, Kwang-Bo Shim
Department of Ceramic Engineering, Hanyang University
1Ceramic${\cdot}$Building Materials Department, KICET
2Environment Energy Research Division, Materials Utilization Research Team, RIST
The cement for solidification of the toxic waste was fabricated using a mixture of the waste concrete powder and blast furnace slag in the ratio of 1:1 and its hydrate morphology and compressive strength of the sample were evaluated in order to apply to the solidification of the COREX sludge. The X-ray diffraction analysis of the sample which prepared by the addition of 10% Portland cement and hemihydrate showed the presence of $Ca(OH)_2$, ettringite, gel-phase and C-S-H hydrate. Compressive strength of the sample exhibited enough high to use as a solidification cement. The strength of the sample was over 140 kgf/$m^2$ in 7 days in case of solidification of the COREX sludge and the sample possess sufficient morphology for the solidification and stabilization of the waste sludge.
Key words: Solidification, Waste concrete, COREX sludge, Blast furnace slag, XRD
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