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J. Korean Ceram. Soc. > Volume 51(4); 2014 > Article
Journal of the Korean Ceramic Society 2014;51(4): 300.
doi: https://doi.org/10.4191/kcers.2014.51.4.300
석탄 저회로 제조한 인공토양의 기능성 건설재 적용 가능성
김강덕, 이영생1
경기대학교 신소재공학과
1경기대학교 토목공학과
Application for Functional Construction Materials of Artificial Soil Manufactured Using Coal Bottom Ash
Kangduk Kim, Yeongsaeng Lee1
Department of Advanced Materials Engineering, Kyonggi University
1Department of Civil Engineering, Kyonggi University
ABSTRACT
To recycle coal bottom ash(denoted here as CBA) generated from thermal power plants as a functional construction material, artificial soil(denoted as AS) containing CBA with dredged soil(denoted as DS) at a ratio(wt%) of 70 : 30 was manufactured by means of material engineering with sintering in a rotary kiln at $1125^{circ}C$ using a green body formed via extrusion processing. The properties of the soil mechanics of the AS and the as-received CBA were analyzed and compared. Compaction testing results determined an optimum moisture content of the AS and CBA at 18%. During these tests, the maximum dry unit weights of the materials were similar, at 1.57 and 1.58 $t/m^3$, respectively. The compressive strength levels of the AS and CBA concrete specimens were 5.1 and 5.4 $t/m^3$, respectively, both of which increased after materials engineering processing. In a consolidation test, the compression index of the AS and CBA was found to be $0.114{pm}0.001$ in both cases. The values were similar regardless of the materials engineering processes, but during the consolidation of AS, its coefficient was higher than that of the CBA materials.
Key words: Coal bottom ash, Soil, Compressive strength, Compression index, Consolidation coefficient, Functional construction materials
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