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J. Korean Ceram. Soc. > Volume 49(2); 2012 > Article
Journal of the Korean Ceramic Society 2012;49(2): 161.
doi: https://doi.org/10.4191/kcers.2012.49.2.161
승온 소성법을 이용한 균일 발포 특성을 갖는 인공경량골재의 제조
강민아, 강승구, 이기강, 김유택
경기대학교 신소재공학과
Fabrication of Artificial Light-weight Aggregates of Uniform Bloating Properties Using a Temperature-raising Sintering Method
Min-A Kang, Seung-Gu Kang, Gi-Gang Lee, Yoo-Tack Kim
Department of Advanced Materials Engineering, Kyonggi University
The temperature-rasing sintering method was used in this study to fabricate the aggregates of uniform pore size and distribution containing reject ash occurred in the thermal power plant. The spheric green aggregates made of reject ash were put into the box furnace of 800~$1000^{circ}C$, heated with a heating rate of 5~$15^{circ}C$/min to 1200~$1275^{circ}C$, sintered for 10 min and then discharged out of the furnace to the room temperature. The input temperature, heating rate and sintering temperature increased the bloating phenomenon of the specimen, and the sintering temperature among them was the most effective factor. The aggregate manufactured at $1275^{circ}C$ had the specific gravity of about 1.0 and water absorption of 1~2%, and the pores of 500~1,000 ${mu}m$ were uniformly distributed across the whole specimen. Especially, the aggregates fabricated using the temperature-rasing sintering method in this study showed an excellent bloating properties and uniform microstructure without black core phenomenon which is typical for the bloated ceramics synthesized by direct sintering method.
Key words: Artificial light-weight Aggregates, Temperature-raising sintering method, Uniform bloating, Reject ash
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