한국결정성장학회지 (Journal of the Korean Crystal Growth and Crystal Technology)

  • 제25권5호
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  • Pages.199-204
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  • 2015
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  • 1225-1429(pISSN)
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  • 2234-5078(eISSN)
한국결정성장학회 (The Korea Association of Crystal Growth)
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인공경량골재 내부에 발생하는 방사형 균열의 억제 방법에 관한 연구

Study on the prevention methods of radial cracks generated in artificial lightweight aggregate

  • 강지민 (경기대학교 신소재공학과) ;
  • 김강덕 (경기대학교 신소재공학과) ;
  • 강승구 (경기대학교 신소재공학과)
  • Kang, Jimin (Department of Advanced Materials Engineering, Kyonggi University) ;
  • Kim, Kangduk (Department of Advanced Materials Engineering, Kyonggi University) ;
  • Kang, Seunggu (Department of Advanced Materials Engineering, Kyonggi University)
  • 투고 : 2015.09.23
  • 심사 : 2015.10.05
  • 발행 : 2015.10.31
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⟨ 이전 논문 다음 논문 ⟩

초록

본 연구에서는 잔사회와 준설토로 제조된 구형의 인공경량골재 내부에 생성되는 방사형 균열의 원인 및 그 억제 방법에 대하여 연구하였다. 인공경량골재는 잔사회와 준설토를 각각 7 : 3의 무게 비로 혼합하고 직경이 5~20 mm인 구 형태로 성형한 후 $1200^{\circ}C$에서 10분간 직화소성법으로 제조하였다. 골재 내부의 균열은 골재 지름이 작을수록 발생이 억제되었다. 또한 $SiO_2$ 분말을 첨가한 경우, 분말의 크기가 클수록 또는 첨가량이 증가할수록 방사형 균열 발생이 억제되었다. 균열이 억제된 인공경량골재의 비중은 1.3~1.6이고, 흡수율은 5~20 %의 범위를 나타내었다. 따라서 본 논문에서 제조된 인공경량골재는 건설 및 환경소재 등 여러 분야에 적용 가능할 것으로 보이며, 더불어 잔사회 및 준설토의 재활용율을 높이는데 크게 기여할 것으로 기대된다.

In this study, prevention methods of radial cracks generated inside of artificial lightweight aggregate made of reject ash and dredged soil were investigated. The reject ash and dredged soil had mixed with weight ratio of 7 : 3 and formed to spheric shape of 5~20 mm diameter, then, the aggregates were manufactured using flash sintering method at $1200^{\circ}C$ for 10 min. The formation of radial cracks in the aggregates were suppressed as the size of specimen decreased. Also, the addition of silica to aggregates had prevented generation of the radial cracks. As the size and the amount of silica powder added increased, the development of radial cracks was constrained. Therefore the artificial lightweight aggregate manufactured in this study expected to be applicable to many fields such as construction and environmental usages. Also it is expected to contribute greatly to increase the recycling rate of reject ash and dredged soil.

키워드

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