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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 구형태로 성형한 후 1200℃에서 10분간 직화소성법으로 제조하였다. 골재 내부의 균열은 골재 지름이 작을수록 발생이 억제되었다. 또한 SiO₂분말을 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℃ 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.
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℃ 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.
권호기사
참고문헌 (19건) : 자료제공( 네이버학술정보 )
| 번호 | 참고문헌 | 국회도서관 소장유무 |
|---|---|---|
| 1 | 1 ] Y.D. Jo, “Electric industry and environmental effect”, Korea Electric Association, Electricity Almanac (2009)p. 343. | 미소장 |
| 2 | Fabrication of Artificial Light-weight Aggregates of Uniform Bloating Properties Using a Temperature-raising Sintering Method | 소장 |
| 3 | 3 ] M.A. Kang and S.G. Kang, “Effect of activated carbon on bloating properites of artificial lightweight aggregates containing coal reject ash and bottom ash”, J. Korean Cryst. Growth Cryst. Technol. 23 (2013) 201. | 미소장 |
| 4 | 4 ] S.J. Kim and J.B. Park, “Treatment, disposal, and reuse of contaminated dredged sediment in the ocean”, J. Kor. Soc. of Civil Engineers. 55 (2007) 66. | 미소장 |
| 5 | 5 ] S.G. Kang, “Dependence of physical properties of artificial lightweight aggregates upon a flux and a bloating agent addition”, J. Korean Cryst. Growth Cryst. Technol. 19 (2009) 48. | 미소장 |
| 6 | 6 ] K.G. Lee, “Bloating mechanism for coal ash with iron oxide”, J. Korean Cryst. Growth Cryst. Technol. 24(2014) 77. | 미소장 |
| 7 | The effects of aggregate properties on lightweight concrete  |
미소장 |
| 8 | Effect of lightweight aggregates on the mechanical properties and brittleness of lightweight aggregate concrete |
미소장 |
| 9 | Mix design and properties of concrete made from PFA coarse aggregates and sand |
미소장 |
| 10 | Y. Ke, A.L. Beaucour, S. Ortola, H. Dumontet and R. Cabrillac, “Influence of volume fraction and characteristics of lightweight aggregates on the mechanical properties of concrete”, Construct Build Mater 23 (2009)2821. | 미소장 |
| 11 | J.W. Moon, J.P. Won and H.K. Jeon, “The application and case of lightweight concrete”, Korea Concrete Institute Conference 5 (2006) 224. | 미소장 |
| 12 | J.M Kang and S.G. Kang, “Behavior of radial cracks generated inside artificial lightweight aggregate manufactured from reject ash and dredged soil”, International Journal Precision Engineering and Manufacturing 16 (2015) 1329. | 미소장 |
| 13 | Oxidation of black core during firing of ceramic ware: 4 Relationship between effective diffusivity of oxygen through oxidised layer and properties characterising its porous structure |
미소장 |
| 14 | J.Y. Park, Y.T. Kim, K.G. Lee, S.G. Kang and J.H. Kim, “The mechanism of black core formation”, J. Korean Cryst. Growth Cryst. Technol. 15 (2005) 208. | 미소장 |
| 15 | V.Z. Abdrakhimov and E.C. Abdrakhimova, “Formation of the black core in high-speed firing of floor tiles”, Glass and Ceramics 56 (1999) 30. | 미소장 |
| 16 | Sandwich structures in the Etruscan-Padan type pottery |
미소장 |
| 17 | Y.R. Ryu and Y.T. Kim, “A study on the characteristics of ecological lightweight aggregates containing reject ash from the power plant”, J. Korean Cryst. Growth Cryst. Technol. 20 (2010) 185. | 미소장 |
| 18 | Properties and microstructure of lightweight aggregate produced from sintered sewage sludge ash |
미소장 |
| 19 | S.N. Jo and S.G. Kang, “A study on the properties of artificial aggregates containing bottom ash from the power plant and waste catalyst slag”, J. Korean Cryst. Growth Cryst. Technol. 22 (2012) 200. | 미소장 |
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