Effect of the pre-heating conditions on the formation of lightweight aggregates
1
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
This study was conducted to evaluate the feasibility of using bottom ash and dredged soil from power plants and electric arc furnace dust as primary materials for the production of artificial lightweight aggregates (ALAs). Preheating treatment was investigated as a means to prevent abnormal pore growth in ALAs, which occurs due to a vigorous bloating process. When the specimens were pre heated at 400 o C, absorbed water and interlayer water in the specimen were released before the sintering process, thus preventing cracks and breakage and thereby improving the quality of the ALA. However, when the specimens were preheated at 700 o C, more CO2 and CO gases were generated owing to oxidation. As a result, abnormal water absorption drift was suppressed, and the water absorption rate was controlled to be within an acceptable range.
Abstract
This study was conducted to evaluate the feasibility of using bottom ash and dredged soil from power plants and electric arc furnace dust as primary materials for the production of artificial lightweight aggregates (ALAs). Preheating treatment was investigated as a means to prevent abnormal pore growth in ALAs, which occurs due to a vigorous bloating process. When the specimens were pre heated at 400 o C, absorbed water and interlayer water in the specimen were released before the sintering process, thus preventing cracks and breakage and thereby improving the quality of the ALA. However, when the specimens were preheated at 700 o C, more CO2 and CO gases were generated owing to oxidation. As a result, abnormal water absorption drift was suppressed, and the water absorption rate was controlled to be within an acceptable range.
참고문헌 (9)
- "2000 the Whole Country Wasters Product and TreatmentPresent, 11-1480000000533-10", Ministry of Environment, ~ (2001)
- M. H. Ahnn, , J. Kor. Solid Wastes Eng. Soc, 14, pp.221~225 (1997)
- J. -S. Hwang, , J. Kor. Solid Wastes Eng. Soc, 13, pp.96~107 (1996)
- N. W. Lim, , J. Kor. Solid Wastes Eng. Soc, 13, pp.108~118 (1996)
- C. K. Park, , J. Kor. Solid Wastes Eng. Soc, 14, pp.901~909 (1997)
- S. K. Lee, , J. Kor. Solid Wastes Eng. Soc, 16, pp.451~458 (1999)
- J. Aota, "EAF Dust Treatment", U.S Patent, 567146, ~ (1997)
- C. M. Riely, , J. Amer. Ceram. Soc, 34, pp.121~128 (1951)
- Y. Qi, , J. Hazardous Materials, 176, pp.76~84 (2010)