지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
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Generation rate of construction wastes in Korea has occupied preponderantly in recent years. Although Korean government has made efforts to increase recycling rate, classification based on chemical properties of construction wastes has not been well defined. The objective of this study is to understand chemical properties of recycled concrete aggregate (RCA). RCA was tested for its leaching characteristics. Leaching tests were conducted the following procedures in Korean standard leaching test (KLT) and toxicity characteristics leaching procedure (TCLP), respectively. The RCA samples were characterized using X-ray fluorescence (XRF). Alkalinity of the leachate was determined using a pH meter titration method. The XRF analysis result shows that the calcium oxide (CaO) content in the RCA sample is 25.3～50.4 %. When the RCA sample was mixed with water in a batch reactor, pH in the solution was rapidly increased, and 70% of the total pH change was found in 1 hour. The TCLP showed slightly higher efficiency for leaching heavy metals than the KLT. The leaching efficiency was also higher as the particle size of RCA sample was smaller. The leaching test results suggest that RCA can be generally classified as non-hazardous waste.
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참고문헌 (24)
참고문헌 신청
American Public Health Association / 1998 / Standard methods for the examination of water and wastewater / American Water Works Association, Water Environment Federation : 2 ~ 29
Howard S. Peavy / 1998 / Environmental Engineering / McGraw-Hill : 27 ~ 31
Sergi, G. / 1986 / Corrosion of steel in concrete, Cement matrix variables / 박사 / Aston University
Skousen, Jeffrey G. / 1996 / Acid mine drainage control and treatment / West Virginia University : 159 ~ 162
U.S. Environment Protection Agency / 1986 / Toxicity Characteristic Leaching Procedure(TCLP) / Fed. Reg. 54 (216) : 40643 ~ 40653
Howard S. Peavy / 1998 / Environmental Engineering / McGraw-Hill : 27 ~ 31
Sergi, G. / 1986 / Corrosion of steel in concrete, Cement matrix variables / 박사 / Aston University
Skousen, Jeffrey G. / 1996 / Acid mine drainage control and treatment / West Virginia University : 159 ~ 162
U.S. Environment Protection Agency / 1986 / Toxicity Characteristic Leaching Procedure(TCLP) / Fed. Reg. 54 (216) : 40643 ~ 40653
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