http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
산업부산물(플라이애시)과 실리카퓸을 재활용한 숏크리트의 환경유해성 평가
박철우(Park Cheolwoo),심종성(Sim Jongsung),강태성(Kang Taesung),박성은(Park Seongeun) 대한토목학회 2010 대한토목학회논문집 C Vol.30 No.3
최근 산업발전에 따른 천연자원 고갈, 공해물질 배출, 폐기물 발생 등과 같은 부가적인 문제는 세계적으로 이슈화되고 있다. 현재 국내 산업부산물은 연간 600만 톤이 발생하며, 매립, 소각, 저장과 같은 1차원적인 처리에도 한계가 발생하고 있는 실정이다. 본 연구에서는 산업폐기물인 플라이애시 재활용 연구의 일환으로 플라이애시와 실리카퓸을 숏크리트에 활용하여 자원의 재활용 문제뿐만 아니라 숏크리트에 적용함으로써 플라이애시의 사용을 확대하고자 한다. 그러나 숏크리트에 적용하기에 앞서 최근 범지구적으로 이슈화되고 있는 환경문제에 보다 적극적으로 대처하기 위하여 환경유해성 평가가 반드시 필요하며, 본 연구에서는 예비 배합 및 압축강도 시험을 통해 도출한 10가지 배합에 대하여 화학성분 분석시험과 중금속 용출시험을 통해 환경 영향평가를 실시하였다. 압축강도 시험결과, 모든 배합에서 국내외 기준을 만족하는 것으로 나타났으며, 중금속 용출시험의 경우 Cr, Cd, Hg 성분은 검출되지 않고 Pb 성분은 플라이애시가 함유된 일부분의 경우에서만 검출되었다. 그리고 Cu, As 성분이 모든 배합에서 검출되었으나 국내외 기준에 모두 만족하는 결과를 얻을 수 있었다. The problems such as natural resource exhaustion, pollutant emission and waste generation are increasing worldwide with the industrial development. The quantity of the industrial by-product in Korea is 6 million tons a year, and even its basic treatment processes including landfill, incineration and storage have reached their limits. In this study, fly ash and silica fume were applied to shotcrete to develop a method for the reuse of resources and to increase the use of fly ash, which is an industrial waste. An environmental hazard evaluation is a must to actively address the worldwide environmental problems, though. Therefore, an environmental impact assessment was conducted using the chemical content analysis test and heavy metal exudation test, for ten mixtures that were obtained through the pre-mixing and compressive strength tests. The results of the compressive strength test showed that all mixtures satisfied national and international standards. Cr, Cd and Hg were not detected, and Pb was detected only in some cases with fly ash. Cu and As were detected in all mixtures, but all of them satisfied national and international standards.
심종성 ( Sim¸ Jongsung ),박철우 ( Park¸ Choelwoo ),박성재 ( Park¸ Sungjae ),강태성 ( Kang¸ Taesung ),박성은 ( Park¸ Seongeun ) 한국구조물진단유지관리공학회 2008 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.12 No.1
This study investigated fundamental properties of the recycled aggregate which was produced through recent hi-techniques of recycling. In addition, the mechanical properties of the concrete that used the recycled aggregate were compared th the concrete use the natural aggregate. The primary objective of this study was to characterize the concrete-rebar bonding properties of the recycled aggregate concrete. From the results of the mechanical property tests, as the recycled aggregate replacement ratio increased, the compressive strength and elastic modulus decreased. The recycled aggregate concrete showed about 18% decreased bond strength comparing to the concrete that had the same strength and used only the natural aggregate. The current bond strength prediction equation suggested by the design specification does not consider this decreased bong strength by the use of the recycled aggregate. Therefore, this study suggests a bond strength prediction equation for the recycled aggregate replacement ratio and consequent compressive strength reduction.
정용,박성은,황만식,홍지연 한국환경독성학회 1998 환경독성보건학회지 Vol.13 No.1
Ambient air levels of polycyclic aromatic hydrocarbons (PAHs) are of concern because of their potential for adverse health effects including transformation of some of these substances to mutagens and carcinogens by mammalian microsomal enzyme system. Airbone particulate samples were collected by a conventional high volume sampler and by an Anderson cascade impactor on 2 to 3 days in each month over a period of 1 year at a representative site of the heavy traffic area of Seoul from September 1994 to August 1995. Ten individual PAHs in sizable air particulates of each stage of two months were separated and analyzed by gas chromatography/mass spectrometry. As a results of analysis, the gross concentrations of PAHs in the fine and coarse particles were higher in the winter month than in the spring, followed in descending order by in the fall and summer. In a study of dependency of 10 PAIN compounds on size distribution of particles at heavy traffic area found that about 85% of the total PAHs content was associated with particles less than 2.0 um (fine particles) in diameter of winter sampling period, while 79% were associated with this size fraction during summer period. In according to the mean concentrations of the 10 PAHs in 7 size classification from <0.38 to > 10.1, the size was the smaller, PAHs concentration was the higher. Thus it was found that PAHs concentration was greatly affected by air particle size. Annual mean henzo(a)pyrene equivalents was 5.88ng/m³ and obtained by applying toxic equivalency factor developed by Nisbet and Lagoy.
공단지역 주민에서 휘발성 유기오염물질의 호흡기 노출에 대한 생체지표 평가
신동천,박성은,임영욱,양지연,김명수 한국환경독성학회 2000 환경독성보건학회지 Vol.15 No.3
Residents who live near petrochemical industrial areas are exposed to a variety of petrochemicals, including benzene or benzene-containing liquids. It is a serious concern because some VOCs are carcinogens naturally present in petroleum and gasoline. The aim of this study was to assess the exposure to VOCs, measured by personal/indoor/outdoor air sampling, and to estimate the relationship between the air samples and biological monitoring data. Through biological monitoring, we investigated VOCs in blood and s-phenylmercapturic acid (s-PMA), minor urinary metabolites of benzene. The external benzene exposure of subjects was measured using passive dosimeters and urinary s-PMA and blood-benzene were determined by GC/MS. More than 80% of subjects were detected for m-xylene, ethylbenzene, and toluene in blood samples and not detected at all for chloroform, 1, 1, 1-trichloroethylene, and tetrachloroethane. The mean concentration of benzene in the breathing zone of residents was 6.3 ㎍/m³, personal, indoor and outdoor concentrations were strongly correlated to each other. s-PMA detected in all subject samples was affected by personal exposure (p<0.05) and the level was different by age (p<0.01). Blood benzene was not affected by external benzene during these periods.