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RISS 인기검색어
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- 저자 : 강헌찬(H. C. Kang) (검색결과 5 건)
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재생골재를 콘크리트용 골재로 사용하기 위한 기초 물성 연구
공경록,강헌찬 東亞大學校 附設 環境問題硏究所 2004 硏究報告 Vol.26 No.-
This study research the method that it will be able to increase the demand of the quality of the construction waste and recycled aggregate. It includes a test for sieve analysis of aggregate, a test for specific gravity, a test for absorption, a test for impurity contents and crisis effect of cement paste of recycled aggregate. The grain size change of the 13~45mm recycled aggregate by the crusher when moving toward the 2nd cone crusher from the 2nd jaw crusher, the content change from 6.69% changed with 55.34%. The recycled aggregate of 13~45mm includes a standard grain size distribution. A test of impurity contents was resulted 1.49%. Density of the recycled aggregate of 13~45mm was 2.14g/㎤ and water absorption ratio was 7.74%. Content of the aggregate where the cement paste sticks below 50% changed 8.35% → 12.68% → 13.76% → 23.61% → 23.67% when first jaw crusher → second jaw crusher → first cone crusher → double screen → recycled aggregate of 13~45mm. The crisis of the recording aggregate which will be rough the crusher and the cement paste goes well. For the recycled aggregate production of quality the development of the system which separates the recycled aggregate is necessary.
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RFID 기술을 적용한 감염성폐기물 관리방안에 관한 연구
정양재,성닥창,강헌찬,강대성 동아대학교 환경문제연구소 2006 硏究報告 Vol.28 No.1
Recently. we are recognition that inflection of Infectious Wastes is dangerous. Management and handing of Infectious Wastes bring into relief. In this paper, we process using RFID(Radio Frequency Identification) that is the oncoming generation of high technology. real - time monitoring from a pollution source of Infectious Wastes to treatment of Infectious Wastes. The reason is solution the reinfection of Infectious Wastes illegal measure. Through this paper propose study, we offer a plan to slove inefficient business environment which is appeared management like computerization input to deal with paper working and wed application by management officer.
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간빌렉 가야바자르,공경록,강진구,강헌찬 동아대학교 환경문제연구소 2006 硏究報告 Vol.28 No.1
An experimental study was conducted to investigate the purification of waste gypsum. Waste gypsum, a by-product of the phosphoric acid industry, is contaminated with impurities of P₂O_(5), F, organic matter etc. In the case of waste gypsum concentrate, SO₃ content is higher than CaO content and it can be understood that it contains excess SO₃ constituent. In the case of waste gypsum residue, SiO₂ content is very high and also contents Al₂O₃, Fe₂O₃, and P₂O_(5) are generally below 1.5~2 wt.% and it is confirmed that CaO content is relatively less than that of SO₃content. As a result of crystal shape analysis of waste gypsum concentrate, quadrangle shaped gypsum crystals are tangled and formed circular shaped lumps. After grinding these lumps, each crystal takes its own shape of column or quadrangle and waste gypsum residue crystal can be observed as colored and column shaped. SEM analysis and XRD analysis results show that colored crystals of waste gypsum residue does not exist separately from gypsum crystals but gypsum crystals are the core parts of waste gypsum residue; in other words, lumps of gypsum crystals are tangled and it is considered that gypsum crystals exist as inclusion in the lumps. It can be understood from results DSC analysis of waste gypsum concentrate and reagent gypsum that waste gypsum has about 21.5% lower in its endothermic capacity, compared to reagent gypsum. 폐석고 는 국내의 여러 산업분야에서 약 400만톤 정도가 해마다 발생되고 있으며 현재 활용되지 못하고 방치되고 있는 양만도 2,000만톤 정도에 이르 고 있으며 Cd등 유해한 중금속이 환경 기준치 이상 함유되어있고"C 방사능 물질인 Rd가 함유 되어 있어서 라돈 가스의 유출로 매우 유해 하며 pH가 3 정도인 매우 강산성 물질이다. 국내에서는 석고의 부존자원이 전혀 없어 천연석고를 수입에 의존하고 있어 부생석고의 활용방안을 모색하는 것은 외화 의 절감뿐만 아니라 폐석고로 인한 심각한 환경오염문제를 해결하는데도 큰 도움이 될 수 있다. 이러한 폐석고가 처리 및 자원화 되지 못하고 있는 근본 적인 이유는 인산석고의 품위가 낮고, 중금속들 과 방사선물질이 함유되어 있기 때문에 효율적으로 자원화하기 위해선 무엇 보다도 정제처리에 경제성 있게 불순물 선별 기술 이 선결되어야 하며 따라서 본 연구자들은 이러한 인산 염 폐 석고 를 정제하여 물성 변화를 관찰하였다.
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간빌렉 가야바자르,공경록,강헌찬 동아대학교 환경문제연구소 2006 硏究報告 Vol.28 No.1
This study examined physical properties of purified phosphogypsum were compared trough thermal analysis, while crystallization change by temperature and time was analyzed by applying gypsum characteristic of crystallization change with temperature to phosphogypsum. From through observation of crystal change of waste gypsum by temperature, it is considered that hydrated gypsum changes to hemihydrated gypsum, in the case of three hours of heating at 170°C. Gypsum hemihydrate was formed by dehydrating waste gypsum in a water solution at(300℃) for (10min~120min) to form needle- like crystals. The large gypsum dehydrate was formed by higher the temperature of the gypsum hemihydrate suspension below. In the case of 300~1100°C heating, waste phosphogypsum forms Il-anhydrate gypsum, as the heating continues. The anhydration products were examined by SEM image and XRD analyses.
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RFID를 이용한 실시간 수질정보 관리 운영 시스템 개발
정양재,정병길,성낙창,강헌찬,강대성 東亞大學校 環境問題硏究所 2005 硏究報告 Vol.27 No.1
In this paper, an inspector measures the quality of water in contaminated place or anticipated place of pollution, or extracts polluted water and inspects the quality of water at an inspecting office by existing method of the quality of water analysis. These existing methods of the quality of water analysis are difficult to measure the quality of water with real time and they have some limits to measure the quality of water precisely. In this paper, to solve this problem, we propose a new method of the quality of water pollution measurement using a measuring instrument and RFID(Radio Frequency Identification). The whole system is processing automatically and through the real time analysis or monitoring, a supervisor processes analysis, measurement and supervision effectively.
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