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유닛 커튼월 프로파일 형상에 따른 단열성능에 관한 연구
정의인 ( Jung Ui-in ),홍상훈 ( Hong Sang-hun ),김해나 ( Kim Hae-na ),박준서 ( Park Jun-seo ),김봉주 ( Kim Bong-joo ) 한국건축시공학회 2023 한국건축시공학회 학술발표대회 논문집 Vol.23 No.1
The unit curtain wall is an exterior finish currently used on the exterior walls of high-rise buildings. Curtain walls used as non-endurance walls are largely classified into stick curtain walls and unit curtain walls, and their use has recently been on the rise to reduce risks at construction sites through factory manufacturing. Accordingly, this study attempted to examine the insulation performance according to the shape of the unit curtain wall profile through insulation simulation.
굴 패각을 잔골재로 사용한 모르타르의 물시멘트비에 따른 강도특성
정의인 ( Jung Ui-in ),최인권 ( Choi In-kwon ),허민회 ( Heo Min-hoe ),김봉주 ( Kim Bong-joo ),원철희 ( Won Chul-hee ),최호림 ( Choi Ho-rim ) 한국건축시공학회 2016 한국건축시공학회 학술발표대회 논문집 Vol.16 No.2
Oyster shell is light weighted and its strength characteristic is similar to sand. So we produced mortar test piece using grounded oyster shell powder under 0.5mm, which is a standard of fine aggregate, and reviewed strength properties according to water cement ratio. In our test, we used two kinds of oyster shell particles: below 0.6㎜ and 1.2~2.5㎜. Water cement ratio is varied 40% to 100% and we found that flexural strength and compressive strength are decreased in higher water cement ratio.
굴 패각과 건식공정 바텀애시를 사용한 내화보드의 가열실험
정의인 ( Ui-in Jung ),김봉주 ( Bong-joo Kim ),김진만 ( Jin-man Kim ) 한국건축시공학회 2016 한국건축시공학회지 Vol.16 No.3
본 연구는 산업폐기물로 발생되는 굴 패각과 건식공정바텀애시를 골재로 활용하여 제작된 내화보드의 가열실험을 통한 성능에 관한 연구이며 다음과 같은 결론을 도출하였다. 전기로 가열실험을 통해 나타난 시험편의 이면온도는 300℃ 가열상황에서 103.1℃∼125.1℃로, 600℃의 가열상황에서 201.1℃∼210.1℃로, 900℃의 가열상황에서 249.2℃∼276.9℃의 범위로 나타났다. 내화보드 시험편의 경우 일정온도상승 이후 유지되는 것으로 나타나 사용재료들의 경우 내화성능이 발휘되는 것으로 판단된다. 실험의 결과로 유추할 때, 입자의 크기가 작을 경우 600℃까지는 내화성능이 상대적으로 우수하지만, 그 이상의 온도에서는 입자의 크기가 큰 경우 많은 공극을 포함하여 열전달이 지연되는 것으로 판단된다. This study is a research about performance of fireproof board using industrial waste such as oyster shell and dry process bottom ash through the heating test and conclusions were obtained as follows. Test samples show back side temperatures as follows : in 300℃, 103.1∼125.1℃, in 600℃, 201.1∼210.1℃, in 900℃, 249.2∼276.9℃. In the test, temperature increases of specimens of fireproof board are kept at certain temperatures hence it could be concluded that the specimens withstand high temperatures. According to the test, it could be concluded that fireproof board made by smaller particles shows better performance up to 600℃ while at higher temperatures, fireproof board made by bigger particles shows better performance. It is estimated that fireproof board made by particles of bigger size has more pore structure and it delays heat conduction.
고분자캐패시터에 대한 충방전 조건에서의 온도에 따른 정전용량감소 특성 연구
정의효(Ui-Hyo Jeong),임홍우(Hong-Woo Lim),형재필(Jae-Phil Hyung),고민지(Min-Ji Ko),정창욱(Chang-Uk Jung),조정하(Jeong-Ha Cho),장중순(Joong-Soon Jang) 한국신뢰성학회 2017 신뢰성응용연구 Vol.17 No.1
Purpose: Polymer capacitors are known to have very high reliability as compared with liquid electrolytic capacitors, but their capacity has been reported to decrease in charge and discharge at low temperature. The purpose of this study to clarify these characteristics. Methods: In order to clarify these characteristics, charging-discharging tests were carried out for 200 hours with three different capacities and at 5 different temperature from 5℃ to 100℃. Results: As a result of the test, it was confirmed that the capacity of the polymer capacitor was decreased with higher capacity and lower temperature. Conclusion: Such a failure phenomenon was caused by the shrinkage and expansion characteristics of the polymer used therein, it is presumed that this failure phenomenon is due to the complex pore structure made by etching.
정의중 ( Jeong Ui Jung ),윤정신 ( Yun Jeong Sin ),김성희 ( Kim Seong Hui ),황진석 ( Hwang Jin Seog ),김선영 ( Kim Seon Yeong ),신상훈 ( Sin Sang Hun ) 대한산부인과학회 2003 Obstetrics & Gynecology Science Vol.46 No.5
Parovarian cysts constitute 10% of adnexal masses. They were found in broad ligament and mostly arise from mesothelium and less commonly from paramesonephric element and rarely from mesonephric element. In most cases parovarian cysts were asymptomatic. So, they were found incidentally at surgery for other conditions. Torsion is infrequent and it is difficult to distinguish it from torsion of other adnexal masses, appendicitis, etc. Recently, we experienced a voluminous parovarian cyst undergoing torsion, 25㎝ in diameter. The case is presented with a review of literature.
유닛 커튼월 프로파일 형상 변화에 따른 구조 성능 검토에 관한 연구
정의인 ( Jung Ui-in ),홍상훈 ( Hong Sang-hun ),김해나 ( Kim Hae-na ),박준서 ( Park Jun-seo ),김봉주 ( Kim Bong-joo ) 한국건축시공학회 2023 한국건축시공학회 학술발표대회 논문집 Vol.23 No.1
The unit curtain wall is an exterior finish currently used on the exterior walls of high-rise buildings. Although the structural impact is not significant due to the non-strength wall, in the case of the unit curtain wall to which the factory manufacturing method is applied, deformation of the profile may occur according to its own weight. Therefore, in this study, stability is evaluated through design standard calculation applied when finishing the outer wall according to the design shape of the unit curtain wall profile.
철강 슬래그를 사용한 도로용 긴급보수 모르타르에 관한 실험적 연구
정의인 ( Jung Ui-in ),김봉주 ( Kim Bong-joo ),김진만 ( Kim Jin-man ),곽은구 ( Kwak Eun-gu ) 한국건축시공학회 2018 한국건축시공학회지 Vol.18 No.5
본 연구는 철 생산 공정 중에 발생되는 철강슬래그를 재활용하는 것으로 매립에 의존하는 철강 슬래그를 건설용 재료로 사용하는 것이다. 철강 슬래그는 물과 반응할 경우 팽창 붕괴되어지는 문제로 인하여 에이징 처리를 실시하고 있다. 이런 문제점을 해결하기 위하여 개발된 SAT 공법은 철강 슬래그의 팽창 붕괴에 대한 안전성을 갖는다. 이에 본 연구에서는 SAT 공법에 의해 제조된 환원슬래그와 전기로 산화슬래그, 실리콘 망간 슬래그를 사용하여 도로용 긴급 보수모르타르에 관한 실험적 연구를 실시하였으며 다음과 같은 결론을 도출하였다. 환원슬래그는 초속경 시멘트에 대해 대체할 경우 속경성을 갖는 것으로 나타났으며, 대체율 15%까지는 동등하게 나타났다. 전기로 산화슬래그는 천연 골재에 대해 100% 대체하여도 동등한 특성을 갖는 것으로 나타났으며, 이런 전기로 산화슬래그에 대해서 실리콘 망간 슬래그를 대체할 경우 15-30%까지 대체가 가능한 것으로 나타났다. 이상의 배합으로 도로용 긴급 보수 모르타르의 배합 설계가 가능하였다. 이런 슬래그를 재활용은 시멘트와 천연 골재의 사용량을 저감시켜 이산화탄소 발생의 감소와 폐기물인 슬래그를 재활용으로 녹색 산업에 이바지가 가능하다. The purpose of this study is to recycle steel slag generated from the iron producing process and to use steel slag as a construction material which is currently landfilled Steel slag is subjected to aging treatment due to the problem of expansion and collapse when it reacts with water. The Slag Atomizing Technology (SAT) method developed to solve these problems of expanding collapse of steel slag. In this study, experimental study on the emergency repair mortar using the reducing slag, electric arc furnace slag and silicon manganese slag manufactured by the SAT method is Reduced slag was shown an accelerated hydration when it was replaced with rapidly-setting cement, and the rate of substitution was equivalent to 15%. It is shown that the electric furnace oxide slag is equivalent to 100% of the natural aggregate, and it can be replaced by 15-30% when the silicon manganic slag is substituted for the electric furnace oxide slag. With the above formulation, it was possible to design the rapidly repair mortar for road use. These recycling slags can contribute on achieving sustainability of construction industry by reducing the use of cement and natural aggregates and by reducing the generation of carbon dioxide and recycling waste slag.
굴 패각의 조립률 및 양생방법에 따른 강도특성에 관한 연구
정의인 ( Jung Ui-in ),홍상훈 ( Hong Sang-hun ),유남규 ( You Nam-gyu ),송승리 ( Song Seung-li ),김봉주 ( Kim Bong-joo ) 한국건축시공학회 2018 한국건축시공학회 학술발표대회 논문집 Vol.18 No.1
Oyster shell is produce by shucking process in oyster farming in southern coast of Korea. In average, about 6.7kg of oyster shell is produced as an industrial waste for 1kg of oyster flesh, and even only in last year, it is estimated that about 150,000 ton of oyster shell is produced. Oyster shell is light weighted and the strength characteristic of it is similar to send. So we produced mortar test piece using grounded oyster shell according to aggregate and reviewed strength characteristic. Therefore, in this study, the strength characteristics of the test specimen are evaluated by artificially altering fineness modulus and curing method by processing oyster shells.