• Explosives and Blasting
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• v.18 no.3
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• pp.89-97
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• 2000

최근 노후화 된 콘크리트 및 털 구조물에 대하여 환경 공해가 발생하지 않는 해체 기술의 필요성이 급증하고 있어서 이에 대한 연구가 활발히 이루어지고 있다. 그 결과 콘크리트 구조물을 일시에 해체하기 위하여 사용되고 있던 화약을 이용한 발파해체공법 및 군용 폭파 공법 등으로부터 응용되어 특수한 형태의 크기로 제작된 성형폭약을 철골구조물에 부착시킨 후 이를 폭발 시켜서 순간적으로 철골구조물의 철판(또는 빔이나 기타 부자재)을 절단 해체할 수 있게 되었다. 그 동안은 성형폭약의 폭발절단 효과에 영향을 주는 요소들인 대상 구조물의 재질 및 형상, 두께와 강도 특성, 성형폭약의 형상, 폭약의 종류, 장약량, Liner의 종류, Stand-off Distance, 성형폭약의 폭 및 너비, 기폭방법에 따른 영향과 폭발 절단시 발생되는 폭풍압에 의한 진동 및 소음의 영향 등에 대한 연구가 대부분이었다. 따라서 본 연구에서는 성형폭약의 주 구성요소인 화약과 금속성 Liner를 유연성이 탁월하고 조성 성분들의 혼합성과 성형성이 우수한 가소화제를 사용하여 제작된 성형폭약의 가소화 정도가 폭발절단력에 미치는 영향을 검토하였다. 이를 위하여 본 연구는 PETN 과 RDX 화약이 각각 25wt% 및 75wt%로 흔합된 화약원료를 85wt%로 하고 폴리이소부틸렌(P.I.B) 성분이 80 wt% 이상인 폴리부텐(P.B) 7wt% 와 부틸고무 4wt% 그리고 디에칠헥실세바케이트 4wt%로 구성된 가소화제를 사용하여 실험하였다.

• Journal of the Korean Society of Costume
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• v.51 no.8
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• pp.123-139
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• 2001

본고는 공간, 시간, 계급, 종교 등 하위문화 텍스트의 병행인용 즉 상호텍스트성(intertextuality)을 통해, 20세기 대중 문화의 상징 마돈나 뮤직 비디오와 공연 등의 인체, 의상, 이미지 등에 나타난 포스트모던 정체성을 연구함으로써, 현대 미디어 문화를 관통하는 주체적 여성 정체성과 미적 주관성을 이해하고자한다. 첫째, 상호공간텍스트성 복식은 스패니쉬룩. 태국룩. 게이샤룩, 테크노펑크룩, 테크노 카우걸룩 등의 동서양의 지리적 소외감을 통해 비권위적 다양한 시선을 제시함으로써, 다국적 자본주의와 함께 확장된 미적 체험을 하게 한다.; 둘째, 상호시간텍스트성 복식은 중세 엠파이어 드레스, 18세기 로코코시대의 robe'a la francaise, 미래적 제 3의 종 룩 등 동시적 몽환적 이미지를 통해 유희적 유토피아를 지향하였다.; 셋째, 상호계급텍스트성 복식은 그라피티룩, 펑크룩, 키치룩, 먼로 룩, 보깅(voguing), 에비타 룩 등 상하류층, 하위문화, 빈부, 권력의 유무를 병행인용하여, 좋은/나쁜 취향, 창녀/성녀 이분법을 해체하고 반부르조아적 저항과 물질주의를 찬양하는 탈계급적, 양면적 정체성을 구축하였다. ; 넷째, 상호종교텍스트성 복식은 상징적 가부장인 카톨릭교 텍스트를 인용하여 펑키크리스찬 룩, 에로틱 크리스찬 룩 등의 선/악, 신성성/관능성, 미추, 정숙성/비정숙성의 이분법, 비장미를 해체함으로써 예술의 자율성, 무의식이 강조된 쾌락주의적, 반권위주의적 정체성을 주장한다. 섹슈얼리티에 있어, 시선, 권력, 쾌락의 주체가 됨으로써, 미적 범주에 있어 선악, 미추, 정숙성과 비정숙성의 이분법을 해체함으로써, 유동적 자아를 구성한 마돈나 의상의 포스트모던 정체성은 여성에게 확대된 가능성을 제공하며 내부로부터 해체된 열린 복식을 지향한다.

• Journal of the Korea institute for structural maintenance and inspection
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• v.8 no.4
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• pp.97-105
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• 2004

As modern society has been progressed, the demolition method of concrete structure that satisfy the condition of safety, economic efficiency, and environment-friendliness is required. This study investigated problems of existing demolition methods and developed modified method minimizing cooling water and sludge for demolition job. It was also verified the validity of this method based on the finite element methods. A analysis parameters as a number, depth and size of boring, and self weight were introduced for this study, and gave optimal condition for the demolition job and analysis.

• Explosives and Blasting
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• v.22 no.3
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• pp.43-55
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• 2004

Use term of tower style construction exceeds recently. Accordingly, according to construction safety diagnosis result, achieve removal or Improvement construction. But when work removal, must shorten shut down time. Therefore, removal method of construction to use blasting demolition of construction is very profitable. Influence construction and equipment by blasting vibration and occurrence vibration caused by felling impact. Is using disadvantageous machine removal method of construction by and economic performance by effect of such vibartion. Therefore, this research studied techniques to forecast vibartion level happened at blasting demolition and vibration reduction techniques by use a scaled model test.

• Proceedings of the Korean Radioactive Waste Society Conference
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• 2003.11a
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• pp.645-649
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• 2003

The variety conditions and working situations during decontamination and decommissioning practice may cause the production of metallic wastes, which can differ in character or in quantity from the waste anticipated during D&D planning. The management of such kind of wastes involves the need to evaluate existing waste management system in order to determine how metallic wastes should be well handled and treated. In this study, the investigation of existing management practices which can be also applied to the metallic waste management, was carried. Simultaneously, assistance in selection of appropriate technologies and processes is investigated which can be used when anticipated situations occur during decontamination and decommissioning practice.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2007.04a
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• pp.113-118
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• 2007

Now a performance process of Demolition works is 'Before-Removal & After-Classification' method in Korea. This method is short of demolition time, but construction wastes contained substances lower recycling rate of construction, raise expenses of reclamation & treatment. Then the government has decided upon a positive 'Before-Classification & After-Removal' method, and substantially raise a recycling rate of construction wastes. Therefore, this study makes an investigation into state of internal and external demolition field through evaluating technological level, we make a proposal of dismantling method from there. Also, we put dismantling to the test in an apartment by proposed work process. As the result, it made a term of works increased for removing interior material. To solve this problem, we need to develop tools and methods of construction that can remove efficiently. From now on, we continuously need to study a breakdown system of dismantling, analysis of dismantling process and general system by inspecting entire demolition process. And we have to study details for making a specific thesis of method of removing interior material which was based on developing a suitable partial demolition machine and dismantling works.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2008.11a
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• pp.536-539
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• 2008

Construction waste is given a great deal of weight on the total waste. Because of many reconstructions, urban redevelopment projects and dismantlement of dilapidated building, construction waste that generated by dismantlement is having a great effect on total construction waste. Problems about waste treatment are increasing along with an amount of construction waste. Therefore, environmental problems that related to waste treatment become a social issue recently and problems about waste treatment are confronted with a major subject. A study focuses on giving solutions to treat construction waste through quantitative analysis of the problems about waste treatment.

• Journal of Radiation Industry
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• v.17 no.1
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• pp.69-73
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• 2023

Commercially used organic scintillation materials (1,4 di[2-(5phenyloxazolyl)] benzene) have low solubility in solvents and a wide emission energy range, which causes a decrease in detection efficiency. In this study, an organic liquid scintillator with improved detection efficiency was developed using 7-Diethylamino-4-methylcoumarin material to compensate for the disadvantages of existing organic scintillation detectors. And to evaluate the applicability of radiation measurement, the performance of a commercial plastic detector was compared. As a result of analyzing the ⁶⁰Co detection characteristics by applying 7-Diethylamino-4-methylcoumarin as an alternative to 1,4 di[2-(5phenyloxazolyl)] benzene, the detection efficiency was improved around 2% compared with commercial scintillator when the 7-Diethylamino-4-methylcoumarin content was 0.04 wt%. Based on the results of this study, the possibility of improving detection efficiency through scintillator material modification was confirmed. In addition, since it is possible to discriminate nuclide through the spectrum correction algorithm, it will be possible to inspect and classify various decommissioning wastes generated during the decommissioning process.

• Tunnel and Underground Space
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• v.13 no.3
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• pp.225-234
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• 2003

The structures to be demolished have become diverse in types from reinforced concrete to steel. The demand for demolition of steel structures is recently increasing in Korea. Most of flexible linear-shaped charges for steel demolition are now imported from foreign countries. To determine the optimum parameters of design far domestic development of flexible linear-shaped charges, some basic experiments have been carried out and their results are summarized as follows; Copper is shown to be superior to aluminium and lead as a liner material. It is also proved that the optimum apex angle of liner is 90$^{\circ}$ in comparision with 45$^{\circ}$, 60$^{\circ}$ and 120$^{\circ}$ Adequate thickness of liners, standoff distance in terms of quantity of explosives are also examined. Explosives and liners are required to be plasticized in order to improve the bond between explosives and various shapes of steel structures.

• Explosives and Blasting
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• v.28 no.2
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• pp.108-118
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• 2010

Soongeui complex stadium is a reinforced concrete frame structure composed of columns, slabs and beams. The stadium, however, is also a special structure because it has a tall tower of electronic display board and slabs inside its own structure which is different from the structures that had been demolished using blasting by then. Explosive demolition for the stadium was carried out from the left-hand side of the outfield stand to the right considering 2 rows of columns supporting the stand as a blasting unit. An overturning demolition method was applied to the tower of electronic display board. Water bags that played the role of multipurpose protection were applied to control the dust. As a result, the demolition project of the special structure of Soongeui complex stadium was judged to be a great success.