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굴 패각의 잔골재 입도분포 변화에 따른 모르타르의 내화성 검토
최인권 ( Choi In-kwon ),정의인 ( Jung Ui-in ),김봉주 ( Kim Bong-joo ) 한국건축시공학회 2017 한국건축시공학회 학술발표대회 논문집 Vol.17 No.1
The oyster shell is lightweight and exhibits strength characteristics similar to sand. In this study, mortar specimens were fabricated by crushing them and processed to 5mm or less of the fine aggregate standard, and examined the fire resistance of the mortar according to changes in particle size distribution. In this experiment, seven particle size distribution conditions were tested. In addition, the mixing ratio was fixed at 1: 3, and the experiment was conducted in terms of the volume ratio because the densities of sand and oyster shells were different.
굴 패각의 잔골재 입도분포 변화에 따른 모르타르의 강도특성
최인권 ( Choi In-kwon ),홍상훈 ( Hong Sang-hun ),정의인 ( Jung Ui-in ),김봉주 ( Kim Bong-joo ) 한국건축시공학회 2017 한국건축시공학회 학술발표대회 논문집 Vol.17 No.2
In this study, mortar strength was measured by grinding oyster shell and changing the particle size distribution. For the experiment, the oyster shells were processed to a fine aggregate size of 10㎜ or less. In this experiment, seven particle size distribution conditions were selected and tested. Because oyster shells are different in density from sand, their volume ratios were calculated and converted to mass ratios of 1: 3. The strength test was carried out one day after the steam curing.
분급된 굴 패각을 잔골재로 사용한 모르타르의 강도특성에 관한 연구
정의인 ( Jung Ui-in ),홍상훈 ( Hong Sang-hun ),최인권 ( Choi In-kwon ),김봉주 ( Kim Bong-joo ),원철희 ( Won Chul-hee ),박정훈 ( Park Jung-hun ) 한국건축시공학회 2016 한국건축시공학회 학술발표대회 논문집 Vol.16 No.2
Oyster shell is produced 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 its strength characteristic is similar to sand. So we produced mortar test piece using grounded oyster shell powder under 0.6mm, 0.6~1.2mm, 1.2~2.5mm, 2.5~5.0mm of its particle size according to fine aggregate standard and reviewed strength Properties.
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.
김한성,이해욱,최인권 大韓成形外科學會 1996 Archives of Plastic Surgery Vol.23 No.5
From March 1992 to September 1995, we had treated thirty patients with high-tension electrical burns in lower extremities. High-tension electrical injury in extremity had difficult problems on wound management, and it may resulted in destruction of the underlying deep structures. Because lower extremity which is responsible for weight bearing plays an important part of the body, the wound management and reconstruction should be carefully considered in many ways. After clinically analysis of the patients and the reconstructive methods, following results are obtained. 1. The defects on output site are usually located at weight bearing or contact areas around feet and knees. 2. About half of lesions in feet or knees finally result in osteomyelitis. 3. The wounds progress to around area and local flaps are frequently not available. Adequate free flap transfer provides most reliable method for the management of the difficult wound. 4. At the time of free flap reconstruction, thorough inspection and sufficient dissection should be applied, because the recipient vessels and connective tissues borded on the wounds had wide spreaded fibrosis.
미세모발이식법을 이용한 남성형 탈모증의 치료 : 64례의 경험
이우용,김한성,최인권 大韓成形外科學會 1996 Archives of Plastic Surgery Vol.23 No.6
Male pattern baldness is the most common form of the hair loss in both sexes. Various methods have been applied for treatment of male pattern baldness such as scalp reduction, scalp flaps and composite hair trans plantation, etc. Generally, the most important and difficult point of hair reconstruction would be the achievement of natural frontal hair lines. In order to solve the problems of unnatural frontal hair line that cannot fulfill aesthetic desires of patients, we have treated 64 cases of male pattern baldness with using hair transplantation techniques of minigraft an micrograft. In all cases the patients were treated by mixed method of minigraft and micrograft. The graft was done with 2 or 3 sessions and the each sessions had 6 month interval. With these micrograft and minigraft techniques, it was possible to produce a natural-looking, soft frontal hair line, hiding an unnatural-looking, dense hair line that starts abruptly with coarse hairs. It was also possible to hide disturbing visible scarring or cobble stoning of the foremost punch grafts. We treated 64 cases of male pattern baldness by using hair transplantation technique and we had excellent result for the treatment of male pattern baldness by using the minigrafting and micrografting techniques.