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Microwave로 가열된 침엽수 규격재의 압축률별 강도특성에 관한 기초적 연구
박철우(Park Cheul-Woo),임남기(Lim Nam-Gi) 대한건축학회 2009 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.29 No.1(구조계)
The quality lowering of coniferous tree dimension lumber is due to a high moisture absorption of wood itself that causing shrinking .swelling and defect of joint parts & increase in moisture content accompanying the damage by blight and harmful insects, all of which factors work as the cause for difficulty for hardness & rigidity to be kept certain desirable quality. The purpose of this study is to minimize quality defect and densify through compression of coniferous tree dimension lumber to set it holding stable quality with hardness extended structural coniferous tree dimension lumber for wooden houses and consider its traits to use as a basic data for the proposal of mechanical basis into the wooden materials with high durability and quality, and for the purpose to be achieved, a successive work was conducted like the following. Irradiated structural dimension lumber evenly and rapidly with microwave, compressed the wood with adequacy ratio at the temperature of the cellulose of the wood softened, increased the surface and internal density to keep the dimension lumber's water content evenly and lessened water absorptivity.
박철우 ( Park Cheul-woo ),신상호 ( Sin Sang-ho ),이동건 ( Lee Dong-gun ),조영빈 ( Jo Young-bin ),주희정 ( Ju Hee-jung ),임남기 ( Lim Nam-gi ) 한국건축시공학회 2021 한국건축시공학회 학술발표대회 논문집 Vol.21 No.1
A comparative analysis of wear resistance and shock resistance tests shows that wear resistance is up to 6 times and at least 2 times higher wear resistance than current products, even considering the limited number of turns due to too much rotation. In the case of shock resistance, there was no problem except 7.5T, but this is only a result of KS test method, so it is deemed that additional fall impact tests by various objects in daily life are needed for practical comparison.
박철우 ( Park¸ Cheul-woo ),임남기 ( Lim¸ Nam-gi ),이동건 ( Lee¸ Dong-gun ),조영빈 ( Jo¸ Young-bin ) 한국건축시공학회 2021 한국건축시공학회 학술발표대회 논문집 Vol.21 No.2
Comparing the absorption volume of test pieces immersed over time in room temperature moisture with weight, WF absorbed about 40% more than PLAIN, and PLAIN stopped absorbing after 10 minutes, but WF continued to absorb. It is thought that the woven fabric layer of the core material continued to absorb moisture. In the heat transfer test, the test piece to which only WF was applied had a temperature difference of about 2℃ compared to PLAIN, and when the insulating liquid was sprayed, there was a difference in heat transfer properties of up to 5℃. This is judged to have low heat transfer properties of the basic woven fabric, but the heat insulating liquid also further reduces heat transfer properties.
플로어링보드 바닥 접착제용 에폭시본드의 열전달 향상을 위한 실험적 연구
박철우 ( Park Cheul-woo ),이현수 ( Lee Hyeun-soo ),임남기 ( Lim Nam-gi ) 한국건축시공학회 2022 한국건축시공학회 학술발표대회 논문집 Vol.22 No.1
The higher the addition rate, the less difference in kneading was found., This is because most of the cases are mixed with vinyl gloves by hand when immediately mixed in the field, so there is no problem of mixing dough according to the amount of addition.,The mean increase temperature for 20 minutes was 31.6℃ for Plain, 38.1℃ for Al, 33.7℃ for Cu, and 5~7℃ for Al 20% added sample, 38.1℃ for Al 20% added sample, but 36.6℃ for Al 5% added sample.,This suggests that it is possible to improve its own heat transferability by adding metal powder to epoxy adhesives.
박철우 ( Park Cheul-woo ),임남기 ( Lim Nam-gi ) 한국건축시공학회 2017 한국건축시공학회 학술발표대회 논문집 Vol.17 No.2
There is some recognition that Decoration Wood-based Flooring Board in Korea is a material that inhibits the heat transfer from the substrate to the room. There is a lack of substantial research literature on the surface heat transfer and condition of Decoration Wood-based Flooring Board, which is insufficient to deal with false perceptions. In this study, the purpose of this study is to analyze the surface heat transfer characteristics of Decoration Wood-based Flooring Board and to obtain basic data to cope with recognition.
치장목질마루판용 합판과 경질섬유판의 유지관리를 위한 품질성능 분석
박철우 ( Park Cheul Woo ),임남기 ( Lim Nam Gi ) 한국구조물진단유지관리공학회 2017 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.21 No.2
As a result to check basic physical characteristics of plyood and fabric board, both of them satisfied the criteria of KS F 3126 but hardened fabric board only showed changes in the absorption width expansion rate. This may imply that continuous expansion and swelling can occur if hardened fabric board is exposed to moisture for longtime, and it should be considered when selecting a product and mainteaning it.