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점착유연형 고무 아스팔트계 누수보수용 주입형 실링재의 내화학 시험방법 개선 연구
박완구 ( Park Wan-goo ),김동범 ( Kim Dong-bum ),박진상 ( Park Jin-sang ),김선도 ( Kim Sun-do ),김병일 ( Kim Byoung-il ),오상근 ( Oh Sang-keun ) 한국건축시공학회 2017 한국건축시공학회 학술발표대회 논문집 Vol.17 No.1
In this stduy, we will references to provide reasonable basis for the test environments applicable to the chemical resistance test covered by KS F 4935『Injection-type Sealing Materials for Water Leakage Crack of Adhesive and Flexible Rubber Asphalt』, analyze the problems with the current test methods in consideration of the features of materials. As a result, we assured more objective data in improved chemical resistance test methods.
폴리올 농도를 변화시킨 계면활성제 혼합물의 유변학적 거동
조완구(Wan Goo Cho),김기선(Gee Sun Kim) 한국유화학회 2008 한국응용과학기술학회지 Vol.26 No.4
We have investigated the effects of polyols and NaCl on the rheological behaviours of surfactant mixtures. Sodium lauryl ether sulfate (SLES), cocamidopropyl betaine (CAPB), disodium cocoamphodiacetate (DSCA), cocamide DEA (CDEA) and lauroyl/myristoyl DEA (LMDE) were used as surfactants. The polyols added into the surfactant mixture were 1,3-butylene glycol, propylene glycol, glycerin, sorbitol, dipropylene glycol, PEG 1500 and PEG 400. The addition of amphoteric surfactant to SLES aqueous solution lead to increase the height of foam and the viscosity of the system. The addition of nonionic surfactant, LMDE or CDEA to the SLES aqueous solution increased the viscosity and the effect of LMDE was better than that of CDEA. The effect of adding polyols and NaCl into the surfactant mixture aqueous solution lead to increase or decrease the viscosity of the systems depending on the concentration of NaCl and the kinds of polyols. These results can be explained through the salting in or salting out of surfactant of the systems.
에어분사구 설치에 따른 폴리우레아 도막 방수·방식재의 비산 발생 저감에 관한 연구
김선도 ( Kim Sun-do ),박완구 ( Park Wan-goo ),박진상 ( Park Jin-sang ),조일규 ( Cho Il-kyu ),김병일 ( Kim Byoung-il ),오상근 ( Oh Sang-keun ) 한국건축시공학회 2017 한국건축시공학회 학술발표대회 논문집 Vol.17 No.1
This nozzle has an air flow generation mechanism in the air groove of the attachment cell part located at the end of the injection nozzle. Since the air grooves also function as an air curtain, the airborne particles generated when the waterproof material is sprayed is effectively blocked. In the past, spraying of the waterproof material through the high pressure was possible, but this technology allows stable injection due to the static agitation method, and various problems caused by particle generation has been (damages to neighboring areas, economic loss, etc.) minimized.
건설방수산업분야에서의 유효자원 재활용 및 응용 기술 현황
박진상(Park, Jin-Sang),김선도(Kim, Sun-Do),박완구(Park, Wan-Goo),김동범(Kim, Dong-Bum),이종용(Lee, Jong-Yong),오상근(Oh, Sang-Keun) 한국건설순환자원학회 2016 한국건설순환자원학회 논문집 Vol.4 No.1
본 연구는 건설방수분야의 유효자원 재활용 현황에 대하여 시장 특성 상 정확한 파악이 어려운 점을 고려하여 이에 대한 대안으로 관련 제도 및 인증을 중심으로 조사하여 분석하는 방식으로 연구를 진행하였다. 조사 대상은 건설방수분야에서 획득 가능한 유효자원 재활용 관련 인증으로 선정하였으며, 환경표지, 녹색기술, 신기술을 중심으로 현황을 파악하고 분석하였다. 현황 파악 및 분석 결과, 환경표지의 경우 총 38개 제품이 유효자원 재활용을 사유로 인증을 획득하였으며, 녹색인증은 총 10개, 신기술의 경우, 8개 기술이 유효자원 재활용을 응용한 기술로 확인되었다. 재활용된 자원은 대부분 합성고분자계(EVA, PVC 등), 폐타이어 분말, 폐고무 등이 주를 이루고 있음에 따라 건설방수분야에서의 유효자원 재활용은 전반적으로 소재의 다양성에 있어 제한적인 것으로 확인되었다. This paper intends to analyze the roles of regulations and certifications within the construction market that affect the effective recycling and application methods of construction waterproofing industries. Certifications, eco-labels, green certification patents, and new excellent technologies obtained in construction waterproofing industries are studied. In accordance to the study results, it was determined that, a total of 38 items obtained eco-labels with effective recycling as the theme, 10 items with green certifications, and 8 items with New Excellent Technologies. Regarding the types of effective recycled resources, most of them were concerned with composite-polymer(EVA, PVC, etc.) materials, waste tire powder, waste rubber, etc., which indicated that there is a clear limitation in the variety of the materials that are eligible for effective recycling in the construction waterproofing industries.
탄성체를 이용한 궤간가변 대차용 윤축시스템의 접촉력 해석
이영주(Lee Young-Joo),배대성(Bae Dae-Sung),김완구(Kim Wan-Goo),장승호(Jang Seung-Ho),한준석(Han Jun-Suk) 한국철도학회 2005 한국철도학회 학술발표대회논문집 Vol.- No.-
Research interest on flexible body dynamics, has been increased recently. The major application areas are the auto-mobile, train, and heavy machinery. This paper attempted the dynamic analysis for the variable-gauge wheelset with a flexible body, to better understand the dynamic characteristics of the variable-gauge wheelset. In order to achieve this goal, a 3D-Virtual Mock-up model was built. The tendency of the stress and deformation for the flexible lever was investigated through component mode synthesis, contact mechanics and flexible body dynamics. This study is a pioneering work for the development of Korean type variable-gauge wheelset.