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MWCNT-TiO<sub>2</sub>를 활용한 ECC의 역학적 특성
장영일 ( Jang Young-il ),이종원 ( Lee Jong-won ),배준영 ( Bae Jun-young ),김선우 ( Kim Sun-woo ),박완신 ( Park Wan-shin ) 한국구조물진단유지관리공학회 2020 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.24 No.1
본 연구에서는 MWCNT와 광촉매인 TiO<sub>2</sub>의 환경정화 성능을 접목하여 복합 신소재인 MWNT-TiO<sub>2</sub> 제작하였다. MWCNT-TiO<sub>2</sub>를 혼입하여 제작된 ECC의 역학적 특성을 분석하여, 향후 토목재료용 고기능성 복합 소재 개발에 기초 연구로 활용하고자 한다. 실험결과, PVA섬유와 MWCNT-TiO<sub>2</sub>를 동시에 혼입할 경우 기존의 PVA만 혼입한 ECC에 비하여 성능이 향상되는 것으로 나타났다.
나노 TiO2 담체를 혼입한 콘크리트의 염소이온 침투 저항 성능에 관한 연구
장영일 ( Jang Young Il ),이종원 ( Lee Jong Won ),배준영 ( Bae Jun Young ),박완신 ( Park Wan-shin ),김선우 ( Kim Sun Woo ) 한국구조물진단유지관리공학회 2019 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.23 No.2
The purpose of this experimental study is to chloride ion penetration resistance performance of concrete using Nano-TiO<sub>2</sub> Carrier. As a result, concrete using Nano-TiO<sub>2</sub> Carrier was confirmed to be superior than ordinary concrete and commercial TiO<sub>2</sub> concrete chloride ion penetration resistance performance.
장영일(Young Il Jang),이상준(Sang Joon Lee) 한국가시화정보학회 2008 한국가시화정보학회 학술발표대회 논문집 Vol.- No.2
The POD modal characteristics of the turbulent wake in the cross-sectional planes behind a sphere at Re=11,000 were analyzed with the POD eigenvalues and modal velocity vector fields. The relative contribution of the POD mode 1, 2 and 3 in eigenvalues was 26, 11, and 8 %, respectively. Velocity vector fields of the POD mode 1 at x/d=0.7~1.4 showed similar pattern with those of time-averaged velocity fields. On the other hand, the sphere wake in the region from x/d=1.5 to x/d=2.0 showed the directional variation of flow pattern at sequential x/d locations. This implies that the wavy pattern was the dominant coherent structure of the sphere wake. From the POD mode 2, the conspicuous foci, saddle and node points appeared irregularly at each downstream locations. The unique distribution patterns including the large-scale circulatory vortex in the POD modes were not observed in instantaneous or time-averaged mean velocity fields. The POD decomposition was useful in identifying obscured coherent structures.
나노 TiO₂담체를 혼입한 상온 재생아스팔트의 역학적 특성에 관한 연구
장영일 ( Jang Young Il ),이종원 ( Lee Jong Won ),배준영 ( Bae Jun Young ),박완신 ( Park Wan-shin ),김선우 ( Kim Sun Woo ) 한국구조물진단유지관리공학회 2019 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.23 No.1
The purpose of this study is to investigate the mechanical properties of cold-mixed recycled asphalt (CMRA) using Nano-TiO<sub>2</sub> carrier. As a result, mechanical properties of CMRA using Nano-TiO<sub>2</sub> carrier was confirmed to be superior than CMRA using commercial TiO<sub>2</sub>. Also, it was confirmed to be performance of equal or higher than of existing technology.