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혼합 섬유를 사용한 HPFRCC의 펌프압송 전·후의 강도특성 분석
이종태 ( Jong Tea Lee ),박용준 ( Yong Jun Park ),최상환 ( Sang Hwan Choi ),문경식 ( Gyeong Sik Mun ),한민철 ( Min Cheol Han ),한천구 ( Cheon Goo Han ) 한국건축시공학회 2015 한국건축시공학회 학술발표대회 논문집 Vol.15 No.2
For the facility using explosive gas, it is very important to use anti-explosive structure. Therefore, using FRC of high stiffness should be used, but the research on actual application under the construction conditions is not sufficient. Hence, in this research, based on the case study on application of FRC for anti-explosive structure, the strength characteristics of FRC with combined fibers were evaluated comparing between before and after the pumping.
ERCO 혼입율과 섬유혼입비 변화에 따른 HPFRCC의 자기수축저감
이제현 ( Jea Hyeon Lee ),백철 ( Cheol Baek ),조만기 ( Man Ki Jo ),조성준 ( Sung Jun Jo ),이종태 ( Jong Tea Lee ),한천구 ( Cheon Goo Han ) 한국건축시공학회 2016 한국건축시공학회 학술발표대회 논문집 Vol.16 No.1
As the treatments of many kinds of explosive objects increase recently, it is in the trend that explosion accidents increase. Thus, many studies on HPFRCC (High-performance Fiber-reinforced Cement Composites) whose ductility is enhanced are being conducted actively in order to minimize the damages from explosion accidents. However, HPFRCC, the self-shrinkage of HPFRCC is on the rise as a problem since it becomes ultra-high strengthened by using low W/B. Thus, in this study, it is intended to evaluate the capacity for reducing the self-shrinkage of HPFRCC depending on some changes of ERCO(Emulsified Refined Cooking Oil) replacement ratio and the fiber replacement ratio between some short steel fibers (SS) and some long organic fibers (OL). As a result, it was found that some excellent effects are exerted since the self-shrinkage was reduced a lot as the ERCO replacement ratio increases and the fiber replacement ratio of SS rather than OL increases.
버스엔진에서 디젤연료사용에 따른 디젤 배기 미립자 물질의 특성
오승민(Seung -Min Oh),박선종(Sun 一Jong Park),이종태(jong -Tea Lee,이장훈(Jang -Hoon Lee) 호서대학교 공업기술연구소 2012 공업기술연구 논문집 Vol.31 No.1
스엔진에서 디젤연료사용에 따른 운전모드 ETC모드와 ESC모드로 각각 모아진 디젤배기미립자물질의 배출 특성을 알아보았다. PM포집량의 농도는 ETC모드 및 ESC모드 각각 4.62와 3.44mg/trf였다. 자동차 배기가스 대표적 규제기준 항목인 C 0 2, THC, CO 값이 ETC모드에서 ESC모드 보다 증가 하였다. 그러나 N 0 X의 경우 ESC모드에서 ETC모드 보다 증가되는 것으로 나타났다. 디젤분진에 흡착되어있는 금속류를 측정한 결과 A1. Cd, Cr, Cu, Fe, M n, N i, Zn 등이 검출 되었으며, Cd의 경우에는 ETC모드에서만 검출되었고, Cr은 ETC 모드 보다 E SC 모드에서 유의적으로 높게 관찰되었다. 본 연구에서는 DPF 장착 없이 평가한 결과이기 때문에 DPF 장착 후 디젤버스엔진의 배출특성에 대한 연구를 추가연구가 필요하다고 판단된다. We studied characteristics of the diesel particulate matter (DPM) collected following the European Transient Cvcle (ETC) mode and European Stationary Cycle (ESQ in a diesel bus engine fueled with base-diesel (BD) oil. PM mass concentration of ETC mode and ESC mode was mode 4.62 and 3.44 m^m1, respectively. Emission of CO2, The concentration of total hydrocarbon (THC) and carbon monoxide (CO) in ETC mode was higher than those in ESC mode, while nitrogen oxide (NO) in ETC mode was lower than that in ESC mode. In addition, DPM extract were enriched in Al, Cd, Cr, Cu, Fe, Mn, Ni, and Zn. In this study, because we studied on characteristics of DPM in bus engine without Diesel Particulate Filter trap (DPF), further studies was needed to study on characteristic of DPM in diesel bus engine with DPF.
박용준,이종태,한천구 청주대학교 산업과학연구소 2016 産業科學硏究 Vol.33 No.2
Recently, we tend to have been rapidly increasing damage caused by globally explosion. In particular, November 23, 2010, there is a large damage to human life and buildings by the Yeonpyeong Island shelling by North Korea troops. As scheme for solving this, there is in progress actively any HPFRCC studies of various methods are uneconomical property, construction performance somewhat inadequate circumstances to apply to the actual building. Therefore, in this study, an attempt is made to derive the mortar compounding ratio as one of the research in order to derive the optimum blend of HPFRCC. In the case of experimental research results W/B 25% front and at a later date, C:S = 1:0.6 before post-was found to be optimal.