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超遲延劑의 凝結時間差에 의해 區分打設된 매스 콘크리트의 水和熱 低減 效果에 관한 硏究
한천구(Han Cheon-Goo),오선교(Oh Seon-Kyo),윤치환(Yoon Chi-Han),황인성(Hwang Yin-Seong) 대한건축학회 2003 大韓建築學會論文集 : 構造系 Vol.19 No.7
This study is dealt with reduction of hydration heat of 4 layer division-placed mass concrete by the difference of setting time of super retarding agent. According to the results, peak temperature of plain concrete, which does not mix super retarding agent, show 63℃ in the middle of 3rd layer. In the division-placed mock up structure which is controled so that the difference of setting time is 0.5, 1.0, 1.5, 2.0day same interval and 1.5 day same interval with change of thickness, setting time is retarded a bit in order of 4 layer to 1 layer, but peak temperature shows 70℃ that is higher than plain concrete. But in mock up structure which is division-placed at the varied interval, peak temperature by hydration heat shows 50℃ that it is reduced by about 13℃, compared with plain concrete because after first peak hydration heat of 4th layer (plain concrete), hydration reaction progresses after the drop of hydration heat in order of 3rd, 2nd and 1st layer. Thus, it is effective for reduction of hydration heat that concrete is division-placed at the varied interval of setting time.
다발성 골전이를 동반한 진행된 원발성 반지세포 폐암종(Primary Signet Ring Cell Carcinoma of Lung) 1예
신도현 ( Do Hyun Shin ),김형일 ( Hyoung Il Kim ),임선교 ( Seon Kyo Lim ),이승원 ( Seung Won Lee ),정연무 ( Youn Mu Jung ),최영인 ( Young In Choi ),신승수 ( Seung Soo Sheen ),박주헌 ( Joo Hun Park ),오윤정 ( Yoon Jung Oh ),박광주 ( 대한결핵 및 호흡기학회 2004 Tuberculosis and Respiratory Diseases Vol.57 No.6