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벽식구조 노출철근의 버블시트 양생에 따른 실험실 조건과 외기온 조건의 상호비교
김태우 ( Kim Tae-woo ),이제현 ( Lee Jea-hyeon ),이상운 ( Lee Sang-un ),박구병 ( Pack Koo-byung ),한민철 ( Han Min-cheol ),한천구 ( Han Cheon-goo ) 한국구조물진단유지관리공학회 2017 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.21 No.1
In this research, the investigation of the temperature condition of reinforcing bars under laboratory temperature and outside temperature conditions in the insulation curing method of Korean-Chinese concrete bubble sheet to examine the suitability of the bubble sheet curing method. As a result, the heat of hydration of the concrete on the wall part affects the exposed reinforcing bars to delay the temperature drop at the part where the bubble sheet is not laid.
ERCO에 AE제 사전혼입량 변화에 따른 혼화재 치환 콘크리트의 특성 변화 분석
김태우 ( Kim Tae Woo ),김종 ( Kim Jong ),전충근 ( Jeon Chung Keun ),박구병 ( Pack Koo Byung ),한민철 ( Han Min Cheol ),한천구 ( Han Cheon Goo ) 한국구조물진단유지관리공학회 2018 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.22 No.1
In this study, a series of studies is intended to elicit the improvement of the quality of Admixture Substitute Concrete using oil refined for petrochemical work (ERCO). In other words, ERCO is used to analyze the basic properties of Admixture Substitute Concrete by pre-adding the AE liquid solution on its products. As an experimental variable, the method of adding ERCO was added after mixing it with concrete. In addition, the mixing ratio was planned to be 2 levels of 0, 0.5 %, and the total volume of the AEs injection quantity is 5 % that combines 0, 1, 2, and 3 % of the mixed ERCO mass of concrete. As a result, as the pre-injection of AE was increased, the characteristics of the concrete showed that the slump, and air contents were not improved, and the pre-adopting effects of AE agent were also significantly increased in the concrete.
단열ㆍ비단열거푸집을 설치한 슬래브 콘크리트에서 등가재령 방법의 무선센서 네트워크를 활용한 강도 모니터링
이영준 ( Lee Young Jun ),한준희 ( Han Jun Hui ),이재진 ( Lee Jae Jim ),박구병 ( Pack Koo Byung ),한민철 ( Han Min Cheol ),한천구 ( Han Cheon Goo ) 한국구조물진단유지관리공학회 2018 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.22 No.1
In this study, concrete slab with insulation and non-insulated formwork was used to monitor and control its strength using a wireless sensor network with equivalent age method. As a result, the temperature and compressive strength of the structures were monitored without any problems, which revealed a good management tool.
겨울철 외기온조건에서 3성분계 콘크리트의 부재 두께 변화에 따른 초기동해 깊이진단
김태우 ( Kim Tae Woo ),이재진 ( Lee Jae Jin ),김동규 ( Kim Dong Gyu ),박구병 ( Pack Koo Byung ),한민철 ( Han Min Cheol ),한천구 ( Han Cheon Goo ) 한국구조물진단유지관리공학회 2018 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.22 No.1
In this study, the purpose of the study is to determine the depth of damage caused by early frost damage in concrete slab structures under the conditions of external temperature during winter. In other words, we intend to analyze the depth variation of the early frost damage as the thickness of the concrete slab member changes under the condition of the 3-component binder frequently used in practice. As a result, the thinner the component, the significantly reduced the overall temperature of the concrete. In addition, the thinner the component thickness, the higher the delay in increasing the brightness of the core collected from the concrete member, and the greater the effect on the depth of the early frost damage was on the thinner the component thickness.