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신기돈 ( Shin Ki-don ),고산 ( Gao San ),이건철 ( Lee Gun-cheol ) 한국건축시공학회 2017 한국건축시공학회 학술발표대회 논문집 Vol.17 No.2
Previous studies have confirmed the performance of pH reduction agents using liquid sodium phosphate based ammonium chloride as a pH reduction agent. In this study, the pH reduction performance considering economical and applicability as a practical stage and the property change analysis for the identification of the reaction mechanism of the pH reduction agent were carried out. As a result, the pH reduction performance at a low rate of the pH reducing agent was confirmed. The specific gravity of CaO decreased significantly after XRF analysis. It is also believed that this reduces the amount of Ca(OH)<sub>2</sub> produced and contributes to pH reduction.
신기돈 ( Shin Ki Don ),지우람 ( Ji Woo Ram ),이건철 ( Lee Gun Cheol ),조도영 ( Heo Young Sun ) 한국구조물진단유지관리공학회 2018 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.22 No.2
In this study, CGS is a concrete admixture material that has been investigated as a way to promoto recycling of CSG. As results, Show that the early strength is low and the activity index is according to the degree of fineness is insignificant
신기돈 ( Shin Ki Don ),지우람 ( Ji Woo Ram ),이건철 ( Lee Gun Cheol ),허영선 ( Heo Young Sun ) 한국구조물진단유지관리공학회 2017 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.21 No.1
In this study, In this study, Simulation using COMSOL Multiphysics thermal flow program of A company was carried out for thermal diffusion analysis according to depth of concrete exposed to high temperature. As a result of the analysis, it was found that the thermal diffusivity decreased with the depth and the temperature difference decreased with the heating time.
고온에 노출된 콘크리트의 깊이에 따른 열확산 시뮬레이션 해석
신기돈 ( Shin Ki Don ),지우람 ( Ji Woo Ram ),이건철 ( Lee Gun Cheol ),허영선 ( Heo Young Sun ) 한국구조물진단유지관리공학회 2017 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.21 No.1
In this study, In this study, Simulation using COMSOL Multiphysics thermal flow program of A company was carried out for thermal diffusion analysis according to depth of concrete exposed to high temperature. As a result of the analysis, it was found that the thermal diffusivity decreased with the depth and the temperature difference decreased with the heating time.