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해수에 노출된 칼슘 알루미나계 그라우트의 기계적 특성 모니터링
손다솜 ( Son Dasom ),박지윤 ( Jiyoon Park ),이종구 ( Chongku Yi ) 한국건축시공학회 2023 한국건축시공학회 학술발표대회 논문집 Vol.23 No.2
Considering the actual marine environment construction, this paper monitors the mechanical properties (Flexural, Compressive strength) by exposing alumina cement to seawater. As a result of the experiment, it was confirmed that the strength decreases by about -25% when curing in seawater, but the target strength of the product is met, so it is believed that exposure to the actual marine environment will not be significantly affected.
HPMC가 다공극 지오폴리머 복합체 시편 위치별 공극 분포에 미치는 영향
손다솜(Son, Dasom),이종구(Yi, Chongku) 한국콘크리트학회 2021 한국콘크리트학회 학술대회 논문집 Vol.33 No.2
본 연구는 지오폴리머 복합체 내 Foaming agent로 인해 생성된 공극의 크기 및 분포 정량화 연구를 수행하기 위한 기초 연구이다. 시편은 증점제의 한 종류인 HPMC를 혼입한 후 TOP-MIDDLE-BOTTOM 구간으로 분류한 후 알고리즘을 이용한 2D Image analysis를 통해 공극량 및 공극 분포를 분석하였다. 실험결과, HPMC를 혼입할수록 시편 위치 별 공극 거동은 비교적 균일하게 나타난 것으로 확인하였다. This study is a fundamental study to conduct a study on quantifying the size and distribution of pores generated by the foaming agent in the geopolymer complex. The specimen was classified into the TOP-MIDDLE-BOTTOM section after incorporating HPMC, a thickener, and analyzed the void volume and void distribution through 2D Image analysis using an algorithm. As a result of the experiment, it was confirmed that the more HPMC was mixed, the more consistent the void behavior for each specimen position was.
손다솜(Dasom Son),정승호(Seungho Jung) 한국위험물학회 2018 한국위험물학회지 Vol.5 No.2
Natech (Natural disaster triggered technological disaster) hazard is a natural and technical disaster in which an industrial facility is damaged or a technical disaster occurs due to a natural disaster. The seriousness of the Natech risk has been confirmed by the Tohoku earthquake and subsequent tsunami. Assessing the frequency of accident scenarios associated with the initiation of Natech is an important task in the Quantitative Risk assessment (QRA). In Korea, the frequency of heavy rains and floods is increasing due to the impact of climate change. Floods, on the other hand, can lead to Loss of Containment (LOC) of hazardous materials. The purpose of this study is to quantitatively analyze the risks caused by flooding in industrial facilities handling large quantities of hazardous materials. The introduction of Natech scenarios in the QRA first selects flood events, and analyzes frequency and intensity of events. After that, set the possible targets and calculate the risk for each target. After selecting the scenario, the reliability of the scenario is evaluated. In the case study, a quantitative risk assessment without considering floods and a quantitative risk assessment considering floods were conducted to compare. Considering the flood issue, the risk was significantly increased and this implies that risk assessment in the future needs to consider scenarios triggered from natural disasters.