http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
재수화 및 재가열을 통한 초고성능 콘트리트의 강도 증진
강현욱 ( Kang Hyunuk ),문주혁 ( Moon Juhyuk ) 한국구조물진단유지관리공학회 2020 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.24 No.1
초고성능 콘크리트 제조는 일반적으로 열처리를 동반하여 단기간에 강도발현을 촉진시케 된다. 본 연구에서는 일반적인 초고성능 콘크리트와는 다른 양생조건을 적용하였을 때의 구조적인 특성을 밝혀내고자 하였다. 압축강도실험을 기반으로 초고성능 콘크리트의 재수화반응과 재가열이 일반적인 초고강도 콘크리트의 경우와 비교하였으며, 그 결과 재수화 및 재가열 절차가 일반적인 초고성능 콘크리트의 강도를 크게 증진시키는 것으로 확인되었다.
탄소나노튜브와 나노실리카의 혼입량 변화가 고온에 노출된 시멘트 페이스트의 역학적 성능 회복에 미치는 영향
서형원 ( Suh Heongwon ),지현석 ( Jee Hyeonseok ),박태훈 ( Park Taehoon ),배성철 ( Bae Sungchul ) 한국건축시공학회 2019 한국건축시공학회 학술발표대회 논문집 Vol.19 No.2
When concrete is exposed to fire, the decomposition of Portland cement paste results in critical damage to the concrete structure of a building. However the recovery process of the damaged concrete structure has not yet been fully elucidated. In addition, research on appropriate additives such as carbon nanotube (CNT) and nanosilica has been increasing recently, however, investigation of CNT and nanosilica incorporated cement paste after decomposition of CNT by high temperature is not fully investigated. In this study, we investigated the physicochemical properties of CNT incorporated cement paste under different temperatures (200℃, 500℃ and 800℃). Also, the effects of different rehydration conditions (20℃ 60% RH and in water for different curing times) on the recovery of the paste were studied. The changes in tensile strength, surface observation of the specimens were characterized. In addition, the decomposition and formation of hydrates in the paste due to the heating process were studied using X-ray diffraction. The results showed that incorporation of nanosilica enhanced tensile strength after heating to each target temperatures.
탄소나노류브의 혼입량 변화가 고온에 노출된 시멘트 페이스트의 역학적 성능 회복에 미치는 영향
서형원 ( Suh Heong-won ),박태훈 ( Park Tae-hoon ),배성철 ( Bae Sung-chul ) 한국건축시공학회 2019 한국건축시공학회 학술발표대회 논문집 Vol.19 No.1
When concrete is exposed to fire, the decomposition of Portland cement paste results in critical damage to the concrete structure of a building. Although the behavior of cement pastes after heating provides crucial information with respect to the reuse of the building exposed to fire, the recovery process of the damaged concrete structure has not yet been fully elucidated. In addition, research on appropriate additives such as carbon nanotube (CNT) has been increasing recently, however, investigation of CNT incorporated cement paste after decomposition of CNT by high temperature is not fully investigated. In this study, we investigated the physicochemical properties of CNT incorporated cement paste under different temperatures (200°C, 500°C and 800°C). Also, the effects of different rehydration conditions (20°C 60% RH and in water for different curing times) on the recovery of the paste were studied. The changes in tensile and compressive strength, surface observation of the specimens were characterized. In addition, the decomposition and formation of hydrates in the paste due to the heating process were studied using X-ray diffraction.