http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
다양한 전처리 기술을 적용한 유리 골재의 알칼리-실리카 반응
손연방 ( Sun Lianfang ),김홍현 ( Kim Honghyun ),변정안 ( Byun Jungan ),지광습 ( Zi Goangseup ) 한국구조물진단유지관리공학회 2019 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.23 No.2
The focus of this study is to investigate the ASR of concrete incorporating pre-treated soda-lime glass as aggregates. The glass aggregates were pre-treated with three different techniques, i.e. Ca(OH)2, NaOH and the mixed solution. The results indicate that all the pre-treatment techniques showed a decrease effect on ASR and such an effect increase with treatment time, the mixed solution showed the best effect. The pre-treated glass aggregate at the mixed solution at 80℃ for 7 days providing a 45% reduction in the expansion caused by ASR, and it can be considered innocuous based on ASTM C1260.
손연방 ( Sun Lian Fang ),유일환 ( You Ilhwan ),박진우 ( Park Jinwoo ),지광습 ( Zi Goangseup ) 한국구조물진단유지관리공학회 2018 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.22 No.1
This paper presents an improved double diffusion model (DDM) for the alkali silica reaction. By this model we could simulate the diffusion process of alkali both in concrete (macro-scale) and aggregate (micro-scale). As the alkali source, either internal or outside cases can be analyzed through this model. Concrete with different size groups of aggregate distribution also can be analyzed. Numerical simulation is utilized to analyze the ion concentration both inside the concrete and aggregate at different moment of penetration.
콘크리트의 염화물 침투 내구성능과 비용을 고려한 배합설계 최적화 기법
박진우 ( Park Jinwoo ),손연방 ( Sun Lianfang ),이유진 ( Lee Yujin ),지광습 ( Zi Goangseup ) 한국구조물진단유지관리공학회 2019 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.23 No.1
This research provides optimization techniques for concrete mixture design for chloride penetration performance and cost. For optimization, objective functions are constructed with variables representing factors used in concrete mixture design process. Multi Objective Harmony Search Algorithm (MOHSA) is used for optimization and the result gives relationship between concrete’s chloride ion diffusivity and cost.