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변형속도가 하이브리드 섬유보강 시멘트복합체의 인장 파괴 에너지 흡수 능력에 미치는 영향
손민재 ( Son Min Jae ),김규용 ( Kim Gyu Yong ),이상규 ( Lee Sang Kyu ),황의철 ( Hwang Eui Chul ),남정수 ( Nam Jeong Soo ) 한국구조물진단유지관리공학회 2019 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.23 No.2
The purpose of this study was to evaluate the tensile fracture energy absorption capacity of hybrid fiber reinforced cement composite by strain rate. Experiment result, it was confirmed that PVA suppressed the microcrack around the HSF at the strain rate 101/s, which resulted in the improvement of the pullout resistance of the HSF.
고변형속도 조건에서 섬유 혼합비가 하이브리드 섬유보강 시멘트복합체의 인장특성에 미치는 영향
손민재 ( Son Min-jae ),김규용 ( Kim Gyu-yong ),이보경 ( Lee Bo-kyeong ),이상규 ( Lee Sang-kyu ),김경태 ( Kim Gyeong-tae ),남정수 ( Nam Jeong-soo ) 한국건축시공학회 2017 한국건축시공학회 학술발표대회 논문집 Vol.17 No.2
In this study, the tensile properties of mono and hybrid fiber reinforced cement-based composite according to fiber blending ratio under the high strain rate was evaluated. Experimental results, the HSF1.5PVA0.5 shown the highest tensile strength because the PVA fiber suppressed the micro cracks in the matrix around the hooked steel fiber and improved the pull-out resistance of hooked steel fiber. Thus, DIF of strain capacity and fracture toughness of HSF1.5PVA were greatly improved. Also, the fracture toughness was greatly improved because the tensile stress was slowly decreased after the peak stress by improvement of the pull-out resistance of hooked steel fiber at strain rate 101/s.
하이브리드 섬유보강 시멘트복합체의 인장거동에 미치는 변형속도의 영향
손민재 ( Son Min-jae ),김규용 ( Kim Gyu-yong ),이보경 ( Lee Bo-kyeong ),이상규 ( Lee Sang-kyu ),김경태 ( Kim Gyeong-tae ),남정수 ( Nam Jeong-soo ) 한국건축시공학회 2017 한국건축시공학회 학술발표대회 논문집 Vol.17 No.1
In this study, the tensile behavior of single and hybrid fiber reinforced cement composite according to strain rate was evaluated. Experimental results, in the strain rate 10-6/s, fiber reinforced cement composite showed improved of tensile strength and decrease of strain at peak stress as SSF volume content increased. In the strain rate 101/s, the single and hybrid reinforced cement composite` s tensile properties are improved, because of the improved bond strength between the fiber and matrix. And hybrid fiber reinforced cement composite showed high energy absorption capacity, because the SSF prevented the cracking and fracture of the surrounding matrix when during the HSF pull-out.
변형속도가 강섬유 하이브리드 섬유보강 시멘트복합체의 직접인장파괴거동에 미치는 영향
손민재 ( Son Min Jae ),김규용 ( Kim Gyu Yong ),이상규 ( Lee Sang Kyu ),황의철 ( Hwang Eui Chul ),남정수 ( Nam Jeong Soo ) 한국구조물진단유지관리공학회 2019 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.23 No.1
The purpose of this study was to evaluate the direct tensile fracture behavior of steel fiber hybrid reinforced cement composite by strain rate. Experiment result, it was confirmed that SSF suppressed the microcrack around the HSF at the strain rate 101/s, which resulted in the improvement of the pullout resistance of the HSF.
표면개질에 따른 폐유리 잔골재가 모르타르의 역학적 특성 및 알칼리 실리카 반응성에 미치는 영향
손민재 ( Son Min Jae ),김규용 ( Kim Gyu Yong ),편수정 ( Pyeon Su Jeong ),서동균 ( Suh Dong Kyun ),남정수 ( Nam Jeong Soo ) 한국구조물진단유지관리공학회 2021 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.25 No.1
In this study, surface modification effect of waste glass fine aggregates on mortar to reduce slip phenomenon and ASR was analyzed. As a result, the slip phenomenon was effectively improved, and also the ASR reduction of waste glass was improved. As a result, it was confirmed that the surface modification of the waste glass fine aggregate is effective in improving the performance of the mortar.