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스무스 강섬유 보강 시멘트 복합체의 전기적 특성에 관한 실험적 연구
이예찬(Lee, Yae-Chan),김규용(Kim, Gyu Yong),편수정(Pyeon, Su jeong),서동균(Suh, Dong Kyun),유하민(Eu, Ha Min),남정수(Nam, Jeong Soo) 대한건축학회 2021 대한건축학회 학술발표대회 논문집 Vol.41 No.2
In the case of a fiber-reinforced cement composite in which conductive fibers are mixed, if AC resistance is measured and expressed in the Nyquist diagram, two cusp corresponding to the composite resistance (Rc) and the matrix resistance (Rm) are generated, and the fiber affects Rc. In this study, AC resistance was measured by containing smooth steel fiber by length and volume fraction. As a result, the longer the length of the fiber and the higher the mixing rate, the lower the resistance was measured. In addition, the shape of the Nyquist diagram was different depending on the curing method, which is believed to have affected the microstructure of the matrix.
강섬유 종류에 따른 시멘트 복합체의 전기전도도 측정에 대한 실험적 연구
이예찬 ( Lee Yae-chan ),김규용 ( Kim Gyu-yong ),남정수 ( Nam Jeong-soo ),이상규 ( Lee Sang-kyu ),서동균 ( Shu Dong-kyun ),유하민 ( Eu Ha-min ) 한국건축시공학회 2020 한국건축시공학회 학술발표대회 논문집 Vol.20 No.1
The purpose of this study is to measure the electrical conductivity of cementitious composites as an early step to obtain shielding performance by mixing various type of steel fiber into cementitious composites, the main building material of protection facility, to shield electromagnetic pulse (EMP) damage. Fiber such as conductors as amorphous metallic fiber, hooked steel fiber, and smooth steel fiber are mixed into cementitious composites to give electrical conductivity and measure the impedance of concrete using LCR meter. By doing this, the electrical conductivity of each type of steel fiber reinforced cementitious composites (FRCC) is compared.
섬유 종류에 따른 섬유 보강 시멘트 복합체의 전기적 특성에 대한 실험적 연구
이예찬 ( Lee Yae-chan ),김규용 ( Kim Gyu-yong ),한승현 ( Han Seung-hyeon ),최윤성 ( Choi Youn-sung ),김문규 ( Kim Moon-kyu ),남정수 ( Nam Jeong-soo ) 한국건축시공학회 2023 한국건축시공학회 학술발표대회 논문집 Vol.23 No.1
The purpose of this study is to compare and analyze the effect of type and volume fraction of fiber on the electrical conductivity and shielding effectiveness of cementitious composites. The large specific surface area of amorphous metallic fiber, as well as the high number of fibers per unit weight, provided an advantage in the formation of conductive path. As the result, the electrical conductivity of amorphous metallic fiber was evaluated to be higher, and the shielding effectiveness was also higher. However, the shielding effectiveness according to electrical conductivity was confirmed to have a threshold point, and further research is needed to improve it.