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충남대학교

충남대학교 건설재료시공학연구실

Building material & construction lab.

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프린트 확대 축소

국내전문학술

손민재, 김규용, 이상규, 김홍섭, & 남정수. (2017). 후크형 강섬유와 폴리비닐알코올 섬유의 혼합 비율과 변형속도에 따른 하이브리드 섬유보강 시멘트복합체의 인장거동. 한국구조물진단유지관리공학회 논문집 (KSMI), 21(6), 98-105.
손민재, 김규용, 이상규, 김홍섭, & 남정수. (2017). 후크형 강섬유와 폴리비닐알코올 섬유의 혼합 비율과 변형속도에 따른 하이브리드 섬유보강 시멘트복합체의 인장거동. 한국구조물진단유지관리공학회 논문집 (KSMI), 21(6), 98-105.
작성자 관리자
조회수 135 등록일 2017.11.01
주저자 손민재
교신저자 042-821-7731
공동저자 이상규, 김홍섭, 남정수
학술지명 한국구조물진단유지관리공학회 논문집 제 21권 제 3호
Abstract
In this study, the fiber blending ratio and strain rate effect on the tensile behavior of hybrid fiber reinforced cement composite was evaluated. Hooked steel fiber and polyvinyl alcohol fiber were used for reinforcing fiber. The fiber blending ratio of HSF+PVA were 1.5+0.5, 1.0+1.0 and 0.5+1.5vol.%. As a results, the tensile strength, strain capacity and fracture toughness of the hooked steel fiber reinforced cement composites were improved by the increase of the bond strength of the fiber and the matrix according to increase of strain rate. However, the tensile stress sharply decreased after the peak stress because of the decrease in the number of straightened pull-out fibers by micro cracks in the matrix around hooked steel fiber. On the other hand, PVA fiber showed cut-off fracture at strain rate 10-6/s with multiple cracks. However, at the strain rate 101/s, the multiple cracks and strain capacity were decreased because of the pull-out fracture of PVA fiber. 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. In addition, the synergistic response of fracture toughness was positive 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.