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충남대학교

충남대학교 건설재료시공학연구실

Building material & construction lab.

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프린트 확대 축소

국내전문학술

한상휴, 김규용, 김홍섭, 김정현, & 남정수. (2015). 섬유 종류에 따른 시멘트복합체의 고속 비상체 충격에 대한 배면파괴저감 및 균열특성 평가. 콘크리트학회 논문집, 27(2), 157-167.
한상휴, 김규용, 김홍섭, 김정현, & 남정수. (2015). 섬유 종류에 따른 시멘트복합체의 고속 비상체 충격에 대한 배면파괴저감 및 균열특성 평가. 콘크리트학회 논문집, 27(2), 157-167.
작성자 관리자
조회수 106 등록일 2015.04.01
주저자 한상휴
교신저자 042-821-7731
공동저자 김홍섭, 김정현, 남정수
학술지명 한국콘크리트학회
ABSTRACT
 
Cement composites subjected to high-velocity projectile shows local failure and it can be suppressed by improvement
of flexural toughness with reinforcement of fiber. Therefore, researches on impact resistance performance of cement composites are
in progress and a number of types of fiber reinforcement are being developed. Since bonding properties of fiber with matrix, specific
surface area and numbers of fiber are different by fiber reinforcement type, mechanical properties of fiber reinforced cement
composites and improvement of impact resistance performance need to be considered. In this study, improvement of flexural
toughness and failure reduction effect by impact of high-velocity projectile have been evaluated according to fiber type by mixing
steel fiber, polyamide, nylon and polyethylene which are have different shape and mechanical properties. As results, flexural
toughness was improved by redistribution of stress and crack prevention with bridge effect of reinforced fibers, and scabbing by
high-velocity impact was suppressed. Since it is possible to decrease scabbing limit thickness from impact energy, thickness can be
thinner when it is applied to protection. Scabbing of steel fiber reinforced cement composites was occurred and it was observed that
desquamation of partial fragment was suppressed by adhesion between fiber and matrix. Scabbing by high-velocity impact of
synthetic fiber reinforced cement composites was decreased by microcrack, impact wave neutralization and energy dispersion with a
large number of fibers.