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Title |
Flexural Performance Characteristics of High Performance Slurry Infiltrated Fiber Reinforced Cementitious Composite according to Fiber Volume Fraction
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Authors |
김승원(Seung-Won Kim) ; 조현명(Hyun-Myung Cho) ; 이학용(Hak-Yong Lee) ; 박철우(Cheol-Woo Park) |
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DOI |
http://dx.doi.org/10.11112/jksmi.2015.19.4.109 |
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Keywords |
HPFRCC ; SIFCON ; 섬유혼입률 ; 휨인성 ; 잔류강도 HPFRCC ; SIFCON ; Fiber volume fraction ; Flexural toughness ; Residual strength |
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Abstract |
High performance fiber reinforced cementitious composite (HPFRCC) can provide high fracture energy absorption as well as high strength with high fiber volume fraction. The increased fracture energy helps resisting high frequency loadings, such as earthquake, impact or blast. This study investigates the flexural performance of slurry infiltrated fiber concrete (SIFCON), one of the important HPFRCC, with respect to varying fiber volume fraction. The maximum fiber volume fraction was 8.0 % and reduced to 6.0% by 0.5% and the maximum volume fraction is obtained by packing fibers with simple tapping by hands. The used fiber was a steel fiber with the length 30 mm and the diameter of 0.5 mm. The flexural strengths were 48.7 MPa at 8.0 % and 22.8 MPa at 6.0 %. The measured flexural strength is much higher compared to other cememtitious composite materials but decreased proportional to the fractions. This result implies that for SIFCON considered herein the reduced amount of steel fibers may affect its flexural performance in a negatively way. The flexural toughness, an index to represent the fracture energy absorption, also decreased with the reduced fiber amount.
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