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Title |
Effects of Aggregate Size and Steel Fiber Volume Fraction on Compressive Behaviors of High-Strength Concrete
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Authors |
안경림(Kyung-Lim Ahn) ; 장석준(Seok-Joon Jang) ; 장상혁(Sang-Hyeok Jang) ; 윤현도(Hyun-Do Yun) |
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DOI |
http://dx.doi.org/10.4334/JKCI.2015.27.3.229 |
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Keywords |
강섬유 보강 콘크리트 ; 굵은 골재 최대 크기 ; 압축거동 ; 압축인성 steel fiber reinforced concrete(SFRC) ; compressive behavior ; curing age ; aggregate size ; compressive toughness index |
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Abstract |
This paper describes the effect of aggregate size on compressive behavior of high-strength steel fiber reinforced concrete. The Specified compression strength is 60 MPa and the range of fiber volume fraction is 0~2%. The main variable is the aggregate size, which was used for the aggregate size of 8 and 20 mm. So, ten concrete mixtures were prepared and tested to evaluate the fresh and hardened properties of SFRC at curing ages (7, 14, 28, 56 and 91 days), respectively. Items estimated in this study are the fresh properties (air contents, slump), hardened properties (compressive strength, modulus of elasticity, post-peak response and compressive toughness). As a result, the aggregate size has little effect on the compressive strength and modulus of elasticity. On the other hand, the ductile behavior was shown after post peak and the compressive toughness was increasing as decreasing the aggregate size. These effects are clearly represented in the fiber volume fraction 2%, which are the point appeared fiber ball. It is considered that the decreasing the aggregate size has effect on the fiber dispersibility.
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