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Open AccessArticle

The Influence of Steel Fiber Tensile Strengths and Aspect Ratios on the Fracture Properties of High-Strength Concrete

1
Department of Architectural Engineering, Gachon University, Gyeonggi-do 461-701, Korea
2
Korea Land & Housing Corporation, Gyeongsangnam-do 52852, Korea
3
Korea Infrastructure Safety Corporation, Gyeongsangnam-do 52856, Korea
4
Department of Architectural Engineering, Chungnam National University, Daejeon 305-764, Korea
*
Author to whom correspondence should be addressed.
Materials 2019, 12(13), 2105; https://doi.org/10.3390/ma12132105
Received: 11 June 2019 / Revised: 27 June 2019 / Accepted: 28 June 2019 / Published: 30 June 2019
(This article belongs to the Special Issue High Performance Concrete)
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Abstract

Steel fiber embedded in concrete serves to reduce crack development and prevent crack growth at the macroscopic level of the concrete matrix. Steel fiber-reinforced concrete (SFRC) with high compressive concrete strength is affected primarily by the dimensions, shape, content, aspect ratio, and tensile strength of the embedded steel fiber. In this study, double-ended hook steel fiber was used in SFRC with a concrete compressive strength of 80 MPa. This fiber was used for the study variables with two aspect ratios (64, 80) and tensile strength values up to 1600 MPa. The flexural performance of the SFRC specimens was evaluated using crack mouth open displacement tests, and the test results were compared with code provisions. A modified reinforcement index was also used to quantify the flexural performance based on comparisons with fracture energy. View Full-Text
Keywords: steel fiber; fiber content; aspect ratio; toughness index; high-strength concrete steel fiber; fiber content; aspect ratio; toughness index; high-strength concrete
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Choi, W.-C.; Jung, K.-Y.; Jang, S.-J.; Yun, H.-D. The Influence of Steel Fiber Tensile Strengths and Aspect Ratios on the Fracture Properties of High-Strength Concrete. Materials 2019, 12, 2105.

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