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Compressive Behavior of Fiber-Reinforced Concrete with End-Hooked Steel Fibers

1
Department of NPP Engineering, KEPCO International Nuclear Graduate School, 658-91 Haemaji-ro, Seosaeng-myeon, Uljugun, Ulsan 689-882, Korea
2
Office of Offshore Wind Power, Korea Institute of Energy Technology Evaluation and Planning, Seoul 135-502, Korea
3
Department of Civil and Environmental Engineering, Seoul National University, Seoul 151-744, Korea
*
Author to whom correspondence should be addressed.
Academic Editor: Geminiano Mancusi
Materials 2015, 8(4), 1442-1458; https://doi.org/10.3390/ma8041442
Received: 31 January 2015 / Revised: 14 March 2015 / Accepted: 23 March 2015 / Published: 27 March 2015
(This article belongs to the Section Advanced Composites)
In this paper, the compressive behavior of fiber-reinforced concrete with end-hooked steel fibers has been investigated through a uniaxial compression test in which the variables were concrete compressive strength, fiber volumetric ratio, and fiber aspect ratio (length to diameter). In order to minimize the effect of specimen size on fiber distribution, 48 cylinder specimens 150 mm in diameter and 300 mm in height were prepared and then subjected to uniaxial compression. From the test results, it was shown that steel fiber-reinforced concrete (SFRC) specimens exhibited ductile behavior after reaching their compressive strength. It was also shown that the strain at the compressive strength generally increased along with an increase in the fiber volumetric ratio and fiber aspect ratio, while the elastic modulus decreased. With consideration for the effect of steel fibers, a model for the stress–strain relationship of SFRC under compression is proposed here. Simple formulae to predict the strain at the compressive strength and the elastic modulus of SFRC were developed as well. The proposed model and formulae will be useful for realistic predictions of the structural behavior of SFRC members or structures. View Full-Text
Keywords: steel fiber; end-hooked fiber; SFRC; compression; elastic modulus; strain at the compressive strength steel fiber; end-hooked fiber; SFRC; compression; elastic modulus; strain at the compressive strength
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Lee, S.-C.; Oh, J.-H.; Cho, J.-Y. Compressive Behavior of Fiber-Reinforced Concrete with End-Hooked Steel Fibers. Materials 2015, 8, 1442-1458.

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