Modeling of concrete containing steel fibers: toughness and mechanical properties

Ismail H. Cagatay , Riza Dincer

Abstract

In this study, effect of steel fibers on toughness and some mechanical properties of concrete were investigated. Hooked-end steel fibers were used in concrete samples with three volume fractions (vf) of 0.5%, 0.75% and 1% and for two aspect ratios (l/d) of 45 and 65. Compressive and flexural tensile strength and modulus of elasticity of concrete were determined for cylindrical, cubic and prismatic samples at the age of 7 and 28 days. The stress-strain curves of standard cylindrical specimens were studied to determine the effect of steel fibers on toughness of steel-fiber-reinforced concrete (SFRC). In addition, the relationship between compressive strength and the flexural tensile strength of SFRC were reported. Finally, a simple model was proposed to generate the stress-strain curves for SFRC based on strains corresponding to the peak compressive strength and 60% of peak compressive stress. The proposed model was shown to provide results in good correlation with the experimental results.

Key Words

fiber reinforcement, toughness, mechanical properties, compressive strength, flexural strength.

Address

Ismail H. Cagatay — University of Cukurova, Civil Engineering Department, Adana, Turkey
Riza Dincer — University of Cukurova, Vocational School of Adana, Adana, Turkey

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