Tarig M. A. AHMED, Abid ABUTAİR, Sokrates IOANNOU

Tensile Bond Strength of Reinforced Concrete Beams Reinforced with Steel Fibers

The effects of steel fibers, or SF, on the tensile bond strength of the reinforced concrete beams, were studied in an experimental investigation, the findings of which are presented in this paper. Tests show that the steel fibers enhanced both the tensile bond strength of reinforced concrete beams and some of the mechanical properties of concrete. The addition of steel fibers in the concrete mix improves some of the engineering properties of concrete such as the compressive strength of cube, cylinder, and modulus of rupture, and decreases other properties namely: the modulus of elasticity, and the indirect tensile test. The addition of steel fibers too leads to an increase in the ultimate bond strength of the beams and delivers a lower deflection in the steel fibers reinforced concrete beams compare to the control beams. This study led to the fact that It is recommended that a beam with a 43Ø lap length will fail at a load similar to the datum beam, i.e. beam without lap. All the lapped beams reported bond failure lower than the datum beam. The presence of steel fibers diminishes the slippage within the laps.

Keywords:

tensile bond strength steel fibers, compressive strength, deflection,

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