An experimental study on the fatigue failure of steel fibre reinforced concrete at a single fibre level

Fataar, Humaira; Combrinck, Riaan; Boshoff, William P.

doi:10.1016/j.conbuildmat.2021.123869

Cited by 17 publications

(5 citation statements)

References 26 publications

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“…Therefore, more researchers focus on the study of steel fiber reinforced concrete to enhance its resistance to cracks, impacts, and fatigue. SFRC has outstanding mechanical properties, such as tensile strength [1], bending strength [2], crack resistance [3], impact resistance [4], fatigue resistance [5,6], and high toughness [7]. Its high durability makes it a favorite material for engineers [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

The Effects of Steel Fiber Types and Volume Fraction on the Physical and Mechanical Properties of Concrete

Wang

Zhang

et al. 2023

Coatings

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Different types and amounts of steel fibers have varying effects on the improvement of concrete’s mechanical properties. In order to identify the most suitable steel fiber types for the practical production of prefabricated pavements and derive a formula to predict and evaluate the mechanical properties based on steel fiber volume fraction, this study conducted experimental research on the physical mechanical properties of concrete using the method of equal volume substitution of coarse aggregate. The influence of steel fiber type and volume fraction on the microstructure and failure mechanism of steel fiber reinforced concrete (SFRC) was analyzed through electron microscopy scanning. The mechanical properties of plain concrete were used as benchmark. The results showed that when the steel fiber volume fractions were 0.6% and 1.5%, the bending and split tensile strengths of milled steel fibers were 3.1% higher than those of hooked-end steel fibers and the compressive strength of SFRC was significantly increased by 13.5%. The comprehensive mechanical properties of wave-shaped steel fibers were inferior to the first two types. Considering the requirements of SFRC in engineering, milled steel fibers are more suitable to be concrete components. This is because the tangling property of the hooked-end steel fibers makes them difficult to be shaped. In contrast, the smooth surface of milled steel fibers exerts a smaller impact on the forming of specimen and they are more economical. The mechanical properties of SFRC improve as the volume fraction of steel fibers increases from 0% to 2%, but start to decline when the volume fraction exceeds 2%. A volume fraction of 0.6% for steel fibers is sufficient to meet the standard for bending and tensile strength in heavy-duty concrete pavements. Finally, the relationship expressions between the compressive strength, flexural strength, and split tensile strength of SFRC and the steel fiber volume fraction were obtained through fitting the experimental data using Origin software.

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Section: Introductionmentioning

confidence: 99%

The Effects of Steel Fiber Types and Volume Fraction on the Physical and Mechanical Properties of Concrete

Wang

Zhang

et al. 2023

Coatings

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“…The increased use of SFRC brings with its defects and failures, as with any technology. Although steel fibre reinforced concrete has been in common use for a long time, the material and structures built from it are still subject to research and development, especially in the field of shear failure [1,2], fatigue failure [3] or computational models for failure analysis [4]. Failures, such as crack development, are contributed to, among other things, inappropriate consistency of fresh SFRC, which is a kind of technological instability.…”

Section: Introductionmentioning

confidence: 99%

The influence of steel fibre amount on the consistency, volume changes and compressive strength of concrete

Vymazal,

Misák,

Hrabová

et al. 2023

J. Phys.: Conf. Ser.

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The paper focuses on the consistency of fresh steel fibre reinforced concrete in relation to the amount of steel fibre used. Consistency was determined by the slump test and the flow table test. Furthermore, the paper deals with monitoring the compressive strength and volume changes during the maturing process of steel fibre reinforced concrete. Volume changes were monitored using a shrinkage drain. The results of the steel fibre reinforced concrete properties are compared with the values of the reference concrete without fibres and with each other. The result is an evaluation of how the amount of fibre affects the properties of fresh and hardened concrete. The dependence between consistency, compressive strength and shrinkage of steel fibre reinforced concrete is also established.

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“…The applications of FRC may also be exposed to fatigue loading, which can occur in different forms such as environmental fatigue, corrosion fatigue and thermal fatigue [4]. According to Fataar [5], these forms of fatigue loading may occur independently or in conjunction with applied fatigue loading, in the form of cyclic, variable uniaxial or multiaxial loading. Sustained exposure to static and fatigue loads on a structure therefore affects the serviceability of a structure as the stiffness of the component materials is compromised.…”

Section: Introductionmentioning

confidence: 99%

Behaviour of Steel Fibre Reinforced Concrete Pavements on A Single Fibre Level

2022

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Concrete is a popular construction material used all around the globe. It is strong in compression and weak in tension. To mitigate this tensile weakness, various reinforcement methods have been used over the years, of these, fibre reinforced concrete (FRC) has gained popularity. Fibres not only improve the tensile strength of the concrete matrix, but also control crack propagation through crack bridging action. The goal of this study is to investigate the long-term behaviour of FRC pavements through conduction of static and fatigue meso-scale level tests using different steel fibres. To achieve this goal, the influence of different fibre geometries and embedment angles on the pull-out behaviour of fibres in FRC was investigated first. This was carried out by examining 60mm Dramix 3D steel and 5D steel fibres at single fibre level. The embedment depth was kept constant at half the fibre length, and the fibre embedment angles were tested at 0°, 15° and 30°. The average maximum pull-out load, Amax, was determined first through static tests then fatigue tests were carried out using 85% of the Amax value on pre-damaged samples. These tests indicated that an increase in fibre embedment angle and number of hooks leads to additional anchorage of the fibre. Fibre pull-out was found to be the dominant fibre failure mechanism for the static single fibre pull-out tests (SFPTs).

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An experimental study on the fatigue failure of steel fibre reinforced concrete at a single fibre level

Cited by 17 publications

References 26 publications

The Effects of Steel Fiber Types and Volume Fraction on the Physical and Mechanical Properties of Concrete

The Effects of Steel Fiber Types and Volume Fraction on the Physical and Mechanical Properties of Concrete

The influence of steel fibre amount on the consistency, volume changes and compressive strength of concrete

Behaviour of Steel Fibre Reinforced Concrete Pavements on A Single Fibre Level

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