Size and Shape Effect of UHPFRC Prisms Tested under Axial Tension and Bending

Frettlöhr, Björn; Reineck, Karl-Heinz; Reinhardt, Hans W.

doi:10.1007/978-94-007-2436-5_44

Cited by 8 publications

(6 citation statements)

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“…This important fact has motivated a number of research investigations to evaluate the role and contribution of a combination of fiber types. Noting that steel fibers have conventionally been the primary choice of fibers used in the UHPC mixtures, various dosages and combinations of steel micro‐fibers and macro‐fibers were tested in the past studies 1–5 . As for the steel fiber dosage, it is now proven that the tensile strength properties improve by increasing the fiber dosage up to 3.0 vol.%.…”

Section: Introductionmentioning

confidence: 99%

“…Noting that steel fibers have conventionally been the primary choice of fibers used in the UHPC mixtures, various dosages and combinations of steel micro-fibers and macrofibers were tested in the past studies. [1][2][3][4][5] As for the steel fiber dosage, it is now proven that the tensile strength properties improve by increasing the fiber dosage up to 3.0 vol.%. On the other hand, it has been reported that an optimum combination of micro-and macro-fibers can result in enhanced tensile behavior.…”

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confidence: 99%

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Ultra‐high performance concrete under direct tension: Investigation of a hybrid of steel and synthetic fibers

Karim,

Shafei

2023

Structural Concrete

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Ultra‐high performance concrete (UHPC) offers superior tensile properties in comparison to normal and high‐strength concrete. This is known to largely depend on the fibers included in the UHPC mixtures. Among the available types of fiber, steel fibers have been commonly used in the current practice. However, given the price and availability issues associated with steel fibers, there has been growing interest in benefiting from synthetic fibers in UHPC. This was the motivation for the current study to investigate the potential of five synthetic fibers by evaluating how the tensile properties of the UHPC mixtures made with a hybrid of steel and synthetic fibers are influenced under direct tension. The synthetic fibers of choice consisted of nylon, polypropylene, polyvinyl alcohol, alkali‐resistant glass, and carbon fibers. By using a dog bone test setup, the main tensile properties of the developed mixtures (i.e., direct tensile strength, elastic modulus, and stress–strain relationship) were systematically determined. The results extracted from direct tension tests were then further processed in conjunction with digital image correlation analyses to investigate the formation and propagation of cracks, as well as the post‐cracking response. The original findings reported from this study are expected to pave the way to broaden the fiber types that can be considered for the structural applications of UHPC, especially where high tensile stresses/strains are anticipated.

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Section: Introductionmentioning

confidence: 99%

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confidence: 99%

Ultra‐high performance concrete under direct tension: Investigation of a hybrid of steel and synthetic fibers

Karim,

Shafei

2023

Structural Concrete

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“…It is important to know the order of magnitude of the values that characterise UHPFRC tensile behaviour. For this purpose, the uniaxial test results according to different authors (Frettlöhr et al, 2011;Markovic, 2006) are shown in Figure 2.14 and in Figure 2.15. Figure 2.14 shows the uniaxial tensile results for two UHPFRCs with different compressive strengths.…”

Section: Uhpfrc Tensile Behaviourmentioning

confidence: 99%

“…It can be determined by testing different specimens with distinct geometries. Although it has already been conducted in (Kim et al, 2010;Frettlöhr et al, 2011), it is quite difficult to distinguish between a deterministic and a statistical (fibre orientation effect) size effect. However, it seems that the greater the specimen depth, the larger the spacing between cracks and, therefore, the lower the strain upon the peak.…”

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Characterisation of the Tensile Behaviour of Uhpfrc by Means of Four-Point Bending Tests

Martínez¹,

Ángel²

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Combining the most recent technologies in concrete, Ultra-High-Performance Fibre-Reinforced Concrete (UHPFRC) arises as a promising material for the near future. UHPFRC have shown how flexible concrete can be to adapt to the ever-changing social and environmental demands. With its high flexibility composition and its mechanical properties, UHPFRC is full of both unexplored and unexploited possibilities. Engineers should take responsibility for this task. However, it is fair to acknowledge that this is not an easy task and it requires the development of reliable and widely accepted design standards provided by the scientific community.

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Performance evaluation of Ultrahigh performance fibre reinforced concrete – A review

Shaikh

Luhar

Arel

et al. 2020

Construction and Building Materials

122

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Size and Shape Effect of UHPFRC Prisms Tested under Axial Tension and Bending

Cited by 8 publications

References 0 publications

Ultra‐high performance concrete under direct tension: Investigation of a hybrid of steel and synthetic fibers

Ultra‐high performance concrete under direct tension: Investigation of a hybrid of steel and synthetic fibers

Characterisation of the Tensile Behaviour of Uhpfrc by Means of Four-Point Bending Tests

Performance evaluation of Ultrahigh performance fibre reinforced concrete – A review

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