Effects of fiber shape, aspect ratio, and volume fraction on flexural behavior of ultra-high-performance fiber-reinforced cement composites

Yoo, Doo-Yeol; Kim, Soonho; Park, Gi-Joon; Park, Jung-Jun; Kim, Sung-Wook

doi:10.1016/j.compstruct.2017.04.069

Cited by 299 publications

(95 citation statements)

References 20 publications

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“…This strength reduces to a greater magnitude with the increase of W/C ratios compare with compressive properties of concrete (Mohamed, 2016). The effect of cement proportion and w/c ratio on adhesion strength of the seaweedmodified composites has not been studied yet, (Yoo, Kim, Park, Park, & Kim, 2017). reported the effect of higher cement proportion and W/C ratio while the shrinkage of cement mortars was enhanced.…”

Section: Problem Statementmentioning

confidence: 99%

Effect Of Water-Cement Ratio On Performance Of Seaweed-Modified Mortars

Siddique¹,

Wahid²

2019

The European Proceedings of Social and Behavioural Sciences

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Section: Problem Statementmentioning

confidence: 99%

Effect Of Water-Cement Ratio On Performance Of Seaweed-Modified Mortars

Siddique¹,

Wahid²

2019

The European Proceedings of Social and Behavioural Sciences

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“…Yoo et al [13], investigated the effect of fibers shape, length and aspect ratio on the flexural behavior of ultra-high performance fiber reinforced cement composites (UHP-FRCC) by using straight, hooked, and twisted steel fibers. For compressive strength test, cylindrical specimens were used with 200 mm height and 100 mm diameter.…”

Section: Figure 1 Typical Steel Fiber Profiles Frequently Used In Simentioning

confidence: 99%

Effects of Steel Fibers Geometry on the Mechanical Properties of SIFCON Concrete

2020

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This research aims to shed light on the effect of steel fiber shape, length, diameter, and aspect ratio on the mechanical properties of slurry infiltration fiber reinforced concrete (SIFCON). This study comprised of casting and testing three groups of SIFCON specimens with 6% fiber volume fraction. The first group was reinforced with micro steel fiber, other reinforced by hook end steel fibers, while the last group of specimens reinforced by mixing two shape of steel fiber as hybrid fiber (3% micro steel fiber +3% hook end steel fiber). Silica fume was used as a partial replacement (10%) by weight of cement. 3.7% super plasticizer was used to make the slurry liquid enough to penetrate through the fiber network, while the w/c ratio kept constant at 0.33. It was found from the results achieved that the compressive strength, static modulus of elasticity, splitting tensile strength and toughness are extremely affected by the geometry of fibers because the network of fibers formed and their density depends on the size and shape of fibers. Where the values of micro steel fibers are far outweighing the values of hooked end fibers. It was also deduced from empiricism results that combining long and short fibers gives excellent results.

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“…Their density was 7.9 g/cm 3 and the tensile strength was approximately 1100 MPa. Because the post-cracking tensile strength of fiber-reinforced concrete is affected by the fiber reinforcing index, v f × l f /d f , identical volume fractions and aspect ratios were applied for all hooked-end steel fibers with different end deformations [18]. Here, v f is the fiber volume fraction, l f is the fiber length, and d f is the fiber diameter.…”

Section: Compressive and Bending Testsmentioning

confidence: 99%

Effects of Hooked-End Steel Fiber Geometry and Volume Fraction on the Flexural Behavior of Concrete Pedestrian Decks

2019

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This study investigates the effects of hooked-end fiber geometry and volume fraction on the flexural behavior of concrete pedestrian decks. To achieve this, three different fiber geometries, i.e., three-dimensional (3D), four-dimensional (4D), and five-dimensional (5D), and volume fractions of 0.37%, 0.6%, and 1.0% were considered. Test results indicate that a higher number of hook ends can more effectively enhance the flexural strength and flexural strength margin at all volume fractions than a lower number, so that the order of effectiveness of hooked-end fibers on the flexural strength parameters was as follows: 5D > 4D > 3D. To satisfy the ductility index of 0.39, the amounts of 3D, 4D, and 5D hooked steel fibers should be in the range of 0.98%‒1.10%. Moreover, at a fiber volume fraction of 1.0%, only multiple cracking behaviors were observed, and the numerical results indicated that the volume fraction should be equal to 1.0% to guarantee a deflection-hardening response of pedestrian decks, regardless of the hooked-end fiber geometry. Consequently, a 1.0% by volume of hooked-end steel fiber is recommended to replace the minimum longitudinal steel rebars and guarantee a ductile flexural behavior with multiple cracks for pedestrian decks made of high-strength concrete.

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Effects of fiber shape, aspect ratio, and volume fraction on flexural behavior of ultra-high-performance fiber-reinforced cement composites

Cited by 299 publications

References 20 publications

Effect Of Water-Cement Ratio On Performance Of Seaweed-Modified Mortars

Effect Of Water-Cement Ratio On Performance Of Seaweed-Modified Mortars

Effects of Steel Fibers Geometry on the Mechanical Properties of SIFCON Concrete

Effects of Hooked-End Steel Fiber Geometry and Volume Fraction on the Flexural Behavior of Concrete Pedestrian Decks

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