Study of the effect of the fibers’ orientation on the post-cracking behavior of steel fiber reinforced concrete from wedge-splitting tests and computed tomography scanning

González, Dorys C.; Mínguez, Jesús; Cabrera, Miguel; Cambronero, Francisco; Aragón, Guillermo

doi:10.1016/j.conbuildmat.2018.10.104

Cited by 26 publications

(8 citation statements)

References 39 publications

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“…However, the conclusion that the fracture energy of ASFRC was higher than that of SFRC was widely accepted. Similar conclusions were also reported by González [46] and Antonio [47]. On the other hand, due to the use of straight steel fiber, the fracture energy of ASFRC was 31-70% greater than SFRC [17].…”

Section: Fracture Energysupporting

confidence: 88%

Investigation on Fracture Behavior of Cementitious Composites Reinforced with Aligned Hooked-End Steel Fibers

et al. 2022

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Aligning steel fibers is an effective way to improve the mechanical properties of steel fiber cementitious composites (SFRC). In this study, the magnetic field method was used to prepare the aligned hooked-end steel fiber cementitious composites (ASFRC) and the fracture behavior was investigated. In order to achieve the alignment of steel fibers, the key parameters including the rheology of the mixture and magnetic induction of electromagnetic field were theoretically analyzed. The results showed that, compared with SFRC, the cracking load and the ultimate load of ASFRC were increased about 24–55% and 51–86%, respectively, depending on the fiber addition content. In addition, the flexural tensile strength and residual flexural strength of ASFRC were found to increase up to 105% and 100%, respectively. The orientation of steel fibers also has a significant effect on energy consumption. The fracture energy of ASFRC was 56–70% greater than SFRC and the reinforcement effect of hooked-end steel fiber was higher than straight steel fiber. The fibers in the fracture surface showed that not only was the number of fibers of ASFRC higher than that of SFRC, but also the orientation efficiency factor of ASFRC was superior to SFRC, which explains the improvement of fracture behavior of ASFRC.

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Section: Fracture Energysupporting

confidence: 88%

Investigation on Fracture Behavior of Cementitious Composites Reinforced with Aligned Hooked-End Steel Fibers

et al. 2022

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“…Similarly, the paper of Gonzalez and coworkers (González et al, 2018a) is noteworthy. In it, fiber-reinforced concrete prisms were fabricated from which cubes were extracted and then subjected to wedge splitting tests (WST) in two different configurations.…”

Section: Introductionmentioning

confidence: 86%

“…9, 10, 11, it is possible to obtain a parameter called efficiency index with respect to the X, Y and Z axes, respectively ( ei x , ei y and ei z ), according to the following equations (Eq. 4) (González et al, 2018a;Mínguez et al, 2018;Vicente et al, 2019a): where f i,x , f i,y and f i,z are the relative frequencies of the fiber orientation with respect to the X, Y and Z axes, respectively, α x , α y and α z the average angle of each range and n the number of ranges in which the histogram is divided (18 in this case).…”

Section: Fiber Orientationmentioning

confidence: 99%

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Effect of Fiber Orientation on the Fatigue Behavior of Steel Fiber-Reinforced Concrete Specimens by Performing Wedge Splitting Tests and Computed Tomography Scanning

González,

Mena-Alonso,

Mínguez

et al. 2024

Int J Concr Struct Mater

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This paper shows the relationship, in steel fiber-reinforced concrete, between fiber orientation and fatigue response through the combined use of computed tomography (CT), digital image processing (DIP) software and wedge splitting test (WST). The WST cubes were extracted from conventional 150 × 150× 600 concrete prisms and a groove and notch were carved on different faces in such a way that in half of the test specimens the fibers are oriented mostly perpendicular to the breaking surface and, in the other half, the fibers are mostly oriented parallel to the breaking surface. Fiber orientation was obtained using a CT device and DIP software from a miniprism extracted from the previously mentioned concrete prisms. The results show that there is a strong correlation between the crack-sewing fiber orientation on the one hand and fatigue life and crack opening rate per cycle on the other hand. Cubes with a higher percentage of fibers perpendicular to the crack surface (i.e., with a higher efficiency index) show a longer fatigue life and a lower crack opening rate per cycle, while cubes with a lower efficiency index show a shorter fatigue life and a higher crack opening rate per cycle.

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“…On the other hand, the air voids result in darker regions when compared to the matrix. In this way, the orientation of the steel fibers has already been analyzed in specimens of steel fiber reinforced concrete and has been correlated with behaviors such as post-cracking (77) or tensile response (78).…”

Section: The Use Of X-ray Microtomography For Microstructural Charact...mentioning

confidence: 99%

Characterization of Strain-Hardening Cement-Based Composites: Deep Learning, in-Situ X-Ray Microct and Digital Volume Correlation

Lorenzoni¹

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Last but not least, I would like to thanks all my family's care and love. I am grateful to my brothers Rodrigo and Rafaela and my dad Dimas for understanding and supporting me on this journey. To my nephews Lucas and Caio, for filling my life with happiness. My greatest gratitude goes to my mom Valéria, who often believed in me more than I did and encouraged me to move forward. Thanks for being my inspiration.

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Study of the effect of the fibers’ orientation on the post-cracking behavior of steel fiber reinforced concrete from wedge-splitting tests and computed tomography scanning

Cited by 26 publications

References 39 publications

Investigation on Fracture Behavior of Cementitious Composites Reinforced with Aligned Hooked-End Steel Fibers

Investigation on Fracture Behavior of Cementitious Composites Reinforced with Aligned Hooked-End Steel Fibers

Effect of Fiber Orientation on the Fatigue Behavior of Steel Fiber-Reinforced Concrete Specimens by Performing Wedge Splitting Tests and Computed Tomography Scanning

Characterization of Strain-Hardening Cement-Based Composites: Deep Learning, in-Situ X-Ray Microct and Digital Volume Correlation

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