Study of the distribution and orientation of fibers in SFRC specimens

Gettu, Ravindra; Gardner, Diane Ruth; Saldívar, Héctor; Barragán, Bryan E.

doi:10.1007/bf02480572

Cited by 161 publications

(79 citation statements)

References 4 publications

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“…This orientation effect depends highly on the vibration time and frequency and the workability and composition of the concrete and it is therefore very difficult to quantify. However, from other research [12] it is concluded that the vibration does not have a significant effect on the orientation if the specimen is only vibrated for 1 or 2 min and if the workability of the fresh concrete is not too high. The effect of vibration on the orientation of the fibres is not considered here.…”

Section: General Approachmentioning

confidence: 86%

Distribution of steel fibres in rectangular sections

Dupont¹,

Vandewalle

2005

Cement and Concrete Composites

241

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Section: General Approachmentioning

confidence: 86%

Distribution of steel fibres in rectangular sections

Dupont¹,

Vandewalle

2005

Cement and Concrete Composites

241

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“…9,10 The use of mechanical vibrators tends to cause concrete segregation and orientation of fibers to horizontal planes, leading to smaller flexural strength values. [11][12][13] Therefore, the main Discussion on this paper must be submitted within two months of the print publication. The discussion will then be published in print, along with the authors' closure, if any, approximately nine months after the print publication.…”

Section: Introductionmentioning

confidence: 99%

Evaluating steel fiber‐reinforced self‐consolidating concrete performance

Silva

Christ

Pacheco

et al. 2019

Structural Concrete

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The fiber‐reinforced self‐compacting concrete (FR‐SCC) is considered a high‐performance material, clustering characteristics of SCC combined with steel fibers. This paper assessed fresh and hardened state properties of a reference SCC and a FR‐SCC with fibers of three types and three quantities of reinforcement, totalizing 10 mixtures. Fresh state properties of the mixture were evaluated through the tests of slump‐flow, flow rate, filling ability, plastic viscosity by V‐funnel, passing ability by J‐ring and by L‐box; and hardened properties comprised compressive strength, flexural strength, and flexural toughness. Overall, it was observed that increasing the amount and length of fibers hindered the mixture workability. Also, the flexural strength and flexural toughness increased as the length and the amount of fibers increased. Regarding mechanical properties, it was not possible to identify an equivalence between the types of fibers evaluated and the compressive strength of mixtures. The flexural was proportional to the amount of fibers, with increases of up to 30% for concretes with fibers.

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“…Several methods based on experiment have been proposed for assessing the distribution and orientation of fibers in concrete matrix, such as computed tomography (CT) scans, X‐ray, image analysis, electricity resistivity and magnetic approach . Most researches using the above methods have focused on the distribution and orientation of fibers in hardened concrete or the number of fibers in a visual concrete section . In fact, the distribution and orientation of fibers change constantly when concrete is poured into formwork.…”

Section: Introductionmentioning

confidence: 99%

Three‐dimensional modeling of the distribution and orientation of steel fibers during the flow of self‐compacting concrete

Zhao

Guan

et al. 2019

Structural Concrete

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Steel fibers may be added to self-compacting concrete (SCC) to improve its mechanical performance; however, such improvement is subject to a number of conditions, an important one of which is the distribution and orientation of the fibers. The objective of this study is to propose a new method capable of predicting the variation of the distribution and orientation of steel fibers immersed in the SCC during flow. The flow of the steel fiber reinforced SCC is simulated by a computational fluid dynamics software, in which the volume of fluid method is used to track the free surface of concrete. On the basis of the velocity field of concrete obtained by the software, the motion of steel fibers is calculated by solving the rigid body dynamics equation. To validate the proposed method, a casting process of a concrete beam with steel fibers is simulated. The effectiveness of the numerical simulation is confirmed by a comparison with the experimental results. Meanwhile, the variation of fiber orientation during the flow of SCC is discussed by analyzing the fiber orientation factor. K E Y W O R D S

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Study of the distribution and orientation of fibers in SFRC specimens

Cited by 161 publications

References 4 publications

Distribution of steel fibres in rectangular sections

Distribution of steel fibres in rectangular sections

Evaluating steel fiber‐reinforced self‐consolidating concrete performance

Three‐dimensional modeling of the distribution and orientation of steel fibers during the flow of self‐compacting concrete

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