Gradient-based fibre detection method on 3D micro-CT tomographic image for defining fibre orientation bias in ultra-high-performance concrete

Miletić, Marta; Kumar, Lakshminarayanan Mohana; Arns, Ji‐Youn; Agarwal, Ankit; Foster, Stephen J.; Arns, Christoph H.; Perić, Dunja

doi:10.1016/j.cemconres.2019.105962

Cited by 51 publications

(15 citation statements)

References 36 publications

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“…computed the grey level co‐occurrence matrix (GLC Matrix) 23 . Miletić et al 24 . used the greyscale gradient of the images to track the surface of each fibre.…”

Section: Introductionmentioning

confidence: 99%

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Individual fibre separation in 3D fibrous materials imaged by X‐ray tomography

Depriester

Roscoat

Orgéas

et al. 2022

Journal of Microscopy

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Modelling the physical behaviour of fibrous materials still remains a great challenge because it requires to evaluate the inner structure of the different phases at the phase scale (fibre or matrix) and the at constituent scale (fibre). X-ray computed tomography (CT) imaging can help to characterize and to model these structures, since it allows separating the phases, based on the grey level of CT scans. However, once the fibrous phase has been isolated, automatically separating the fibres from each other is still very challenging. This work aims at proposing a method which allows separating the fibres and localizing the fibre-fibre contacts for various fibres geometries, that is: straight or woven fibres, with circular or non-circular cross sections, in a way that is independent of the fibres orientations. This method uses the local orientation of the structure formed by 220

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“…computed the grey level co‐occurrence matrix (GLC Matrix) 23 . Miletić et al 24 . used the greyscale gradient of the images to track the surface of each fibre.…”

Section: Introductionmentioning

confidence: 99%

“…Eberhardt and Clarke 21 used the chord lengths whereas Naouar et al 22 computed the grey level co-occurrence matrix (GLC Matrix). 23 Miletić et al 24 used the greyscale gradient of the images to track the surface of each fibre.…”

Section: Introductionmentioning

confidence: 99%

Individual fibre separation in 3D fibrous materials imaged by X‐ray tomography

Depriester

Roscoat

Orgéas

et al. 2022

Journal of Microscopy

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“…UHPC has a dense micro-structure, thus possessing unique merits such as high strength, high durability, and high crack resistance [ 1 ]. A number of studies have been conducted on enhancing or understanding the mechanical properties of UHPC [ 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 ]. Although UHPC has a number of advantages, widespread usage of UHPC has not been achieved and UHPC has only been used in structures for particular purposes (e.g., low-weight, large-span structures, fatigue strengthening of bridge decks, or durability upgrading of structures in harsh marine environments) [ 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 ] due to a lack of design codes [ 20 ].…”

Section: Introductionmentioning

confidence: 99%

Compressive Behavior of FRP Grid-Reinforced UHPC Tubular Columns

Zeng

Long

2021

Polymers

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In this study, a novel form of tubular columns that is made of ultra-high-performance concrete (UHPC) internally reinforced with fiber-reinforced polymer (FRP) grid (herein referred to as FRP grid-UHPCtubular column) was developed. The axial compression test results of FRP grid-UHPC tubular columns with and without in-filled concrete are presented and discussed. Effects of the number of the FRP grid-reinforcing cages, the presence of in-filled concrete, and the presence of external FRP confinement were investigated. The test results confirmed that the FRP-UHPC tubular columns have a satisfactory compressive strength, and the strength and ductility of FRP-confined concrete-filled FRP grid-UHPC tube columns are enhanced due to the confinement from the FRP wrap. The proposed FRP grid-reinforced UHPC composite tubes are attractive in structural applications as pipelines or permanent formworks for columns, as well as external jackets (can be prefabricated in the form of two halves of tubes) for strengthening deteriorated reinforced concrete columns.

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“…The most comprehensive method for characterising the distribution and orientation of fibres in a specimen is X-ray tomography [ 13 , 14 ]. However, due to its high cost and limitations in terms of the size of the specimen analysed (which depends on the capacity of the tomograph) it is not currently applicable on the industrial scale.…”

Section: Introductionmentioning

confidence: 99%

Key Factors for Implementing Magnetic NDT Method on Thin UHPFRC Bridge Elements

2021

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This paper provides an overview of the use of the magnetic NDT method for estimating the fibre content, and fibre orientation and efficiency factors in thin UHPFRC elements/layers, along any two orthogonal directions. These parameters are of utmost importance for predicting the post-cracking tensile strength in the directions of interest. After establishing meaningful correlations at the lab-specimen scale, this NDT method can be effectively implemented into quality control protocols at the industrial production scale. The current study critically addresses the influence of key factors associated with using this NDT method in practice and provides recommendations for its efficient implementation.

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Gradient-based fibre detection method on 3D micro-CT tomographic image for defining fibre orientation bias in ultra-high-performance concrete

Cited by 51 publications

References 36 publications

Individual fibre separation in 3D fibrous materials imaged by X‐ray tomography

Individual fibre separation in 3D fibrous materials imaged by X‐ray tomography

Compressive Behavior of FRP Grid-Reinforced UHPC Tubular Columns

Key Factors for Implementing Magnetic NDT Method on Thin UHPFRC Bridge Elements

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