Behaviour of Sand Reinforced with Fibres

Ibraim, Erdin; Fourmont, Stephane

doi:10.1007/978-1-4020-6146-2_60

Cited by 39 publications

(29 citation statements)

References 12 publications

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“…In other words, the addition of fibres interferes with the packing of the grains. This was also observed by Michalowski and Zhao (1996), Ibraim and Fourmont (2007), who attributed it to the greater resistance to compaction in the presence of the fibres, and by Dos Santos et al (2010).…”

Section: Phase Relations and Initial Specimen Densitysupporting

confidence: 61%

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A behavioural framework for fibre-reinforced gravel

et al. 2017

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The mechanical behaviour of granular materials is known to be influenced by the addition of fibres. However, most previous research has been carried out on materials with relatively small grains (sands), and its application to larger grains is not well documented. This paper reports an investigation into the mechanical behaviour of a fibre reinforced granular material having a relatively large grain size corresponding to 1/3 rd and 1/5 th scaled railway ballast. The investigation was carried out by means of triaxial tests incorporating a fullfield, image-based deformation measurement technique; this enabled detailed observations to be made of each triaxial test specimen during shearing. The test data demonstrate the benefits of random fibre reinforcement for aggregates having a relatively large grain size. Analysis taking into account the effect of fibre tension on the effective stresses experienced by the granular skeleton provides new insights into the mechanisms of reinforcement in larger sized granular materials.

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Section: Phase Relations and Initial Specimen Densitysupporting

confidence: 61%

“…Michalowski and Zhao, 1996;Ibraim and Fourmont, 2007), albeit for fibre reinforced sand rather than larger and more uniformly-graded aggregates like scaled ballast.…”

Section: Phase Relations and Initial Specimen Densitymentioning

confidence: 99%

A behavioural framework for fibre-reinforced gravel

et al. 2017

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“…An alternative method uses short, flexible fibres as tensile resisting elements, randomly distributed throughout the soil mass. The ability of fibre inclusions to improve the general soil behaviour has been demonstrated in several laboratory experimental studies [2-12, among others], which identified a multitude of factors that influence the mechanical behaviour of the fibrereinforced granular soils including stress level, granular soil type and density, fibre type and concentration [13][14][15][16][17][18][19][20][21][22]. Particulate analogues based on discrete element modelling (DEM), with parallel treatment of soil particles and fibres, have also been developed to understand how random distributed flexible fibres generate a bond within the soil and affect the kinematics of the particulate matrix [23,24].…”

Section: Introductionmentioning

confidence: 99%

3D fibre architecture of fibre-reinforced sand

et al. 2017

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The mechanical behaviour of fibre-reinforced sands is primarily governed by the three-dimensional fibre architecture within the sand matrix. In laboratory, the normal procedures for sample preparation of fibre-sand mixtures generally produce a distribution of fibre orientations with a preferential bedding orientation, generating strength anisotropy of the composite's response under loading. While demonstrating the potential application of X-ray tomography to the analysis of fibre-reinforced soils, this paper provides for the first time a direct experimental description of the three-dimensional architecture of the fibres induced by the laboratory sample fabrication method. Miniature fibre reinforced sand samples were produced using two widely used laboratory sample fabrication techniques: the moist tamping and the moist vibration. It is shown that both laboratory fabrication methods create anisotropic fibre orientation with preferential sub-horizontal directions. The fibre orientation distribution does not seem to be affected by the concentration of fibres, at least for the fibre concentrations considered in this study and, for both fabrication methods, the fibre orientation distribution appears to be axisymmetric with respect to the vertical axis of the sample. The X-ray analysis also demonstrates the presence of an increased porosity in the fibre vicinity, which confirms the assumption of the "stolen void ratio" effect adopted in previous constitutive modelling. A fibre orientation distribution function is tested

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“…e max and e min ) increases gradually with increasing V fr (Figure 3), indicating that the addition of fibres interferes with the packing of the particles. Ibraim and Fourmont (2007) reported a loss in dry density of the sand-fibre mixture and this was attributed to the greater resistance to compaction provided by the fibres. However, the behaviour of the constituents (i.e.…”

Section: Description Of Parametersmentioning

confidence: 99%