Contribution of Particles Size Ranges to Sand Friction

Kara, Esma Mostefa; Meghachou, Mourad; Abou-Bekr, Nabil

doi:10.48084/etasr.361

Cited by 30 publications

(7 citation statements)

References 12 publications

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“…The results show that the peak shear strength increases as particle size increases. Similar results were obtained by Kara et al [23], Alias et al [24]. In high normal stress of 1000 kPa, natural, medium and fine Kenadsa sand have globally, the same behaviour.…”

Section: Kenadsa Sandsupporting

confidence: 89%

“…In the results obtained by Kara et al [23], it is noted that there is an increase in peak friction angle with the increase of particles size (Figure 20.). They concluded that if we know the size of particles of marine sand we can deduce directly the value of peak friction angle.…”

Section: Figure 20 Comparison Between Peak Friction Anglesmentioning

confidence: 76%

“…Three sets of loading (0.05, 0.10 and 0.15 kN) were selected for each of eight particle sizes. Eighteen samples referred to above (one of actual Tergha sand (Algeria), seven samples with different particle size ranges and ten reconstituted samples with random percentages of particle size ranges) loading under five normal stresses (100, 200,300,400 and 600 kPa) were analysed by Kara et al [23]. Granular materials from Nilai quarry (Malaysia) were divided into two groups: particles passing the sieves with an opening size of 2.36 mm and particles passing the standard 20 mm sieves loading under 100, 200 and 300 kPa were analysed by Alias et al [24].…”

Section: Comparative Studymentioning

confidence: 99%

“…The results demonstrate that the friction angle is increasing with increasing of the median particle diameter. Kara et al [23] concluded that peak friction angle increases when the size of particles increases. Grains size does not have a significant influence on internal friction angle.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Grain Size and Distribution on Mechanical Behavior of Dune Sand

Boudia

Berga

2021

Civ Eng J

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Sand is a major component of soils. It is widely used in manufacturing and construction. In geomechanics, one characterizes sand according to various aims. This paper investigates, for local sands, the effect of grain size and granular distribution on the mechanical behavior in terms of strength and stress-strain relationship. For this purpose, dune sands of the great Occidental Erg, from Algeria, are analyzed, according to the Mohr-Coulomb criterion. The study uses three kinds of sands. Every kind is divided into three sizes classes. Then, the experimental program conducts a set of direct shear tests, under various vertical stresses, using the small shear box (60 × 60 mm). The results show that the particle size and distribution have a direct effect on the mechanical behavior of the dune sand. Then, the dominant size class governs the natural sand behavior. Moreover, the peak shear strength increases as particle size increases. This indicates that there is an increase in peak friction angle with the increase of particles size and the sands consider as a purely cohesionless material. In addition, the experimental analysis shows that density and confinement stress is not sufficient to interpret the mechanical behavior. Indeed, mineralogy and surface state can influence the shear strength. These conclusions lead to the relevance of the sand genesis and the importance of the local materials thematic. Doi: 10.28991/cej-2021-03091730 Full Text: PDF

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Section: Kenadsa Sandsupporting

confidence: 89%

Section: Figure 20 Comparison Between Peak Friction Anglesmentioning

confidence: 76%

Section: Comparative Studymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of Grain Size and Distribution on Mechanical Behavior of Dune Sand

Boudia

Berga

2021

Civ Eng J

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“…Additionally, according to references [14] and [15], it was concluded that a higher ratio of curvature coefficient to uniformity coefficient (Cc/Cu) results in lower cohesion and internal angle of friction, and the larger the particle size, the higher the internal angle of friction. In contrast, the sand has no cohesion and hardly become denser.…”

Section: Sieve Analysismentioning

confidence: 99%

Characteristics of Sand-Waste Tyre Rubber Composite as Backfill Material

Siti Nur Fathiha Abdul Jalil,

Nur Faezah Yahya,

Chan Chee Ming

et al. 2024

ARAM

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Waste tyre rubber offers an alternative to natural sand as a backfill material, potentially reducing the dependency on natural sand usage in construction. The purpose of this study is to investigate the properties of waste rubber as a potential backfill material for retaining walls and to assess the shear strength characteristics of the sand-rubber composite when used as a backfill for retaining walls, ultimately identifying the optimal sand-rubber composite ratio for effective backfill application. This study employed sieve analysis and specific gravity testing to identify the physical attributes of waste tyre rubber. Subsequently, direct shear box tests were conducted utilizing ratios of 100%, 50%, 75%, and 25%. Two types of rubber were utilized in this study Granulated Rubber (GR) with particle sizes ranging from 1 to 5 mm, and Mulch (MR) with particle sizes exceeding 25 mm. The findings reveal that the Cu value for waste rubber is less than 2.50 and the Gs value is less than 1.5, indicating favourable characteristics. Moreover, the 25% GR and MR compositions exhibit the highest shear stress values at 0.0347 N/m² and 0.0296 N/m², respectively. In conclusion, it has been determined that the optimal proportion of waste rubber for the application of the sand-waste tyre rubber composite as a backfill material is 25%.

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How strong are salt marshes? Geotechnical properties of coastal wetland soils

Brooks

Moeller

Spencer

et al. 2022

Earth Surf Processes Landf

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Salt marshes are globally distributed, vegetated intertidal wetlands and marsh edge erosion is common on many shores. To understand how and why marsh edge erosion occurs, the response of salt marsh substrates to applied shear and vertical stress must first be quantified. This response is likely influenced by marsh substrate biological, geochemical and sedimentological composition. However, currently there is little systematic research into the between‐marsh variability in these properties and how they affect both marsh edge erosion processes and the ability of a marsh to maintain its position vertically within the tidal frame. This paper compares two marshes of contrasting sedimentology at Tillingham marsh, East England and Warton marsh, Northwest England. Soil shear strength and compressibility are determined by applying geotechnical methods to determine marsh resistance to shear and vertical effective stresses. This research was able to isolate the influence of roots on substrate shear strength in a three‐dimensional sample. In response to vertical effective stress, both the expected displacement magnitude and the vertical recovery potential of a marsh substrate are affected by past stress conditions on the marsh, particularly those resulting from desiccation. The substrate response to vertical effective stress also influences substrate shear strength through the effect of consolidation on the void ratio (or bulk density). We present evidence for the connection between marsh composition and substrate behaviour under applied stress. The results shed light on potential determinants of marsh resistance to edge erosion, which is ultimately essential for the informed implementation of both nature‐based coastal flood defences and coastal restoration schemes.

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Contribution of Particles Size Ranges to Sand Friction

Cited by 30 publications

References 12 publications

Effect of Grain Size and Distribution on Mechanical Behavior of Dune Sand

Effect of Grain Size and Distribution on Mechanical Behavior of Dune Sand

Characteristics of Sand-Waste Tyre Rubber Composite as Backfill Material

How strong are salt marshes? Geotechnical properties of coastal wetland soils

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