Effective parameters for the particle breakage of calcareous sands: An experimental study

Shahnazari, Habib; Rezvani, Reza

doi:10.1016/j.enggeo.2013.03.005

Cited by 273 publications

(48 citation statements)

References 13 publications

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“…Particle breakage has a significant effect on soil behavior [22,36]. According to Hardin [22], grain crushing is affected by many factors, e.g., particle shape, state of effective stress, void ratio, particle hardness, and presence of water.…”

Section: Grain Crushing Effect With Surface Roughness In the Ring Shementioning

confidence: 99%

Effect of the Surface Roughness on the Shear Strength of Granular Materials in Ring Shear Tests

Jeong

Park

2019

Applied Sciences

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Surface roughness plays an important role in estimating the shear strength of granular materials. A series of ring shear tests with different surface roughnesses (i.e., smooth and rough surfaces) were performed. A large-sized ring shear device, which is applicable for fine- and coarse-grained sediments, was developed to examine the shear strength of large particle sizes (i.e., commercial gravels with a mean grain size of 6 mm). In terms of surface roughness, the drainage- and shear-velocity-dependent shear strengths of the granular materials were examined. In this study, different shear velocities of 0.1, 0.5, and 1 mm/s were applied under drained and undrained conditions. The test results clearly show that shear stress is affected by drainage, shear velocity, and surface roughness. In particular, a typical strain-hardening behavior is exhibited regardless of the drainage and shear velocity condition. The measured shear strength obtained from both drained and undrained conditions increased with increasing shear velocity. All tests showed a large fragmentation using rough surfaces compared to the smooth surfaces of the device. The grain crushing was significant during shearing, even when normal stress was not applied. For a given shear velocity, surface roughness is an important feature in determining the shear strength of granular materials.

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Section: Grain Crushing Effect With Surface Roughness In the Ring Shementioning

confidence: 99%

Effect of the Surface Roughness on the Shear Strength of Granular Materials in Ring Shear Tests

Jeong

Park

2019

Applied Sciences

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“…Grain crushing could greatly influence the mechanical behaviours of granular soils. The basic way to investigate the grain crushing behaviours of sands is through laboratory tests -for example, one-dimensional compression tests Luzzani & Coop, 2002;Daouadji & Hicher, 2010), conventional triaxial tests Ueng & Chen, 2000;Russell & Khalili, 2004;Daouadji & Hicher, 2010;Bandini & Coop, 2011;Shahnazari & Rezvani, 2013) and ring shearing tests (Coop et al, 2004). For coarse granular soils, an effective way to study particle-breakage behaviours is to conduct large-scale triaxial tests (Indraratna & Salim, 2002;Varadarajan et al, 2003Varadarajan et al, , 2006Indraratna et al, 2005;Gupta, 2009;Nimbalkar et al, 2012;Liu et al, 2014;Xiao et al, 2014;.…”

Section: Introductionmentioning

confidence: 99%

Fractal crushing of carbonate sands under impact loading

Liu

Xiao

et al. 2016

Géotechnique Letters

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Carbonate sands are widely used in coastal engineering for foundation and embankment. Impact loading could be encountered during driving piles or compacting foundations, which could lead to large grain crushing and changes in grain size distribution. Fractal grading and crushing of carbonate sands were investigated through impact loading tests. The fractal grading uplifted as grains crushed. The fractal dimension and mean diameter decreased with decreasing the specimen height or increasing the input work, while the grain crushing increased with decreasing the specimen height or increasing the input work. It was observed from the test results that the fractal grading of carbonate sand under impact loadings could be intrinsically pertaining to the grain crushing.ICE Publishing: all rights reserved NOTATION B p and B t breakage potential and total breakage, respectively B r relative breakage index (%) D 50 mean diameter (mm) d grain diameter (mm) d M maximum grain diameter (mm) d m minimum grain diameter (mm) e 0 initial void ratio F percentage finer (%) h 0 initial specimen height (mm) W input work (kJ) W v input work per volume (J/mm 3 ) α and β fractal dimensions β B 0 , χ B and α B material constants β D 0 , χ D and α D material constants β W 0 , χ W and α W material constants INTRODUCTIONCarbonate sands are widely used in the construction of coastal foundations. This sand is more crushable than quartz sand. Grain crushing could greatly influence the mechanical behaviours of granular soils. The basic way to investigate the grain crushing behaviours of sands is through laboratory tests -for example, one-dimensional compression tests (

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“…Initial studies focused on physical and geo-mechanical properties (Celestino and Mitchell 1983). In order to investigate the reasons for the particulate nature of calcareous sand, several studies focused on the particle breakage characteristic of this soil (Ngan-Tillard et al 2009;Zhang et al 2009;Shahnazari and Rezvani 2013). Moreover, investigations involving the bearing capacity and settlement of pile foundations were conducted to evaluate the engineering behavior of calcareous soil (Angemeer et al 1973;Ohno et al 1999;Tian et al 2010), and the design methodology of pile foundation in calcareous soil (Wess and Chamberlin 1971;Nauroy et al 1988; Alba and Audibert.…”

Section: Introductionmentioning

confidence: 99%

Shear characteristics of calcareous gravelly soil

Wang

Jin

et al. 2016

Bull Eng Geol Environ

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Because of its angularity, crushability, and high void ratio, calcareous gravelly soil has peculiar geotechnical properties. A series of large-scale direct laboratory shear tests was conducted on calcareous gravelly soil taken from coral reefs in the South China Sea. This study aimed to investigate the shear characteristics of calcareous gravelly soil under conditions of varying gradation, water content, density, and mineral composition. The experimental results revealed the extremely different mechanical properties of calcareous gravelly soil compared to common non-cohesive soil: calcareous gravelly soil has greater apparent cohesion, larger friction angle, and lower softening value than quartz sand. The friction angle increases with dry density, while the apparent cohesion increases with the median particle size (D 50 ) of the soil. After shear failure, the apparent cohesion decreases significantly from the peak value, but friction angle decreased slightly. Grouting can be employed to reinforce foundations and enhance slopes consisting of calcareous gravelly soil at the early stage of shear failure. This study intends to provide reference information for engineering constructions on coral reefs and report new findings on coarse-grained soil.

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Effective parameters for the particle breakage of calcareous sands: An experimental study

Cited by 273 publications

References 13 publications

Effect of the Surface Roughness on the Shear Strength of Granular Materials in Ring Shear Tests

Effect of the Surface Roughness on the Shear Strength of Granular Materials in Ring Shear Tests

Fractal crushing of carbonate sands under impact loading

Shear characteristics of calcareous gravelly soil

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