Fall cone tests on clay–sand mixtures

Çabalar, Ali Fırat; Mustafa, Waleed Sulaiman

doi:10.1016/j.enggeo.2015.04.009

Cited by 65 publications

(18 citation statements)

References 30 publications

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“…In addition, the particle size and shape of soil mixture have a significant effect on the strength and deformation properties of soil matrix (Clayton et al 2004;Santamarina and Cho 2004;Abbireddy et al 2009;Cabalar 2010;Cabalar and Hasan 2013;Cabalar and Mustafa 2015). The confining pressure at lower values also affected the dilatancy of sands (Chakraborty and Salgado 2010).…”

Section: True Triaxial Compression Testmentioning

confidence: 94%

“…The amount of fines in the mixture could greatly influence the stress-dilatancy behaviors (Salgado et al 2000;Xiao et al 2014a) and strength behaviors (Chu and Leong 2002;Naeini and Baziar 2004;Ni et al 2004;Cabalar and Mustafa 2015). In addition, the particle size and shape of soil mixture have a significant effect on the strength and deformation properties of soil matrix (Clayton et al 2004;Santamarina and Cho 2004;Abbireddy et al 2009;Cabalar 2010;Cabalar and Hasan 2013;Cabalar and Mustafa 2015).…”

Section: True Triaxial Compression Testmentioning

confidence: 96%

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Stress–dilatancy behaviors of coarse granular soils in three-dimensional stress space

Xiao

Liu

Sun

et al. 2015

Engineering Geology

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Section: True Triaxial Compression Testmentioning

confidence: 94%

Section: True Triaxial Compression Testmentioning

confidence: 96%

Stress–dilatancy behaviors of coarse granular soils in three-dimensional stress space

Xiao

Liu

Sun

et al. 2015

Engineering Geology

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“…However, the testing results described here have not been conducted on the clean sands, rather the results have been obtained on the sand-clay mixtures, which are thought of as a composite matrix of finer and coarser soil grains. Therefore, in the light of the numerous investigations [44,47], analyzing the test results on sand-clay mixtures becomes more versatile if the effects of sand and clay grains are studied separately. This separation appears to be important in describing the use of the intergranular void ratio (e s ) as an alternative parameter to define the undrained shear-strength behaviour of sand-clay mixtures rather than using traditional void ratio (e) values [23,48,49,50].…”

Section: Resultsmentioning

confidence: 99%

“…Similar to the observations made by Hardin and Kalinski [65], that the G max increases with an increase in the mean effective grain size, D 50 ( Figure 8). In addition, the amount of cohesionless material in the mixtures has an obvious influence on the overall behaviour as well as the G max of such mixtures [44,45,47,66,67] (Figure 9). The evaluated G max values for the mixtures have been almost doubled when the clay is mixed with 50%sand addition for any size and shape.…”

Section: Resultsmentioning

confidence: 99%

Shear modules of claysand mixtures using bender element test

Çabalar¹,

Khalaf²,

Karabash³

2018

ActaGeotechSlov

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Bender-element (BE) tests were conducted on clay-sand mixtures to investigate the variation of small strain-shear modulus (G max) with the sand content and the physical characteristics (size, shape) of the sand grains in the mixtures. Three different gradations (0.6-0.3 mm, 1.0-0.6 mm and 2.0-1.0 mm) of sands having distinct shapes (rounded, angular) were added to a low-plasticity clay with mixture ratios of 0% (clean clay), 10%, 20%, 30%, 40%, and 50%. For the purposes of performing a correlation analysis, unconfined compression (UC) tests were also carried out on the same specimens. The tests indicated that both the G max and unconfined compressive strength (q u) values of the specimens with angular sand grains were measured to be lower than those with rounded sand grains, for all sizes and percentages. As the percentage of sand in the mixture increases, the G max values increase, while the q u values decrease. The results further suggested that the G max values decrease as the q u values decreases as the size of the sand grains reduces.

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“…The properties of these soils, which are called as intermediate soils, vary because of the density and mixture content. Difficulties arise in understanding their stress-strain behaviour, compression mechanism, and liquefaction potential [1][2][3][4][5][6][7][8][9][10][11]. For example, Vallejo and Mawby [12] reported that shear strength of the clay-sand mixtures is fully controlled by the sand below 25% of fines content.…”

Section: Introductionmentioning

confidence: 99%

Influence of grain shape and gradation on the shear behavior of sand mixtures

Çabalar

2017

Scientia Iranica

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In this paper, triaxial and cyclic direct shear behaviour of different sand mixtures were investigated by considering variations of shape, size and mixture content. In most studies, investigations on stress-strain properties of soils are carried out using clean sands. However, granular soils in the field may contain a considerable amount of grains in different physical characteristics (i.e., shape, size). Therefore, behaviour of the various sand mixtures in triaxial compression and cyclic direct shear testing apparatuses has received attention in this study.Two different sizes (0.25 mm-0.5 mm, and 1.0 mm-2.0 mm) of sands with distinct shapes (rounded and angular) were tested in triaxial and cyclic direct shear apparatuses. The mixtures of coarser and finer geomaterials were tested in various mix ratio values from 5% to 50% by weight. Based on the examinations during shearing of these materials, it was observed that behavior of the sand mixtures are closely related to the grain shape of host materials as well as fines content in both testing apparatuses, whilst size of the sands was not found to be significantly effective on the results.

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Fall cone tests on clay–sand mixtures

Cited by 65 publications

References 30 publications

Stress–dilatancy behaviors of coarse granular soils in three-dimensional stress space

Stress–dilatancy behaviors of coarse granular soils in three-dimensional stress space

Shear modules of claysand mixtures using bender element test

Influence of grain shape and gradation on the shear behavior of sand mixtures

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