An Experimental Study on Shear Strength Behavior of Soils Under Low Confining Pressure

Balaban, Eren; Smejda, Ales; Onur, Mehmet İ̇nanç

doi:10.11159/icgre19.110

Cited by 8 publications

(7 citation statements)

References 21 publications

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“…Very few results are available in the literature on direct shear tests performed on reconstituted sand-clay mixtures in the laboratory [39,42,50,60,73,175,176]. Furthermore, the results do not provide a comprehensive understanding on the mechanical behavior of the sand-clay mixtures even though they clearly indicate that the clay content affects the shear behavior of the mixtures.…”

Section: Interface Direct Shear Tests On Sand-clay Mixturementioning

confidence: 98%

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A Review of Sand–Clay Mixture and Soil–Structure Interface Direct Shear Test

et al. 2021

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Natural soils are usually heterogeneous and characterized with complex microstructures. Sand–clay mixtures are often used as simplified soils to investigate the mechanical properties of soils with various compositions (from clayey to sandy soils) in the laboratory. Performing laboratory tests on a sand–clay mixture with definite clay fraction can provide information to understand the simplified soils’ mechanical behavior and better predict natural soils’ behavior at the engineering scale. This paper reviews previous investigations on sand–clay mixture and soil–structure interface direct shear test. It finds that even though there are many investigations on sand–clay mixtures and soil–structure interfaces that consider pure sand or pure clay, limited data on the mechanical behavior of the interface between sand–clay mixture and structure materials are available. Knowledge is missing on how the clay content influences the mechanical behavior of interface and how the soil particles’ arrangement changes as the clay content increases. Further study should be performed to investigate the interface in terms of a reconstituted sand–clay mixture and structure by interface direct shear test, to highlight the influence of clay fraction on the interface response, under various loading conditions.

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Section: Interface Direct Shear Tests On Sand-clay Mixturementioning

confidence: 98%

“…The direct shear test is of significant importance to study the mechanical response of sand-clay mixture [39,42,60,73]. Direct shear tests were performed on the mixture of dry Ottawa sand and kaolinite clay by Vallejo and Mawby [42] to determine how the shear strength is influenced by the sand (or clay) fractions.…”

Section: • Direct Shear Testsmentioning

confidence: 99%

A Review of Sand–Clay Mixture and Soil–Structure Interface Direct Shear Test

et al. 2021

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“…Few recent studies are found to investigate the physical and mechanical properties of sand with fines. The fines content improves dry density, shear strength, and reduce angle of internal friction (ϕ) up to a threshold of fines content [14,19,20]. The internal friction angle decreases with increase in fine content and cohesion increases [6,19,21,22].…”

Section: Introductionmentioning

confidence: 99%

“…The fines content improves dry density, shear strength, and reduce angle of internal friction (ϕ) up to a threshold of fines content [14,19,20]. The internal friction angle decreases with increase in fine content and cohesion increases [6,19,21,22]. The undrained shear strength, soil modulus, and pore pressure decreased when the clay content increased [23].…”

Section: Introductionmentioning

confidence: 99%

A Disaster Resilient Road: Effects of Fines on Density and Shear Strength of Sands

Shahin¹,

Khan²,

Bari³

2020

IJTET

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During a massive flood or earthquake, the roads are mainly damaged due to the looseness of the subgrades. In recent times for any new constructions of roads and embankments the subgrades mainly constructed with the sand filling. It is difficult to achieve the desired degree of compaction beyond a certain limit. That's why the bases (subgrades) become loose. This study aims to overcome the situation by increasing compaction and shear strength properties of sand filling. In this paper, an intensive laboratory investigation of fines with sands is investigated by a series of the proctor test and direct shear test. In this study, fines were mixed with the sand samples in a proportion of 10%, 20%, 30%, 45% and 55% to examine the effect on maximum dry density. Tests indicated that 45 to 55% fines with sands having different Fineness Modulus (FM), the Maximum Dry Density (MDD) of the sand can be increased up to 18 to 26% depending on FM. The results revealed that the density and shear strength (cohesion) of sand both increase significantly with the addition of fines with it up to a certain percentage. This increment in MDD and shear strength makes the bases (subgrades) stronger and stable. This result can be used in disaster resilient road or embankment construction and also for the structures having a shallow foundation.

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“…Soils are found in composite form due to their formation process. Mechanical behaviour of soil such as shear strength, compressibility, erodibility, permeability are dependent on composition of soil [2]. Many investigations were conducted to acquire a comprehensive insight on the behaviour of soil mixtures [1][2] [3][4] [11] [14].…”

mentioning

confidence: 99%

An experimental study on the effect of particle size and non-homogeneity on the shear strength of soil

Shabong,

Sonowal,

Pukhrambam

et al. 2023

IOP Conf. Ser.: Mater. Sci. Eng.

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Soil deposits available in nature are often present as homogeneous mixtures of particles of different sizes and base minerals or as a combination of soils in different layers forming a non-homogeneous configuration. This variability in soil has great influence on the shear strength behaviour. In this study, different naturally occurring soil particle sizes and shapes (angular and flaky) have been utilized as reinforcements in the form of layers to determine their influence on the soil shear strength. Therefore, triaxial tests have been conducted on homogeneous sand (where particles are mixed proportionately), and on non-homogeneous sand (different layer combinations of different particle sizes as well as the inclusion of angular and flaky particles). It has been observed that there was a substantial increase in the shear strength for non-homogeneous arrangement compared to homogeneous sand sample. Furthermore, the addition of flaky particles from 10% to 30% by weight of fine grained sand increased the angle of internal friction (ϕ) and cohesion (c) values thereby increasing the shear strength. However, for angular-fine sand layer combination, the addition of 10-20% of angular particles by weight shows a significant increase in shear strength in comparison to 30-100% of angular particles.

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An Experimental Study on Shear Strength Behavior of Soils Under Low Confining Pressure

Cited by 8 publications

References 21 publications

A Review of Sand–Clay Mixture and Soil–Structure Interface Direct Shear Test

A Review of Sand–Clay Mixture and Soil–Structure Interface Direct Shear Test

A Disaster Resilient Road: Effects of Fines on Density and Shear Strength of Sands

An experimental study on the effect of particle size and non-homogeneity on the shear strength of soil

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