Membrane penetration effects on shear strength and volume change of soil during triaxial test

Alhani, Israa J.; Noor, Mohd Jamaludin Md; Albadri, Wael M.

doi:10.1063/1.5062634

Cited by 6 publications

(3 citation statements)

References 36 publications

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“…Along similar lines, the total shear strength parameters (i.e., c u and ϕ u = 0) that are determined from UU tests are also influenced. In addition, the influence of the type and the thickness of the rubber membrane can influence the triaxial test results [11,12].…”

Section: Introductionmentioning

confidence: 99%

Determination of the Shear Strength of Unsaturated Loess Samples from Conventional Triaxial Shear Tests Applying Rubber Membrane Correction

He,

Zhou,

Vanapalli

et al. 2024

Sustainability

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The shear strength parameters of loess samples are determined from conventional triaxial shear test results and used in the rational design of sustainable geotechnical infrastructures. However, the rubber membrane that is used in the triaxial shear apparatus for applying the all-around pressure to the test specimen has a significant influence on the measured shear strength parameters. In this paper, remolded and undisturbed unsaturated loess samples from northwest China are used in a comprehensive testing program to determine the shear strength from triaxial tests and understand the influence of a rubber membrane. The results show that the measured undrained cohesion from unconsolidated undrained triaxial tests on unsaturated soil specimens with and without a rubber membrane are significantly different. In this study, differences in the shear strength with and without a rubber membrane are assessed from shear strength index values that can be determined from undrained cohesion and the internal friction angle derived from conventional triaxial tests. Experimental results suggest that predominant changes arise mainly in the undrained cohesion values. The change rate of shear strength indices values of undisturbed loess shows a strong correlation with its water content; however, it is weak for remolded loess. The correlation coefficient between error and measured values of all shear strength indices is more than 0.8. Empirical correction relationships for triaxial shear tests with a rubber membrane for three different types of loess were established from the investigations. The simple approach used in this study can be used as a reference to apply corrections to the measured undrained cohesion values of unsaturated loess samples from northwest China.

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Section: Introductionmentioning

confidence: 99%

Determination of the Shear Strength of Unsaturated Loess Samples from Conventional Triaxial Shear Tests Applying Rubber Membrane Correction

He,

Zhou,

Vanapalli

et al. 2024

Sustainability

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“…The membrane penetration effect during triaxial test on granitic residual soil is normally neglected due to a tedious procedure required [7] The soil consists of significant amount of granular particles. A recent study by Alheni et al [7] showed that more than 60% of the total volume change in granular soil is contributed by the volume of membrane penetration during consolidation stage. The membrane penetration depends on various factors such as an effective confining pressure, mean grain size, density of the soil and thickness of rubber membrane.…”

Section: Introductionmentioning

confidence: 99%

Determination of non-linear shear strength and volume changes on remolded granitic residual soil due to membrane penetration

Osman

Albar

Nyuin

2023

IOP Conf. Ser.: Earth Environ. Sci.

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Membrane penetration is the term used to describe the displacement of the rubber membrane into the spaces between the cylindrical specimens during triaxial testing in the consolidation stage. Membrane penetration from elevated cell pressure during the consolidation stage might have a negative effect on the interpretation of stress-strain data and specimen volume calculations during the shearing stage. To assist engineers in making knowledgeable judgments, additional study is needed to examine membrane penetration in granitic residual soil. In this study, membrane penetration was investigated using a modified graphical technique. Triaxial tests on grade V granitic residual soil were conducted as part of the study at effective confining pressures of 50 kPa, 100 kPa, 200 kPa, 300 kPa, and 400 kPa. In the tests, real specimens constructed of compacted granitic residual soil with initial diameters of 50mm and 100mm, and dummy specimens made of a thin soil layer containing a solid, rigid cylindrical core, were both employed. Without considering the impact of specimen compression, the behaviour of membrane penetration was only examined in the dummy specimens. The graphical method has to be altered as a result of the fines. The findings demonstrated that the effect of membrane penetration increased with a rise in effective confining pressure and became less relevant at confining pressures of 300 kPa or lower.

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“…The gradation of aggregate plays a vital role in providing the required particlesinterlocking and determining the packing order of the particles. It also affects the shear strength, stiffness, load-carrying capacity and the permanent deformation characteristics [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Effect of Particle Breakage on Strength Characteristics of Limestone Aggregate

Alhani¹,

Albadri

Noor

et al. 2022

Geotech Geol Eng

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Particle breakage is one of the issues that significantly affect the strength characteristics of aggregate. In this paper, the strength of pre-crushed limestone aggregate was evaluated through investigating the friction angle, stress-strain behaviour, and single-particle strength. The particle breakage phenomenon was studied for samples prepared at different conditions, including non-soaked samples, water-soaked samples, and acidsoaked samples. The purpose of preparing the samples at different conditions was to simulate the effect of environmental factors on the breakage behaviour of limestone aggregate. The test program of this paper consists of two phases of triaxial tests: the initial shearing and second shearing. The test results showed remarkable variations among the samples since limestone aggregate tended to experience more particle breakage after being soaked in water and acid solution. Also, the volume change results exhibited an increase in dilation as the breakage index increases. The test results of this study presented the importance of considering the role of environmental factors in evaluating the particle breakage of limestone aggregate.

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Membrane penetration effects on shear strength and volume change of soil during triaxial test

Cited by 6 publications

References 36 publications

Determination of the Shear Strength of Unsaturated Loess Samples from Conventional Triaxial Shear Tests Applying Rubber Membrane Correction

Determination of the Shear Strength of Unsaturated Loess Samples from Conventional Triaxial Shear Tests Applying Rubber Membrane Correction

Determination of non-linear shear strength and volume changes on remolded granitic residual soil due to membrane penetration

Effect of Particle Breakage on Strength Characteristics of Limestone Aggregate

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