The geotechnical evaluation of sandstone–claystone alternations based on geological strength index

Özbek, Ahmet; Gül, Murat

doi:10.1007/s12517-014-1541-5

Cited by 8 publications

(2 citation statements)

References 17 publications

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“…Claystone is a material usually avoided and discarded due to its unfavourable behaviour and the existence of its layers considered to be a problem in construction work have been reported in some publications [1][2][3][4][5]. The use of this material has, however, been widely recommended, especially as a barrier to hazardous waste and this requires mixing it with bentonite to improve its hydro-mechanical properties [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

The application of vapour equilibrium technique to control suction to study the shrinkage and water retention of compacted Claystone-Bentonite mixtures

Arifin

Arsyad

Afdi

et al. 2022

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

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Understanding soil shrinkage and retaining water is essential for learning more about the possibility of cracking of liner. Moreover, the factors that influence it are also important to know to improve the material tested as hazardous waste liners. The vapour equilibrium technique is widely used to control suction of compacted soils experiencing drying-wetting phenomena. It is considered to be inexpensive, simple, and has the ability to adequately control the suction applied to soil samples. This paper, therefore, describes its application in studying the shrinkage and water retention in compacted claystone-bentonite mixtures. This involved using five saturated salt solutions including potassium sulphate (K2SO4), potassium chloride (KCl), sodium chloride (NaCl), potassium carbonate (K2CO3), and magnesium chloride (MgCl2.6H2O). The sample was allowed to be in equilibrium with the relative humidity salt solution and a calliper was used to measure the dimensions every day up to when this was achieved. The results showed the bentonite in the mixture affects the amount of shrinkage and water retention while the sample’s initial moisture content was also found to be very influential on the magnitude of the primary and residual shrinkage. Moreover, the sample’s ability to hold water was almost the same without differentiating the initial water content at a total suction of more than 41084.91 kPa.

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Section: Introductionmentioning

confidence: 99%

The application of vapour equilibrium technique to control suction to study the shrinkage and water retention of compacted Claystone-Bentonite mixtures

Arifin

Arsyad

Afdi

et al. 2022

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

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“…Claystone is found in large quantities during excavation and tunnel projects. This material is usually discarded because of its unfavorable properties when interacting with water [24][25][26][27][28]. Claystone layers are also often believed to be the source of failures in civil constructions.…”

Section: Introductionmentioning

confidence: 99%

The Permeability and Shear Strength of Compacted Claystone–bentonite Mixtures

Arifin¹,

Arsyad²,

Pangestu³

et al. 2021

GEOMATE

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A compacted claystone-bentonite mixture is proposed for use as a clay barrier. This research, in turn, focuses on the effects of bentonite mix on the permeability and shear strength of compacted claystonebentonite mixtures. The claystone used was obtained from the Banjarbakula landfill project, approximately 10 km from Banjarbaru, the South Kalimantan Government's Administrative Center, Indonesia. The bentonite used is commercially sold in Indonesia. The claystone was mixed with bentonite at a percentage of 5%, 10%, 15%, and 20% bentonite by dry-weight bases. The mixtures were compacted at a moisture content of 10%, 15%, and 20% to reach the dry unit weight of 16kN/m 3 -19kN/m 3 . Permeability and unconfined compressive strength tests were performed in this study. The result showed that the permeability of mixtures decreases with increasing bentonite content. The addition of up to 20% bentonite to the mixture reduced the permeability by 4.5 times, as compared to the sample without bentonite. Moreover, the mixtures' shear strength indicated by compressive strength and cohesion increased by increasing the bentonite content to 15%. The maximum shear strength obtained was three times higher than without bentonite. The mixtures' permeability and shear strength were also significantly affected by the sample's density and moisture content. A percentage of 20% bentonite is recommended, considering the wide range of acceptability based on two criteria (i.e., permeability and shear strength).

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Estimating the Rock Mass Properties of Ultramafic Rocks in Central Greece Using the Triaxial Tests of Intact Rock and the Geological Strength Index

Diamantis

Migiros

2018

Geotech Geol Eng

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The geotechnical evaluation of sandstone–claystone alternations based on geological strength index

Cited by 8 publications

References 17 publications

The application of vapour equilibrium technique to control suction to study the shrinkage and water retention of compacted Claystone-Bentonite mixtures

The application of vapour equilibrium technique to control suction to study the shrinkage and water retention of compacted Claystone-Bentonite mixtures

The Permeability and Shear Strength of Compacted Claystone–bentonite Mixtures

Estimating the Rock Mass Properties of Ultramafic Rocks in Central Greece Using the Triaxial Tests of Intact Rock and the Geological Strength Index

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