Laboratory investigation on the behaviour of an overconsolidated expansive clay in intact and compacted states

Khemissa, Mohamed; Mekki, Lakhdar; Mahamedi, Abdelkrim

doi:10.1016/j.trgeo.2017.12.003

Cited by 12 publications

(4 citation statements)

References 18 publications

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“…This behavior is related to the swelling nature of the studied clay. Similar observation was stated by many researchers [38][39][40][41] . Fig.…”

Section: Void Ratio-time Relationshipsupporting

confidence: 91%

“…Furthermore, all the tests performed at various temperatures showed an increase in the swelling index upon mechanical stress release when greater vertical stresses were reached. This behavior is commonly associated with the swelling nature of the clay [38][39][40][41] . Mohajerani et al 43 and Crisci et al 44 related the observed swelling index increase to the mechanical degradation of the material when subjected to high stresses and to various loading and unloading cycles.…”

Section: Temperature Effect On the Soil Compressibilitymentioning

confidence: 99%

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Influence of effective stress and temperature on the creep behavior of a saturated compacted clayey soil

Kaddouri

Cuisinier

Masrouri

2019

Geomechanics for Energy and the Environment

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The compacted clay barrier of shallow depth repositories for wastes would be subjected to temperature variations. Consequently, the hydro-mechanical properties of compacted clays could be progressively modified, and thus affect the performance of repositories. The influence of effective stress and temperature on the creep behavior of a saturated compacted clayey soil was experimentally investigated by performing a series of incremental loading creep tests using a temperature-controlled oedometer. Applied effective vertical stress varied from 10 to 1300 kPa within a large temperature range of 5°C to 70°C. The results showed that the compression and swelling indices appear not to be affected by temperature, whereas the yield stress decreases as the temperature increases. The secondary compression is time-dependent; creep strains decrease with time till reaching a stable value corresponding to a period of 10 days. The creep coefficient Cαe increases with the increase of the effective stress and temperature. Moreover, relationships between the creep coefficient Cαe, incremental compression index C * c, effective stress and temperature were further analyzed. A linear relationship between Cαe and C * c was observed in the considered stress range and the (Cαe/C * c) ratio appears to be temperature dependent. Finally, the main results were discussed and interpreted in the light of a suitable constitutive framework.

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“…This behavior is related to the swelling nature of the studied clay. Similar observation was stated by many researchers [38][39][40][41] . Fig.…”

Section: Void Ratio-time Relationshipsupporting

confidence: 91%

Section: Temperature Effect On the Soil Compressibilitymentioning

confidence: 99%

Influence of effective stress and temperature on the creep behavior of a saturated compacted clayey soil

Kaddouri

Cuisinier

Masrouri

2019

Geomechanics for Energy and the Environment

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“…Different types of fill and the selection of the appropriate laboratory maximum dry density for each fill type has been discussed by Al-Badran and Tom (2014) [16]. A comparison of the undisturbed and refilled clays' strength characteristics has been appraised by Khemissa et al (2018) [17]. Soil Classification has also been correlated with permeability, MDD, and OMC [18].…”

Section: Literature Reviewmentioning

confidence: 99%

Appraisal of Bearing Capacity and Modulus of Subgrade Reaction of Refilled Soils

Arshid

Kamal

2020

Civ Eng J

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Soil is remoulded, replaced, or improved in place to meet the required engineering properties. Relative compaction is the measure of the resulting engineering improvement. But design engineers need the allowable bearing capacity while the modulus of subgrade reaction is the primary input of modern foundation design software. The current research appraised a correlation between Relative Compaction ( ), Moisture Content ( ), and allowable bearing capacity ( ) and another correlation between , RC, MC, and modulus of subgrade reaction ( ). The test samples were extracted from each trial of the standard proctor test using purpose-built extraction tubes. Allowable bearing capacity has been determined by performing unconfined compression tests on the extracted tubes. The relationships have been established employing statistical analysis. It was noticed that soil samples at the lower moisture content (6-9%) show brittle failure before reaching the allowable strain. The soil samples having a moisture content of 10-14% exhibited shear failure, nearly simultaneous to the allowable strain. The soil samples having higher moisture content undergone a strain of 15% without showing the shear failure. A simple equation has also been appraised to determined Ks involving the three-input variable, i.e., , , and . Moderate correlations have been found to exist between the studied parameters, owing to some other variables' influence. Recommendations for future studies have been drawn to quantify the effect of identified parameters. Doi: 10.28991/cej-2020-03091606 Full Text: PDF

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“…Civil engineering infrastructures are commonly constructed on weak soils that require improvement to resist applied loads [27,31,38,48]. Improving soils in a time-efficient and cost-effective manner can not only ensure a safer, more reliable, efficient, sustainable, and resilient infrastructure but also offer great value to investors, contractors, and users [1,4,47,34].…”

Section: Introductionmentioning

confidence: 99%

A practical consolidation solution based on the time-dependent discharge rate around PVDs

Sun

et al. 2019

Transportation Geotechnics

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Laboratory investigation on the behaviour of an overconsolidated expansive clay in intact and compacted states

Cited by 12 publications

References 18 publications

Influence of effective stress and temperature on the creep behavior of a saturated compacted clayey soil

Influence of effective stress and temperature on the creep behavior of a saturated compacted clayey soil

Appraisal of Bearing Capacity and Modulus of Subgrade Reaction of Refilled Soils

A practical consolidation solution based on the time-dependent discharge rate around PVDs

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