Volume Change Behavior of Two Compacted Clayey Soils under Hydraulic and Mechanical Loadings

Li, Zhong-Sen; Derfouf, Feth-Ellah Mounir; Benchouk, Assia; Abou-Bekr, Nabil; Taïbi, Saïd; Fleureau, Jean‐Marie

doi:10.1061/(asce)gt.1943-5606.0001851

Cited by 21 publications

(8 citation statements)

References 37 publications

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“…It can be concluded from these observations that identical increments of suction or mechanical stress produce the same change in void ratio (volume) as long as the material remains saturated. This joins the results of many authors such as: Benchouk et al, [4] Biarez et al, [7] Derfouf et al, [9] Li et al, [22] Lu et al [24] and Zerhouni. [42] .…”

Section: Behavior Characterization In the Saturated Domainsupporting

confidence: 86%

“…By comparing the results of mechanical consolidation and drying tests, some authors (e.g., Benchouk et al, [4] Biarez et al, [7] Fleureau et al, [11] Li. [21] and Li et al [22] ) found that the drying curve of saturated slurry was equivalent to an oedometric consolidation curve, provided that suction was smaller than the airentry value, that is, the soil remained quasi-saturated.…”

Section: Introductionmentioning

confidence: 99%

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Volumetric behavior of natural swelling soil on drying-wetting paths. Application to the Boumagueur marl -Algeria-

Mebarki

Kareche

Benyahia

et al. 2020

Studia Geotechnica Et Mechanica

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This article presents the results of experimental work carried out both in situ (coring; pressuremeter test) and in the laboratory (drying-wetting and oedometric tests) to describe the volumetric behavior on drying-wetting path of a swelling clayey soil of eastern Algeria. In order to perform drying-wetting tests the osmotic technique and saturated salts solutions were used. These suction-imposed methods have gained widespread acceptance as reliable methods for imposing suction on soil specimens. They allowed to sweep a wide range of suctions between 0 and 500 MPa. The ability to impose suction on soil specimens allows for drying and wetting stress paths to be applied to evaluate resulting changes in state parameters (void ratio, degree of saturation and water content). These paths were carried out on specimens with different initial states. Slurries of soil were used to characterize the reference behavior, while the undisturbed soil samples allow to describe the behavior of material under in situ conditions. In the last part of this article and to specify the behavior observed in the saturated domain, a comparison between the resulting deformations of the drying-wetting test and those resulting from the oedometric test was made.

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Section: Behavior Characterization In the Saturated Domainsupporting

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Volumetric behavior of natural swelling soil on drying-wetting paths. Application to the Boumagueur marl -Algeria-

Mebarki

Kareche

Benyahia

et al. 2020

Studia Geotechnica Et Mechanica

Self Cite

View full text Add to dashboard Cite

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“…was determined by weighing after oven-drying at 105˚C for 48 hours [4]. The values of the coefficients of Equations (1)-(2) are given in Table 3 and Because we aim to predict the hydromechanical behavior of these soils compacted at low water content behavior, the concept of residual water content is meaningless and we assume 0 r w = in Equations (1) and (2). Globally, a good agreement between experimental and predicted data is achieved with the two models.…”

Section: Soil Water Characteristic Curvesmentioning

confidence: 99%

“…Therefore, since the early 1990s, the mechanics of unsaturated soils has been the subject of much research. Indeed, applications related to soil unsaturation affect practically all branches of geotechnics: volume variations due to shrinkage-swelling, environmental geotechnics, compacted structures such as road embankments and earth dams [2].…”

Section: Introductionmentioning

confidence: 99%

Hydromechanical Behavior of Low-Swelling Soils Compacted at Low Water Content: Laboratory Study

Gandema¹,

Kébré²,

Naon³

2020

ENG

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Fine unsaturated soils are used in many applications, particularly in road infrastructure and in construction. These materials undergo deformations according to the stresses to which they are subjected. The purpose of this paper is to study the influence of hydromechanical stresses on the behavior of low swelling soils compacted at low water content in accordance with the French standard GTR 92 (Guide des Terrassements Routiers). Then, various experimental tests on an oedometer were carried out in the laboratory. Two types of low swelling soil sampled in Nasso on the outskirts of the town of Bobo Dioulasso (Burkina Faso) were used. After shuffling, each sample was moistened to its optimum water content and then compacted to 90% and 95% of its optimum density. Behavior tests show that these soils deform very little when subjected to hydromechanical stresses. However, these deformations are swelling in nature for low mechanical stresses and when the stresses are high, they tend to collapse. When these soils are subjected to a vertical stress of 420 kPa, the primary consolidation time is of the order of one minute for NH 2 (a silty soil) and about ten minutes for NH 3 (a silty-clayed soil).

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“…e following studies have been carried out using the MIP technique. (i) e PSD was measured after each suction or water content increment to investigate the microstructural evolution during wetting or drying; such studies focused on clayey soils [12][13][14]. Environmental scanning electron microscope (ESEM) was also used for this purpose.…”

Section: Introductionmentioning

confidence: 99%

Pore‐Size Distribution Evolution of Intact, Compacted, and Saturated Loess from China during Consolidation and Shearing

Shao

Xiao

et al. 2021

Advances in Civil Engineering

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To examine the pore-size distribution (PSD) evolution of intact, compacted, and saturated loess during deformation associated with consolidation or shearing, nominally identical specimens were consolidated to different confining stresses or sheared to sequential axial strains under the same confining stress, and the PSD of each deformed specimen was characterized using the Mercury intrusion porosimetry (MIP) technique. The results show that the PSD evolution during consolidation is similar to that during shearing, suggesting that the PSD evolution depends mainly on whether the soil volume contracts or expands. The volumetric contraction results mainly from compression of interaggregate pores, and the intra-aggregate PSD or intra-aggregate pores are not affected. In compacted and saturated loess, interaggregate pores are compressed from the larger to the smaller, while in intact loess, the PSD evolution depends on whether the soil yields. This difference arises from different cementations that dominate particle associating in three soils. In intact loess, carbonate cementations that can be damaged by remolding and loading contribute greatly to particle associating. As a result, the stability of a pore is controlled not only by its size but also by carbonate cementations at surrounding particle contacts. Clay cementations that play the dominant role in particle aggregating in compacted loess are resistant to loading; thus, aggregates could not be destroyed by loading and the mechanical responses of compacted loess are in fact interactions among aggregates. Both carbonate and clay cementations can fail under the combined effect of loading and inundation, leading to disintegration of aggregates and turning of the loess structure from the double-structured to the uniform type.

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Volume Change Behavior of Two Compacted Clayey Soils under Hydraulic and Mechanical Loadings

Cited by 21 publications

References 37 publications

Volumetric behavior of natural swelling soil on drying-wetting paths. Application to the Boumagueur marl -Algeria-

Volumetric behavior of natural swelling soil on drying-wetting paths. Application to the Boumagueur marl -Algeria-

Hydromechanical Behavior of Low-Swelling Soils Compacted at Low Water Content: Laboratory Study

Pore‐Size Distribution Evolution of Intact, Compacted, and Saturated Loess from China during Consolidation and Shearing

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