Oedometer test
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Influence of structure on the behavior of a saturated clayey loess Open
An intensive experimental investigation by means of triaxial and oedometer tests was performed on a clayey loess that was retrieved from two depths at a location on the southern Chinese Loess Plateau. Intact and reconstituted samples were …
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Experimental study on a dredged fill ground improved by a two-stage vacuum preloading method Open
The vacuum preloading method has been wisely chosen among many ground-improvement methods considering the time limit of many projects and the characteristics of reclaimed soil. However, the loss in vacuum with soil depth, the clogging arou…
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Evaluation of the Improvement Effect of Limestone Powder Waste in the Stabilization of Swelling Clayey Soil Open
The natural stone industry generates large amounts of industrial waste every year. Limestone powder produced by the activity of this industry is dumped into landfills, generating an environmental impact that could be reduced by using this …
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Macro-meso effects of gradation and particle morphology on the compressibility characteristics of calcareous sand Open
In order to fully develop the South China Sea, a large number of reclamation projects using calcareous sand have been carried out in this area recently. A deep understanding of the physical and mechanical properties of calcareous sand is o…
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Prediction of the variation of swelling pressure and one-dimensional heave of expansive soils with respect to suction using the soil-water retention curve as a tool Open
The one-dimensional (1-D) potential heave (or swell strain) of expansive soil is conventionally estimated using the swelling pressure and swelling index values that are determined from different types of oedometer test results. The swellin…
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Small-strain shear modulus of calcareous sand under anisotropic consolidation Open
In this study, the small-strain shear modulus of a calcareous sand was investigated by conducting bender element tests on both horizontal and vertical planes. The effects of sample preparation method, stress path and stress history on the …
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Improved Geotechnical Behavior of an Expansive Soil Amended with Tire-Derived Aggregates Having Different Gradations Open
This experimental laboratory study examines the potential use of tire-derived aggregate (TDA) products as an additive to alleviate the inferior geotechnical properties of a subgrade deposit of clay soil with high expansivity. A total of te…
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A simple hypoplastic model with loading surface accounting for viscous and fabric effects of clays Open
Summary This paper presents a simple hypoplastic model capturing mostly all salient features of clays: rate dependency, time dependency and inherent and induced anisotropy without being restricted to only viscoplastic clays. Therefore, due…
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Hydraulic properties of dune sand–bentonite mixtures of insulation barriers for hazardous waste facilities Open
This paper presents a study on the valorization of local materials such as desert dune sand obtained from Laghouat region in the South Algeria and mine bentonite intended for the realization of liner base layers in the conception of insula…
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Strength and stiffness parameters for hardening soil model of rockfill materials Open
In recent years, an increasing number of rockfill dams have been constructed in many developing countries around the world. One difficulty in the engineering design and construction of rockfill dams is the characterisation of the rockfill …
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Applications of Electrical Resistivity Surveys in Solving Selected Geotechnical and Environmental Problems Open
Standard test methods may not be suitable or sufficient for determining the geotechnical conditions of a structure’s subsoil and the effects of the designed structures on the environment. Geophysical test methods, validated with other meth…
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Swelling characteristics of soils subjected to acid contamination Open
The ever-increasing number of failures of industrial structures due to the heaving of acid-contaminated foundation soils has necessitated a better understanding of soil behavior under changing and extreme environmental conditions. Thus, th…
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The Influence of Viscoelastic Crustal Rheologies on Volcanic Ground Deformation: Insights From Models of Pressure and Volume Change Open
Inelastic rheological behavior, such as viscoelasticity, is increasingly utilized in the modeling of volcanic ground deformation, as elevated thermal regimes induced by magmatic systems may necessitate the use of a mechanical model contain…
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Effect of pore water chemistry on the behaviour of a kaolin–bentonite mixture during drying and wetting cycles Open
The behaviour of a kaolin–bentonite mixture with different pore water chemistry, i.e. distilled water, NaCl and CaCl2 solutions, was investigated through a number of cyclic drying and wetting tests. Experimental tests were carried out on c…
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Soil desiccation cracks as a suction–contraction process Open
Recent macro- and particle-scale advances in unsaturated soil behaviour have led to an enhanced understanding of the effects of moisture changes on soil response. This research examines desiccation cracks as a suction–contraction-coupled p…
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Characterization and Engineering Properties of Dry and Ponded Class-F Fly Ash Open
Characterization studies conducted on Class-F fly-ash specimens gathered from different producers in the southeastern United States confirm general trends reported for fly ash worldwide. Additional tests and detailed analyses explain the s…
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A new approach to predict the compression index using artificial intelligence methods Open
The compression index is one of the important geotechnical parameters, essential for the structural design. Since the determination of the compression index based on oedometer tests is relatively expensive and time-consuming, different aut…
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Effects of Temperature and Thermal Cycles on the Elastic Shear Modulus of Saturated Clay Open
Thermomechanical behavior of soils has attracted great attention in recent years because of its great importance in some emerging geotechnical applications such as energy piles. So far, the thermoplasticity (e.g., the influence of temperat…
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Characterization and engineering properties of the NGTS Onsøy soft clay site Open
In the 1960s, NGI investigated numerous potential research sites and established the first Onsøy soft clay site in 1968. In 2016, the NGTS project established five research sites, one of which is the NGTS Onsøy soft clay site. The purpose …
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Feasibility of using electrokinetics and nanomaterials to stabilize and improve collapsible soils Open
Loess as a subcategory of collapsible soils is a well-known aeolian deposit generally characterized as a highly-porous medium with relatively low natural density and water content and a high percentage of fine-grained particles. Such colla…
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Intrinsic compression behavior of remolded sand–clay mixture Open
A series of incremental loading oedometer tests was conducted on pure clays and sand–clay mixtures with various sand/clay ratios and clay mineral compositions. The void indexes I v and I vH were introduced to evaluate their intrinsic compr…
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Accuracy of determining pre-consolidation pressure from laboratory tests Open
Shear strength and compressibility of fine-grained soils is strongly influenced by their stress history and the maximum (pre-consolidation) pressure ([Formula: see text]). Accurate determination of [Formula: see text] is thus critical for …
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The Alternatives to Traditional Materials for Subsoil Stabilization and Embankments Open
Major infrastructure projects require significant amount of natural materials, often followed by the soft soil stabilization using hydraulic binders. This paper presents the results of a laboratory study of alternative waste materials (fly…
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Creep and consolidation of a stiff clay under saturated and unsaturated conditions Open
In this paper, the one-dimensional (1D) time-dependent behaviour of natural and reconstituted London Clay samples under saturated and unsaturated conditions is studied. For this purpose, a set of 1D consolidation tests including multi-stag…
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Rate Dependency and Stress Relaxation of Unsaturated Clays Open
This paper presents the experimental program conducted for evaluation of the rate-dependent and stress-relaxation behavior of unsaturated reconstituted London clay. A series of drained constant rate of strain (CRS) compression-relaxation t…
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Settlement assessment of gypseous sand after time-based soaking Open
This paper investigates the effect of the soaking process on gypseous sand soils. The recent research investigates the time-based soaking method on high gypsum contents (29%) of soil samples. The softening of gypsum materials upon wetting …
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Particle–scale interactions and energy dissipation mechanisms in sand–rubber mixtures Open
Sand−rubber mixture (SRm) behaviour is affected by rubber content (RC) while dissipation in sands is caused by inter-particle sliding. Dissipation in SRm is as, or more significant than in sands. However, the mechanisms of dissipation in S…
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Potential of fly ash to suppress the susceptible behavior of lime-treated gypseous soil Open
The use of lime and fly ash to improve the properties of certain types of soil is well established. However, the potential of fly ash to control the adverse effects of lime-treated gypseous/sulphatic soil has not been well investigated. In…
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Crushing and Flooding Effects on One-Dimensional Time-Dependent Behaviors of a Granular Soil Open
Particle crushing contributes significantly to the time-dependent compression behaviors of crushable granular soils. It also is widely accepted that flooding aggravates the breakage level of soil particles. This study investigated the comb…
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Tunnels in swelling ground: simulation of 3D stress paths by triaxial laboratory testing Open
The research is devoted to study the swelling behaviour in tunnels. A new triaxial testing procedure is developed, which is able to quantify the swelling behaviour of soft rocks and stiff soils. The Caneva Clay is tested both by convention…