Temperature Effects on Clay Soil Consolidation

Paaswell, Robert E.

doi:10.1061/jsfeaq.0000982

Cited by 98 publications

(26 citation statements)

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“…The model was afterwards modified by Picard (1994) who adopted a simpler exponential expression for the variations of isotropic yield stress with temperature. Based on a deeper examination of the experimental results from various authors (Paaswell 1967, Campanella and Mitchell 1968, Plum and Esrig 1969, Demars and Charles 1982, Houston and Lin 1987, Baldi et al 1988, 1991, Eriksson 1989, Tidfors and Sällfors 1989, Towhata et al 1993, proposed a multi-mechanism model able to account better for the effect of OCR on the volume change behaviour of clays under heating. Time-dependent phenomena are significant in deep clays in many underground geotechnical problems (Giraud & Rousset, 1996;Bastiaens et al, 2007) in relation to both the effects of pore water dissipation and of the soil skeleton viscosity.…”

Section: Introductionmentioning

confidence: 99%

Investigating the time-dependent behaviour of Boom clay under thermomechanical loading

et al. 2009

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Boom clay, a stiff clay, has been selected as a potential host formation for the geological disposal of radioactive waste in Belgium. The underground research facility HADES has been constructed to enable various in situ experiments to be performed on Boom clay so as to study the feasibility of high-level radioactive waste disposal, and to provide reliable data on the performance of Boom clay as a host formation. Among the various laboratory studies performed on samples extracted from the HADES facility to investigate the thermo-hydro-mechanical behaviour of Boom clay, relatively few were devoted to the time-dependent behaviour, limiting any relevant analysis of the long-term behaviour of the disposal facility. The present work aims at investigating the time-dependent behaviour of Boom clay under both thermal and mechanical loading. High-pressure triaxial tests at controlled temperatures were carried out for this purpose. The tests started with constant-rate thermal and/or mechanical consolidation and ended with isobar heating and/or isothermal compression at a constant stress rate or by step loading. The results obtained confirmed the effect of the overconsolidation ratio (OCR) on the thermal volume changes (i.e. thermal dilation under high OCRs and thermal contraction with OCR close to unity). Significant effects of temperature as well as of compression and heating rates were also observed on the volume change behaviour. After being loaded to a stress lower than the preconsolidation pressure (5 MPa) at a low temperature of 258C and at a rate lower than 0 . 2 kPa/min, the sample volume changes seemed to be quite small, suggesting a full dissipation of pore water pressure. By contrast, after being subjected to high loading and heating rates (including step loading or step heating), the volume changes appeared to be significant, particularly in the case of stresses much higher than the preconsolidation pressure. Because of its low permeability, full consolidation of Boom clay required a long period of time, and it was difficult to distinguish consolidation and creep from the total volume change with time.

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Section: Introductionmentioning

confidence: 99%

Investigating the time-dependent behaviour of Boom clay under thermomechanical loading

et al. 2009

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“…Other studies showed that the mechanical behavior of sand-clay mixtures highly depends on mineralogical composition, mineral structure of clay, clay proportions, temperature, and hydrogeological characteristics [42][43][44][45][46][47][48][49][50][51][52][53][54]. Further studies have also investigated the effect of water content [34,55,56], the swelling properties and the suction distribution [34,55,57], the porosity and permeability [56,58], and the volume changes [36] on sand-clay mixtures, pointing out that each of them has non-negligible effects on the behavior of such mixtures.…”

Section: Definition Of Sand-clay Mixturementioning

confidence: 99%

A Review of Sand–Clay Mixture and Soil–Structure Interface Direct Shear Test

et al. 2021

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Natural soils are usually heterogeneous and characterized with complex microstructures. Sand–clay mixtures are often used as simplified soils to investigate the mechanical properties of soils with various compositions (from clayey to sandy soils) in the laboratory. Performing laboratory tests on a sand–clay mixture with definite clay fraction can provide information to understand the simplified soils’ mechanical behavior and better predict natural soils’ behavior at the engineering scale. This paper reviews previous investigations on sand–clay mixture and soil–structure interface direct shear test. It finds that even though there are many investigations on sand–clay mixtures and soil–structure interfaces that consider pure sand or pure clay, limited data on the mechanical behavior of the interface between sand–clay mixture and structure materials are available. Knowledge is missing on how the clay content influences the mechanical behavior of interface and how the soil particles’ arrangement changes as the clay content increases. Further study should be performed to investigate the interface in terms of a reconstituted sand–clay mixture and structure by interface direct shear test, to highlight the influence of clay fraction on the interface response, under various loading conditions.

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“…As soil is heated under drained conditions, elastic and plastic volume changes may occur due to the expansion and contraction of the soil particles and pore water. Campanella and Mitchell 5 9 (1968) and Paaswell (1967) found that the primary mechanism for plastic volumetric strains during heating of saturated soils is the differential expansion of the water and soil particles.…”

Section: Temperature Effects On the Volume Change And Shear Strength Of Soilsmentioning

confidence: 99%

“…The stress state also plays an important role in the thermal volume change of soils. For example, in saturated soils with overconsolidation ratios (OCRs) greater than 3, elastic expansion is observed during heating and excess pore water pressures are not as significant as in normally consolidated conditions, leading to a negligible change in undrained shear strength (Paaswell 1967;Plum and Esrig 1969;Demars and Charles 1982;Baldi et al 1988;Hueckel and Baldi 1990;Hueckel and Pellegrini 1992;Towhata et al 1993;Delage et al 2000). Uchaipichat and Khalili (2009) observed that unsaturated soils have similar volume change behavior to saturated soils when heated under normally consolidated or overconsolidated conditions.…”

Section: Temperature Effects On the Volume Change And Shear Strength Of Soilsmentioning

confidence: 99%

Thermal Borehole Shear Device

Murphy¹,

McCartney

2014

Geotech. Test. J.

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This paper presents the details of a new modified borehole shear device that has the capability of measuring the impact of temperature on the in-situ shear stress-displacement curves for soil-concrete interfaces. The thermal borehole shear device incorporates concrete shoes with embedded heaters, a pneumatic loading device for application of horizontal normal stresses, and an automated loading system with local vertical displacement and load measurement systems that permits either displacement-control or load-control testing. A methodology for measurement of the soil-concrete shear stress-displacement curves and for evaluation of the drained interface shear strength failure envelopes at different temperatures is presented in this study. Typical results from proof-of-concept tests performed in a clay layer compacted in a laboratory tank in a borehole in a silty sand deposit in the field are presented in this paper. The results are synthesized to show how the impacts of temperature and normal stress on the normalized shear stressdisplacement curves can be evaluated. These normalized curves can be measured on a sitespecific basis for the calibration of thermo-mechanical load transfer analyses or finite element analyses, which are often used to design and evaluate soil-structure interaction in drilled shaft foundations with geothermal heat exchangers (energy foundations).

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Temperature Effects on Clay Soil Consolidation

Cited by 98 publications

References 0 publications

Investigating the time-dependent behaviour of Boom clay under thermomechanical loading

Investigating the time-dependent behaviour of Boom clay under thermomechanical loading

A Review of Sand–Clay Mixture and Soil–Structure Interface Direct Shear Test

Thermal Borehole Shear Device

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