Effects of temperature on strength and compressibility of sand-bentonite buffer

Lingnau, B.E.; Graham, J.; Yarechewski, D.; Tanaka, N.; Gray, Μ. N.

doi:10.1016/0013-7952(95)00028-3

Cited by 80 publications

(24 citation statements)

References 7 publications

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“…This is consistent with results from Campanella and Mitchell (1968) and Lingnau et al (1996). Compression and unload-reload (recompression) indices (C c and C r , respectively) decrease with depth, perhaps as a result of decreasing plasticity and clay fraction (Fig.…”

Section: Oedometer Testssupporting

confidence: 91%

Deformations and ground temperatures at a road embankment in northern Canada

et al. 2014

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The paper examines the behaviour of a highway embankment in an area of discontinuous permafrost about 18 km northwest of Thompson, Manitoba. Frequent maintenance has been required. Research involved site investigation, laboratory testing, installing instruments, data collection, and numerical modeling. The paper reports data from almost 3 years of observation. Measurements of ground temperatures suggest that formerly ice-rich foundation soil has thawed under the toe and side-slope. Approximate values of segregation potential have been back-calculated from observations of settlements and temperatures. Results provide insight into the nature and cause of deformations of the embankment.Résumé : Cet article présente le comportement d'un remblai d'autoroute situé dans une zone de pergélisol discontinu, environ 18 km au nord-ouest de Thompson, Manitoba. Cette zone nécessite de la maintenance sur une base régulière. Les travaux de recherche comprennent des investigations de site, des essais en laboratoire, l'installation d'instruments, la collecte de données, et des modélisations numériques. Cet article rapporte les données récoltées pendant près de 3 années d'observation. Les mesures de la température du sol suggèrent que le sol de fondation initialement riche en glace a fondu sous la base et la pente de côté. Des valeurs approximatives du potentiel de ségrégation ont été rétro-calculées à partir des tassements et températures observés. Les résultats donnent des informations sur la nature et la cause des déformations du remblai. [Traduit par la Rédaction]

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Section: Oedometer Testssupporting

confidence: 91%

Deformations and ground temperatures at a road embankment in northern Canada

et al. 2014

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“…Similar results were found in different studies using Azraq Green clay ( [72]) and MX-80 bentonite ( [73]). Also, as in some other studies ( [74]), it was noticed that the increase in temperature for a constant pH value caused a decrease in the swelling pressure as well (also appreciable in Fig. 7).…”

Section: Influences Of Alkaline Solutionssupporting

confidence: 60%

Investigation on chemical effects on GMZ bentonite used as buffer materials

2016

E3S Web Conf.

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Abstract. GMZ bentonite has been selected as a buffer/backfill material for the design of Chinese HLW repository due to its suitable properties. Investigations have been conducted on this material to have a better understanding of its engineering behavior. In this paper, a review of the studies on the chemical effects in GMZ bentonite is presented. The adsorption of radionuclides Ni(II), Cr(III) and Eu(III) etc. on GMZ bentonite is investigated and the influences of external chemical agents are assessed. Some modifications on GMZ bentonite have been implemented to improve its adsorption properties. In the meantime, the influences of NaOH solutions with variations in concentration and pH values on hydraulic conductivity, mechanical behavior and mineralogy of GMZ bentonite are investigated with consideration of temperature. Effects of salt solutions are also assessed in different studies using solutions of Na + and Ca 2+ , which are the predominant cations in the groundwater of Beishan area. It is observed that both cations influence the buffering behavior of bentonite at a different degree. Further investigations should be done for better understanding the influences of coupling factors and time on the chemical behavior of material.

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“…The impact of temperature on shear resistance is complex. Some authors such as Mitchell (1964), Sherif andBurrous (1969), de Bruyn andThimus (1996), Lingnau et al (1996) and Wiebe et al (1998) showed that ground heating leads to a decreasing of shear resistance whereas Noble and Demirel (1969), Houston et al (1985), Tanaka et al (1996) and Cekerevac and Laloui (2004) noticed the opposite results. In fact, heating and loading cause opposite effects.…”

Section: Introductionmentioning

confidence: 91%

Fractal evaluation of the fragmentation of clays due to desiccation

Vallejo¹

2013

Advances in Unsaturated Soils

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Effects of temperature on strength and compressibility of sand-bentonite buffer

Cited by 80 publications

References 7 publications

Deformations and ground temperatures at a road embankment in northern Canada

Deformations and ground temperatures at a road embankment in northern Canada

Investigation on chemical effects on GMZ bentonite used as buffer materials

Fractal evaluation of the fragmentation of clays due to desiccation

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