Influence of stress history on the strength parameters of an unsaturated statically compacted soil

Nishimura, Takuya; Hirabayashi, Yasunari; Fredlund, D. G.; Gan, Julian

doi:10.1139/cgj-36-2-251

Cited by 4 publications

(1 citation statement)

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“…Many reports regard to soil-water characteristic curve or suction controlling procedure have been initiated to expand the mathematical simulation models [28][29][30][31][32][33]. Then, shear strength mechanics or experimental method with suction controlling supported the interpretation of unsaturated bentonite properties as scientific and technical background [34][35][36][37][38][39][40][41][42][43][44][45][46].…”

Section: Introduction mentioning

confidence: 99%

Changing of Properties of Unsaturated Compacted Bentonite due to Hydration Effort

Nishimura¹,

Koseki²

2018

JESE-B

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Radioactive waste disposal is important facility for human and environment in the world. Compacted bentonite in radioactive disposal engineer barrier design really experience hydration effort as decreasing of suction during long-time. Hydration effort develop macro-micro void structure in bentonite under deeply geological environment. The bentonite occurred uncertainly problems or translation in various experimental interaction boundary conditions such as thermal-hydration-chemical condition. To detect accumulation of deformation or changing of bentonite behaviour due to these processes is important that the modified experimental methods are required. In addition, to interpret laboratory experimental results combine to establish mathematical modelling in possible. The overall investigation or performance of the bentonite have contributed to represent the intrinsic properties of engineer barrier systems. This study focused on changing of properties of unsaturated compacted bentonite related to hydration effort due to increasing of relative humidity. Changing of some properties revealed to become instability or uncertainly problems in practice. Soil-water characteristic curve was measured with considering of various temperatures using vapor pressure technique. Swelling pressure and creep behaviour such as mechanical components were described with hydration effort.

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