An experimental study of the water transfer through confined compacted GMZ bentonite

Ye, Weimin; Cui, Yu‐Jun; Qian, Lixin; Bao, Chen

doi:10.1016/j.enggeo.2009.08.003

Cited by 177 publications

(71 citation statements)

References 16 publications

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“…Using a self-designed cell, Ye et al (2009a) measured the unsaturated hydraulic conductivity of GMZ bentonite with a dry density of 1.7 g/cm 3 under confined conditions at ambient temperature. With the instantaneous profile method, the unsaturated hydraulic conductivities measured at different locations along the height of the specimen evolving with suction are presented in Fig.…”

Section: Unsaturated Hydraulic Conductivitymentioning

confidence: 99%

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Investigation on hydraulic properties of compacted GMZ bentonite used as buffer/backfill material

Xin

Chen

et al. 2016

E3S Web Conf.

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Abstract. During the past decades, GMZ bentonite has been widely investigated for its use as buffer/backfill materials in China. Based on a comprehensive review of the former studies, achievements on experimental and theoretic works on the hydraulic aspects of compacted GMZ bentonite with consideration of temperature effects are presented in this paper. Water retention property of compacted GMZ bentonite depends on constraint conditions. Temperature effects on water-retention depend on constraint conditions and suction. The hysteresis behaviour is not obvious. Based on the test results, a revised water retention model was developed for considering the temperature effect. The saturated hydraulic conductivity of the densely compacted GMZ bentonite increases as dry density and temperature increases. A revised model, which considers temperature influence on water viscosity and the effective flow cross-sectional area of porous channels, for prediction of saturated hydraulic conductivity have been developed and verified. The unsaturated hydraulic conductivity of confined densely compacted GMZ bentonite samples decreases first and then increases with suction decrease from an initial value of 80 MPa to zero. With consideration of temperature effects and microstructure changes, a revised model for prediction of unsaturated hydraulic conductivity of compacted GMZ01 bentonite was proposed.

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Section: Unsaturated Hydraulic Conductivitymentioning

confidence: 99%

“…Beishan in Gangsu Province has been selected as the potential site for construction of the first repository in China. Gaomiaozi (GMZ) bentonite has been considered as a possible material for the construction of engineered barrier in the recent Chinese program of radioactive waste disposal (Liu et al, 2001;Ye et al 2009a). …”

Section: Introductionmentioning

confidence: 99%

Investigation on hydraulic properties of compacted GMZ bentonite used as buffer/backfill material

Xin

Chen

et al. 2016

E3S Web Conf.

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“…In this regard, the degree of swelling allowed by the technological voids described above has a significant influence on the hydro-mechanical behaviour of the compacted Bentonite and their effects need to be better understood. Swelling results in a decrease in dry density that may lead to a degradation of the hydro-mechanical performance of engineered barriers [12,13]. As a result, the safety function expected in the design may no longer be properly ensured.…”

Section: Introductionmentioning

confidence: 99%

Velocity Dynamics Effect on Partial Deposition of Lead of Heterogeneous Coarse Formation Applying Predictive Model

Sn¹

2017

MOJCE

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This paper monitors partial deposition of lead through the influences from velocity dynamics in heterogeneous coarse depositions. The study examine rate of deposition at different strata under the influences of heterogeneous coarse in the study location, the transport of lead in coarse formation developed variation of concentration through heterogeneity of velocity of fluid dynamics in the study area, the system were develop by considering the migration rate of the contaminant at various depth, the developed system generated the governing equation to produced the derived model at different phase, the derived solution generated model at different phase base on the behaviour of velocity dynamics in the study area, the study is imperative because the derived model will definitely monitor the rate of partial deposition of lead in the study location. Keywords:

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“…To further assess the influence of temperature on the unsaturated permeability of the highly 229 compacted GMZ01 bentonite, the unsaturated hydraulic conductivity of the confined specimen at 230 20°C (Ye et al, 2009a) are compared to those measured at 40°C and 60°C (Fig.11). It can be seen that 231 under confined conditions, the unsaturated hydraulic conductivity of the highly compacted GMZ01 232 bentonite increases with temperature rise.…”

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confidence: 99%

“…The Gaomiaozi deposit is located in the northern Chinese Inner Mongolia autonomous region, 84 300 km northwest from Beijing (Ye et al, 2009a(Ye et al, , 2010b used either in the laboratory or in situ (Benson and Gribb 1997). 93 In order to apply this method to determine the unsaturated permeability of the GMZ01 bentonite 94 at different temperatures, on the one hand, the SWRCs of this soil should be determined at relevant 95 temperatures, and on the other hand, the corresponding suction profiles should be determined by 96 performing infiltration test at different temperatures with suction monitoring.…”

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Temperature effects on the unsaturated permeability of the densely compacted GMZ01 bentonite under confined conditions

Wan

Bao

et al. 2012

Engineering Geology

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112

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15In this study, temperature controlled soil-water retention tests and unsaturated hydraulic conductivity under confined conditions, the hydraulic conductivity increases as temperature increases, at a 27 decreasing rate with temperature rise. It was also observed that the influence of temperature on the 28 hydraulic conductivity is quite suction-dependent. At high suctions (s > 60 MPa), the temperature 29 effect is mainly due to its influence on water viscosity; by contrast, in the range of low suctions (s < 30 60 MPa), the temperature effect is related to both the water viscosity and the macro-pores closing 31 phenomenon that is supposed to be temperature dependent.

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An experimental study of the water transfer through confined compacted GMZ bentonite

Cited by 177 publications

References 16 publications

Investigation on hydraulic properties of compacted GMZ bentonite used as buffer/backfill material

Investigation on hydraulic properties of compacted GMZ bentonite used as buffer/backfill material

Velocity Dynamics Effect on Partial Deposition of Lead of Heterogeneous Coarse Formation Applying Predictive Model

Temperature effects on the unsaturated permeability of the densely compacted GMZ01 bentonite under confined conditions

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