Cerca
Ara es mostren els items 1-10 de 12
Experimental investigation into temperature effect on hydro-mechanical behaviours of bentonite
(Science Press, 2010)
Article.
Accés obert
Article.
Accés obert
The bentonite barrier of underground repositories for high-level radioactive waste will be hydrated by the groundwater while it is subjected to high temperatures due to the radioactive decay of the wastes. These changes ...
Modelling of oedometer tests on pellet-powder bentonite mixtures to support mock-up test analysis
(EDP Sciences, 2020-10)
Article.
Accés obert
Article.
Accés obert
Bentonite mixtures of MX-80 (80% of high-density pellets and 20% of bentonite powder on a mass basis) have been recently proposed as a candidate material for sealing deep geological disposals of high-level radioactive ...
Microstructural and hydro-mechanical behaviour of bentonite pellets and powder mixtures
(EDP Sciences, 2020-10)
Article.
Accés obert
Article.
Accés obert
Binary mixtures of high-density MX-80 bentonite pellets (80%) and bentonite powder (20%) at hygroscopic water content have been recently considered as an alternative engineered barrier system for the long-term disposal of ...
Gas transport in granular compacted bentonite: coupled hydro-mechanical interactions and microstructural features
(EDP Sciences, 2020-10)
Article.
Accés obert
Article.
Accés obert
The initial conditions (dry density and saturation state), the stress state and its history, and the deformation undergone during gas migration, affect the gas transport processes in granular compacted bentonite. Additionally, ...
Modelling advective gas flow in compact bentonite: lessons learnt from different numerical approaches
(Elsevier, 2021-03)
Article.
Accés obert
Article.
Accés obert
In a repository for radioactive waste hosted in a clay formation, hydrogen and other gases may be generated due
to the corrosion of metallic materials under anoxic conditions, the radioactive decay of waste and the ...
Mechanical characteristics and water retention properties of unsaturated 'bentonite-based engineered barrier materials' based on controlled-suction tests
(Japan Society of Civil Engineers, 2019-07)
Article.
Accés restringit per política de l'editorial
Article.
Accés restringit per política de l'editorial
Bentonite-based engineered barrier materials transfer from unsaturated state as emplaced to saturated state after closure of deep geological disposal facilities for radioactive waste, while decrease in saturation could ...
Assessment of a high-level spent nuclear fuel disposal model
(2020-02)
Article.
Accés restringit per política de l'editorial
Article.
Accés restringit per política de l'editorial
This paper assesses a model for the full-scale engineered barrier experiment (Febex) in situ test, simulating the disposal of heat-emitting, high-level spent nuclear fuel. The model has been developed using Code_Bright and ...
Modelling engineered barriers for spent nuclear fuel repository using a double-structure model for pellets
(2020-02)
Article.
Accés obert
Article.
Accés obert
This paper describes an experimental programme and the corresponding modelling in order to characterise the hydromechanical (HM) behaviour of pellets. At least two levels of porosity can be distinguished in the pellets: ...
Increasing understanding and confidence in THM simulations of engineered barrier systems
(2020-02)
Article.
Accés obert
Article.
Accés obert
Previous studies on the modelling of coupled thermo-hydro-mechanical (THM) processes in bentonite-based engineered barrier systems (EBSs) showed the sensitivity of the output quantities to changes in the input parameters. ...
Small-strain shear stiffness of compacted bentonites for engineered barrier system
(Elsevier, 2019-06)
Article.
Accés obert
Article.
Accés obert
The shear modulus (G) of two different bentonites was measured by means of a resonant column apparatus. The samples were compacted at different dry densities and degrees of saturation and tested with different confinement ...