Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Small-strain shear stiffness of compacted bentonites for engineered barrier system
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 pressures and strains levels for studying the influence of these parameters on the shear modulus. The results show similar tendencies in both bentonites: the shear modulus increases as the dry density increases and exhibits maximum shear modulus when degree of saturation is around 80%. An empirical equation, taking into account the microstructure of the clays, is used to evaluate the shear modulus at small strains as a function of dry density and degree of saturation. Although the values of the shear modulus measured are similar in both bentonites for a given stress and degree of saturation, there is difference in the elastic strain limit of the soil. Bentonite clay is going to be part of the Engineered Barrier System (EBS) in deep geological disposal facilities for the long-term confinement of spent nuclear fuel. In order to fully understand their long-term performance, their behaviour in shearing conditions should be assessed. ; Peer Reviewed ; Postprint (author's final draft)
Small-strain shear stiffness of compacted bentonites for engineered barrier system
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 pressures and strains levels for studying the influence of these parameters on the shear modulus. The results show similar tendencies in both bentonites: the shear modulus increases as the dry density increases and exhibits maximum shear modulus when degree of saturation is around 80%. An empirical equation, taking into account the microstructure of the clays, is used to evaluate the shear modulus at small strains as a function of dry density and degree of saturation. Although the values of the shear modulus measured are similar in both bentonites for a given stress and degree of saturation, there is difference in the elastic strain limit of the soil. Bentonite clay is going to be part of the Engineered Barrier System (EBS) in deep geological disposal facilities for the long-term confinement of spent nuclear fuel. In order to fully understand their long-term performance, their behaviour in shearing conditions should be assessed. ; Peer Reviewed ; Postprint (author's final draft)
Small-strain shear stiffness of compacted bentonites for engineered barrier system
Pintado Llurba, Xavier (Autor:in) / Romero Morales, Enrique Edgar (Autor:in) / Suriol Castellví, Josep (Autor:in) / Lloret Morancho, Antonio (Autor:in) / Madhusudhan, B. N. (Autor:in) / Universitat Politècnica de Catalunya. Departament d'Enginyeria Civil i Ambiental / Universitat Politècnica de Catalunya. MSR - Mecànica del Sòls i de les Roques
01.06.2019
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Àrees temàtiques de la UPC::Desenvolupament humà i sostenible::Enginyeria ambiental::Tractament dels residus , Bentonite deposits , Residus radioactius -- Emmagatzematge , Radioactive waste disposal in the ground , Resonant column Shear modulus Engineered barrier system Suction Effective degree of saturation Macro structure , Àrees temàtiques de la UPC::Enginyeria civil::Geotècnia::Mecànica de sòls , Bentonita -- Propietats mecàniques
DDC:
690
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