Swelling pressure evolution in compacted bentonite: Experiments and modelling

M. Sánchez, M. V. Villar, R. Gómez-Espina, A. Lloret, A. Gens

Resultado de la investigación: Contribución a los tipos de informe/libroContribución a la conferencia

1 Cita (Scopus)

Resumen

This work presents experimental results about the saturation of bentonite under constant volume and the simultaneous development of swelling pressure. The tests have been performed at room temperature under conditions of free availability of liquid water. Water intake and swelling pressure development were measured. The tests have been performed with a bentonite compacted to dry densities between 1.4 and 1.7 g/cm 3. The results obtained show that swelling pressure does not develop in a uniform way, but present more that one swelling stage. After a sharp initial increase, there is a period of time in which pressure increases more slowly or-for the lower densities-even decreases. This behaviour has also been detected in other clays and can be explained as a consequence of the complex fabric of this material, with the typical double porosity observed in expansive clays. A double structure framework specifically developed to analyse the behaviour of swelling clays has been used in this work to model the swelling pressure evolution of the FEBEX bentonite.

Idioma originalInglés
Título de la publicación alojadaUnsaturated Soils - Proceedings of the 5th International Conference on Unsaturated Soils
Páginas359-364
Número de páginas6
Volumen1
EstadoPublicada - 2011
Evento5th International Conference on Unsaturated Soils - Barcelona, Espana
Duración: 6 sep 20108 sep 2010

Otros

Otros5th International Conference on Unsaturated Soils
PaísEspana
CiudadBarcelona
Período6/09/108/09/10

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  • Citar esto

    Sánchez, M., Villar, M. V., Gómez-Espina, R., Lloret, A., & Gens, A. (2011). Swelling pressure evolution in compacted bentonite: Experiments and modelling. En Unsaturated Soils - Proceedings of the 5th International Conference on Unsaturated Soils (Vol. 1, pp. 359-364)