Effect of temperature on the water retention capacity of FEBEX and MX-80 bentonites

M. V. Villar, R. Gómez-Espina

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

11 Citas (Scopus)

Resumen

The retention curves of the FEBEX and MX-80 bentonites compacted at dry densities from 1.3 to 1.8 g/cm 3 have been determined using methods that allow the volume of the samples to remain constant during the determination. The methods have been upgraded to use them at high temperatures, and thus the range of temperatures between 20 and 120°C has been explored. For a given density and water content, suction decreases as temperature increases at a rate that is larger than that predicted on the basis of the water surface tension change with temperature. Hysteresis on heating/cooling cycles has been observed, especially in the MX-80 bentonite. For suctions higher than 10 MPa and for a given temperature and water content, the suction measured is slightly higher for higher dry density of the bentonite. However, for lower suctions this trend clearly inverts. The water retention capacity is lower for the MX-80 bentonite, although the difference is lessened for low suctions. The retention capacity of the FEBEX bentonite is more affected by temperature than that of the MX-80.

Idioma originalInglés
Título de la publicación alojadaUnsaturated Soils
Páginas257-262
Número de páginas6
EstadoPublicada - 2008
Evento1st European Conference on Unsaturated Soils, E-UNSAT 2008 - Durham, Reino Unido
Duración: 2 jul 20084 jul 2008

Otros

Otros1st European Conference on Unsaturated Soils, E-UNSAT 2008
País/TerritorioReino Unido
CiudadDurham
Período2/07/084/07/08

Áreas temáticas de ASJC Scopus

  • Edafología
  • Ingeniería geotécnica y geológica

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