Retention curves of bentonite under a microstructural perspective

M. V. Villar, R. Gomez-Espina, R. Campos, L. Gutierrez-Nebot, I. Barrios

Resultado de la investigación: Conference contribution

1 Cita (Scopus)

Resumen

The water retention capacity of two bentonites (FEBEX and MX-80) compacted at various dry densities was determined by stabilizing their water content under different suctions. After equilibrium the microstructure of the samples was explored by X-ray diffraction and mercury intrusion porosimetry. The equilibrium water contents depended on the suction level and, for the lowest suctions, on the dry density. The retention capacity of the FEBEX bentonite was higher than that of MX-80. The basal spacings of the bentonites increased with water content, although not lineally, and for particular ranges of suction the basal spacing remained constant while the water content increased, indicating that for certain levels of hydration part of the water was adsorbed in the pore network and not in the interlayer. Overall, the microstructure of the MX-80 seemed to be more homogeneous;- in particular, the FEBEX bentonite showed a clear predominance of micropores. For both bentonites the macropore size was the less represented, and its percentage and size mode decreased with dry density.

Idioma originalEnglish
Título de la publicación alojadaUnsaturated Soils
EditorialTaylor and Francis - Balkema
Páginas989-994
Número de páginas6
Volumen2
ISBN (versión impresa)9781138026902
EstadoPublished - 2014
Evento6th International Conference on Unsaturated Soils, UNSAT 2014 - Sydney, NSW, Australia
Duración: 2 jul 20144 jul 2014

Other

Other6th International Conference on Unsaturated Soils, UNSAT 2014
PaísAustralia
CiudadSydney, NSW
Período2/07/144/07/14

Huella dactilar

bentonite
suction
dry density
water content
microstructure
spacing
spatial distribution
micropores
macropores
macropore
water retention
hydration
X-ray diffraction
water holding capacity
mercury
water
sampling

ASJC Scopus subject areas

  • Soil Science

Citar esto

Villar, M. V., Gomez-Espina, R., Campos, R., Gutierrez-Nebot, L., & Barrios, I. (2014). Retention curves of bentonite under a microstructural perspective. En Unsaturated Soils (Vol. 2, pp. 989-994). Taylor and Francis - Balkema.
Villar, M. V. ; Gomez-Espina, R. ; Campos, R. ; Gutierrez-Nebot, L. ; Barrios, I. / Retention curves of bentonite under a microstructural perspective. Unsaturated Soils. Vol. 2 Taylor and Francis - Balkema, 2014. pp. 989-994
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Villar, MV, Gomez-Espina, R, Campos, R, Gutierrez-Nebot, L & Barrios, I 2014, Retention curves of bentonite under a microstructural perspective. En Unsaturated Soils. vol. 2, Taylor and Francis - Balkema, pp. 989-994, 6th International Conference on Unsaturated Soils, UNSAT 2014, Sydney, NSW, Australia, 2/07/14.

Retention curves of bentonite under a microstructural perspective. / Villar, M. V.; Gomez-Espina, R.; Campos, R.; Gutierrez-Nebot, L.; Barrios, I.

Unsaturated Soils. Vol. 2 Taylor and Francis - Balkema, 2014. p. 989-994.

Resultado de la investigación: Conference contribution

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N2 - The water retention capacity of two bentonites (FEBEX and MX-80) compacted at various dry densities was determined by stabilizing their water content under different suctions. After equilibrium the microstructure of the samples was explored by X-ray diffraction and mercury intrusion porosimetry. The equilibrium water contents depended on the suction level and, for the lowest suctions, on the dry density. The retention capacity of the FEBEX bentonite was higher than that of MX-80. The basal spacings of the bentonites increased with water content, although not lineally, and for particular ranges of suction the basal spacing remained constant while the water content increased, indicating that for certain levels of hydration part of the water was adsorbed in the pore network and not in the interlayer. Overall, the microstructure of the MX-80 seemed to be more homogeneous;- in particular, the FEBEX bentonite showed a clear predominance of micropores. For both bentonites the macropore size was the less represented, and its percentage and size mode decreased with dry density.

AB - The water retention capacity of two bentonites (FEBEX and MX-80) compacted at various dry densities was determined by stabilizing their water content under different suctions. After equilibrium the microstructure of the samples was explored by X-ray diffraction and mercury intrusion porosimetry. The equilibrium water contents depended on the suction level and, for the lowest suctions, on the dry density. The retention capacity of the FEBEX bentonite was higher than that of MX-80. The basal spacings of the bentonites increased with water content, although not lineally, and for particular ranges of suction the basal spacing remained constant while the water content increased, indicating that for certain levels of hydration part of the water was adsorbed in the pore network and not in the interlayer. Overall, the microstructure of the MX-80 seemed to be more homogeneous;- in particular, the FEBEX bentonite showed a clear predominance of micropores. For both bentonites the macropore size was the less represented, and its percentage and size mode decreased with dry density.

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Villar MV, Gomez-Espina R, Campos R, Gutierrez-Nebot L, Barrios I. Retention curves of bentonite under a microstructural perspective. En Unsaturated Soils. Vol. 2. Taylor and Francis - Balkema. 2014. p. 989-994