DISCUSSION: Compaction behaviour of clay. A. TARANTINO and E. DE COL (2008). <i>Géotechnique</i> <b>58</b>, No, 3, 199–213

Delage, Pierre

doi:10.1680/geot.2008.59.1.75

Géotechnique

2009

DOI: 10.1680/geot.2008.59.1.75

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DISCUSSION: Compaction behaviour of clay. A. TARANTINO and E. DE COL (2008). Géotechnique 58, No, 3, 199–213

Pierre Delage

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Cited by 14 publications

References 7 publications

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Further insight into the microstructure of compacted bentonite–sand mixture

Saba

Delage

Lenoir

et al. 2014

Engineering Geology

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Compacted bricks of bentonite/sand mixture are planned to be used as sealing plugs in deep radioactive waste disposal repositories because of their low permeability, high swelling capacity and favourable properties with respect to radionuclide retention. The isolating capacity of compacted bentonite/sand mixture is closely related to microstructure features that have been often investigated, in particular by using scanning electron microscope (SEM or ESEM) and mercury intrusion porosimetry (MIP). In this work, microfocus X-ray computed tomography (µCT) observations were used in parallel with MIP measurements to further investigate at larger scale the microstructure of a laboratory compacted bentonite/sand disk (65/35% in mass). Qualitative observation of µCT images showed that sand grains were interconnected with some large pores between them that were clearly identified in the bimodal pore distribution obtained from MIP measurements. Due to gravitational and to frictional effects along the specimen periphery, a higher density was observed in the centre of the specimen with bentonite grains more closely compacted together. This porosity heterogeneity was qualitatively estimated by means of image analysis that also allowed the definition of the representative elementary volume. Image analysis also provided an estimation of the large porosity in good agreement with MIP measurements.

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Further insight into the microstructure of compacted bentonite–sand mixture

Saba

Delage

Lenoir

et al. 2014

Engineering Geology

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Relationship between soil structure and water retention properties in a residual compacted soil

Otálvaro

Neto

Delage

et al. 2016

Engineering Geology

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Mechanical behaviour of bimodal kaolin clay with aggregates

Kühn

Lopes

Caicedo

et al. 2022

Engineering Geology

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DISCUSSION: Compaction behaviour of clay. A. TARANTINO and E. DE COL (2008). Géotechnique 58, No, 3, 199–213

Cited by 14 publications

References 7 publications

Further insight into the microstructure of compacted bentonite–sand mixture

Further insight into the microstructure of compacted bentonite–sand mixture

Relationship between soil structure and water retention properties in a residual compacted soil

Mechanical behaviour of bimodal kaolin clay with aggregates

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