Shales are fine-grained sedimentary geomaterials composed of clay minerals and tiny fragments (silt-sized particles) of other minerals, especially quartz and calcite. Shales are characterized by the presence of lamination and fissility which contribute in the development of a marked anisotropic behaviour. In addition, they are characterized by a very low permeability and good self-sealing potential; these properties make shales a suitable host material for many engineering applications. In this sense, the geomechanical behaviour of shales is quickly becoming one of the most important issues in modern geomechanics, largely driven by the nuclear waste geological storage and petroleum industries (i.e., the extraction of gas shale and the sequestration of CO2). In any such application, a deep understanding of the hydro-mechanical behaviour of the involved materials is of primary significance and it is indeed an exciting subject of research for the civil and environmental engineering society.
Research group for shales:
- V. Favero, A. Ferrari and L. Laloui. Water retention behaviour of shales. Fourth EAGE Shale Workshop, Porto, Portugal, April 7-9, 2014.
- V. Favero, F. Alessio and L. Lyesse. Retention Properties and Permeability of Shales. Géotechnique Symposium in Print 2013, London, UK.
- A. Ferrari, V. Favero, D. Manca and L. Laloui. Volumetric behavior and consolidation of shales at high confining stresses. 47th US Rock Mechanics/Geomechanics Symposium, San Francisco (USA), 26-29 June 2013.
- L. Laloui, A. Ferrari. Multiphysical Testing of Soils and Shales, Springer, 2012.
- L. Laloui, A. Ferrari and S. Salager. Testing the Thermo-Hydro-Mechanical Behaviour of a Shale. 3rd EAGE Shale Workshop, Barcelona, 2012.
- S. Salager, A. Ferrari and L. Laloui. New experimental tools for the characterization of highly overconsolidated clayey materials in unsaturated conditions, in Mechanics of unsaturated geomaterials, p. 113-126, 2010.
- A. Seiphoori, A. Ferrari and L. Laloui. An advanced calibration process for a thermo-hydro-mechanical triaxial system. International Symposium on Deformation Characteristics of Geomaterials, Séoul, 2011.
- P. J. Witteveen, A. Ferrari and L. Laloui. An experimental and constitutive investigation on the chemo-mechanical behaviour of a clay, in Geotechnique -London-, vol. 63, num. 3, p. 244–255, 2013.
- A. Ferrari and L. Laloui. Advances in the Testing of the Hydro-mechanical Behaviour of Shales. , Springer Series in Geomechanics and Geoengineering, 2012.