Influence of fissure inclination and confining pressure on the local behaviour of natural clays

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceeding

Abstract

In this experimental study the influence of fissuring orientation and confinement pressure on the mechanical behaviour of natural clays is investigated. The tested material, the scaly clay from Santa Croce di Magliano (south of Italy), is characterised by an intense network of pre-existing fissures of single orientation. Several plane strain compression tests have been conducted, under different confinement pressures (i.e., from 50 to 600 kPa), on specimens having fissures with vertical, medium and horizontal inclination. Digital Image Correlation has been used to follow the deformation processes of the specimens throughout the tests by measuring incremental shear and volumetric strain maps. The results showed a strong coupling between the total confinement and the fissure inclination, that is controlling both the onset and the development of the patterns of the localisation processes. The new results have been compared with previous ones carried out on the same material without confinement. The comparison shed light on the role of total confinement that becomes particularly relevant from certain levels of pressures and fissuring inclination.

Details

Authors
Organisations
External organisations
  • Polytechnic University of Bari
  • University Grenoble Alpes
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Geotechnical Engineering
Original languageEnglish
Title of host publication7th International Symposium on Deformation Characteristics of Geomaterials, IS-Glasgow 2019
EditorsErdin Ibraim, Alessandro Tarantino
PublisherEDP Sciences
Volume92
ISBN (Electronic)9782759890644
Publication statusPublished - 2019 Jun 25
Publication categoryResearch
Peer-reviewedYes
Event7th International Symposium on Deformation Characteristics of Geomaterials, IS-Glasgow 2019 - Glasgow, United Kingdom
Duration: 2019 Jun 262019 Jun 28

Publication series

NameE3S Web of Conferences
PublisherEDP Sciences
Volume92
ISSN (Electronic)2267-1242

Conference

Conference7th International Symposium on Deformation Characteristics of Geomaterials, IS-Glasgow 2019
CountryUnited Kingdom
CityGlasgow
Period2019/06/262019/06/28