An experimental and constitutive investigation on the chemo-mechanical behaviour of a clay

Alessio Ferrari, Alessio Ferrari, Witteveen, Laloui

Risultato della ricerca: Book/Film/Article reviewpeer review

55 Citazioni (Scopus)

Abstract

Engineering issues for which the understanding of the chemo-mechanical behaviour of soils is relevant include wellbore stability problems, the salinification of groundwater, and nuclear waste storage. However, despite the vast number of situations in which couplings between chemistry and mechanics occur, the available constitutive models rely on limited experimental evidence. This paper presents the results of an experimental programme on the chemo-mechanical behaviour of a non-swelling illite. The osmotic suction is controlled through the ion concentration of sodium chloride in the pore water. Stress paths include mechanical loading at a constant osmotic suction, and an increasing osmotic suction at a constant mechanical stress. The experimental results point out a correlation between the osmotic suction and initial oedometric modulus, as well as between the osmotic suction and yield stress. A constitutive framework for soils is extended to take the observed chemo-mechanical couplings into account. The numerical model has been calibrated for the illite using the parameters obtained through the tests under mechanical loading at a constant concentration, and validated using more elaborate stress paths. The presented experimental and constitutive investigation builds a basis for the assessment of engineering issues in which pore liquid chemistry plays a major role. © 2013 Thomas Telford Ltd.
Lingua originaleEnglish
pagine (da-a)244-255
Numero di pagine12
RivistaGeotechnique
Volume63
Stato di pubblicazionePublished - 2013

All Science Journal Classification (ASJC) codes

  • ???subjectarea.asjc.1900.1909???
  • ???subjectarea.asjc.1900.1901???

Fingerprint

Entra nei temi di ricerca di 'An experimental and constitutive investigation on the chemo-mechanical behaviour of a clay'. Insieme formano una fingerprint unica.

Cita questo