The chemical composition of pore fluid and matric suction rule the mechanical behaviour of soils. In case of clays, their fabric changes in line with those variables. Since both the increase in matric suction and salinity cause a transition from an open to a close microstructure of low and medium activity clayey materials, a unique framework could tackle problems where salinity and saturation changes are expected. This paper presents a simple elasto-plastic model capable of reproducing the behaviour of unsaturated clayey soils in saline environments. Changes in the pore fluid composition are addressed through the use of osmotic suction as a variable. The proposed model extends the Barcelona Basic Model for partially saturated soils to consider the effect of osmotic suction. The model, implemented in the Thebes code, is calibrated for Boom Clay. The reproduced tests include mechanical loading at different matric and osmotic suctions in oedometric conditions, as well as more complex chemo-mechanical stress paths. Despite the simplicity of the formulation, the agreement between the experimental results and the simulations is encouraging. It seems that the modelling approach addresses the most important features of partially saturated soils with saline pore fluid which are slightly or moderately expansive.


    Zugriff

    Download


    Exportieren, teilen und zitieren



    Titel :

    Modelling the behaviour of unsaturated non-active clays in saline environment



    Erscheinungsdatum :

    2021-01-01



    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Klassifikation :

    DDC:    629



    Modelling the behaviour of unsaturated non-active clays in saline environment

    Scelsi, Giulia / Ayman, A. Abed / Della Vecchia, Gabriele et al. | BASE | 2021

    Freier Zugriff

    Predicted Behaviour of a Trial Embankment Built to Failure on Malaysian Marine Clays

    Bergado, D. T. / Sampaco, C. L. / Malaysian Highway Authority | British Library Conference Proceedings | 1989


    Evaluation of Chemical Modifiers and Stabilizers for Chemically Active Soils—Clays

    Petry, Thomas M. / Das, Braja | Transportation Research Record | 2001


    Cycling in virtual reality: modelling behaviour in an immersive environment

    Bogacz, Martyna / Hess, Stephane / F. Choudhury, Charisma et al. | Taylor & Francis Verlag | 2021


    Numerical Modelling of Lateral Deformation of the Cantilever Retaining Wall in Expansive Clays

    Sharma, Santosh / Prabhu, N. Vinod / Naveen, Y. et al. | TIBKAT | 2020