Numerical simulation of geosynthetic clay liner desiccation under high thermal gradients and low overburden stress

Ali Ghavam-Nasiri; Abbas El-Zein; David Airey; R. Kerry Rowe; Abdelmalek Bouazza

doi:10.1061/(ASCE)GM.1943-5622.0001425

Numerical simulation of geosynthetic clay liner desiccation under high thermal gradients and low overburden stress

Ali Ghavam-Nasiri, Abbas El-Zein, David Airey, R. Kerry Rowe, Abdelmalek Bouazza

Civil Engineering

Research output: Contribution to journal › Article › Research › peer-review

7 Citations (Scopus)

Abstract

A multiphase, thermohydro-mechanical model of unsaturated soils is presented to assess the risk of desiccation of a geosynthetic clay liner (GCL) in a composite lining system (i.e., a high-density polyethylene geomembrane over a geosynthetic clay liner) under conditions encountered in brine or solar ponds, where temperatures can reach up to 95°C and the geosynthetic clay liner is subject to low effective stress. The model considers void ratio and temperature-dependent soil-water characteristic curves (SWCCs) for needle-punched GCLs. The model was validated against results from experimental column studies.

Original language	English
Article number	04019069
Number of pages	20
Journal	International Journal of Geomechanics
Volume	19
Issue number	7
DOIs	https://doi.org/10.1061/(ASCE)GM.1943-5622.0001425
Publication status	Published - 1 Jul 2019

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10.1061/(ASCE)GM.1943-5622.0001425

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Cite this

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title = "Numerical simulation of geosynthetic clay liner desiccation under high thermal gradients and low overburden stress",

abstract = "A multiphase, thermohydro-mechanical model of unsaturated soils is presented to assess the risk of desiccation of a geosynthetic clay liner (GCL) in a composite lining system (i.e., a high-density polyethylene geomembrane over a geosynthetic clay liner) under conditions encountered in brine or solar ponds, where temperatures can reach up to 95°C and the geosynthetic clay liner is subject to low effective stress. The model considers void ratio and temperature-dependent soil-water characteristic curves (SWCCs) for needle-punched GCLs. The model was validated against results from experimental column studies.",

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AU - Bouazza, Abdelmalek

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AB - A multiphase, thermohydro-mechanical model of unsaturated soils is presented to assess the risk of desiccation of a geosynthetic clay liner (GCL) in a composite lining system (i.e., a high-density polyethylene geomembrane over a geosynthetic clay liner) under conditions encountered in brine or solar ponds, where temperatures can reach up to 95°C and the geosynthetic clay liner is subject to low effective stress. The model considers void ratio and temperature-dependent soil-water characteristic curves (SWCCs) for needle-punched GCLs. The model was validated against results from experimental column studies.

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