Chemo-mechanical modelling of lime treated soils

Abstract : Lime treatment has been widely used to improve mechanical properties of soils. However, less has been done to account for the effect of the treatment on constitutive relationships. In this study, a comprehensive programme of isotropic consolidation tests and drained triaxial experiments were designed and carried out on saturated specimens of a silt treated with quicklime. The chemical composition in hydrates, portlandite, and carbonates was determined using thermogravimetric analysis and differential thermal analysis. The modifications to the mechanical parameters of the soil were evaluated in the framework of the Cam Clay elastoplastic model. The experimental results revealed that the addition of lime leads to the modification of the critical state. For concentrations in lime higher than 1%, the treated specimens displayed a different normal compression line compared to the untreated state. Chemical analysis revealed the production of cementitious compounds for every concentration tested. A constitutive model was proposed to describe the observed behaviour of lime treated soils in the framework of the Structured Cam Clay. The model accounts for the modifications on the mechanical parameters of the soil. A chemo-mechanical coupling was established between the yield stress and the mass concentration in cementitious compounds.
Keywords : Quicklime
Type de document :
Article dans une revue
Applied Clay Science, Elsevier, 2014, 95, pp.211 - 219. 〈10.1016/j.clay.2014.04.015〉
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https://hal.univ-lorraine.fr/hal-01418282
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Soumis le : vendredi 16 décembre 2016 - 15:24:52
Dernière modification le : jeudi 29 mars 2018 - 14:52:05

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Vincent Robin, Olivier Cuisinier, Farimah Masrouri, A.A. Javadi. Chemo-mechanical modelling of lime treated soils. Applied Clay Science, Elsevier, 2014, 95, pp.211 - 219. 〈10.1016/j.clay.2014.04.015〉. 〈hal-01418282〉

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