In soil stabilisation, the use of alternative products to lime or cement has been proposed. However, the effects of these additives, of various origins, on soil behaviour and stabilizing mechanisms are not well understood. Thus, the aim of this paper is to characterize the modification of the mechanical behaviour and microstructure of two soils after treatment with one of those product, a vinyl based copolymer. After treatment, both materials were compacted up to their maximum dry density. The mechanical behaviour of the materials as a function of the curing conditions, suction and water content was first determined. In a second step, the alteration of the microstructure by the treatment product was assessed. The results showed that the treatment permitted to significantly improve the strength of the tested soils. Moreover, the efficiency of the product increases when the soil is dried. However, the Young modulus is not significantly modified by the treatment. Microstructural reorganization after co-polymer addition has been detected by SEM technique for kaolin samples, whereas no modification have been observed for silt samples.

Mechanical properties and microstructure of soils treated with a vinyl-based copolymer / Cuisinier, Olivier; Sezer, Alper; Graziano, SOSSIO FABIO; Russo, Giacomo. - (2020). (Intervento presentato al convegno E-UNSAT2020 - Unsaturated Horizons 4TH EUROPEAN CONFERENCE ON UNSATURATED SOILS tenutosi a Lisbona nel 24-26 Giugno 2020).

Mechanical properties and microstructure of soils treated with a vinyl-based copolymer

Sossio Fabio Graziano;Giacomo Russo
2020

Abstract

In soil stabilisation, the use of alternative products to lime or cement has been proposed. However, the effects of these additives, of various origins, on soil behaviour and stabilizing mechanisms are not well understood. Thus, the aim of this paper is to characterize the modification of the mechanical behaviour and microstructure of two soils after treatment with one of those product, a vinyl based copolymer. After treatment, both materials were compacted up to their maximum dry density. The mechanical behaviour of the materials as a function of the curing conditions, suction and water content was first determined. In a second step, the alteration of the microstructure by the treatment product was assessed. The results showed that the treatment permitted to significantly improve the strength of the tested soils. Moreover, the efficiency of the product increases when the soil is dried. However, the Young modulus is not significantly modified by the treatment. Microstructural reorganization after co-polymer addition has been detected by SEM technique for kaolin samples, whereas no modification have been observed for silt samples.
2020
Mechanical properties and microstructure of soils treated with a vinyl-based copolymer / Cuisinier, Olivier; Sezer, Alper; Graziano, SOSSIO FABIO; Russo, Giacomo. - (2020). (Intervento presentato al convegno E-UNSAT2020 - Unsaturated Horizons 4TH EUROPEAN CONFERENCE ON UNSATURATED SOILS tenutosi a Lisbona nel 24-26 Giugno 2020).
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/778884
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