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Modulus-suction-moisture relationship for compacted soils in postcompaction state / A. Sawangsuriya in Journal of geotechnical and geoenvironmental engineering, Vol. 135 N° 10 (Octobre 2009) 

Public ISBD [article]  in Journal of geotechnical and geoenvironmental engineering > Vol. 135 N° 10 (Octobre 2009) . - pp. 1390–1403 Titre : Modulus-suction-moisture relationship for compacted soils in postcompaction state Type de document : texte imprimé Auteurs : A. Sawangsuriya, Auteur ; T. B. Edil, Auteur ; P. J. Bosscher, Auteur Année de publication : 2009 Article en page(s) : pp. 1390–1403 Note générale : Geotechnical and geoenvironmental engineering Langues : Anglais (eng) Mots-clés : StiffnessSuctionSoil  compactionMoistureSoil  waterShear  wavesShear  modulusCompacted  soilsUnsaturated  soils Résumé : Despite clear evidence, changes in mechanical properties (i.e., stiffness or modulus) of compacted subgrades in response to subgrade moisture regime changes after construction have rarely been investigated in the geotechnical profession. In particular, when in-service assessment of pavement subgrade is made, the modulus-moisture variation should be addressed on the basis of unsaturated soil mechanics. This study presents the unsaturated small-strain modulus behavior of five predominately fine-grained compacted subgrade soils. The small-strain shear modulus (Go) of saturated compacted specimens subjected to a desorption soil-water characteristic curve (SWCC) was evaluated using bender elements. A test apparatus was designed to apply two stress state variables, the net confining pressure and matric suction, during the Go measurements. The relationship between Go and the SWCC under a constant mean net stress was developed. Additionally, the effect of compaction moisture content, compaction energy, and soil type on the Go -SWCC relationship was investigated. Finally, a relationship describing the small-strain modulus behavior of unsaturated compacted soils is proposed. En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29GT.1943-5606.0000108 [article] Modulus-suction-moisture relationship for compacted soils in postcompaction state [texte imprimé] / A. Sawangsuriya, Auteur ; T. B. Edil, Auteur ; P. J. Bosscher, Auteur . - 2009 . - pp. 1390–1403. Geotechnical and geoenvironmental engineering Langues : Anglais (eng) in Journal of geotechnical and geoenvironmental engineering > Vol. 135 N° 10 (Octobre 2009) . - pp. 1390–1403 Mots-clés : StiffnessSuctionSoil  compactionMoistureSoil  waterShear  wavesShear  modulusCompacted  soilsUnsaturated  soils Résumé : Despite clear evidence, changes in mechanical properties (i.e., stiffness or modulus) of compacted subgrades in response to subgrade moisture regime changes after construction have rarely been investigated in the geotechnical profession. In particular, when in-service assessment of pavement subgrade is made, the modulus-moisture variation should be addressed on the basis of unsaturated soil mechanics. This study presents the unsaturated small-strain modulus behavior of five predominately fine-grained compacted subgrade soils. The small-strain shear modulus (Go) of saturated compacted specimens subjected to a desorption soil-water characteristic curve (SWCC) was evaluated using bender elements. A test apparatus was designed to apply two stress state variables, the net confining pressure and matric suction, during the Go measurements. The relationship between Go and the SWCC under a constant mean net stress was developed. Additionally, the effect of compaction moisture content, compaction energy, and soil type on the Go -SWCC relationship was investigated. Finally, a relationship describing the small-strain modulus behavior of unsaturated compacted soils is proposed. En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29GT.1943-5606.0000108