Documents disponibles écrits par cet auteur

Fundamental parameters for the stiffness and strength control of artificially cemented sand / Nilo Cesar Consoli in Journal of geotechnical and geoenvironmental engineering, Vol. 135 N° 9 (Septembre 2009) 

Public ISBD [article]  in Journal of geotechnical and geoenvironmental engineering > Vol. 135 N° 9 (Septembre 2009) . - pp. 1347–1353 Titre : Fundamental parameters for the stiffness and strength control of artificially cemented sand Type de document : texte imprimé Auteurs : Nilo Cesar Consoli, Auteur ; António Viana Da Fonseca, Auteur ; Rodrigo Caberlon Cruz, Auteur Année de publication : 2009 Article en page(s) : pp. 1347–1353 Note générale : Geotechnical and geoenvironmental engineering Langues : Anglais (eng) Mots-clés : CementsCompression  testsTriaxial  testsSoil  compactionSubgradesRailroad  tracks Résumé : The treatment of soils with cement is an attractive technique when the project requires improvement of the local soil for the construction of subgrades for rail tracks, as a support layer for shallow foundations and to prevent sand liquefaction. As reported by Consoli et al. in 2007, a unique dosage methodology has been established based on rational criteria where the voids/cement ratio plays a fundamental role in the assessment of the target unconfined compressive strength. The present study broadened the research carried out by Consoli et al. in 2007 through quantifying quantifies the influence of voids/cement ratio on the initial shear modulus (G0) and Mohr-Coulomb effective strength parameters (c′,ϕ′) of an artificially cemented sand. A number of unconfined compression and triaxial compression tests with bender elements measurements were carried out. It was shown that the void/cement ratio defined as the ratio between the volume of voids of the compacted mixture and the volume of cement is an appropriate parameter to assess both initial stiffness and effective strength of the sand-cement mixture studied. En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29GT.1943-5606.0000008 [article] Fundamental parameters for the stiffness and strength control of artificially cemented sand [texte imprimé] / Nilo Cesar Consoli, Auteur ; António Viana Da Fonseca, Auteur ; Rodrigo Caberlon Cruz, Auteur . - 2009 . - pp. 1347–1353. Geotechnical and geoenvironmental engineering Langues : Anglais (eng) in Journal of geotechnical and geoenvironmental engineering > Vol. 135 N° 9 (Septembre 2009) . - pp. 1347–1353 Mots-clés : CementsCompression  testsTriaxial  testsSoil  compactionSubgradesRailroad  tracks Résumé : The treatment of soils with cement is an attractive technique when the project requires improvement of the local soil for the construction of subgrades for rail tracks, as a support layer for shallow foundations and to prevent sand liquefaction. As reported by Consoli et al. in 2007, a unique dosage methodology has been established based on rational criteria where the voids/cement ratio plays a fundamental role in the assessment of the target unconfined compressive strength. The present study broadened the research carried out by Consoli et al. in 2007 through quantifying quantifies the influence of voids/cement ratio on the initial shear modulus (G0) and Mohr-Coulomb effective strength parameters (c′,ϕ′) of an artificially cemented sand. A number of unconfined compression and triaxial compression tests with bender elements measurements were carried out. It was shown that the void/cement ratio defined as the ratio between the volume of voids of the compacted mixture and the volume of cement is an appropriate parameter to assess both initial stiffness and effective strength of the sand-cement mixture studied. En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29GT.1943-5606.0000008

Influence of cement-voids ratio on stress-dilatancy behavior of artificially cemented sand / Nilo Cesar Consoli in Journal of geotechnical and geoenvironmental engineering, Vol. 138 N° 1 (Janvier 2012) 

Public ISBD [article]  in Journal of geotechnical and geoenvironmental engineering > Vol. 138 N° 1 (Janvier 2012) . - pp. 100-109 Titre : Influence of cement-voids ratio on stress-dilatancy behavior of artificially cemented sand Type de document : texte imprimé Auteurs : Nilo Cesar Consoli, Auteur ; Rodrigo Caberlon Cruz, Auteur ; António Viana Da Fonseca, Auteur Année de publication : 2012 Article en page(s) : pp. 100-109 Note générale : Géotechnique Langues : Anglais (eng) Mots-clés : Stress-dilatancy  Cement-voids  ratio  Triaxial  tests  Soil-cement Résumé : The addition of cement is an interesting remediation technique when the project requires improvement of the local soil for the construction of pavement base layers, in slope protection of earth dams and canal linings, as a support layer for shallow foundations and to prevent sand liquefaction. The present study was carried out to quantify the influence of the amount of cement and the porosity in a cement-voids ratio, defined as the ratio between the volume of cement and the volume of voids of a mixture, on the stress-dilatancy behavior of an artificially cemented sand. A program of triaxial compression tests considering three distinct cement-voids ratios was carried out with two combinations of volumes of voids and volumes of cement at each cement-voids ratio. Results showed that the stress-dilatancy relationship is alike for a given cement-voids ratio and that the stress-strain behavior is also similar. The cement-voids ratio is therefore an appropriate parameter to assess stress-dilatancy of the sand-cement mixture studied. DEWEY : 624.1 ISSN : 1090-0241 En ligne : http://ascelibrary.org/gto/resource/1/jggefk/v138/i1/p100_s1?isAuthorized=no [article] Influence of cement-voids ratio on stress-dilatancy behavior of artificially cemented sand [texte imprimé] / Nilo Cesar Consoli, Auteur ; Rodrigo Caberlon Cruz, Auteur ; António Viana Da Fonseca, Auteur . - 2012 . - pp. 100-109. Géotechnique Langues : Anglais (eng) in Journal of geotechnical and geoenvironmental engineering > Vol. 138 N° 1 (Janvier 2012) . - pp. 100-109 Mots-clés : Stress-dilatancy  Cement-voids  ratio  Triaxial  tests  Soil-cement Résumé : The addition of cement is an interesting remediation technique when the project requires improvement of the local soil for the construction of pavement base layers, in slope protection of earth dams and canal linings, as a support layer for shallow foundations and to prevent sand liquefaction. The present study was carried out to quantify the influence of the amount of cement and the porosity in a cement-voids ratio, defined as the ratio between the volume of cement and the volume of voids of a mixture, on the stress-dilatancy behavior of an artificially cemented sand. A program of triaxial compression tests considering three distinct cement-voids ratios was carried out with two combinations of volumes of voids and volumes of cement at each cement-voids ratio. Results showed that the stress-dilatancy relationship is alike for a given cement-voids ratio and that the stress-strain behavior is also similar. The cement-voids ratio is therefore an appropriate parameter to assess stress-dilatancy of the sand-cement mixture studied. DEWEY : 624.1 ISSN : 1090-0241 En ligne : http://ascelibrary.org/gto/resource/1/jggefk/v138/i1/p100_s1?isAuthorized=no

Parameters controlling tensile and compressive strength of artificially cemented sand / Nilo Cesar Consoli in Journal of geotechnical and geoenvironmental engineering, Vol. 136 N° 5 (Mai 2010) 

Public ISBD [article]  in Journal of geotechnical and geoenvironmental engineering > Vol. 136 N° 5 (Mai 2010) . - pp. 759-763 Titre : Parameters controlling tensile and compressive strength of artificially cemented sand Type de document : texte imprimé Auteurs : Nilo Cesar Consoli, Auteur ; Rodrigo Caberlon Cruz, Auteur ; Márcio Felipe Floss, Auteur Année de publication : 2010 Article en page(s) : pp. 759-763 Note générale : Géotechnique Langues : Anglais (eng) Mots-clés : Tensile  strength  Compressive  strength  Soil  cement  Compacted  soils Index. décimale : 624.1 Infrastructures.Ouvrages en terre. Fondations. Tunnels Résumé : The enhancement of local soils with cement for the construction of stabilized pavement bases, canal lining, and support layer for shallow foundations shows great economical and environmental advantages, avoiding the use of borrow materials from elsewhere, as well as the need of a spoil area. The present research aims to quantify the influence of the amount of cement, the porosity, and the voids/cement ratio in the assessment of unconfined compressive strength (qu) and splitting tensile strength (qt) of an artificially cemented sand, as well as in the evaluation of qt/qu relationship. A program of splitting tensile tests and unconfined compression tests considering three distinct voids ratio and seven cement contents, varying from 1 to 12%, was carried out in the present study. The results show that a power function adapts well qt and qu values with increasing cement content and with reducing porosity of the compacted mixture. The voids/cement ratio is demonstrated to be an appropriate parameter to assess both qt and qu of the sand-cement mixture studied. Finally, the qt/qu relationship is unique for the sand-cement studied, being independent of the voids/cement ratio. DEWEY : 624.1 ISSN : 1090-0241 En ligne : http://ascelibrary.org/gto/resource/1/jggefk/v136/i5/p759_s1?isAuthorized=no [article] Parameters controlling tensile and compressive strength of artificially cemented sand [texte imprimé] / Nilo Cesar Consoli, Auteur ; Rodrigo Caberlon Cruz, Auteur ; Márcio Felipe Floss, Auteur . - 2010 . - pp. 759-763. Géotechnique Langues : Anglais (eng) in Journal of geotechnical and geoenvironmental engineering > Vol. 136 N° 5 (Mai 2010) . - pp. 759-763 Mots-clés : Tensile  strength  Compressive  strength  Soil  cement  Compacted  soils Index. décimale : 624.1 Infrastructures.Ouvrages en terre. Fondations. Tunnels Résumé : The enhancement of local soils with cement for the construction of stabilized pavement bases, canal lining, and support layer for shallow foundations shows great economical and environmental advantages, avoiding the use of borrow materials from elsewhere, as well as the need of a spoil area. The present research aims to quantify the influence of the amount of cement, the porosity, and the voids/cement ratio in the assessment of unconfined compressive strength (qu) and splitting tensile strength (qt) of an artificially cemented sand, as well as in the evaluation of qt/qu relationship. A program of splitting tensile tests and unconfined compression tests considering three distinct voids ratio and seven cement contents, varying from 1 to 12%, was carried out in the present study. The results show that a power function adapts well qt and qu values with increasing cement content and with reducing porosity of the compacted mixture. The voids/cement ratio is demonstrated to be an appropriate parameter to assess both qt and qu of the sand-cement mixture studied. Finally, the qt/qu relationship is unique for the sand-cement studied, being independent of the voids/cement ratio. DEWEY : 624.1 ISSN : 1090-0241 En ligne : http://ascelibrary.org/gto/resource/1/jggefk/v136/i5/p759_s1?isAuthorized=no