Drained and undrained behavior of an aeolian sand from Natal, Brazil

The behavior of sands subjected to diverse loading conditions has been the object of many studies in recent decades. Constitutive models that are able to simulate the behavior of sands have been developed based on critical state theory. Researchers have shown that the defining parameters of the cri...

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Principais autores:	Souza Júnior, Paulo Leite de, Santos Júnior, Olavo Francisco dos, Fontoura, Tahyara Barbalho, Freitas Neto, Osvaldo de
Formato:	article
Idioma:	English
Publicado em:	Brazilian Association for Soil Mechanics and Geotechnical Engineering
Assuntos:	Steady state Triaxial test critical friction angle Critical state Dune sand Loose sand
Endereço do item:	https://repositorio.ufrn.br/handle/123456789/30534
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spelling	ri-123456789-305342020-11-15T08:07:02Z Drained and undrained behavior of an aeolian sand from Natal, Brazil Souza Júnior, Paulo Leite de Santos Júnior, Olavo Francisco dos Fontoura, Tahyara Barbalho Freitas Neto, Osvaldo de Steady state Triaxial test critical friction angle Critical state Dune sand Loose sand The behavior of sands subjected to diverse loading conditions has been the object of many studies in recent decades. Constitutive models that are able to simulate the behavior of sands have been developed based on critical state theory. Researchers have shown that the defining parameters of the critical state line (CSL) can be obtained by performing drained and undrained tests on samples with different initial densities. This work aims to verify the drained and undrained behavior of aeolian sand from Natal, Brazil, based on critical state soil mechanics. Drained and undrained tests were performed on samples with initial void ratios equal to 0.7 and 0.8, which correspond to loose and medium-dense relative densities, respectively. Samples with both void ratios were subjected to confining stresses equal to 50, 100, 200 and 300 kPa. The results show that the critical state line can be defined from the drained and undrained tests performed on samples with loose and medium-dense initial relative densities. The parameters from the critical state theory were obtained using projections on the planes p’- q and lnp’ - v. The critical state friction angle is equal to 31.5°, and it is compatible with clean and uniformly graded sands with angular to subangular features and composed mostly of quartz. The obtained M, and values are equal to 1.26, 1.863 and 0.03, respectively. The obtained parameters will be used in analyses and numerical simulations of the geotechnical structures built on aeolian dune deposits from the city of Natal, Brazil 2020-11-09T17:42:34Z 2020-11-09T17:42:34Z 2020-06 article SOUZA JUNIOR, P. L.; SANTOS JÚNIOR, O. F.; FONTOURA, T. B. ; FREITAS NETO, O. . Drained and Undrained Behavior of an Aeolian Sand from Natal, Brazil. Soils and Rocks, v. 43, p. 263-270, 2020. Disponível em: https://www.soilsandrocks.com/site/. Acesso em: 27 out. 2020. DOI: 10.28927/SR.432263 https://repositorio.ufrn.br/handle/123456789/30534 10.28927/SR.432263 en application/pdf Brazilian Association for Soil Mechanics and Geotechnical Engineering
institution	Repositório Institucional
collection	RI - UFRN
language	English
topic	Steady state Triaxial test critical friction angle Critical state Dune sand Loose sand
spellingShingle	Steady state Triaxial test critical friction angle Critical state Dune sand Loose sand Souza Júnior, Paulo Leite de Santos Júnior, Olavo Francisco dos Fontoura, Tahyara Barbalho Freitas Neto, Osvaldo de Drained and undrained behavior of an aeolian sand from Natal, Brazil
description	The behavior of sands subjected to diverse loading conditions has been the object of many studies in recent decades. Constitutive models that are able to simulate the behavior of sands have been developed based on critical state theory. Researchers have shown that the defining parameters of the critical state line (CSL) can be obtained by performing drained and undrained tests on samples with different initial densities. This work aims to verify the drained and undrained behavior of aeolian sand from Natal, Brazil, based on critical state soil mechanics. Drained and undrained tests were performed on samples with initial void ratios equal to 0.7 and 0.8, which correspond to loose and medium-dense relative densities, respectively. Samples with both void ratios were subjected to confining stresses equal to 50, 100, 200 and 300 kPa. The results show that the critical state line can be defined from the drained and undrained tests performed on samples with loose and medium-dense initial relative densities. The parameters from the critical state theory were obtained using projections on the planes p’- q and lnp’ - v. The critical state friction angle is equal to 31.5°, and it is compatible with clean and uniformly graded sands with angular to subangular features and composed mostly of quartz. The obtained M, and values are equal to 1.26, 1.863 and 0.03, respectively. The obtained parameters will be used in analyses and numerical simulations of the geotechnical structures built on aeolian dune deposits from the city of Natal, Brazil
format	article
author	Souza Júnior, Paulo Leite de Santos Júnior, Olavo Francisco dos Fontoura, Tahyara Barbalho Freitas Neto, Osvaldo de
author_facet	Souza Júnior, Paulo Leite de Santos Júnior, Olavo Francisco dos Fontoura, Tahyara Barbalho Freitas Neto, Osvaldo de
author_sort	Souza Júnior, Paulo Leite de
title	Drained and undrained behavior of an aeolian sand from Natal, Brazil
title_short	Drained and undrained behavior of an aeolian sand from Natal, Brazil
title_full	Drained and undrained behavior of an aeolian sand from Natal, Brazil
title_fullStr	Drained and undrained behavior of an aeolian sand from Natal, Brazil
title_full_unstemmed	Drained and undrained behavior of an aeolian sand from Natal, Brazil
title_sort	drained and undrained behavior of an aeolian sand from natal, brazil
publisher	Brazilian Association for Soil Mechanics and Geotechnical Engineering
publishDate	2020
url	https://repositorio.ufrn.br/handle/123456789/30534
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Drained and undrained behavior of an aeolian sand from Natal, Brazil

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