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Registro Completo |
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Biblioteca(s): |
Embrapa Semiárido. |
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Data corrente: |
26/10/2018 |
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Data da última atualização: |
14/12/2023 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
BARBOSA, G. M. N.; ASSIS, I. R. de; KER, J. C.; MARQUES, E. A. G.; CUNHA, T. J. F.; SOUZA, L. da S.; VARGAS SOBRINHO, V. |
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Afiliação: |
GUSTAVO MAGALHÃES NUNES BARBOSA, Universidade Federal de Viçosa; IGOR RODRIGUES DE ASSIS, Universidade Federal de Viçosa; JOÃO CARLOS KER, Universidade Federal de Viçosa; EDUARDO ANTÔNIO GOMES MARQUES, Universidade Federal de Viçosa; TONY JARBAS FERREIRA CUNHA, CPATSA; LUCIANO DA SILVA SOUZA, Universidade Federal do Recôncavo Baiano; ULLISSES VARGAS SOBRINHO, Universidade Federal de Viçosa. |
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Título: |
Geotechnical characterization of Vertisols from Bahia State, Brazil. |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
In: WORLD CONGRESS OF SOIL SCIENCE, 21., 2018, Rio de Janeiro. Soil science: beyond food and fuel: proceedings. Rio de Janeiro: SBCS, 2018. |
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Idioma: |
Inglês |
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Conteúdo: |
Despite the existence of vertic soils with predominance of kaolinite is reported around the world, there are few studies shown the influence of this clay mineral in their geotechnical characteristics. The work aimed to perform a geotechnical characterization of Vertisols from Bahia, Brazil, besides understanding the influence of physical, chemical and mineralogical properties on the geotechnical behavior. Three Vertisols were collected in Juazeiro city, in a semi-arid region, one kaolinitic Vertisol and two smectite Vertisols. Other three Vertsols were collected in Recôncavo region, all presented clay mineralogy with codominance of smectite and kaolinite (Sm-K). A geotechnical characterization was carried out in their diagnostic horizons, determining properties such as granulometric curve, clay activity, linear expansion coefficient, compaction capacity, cohesion (c?), and internal friction angle (ϕ) of saturated soils. We observed that the clay content was the attribute that most influenced the geotechnical characteristics. All soils showed expansion potential above 0.01, considered as very high. The kaolinitic Vertisol showed the lowest clay activity. However, the clay content of 68% contributed to this soil to present an expansion potential similar to the smectite Vertisol with clay content of 35%. The major values of soil compaction were observed for the kaolinitic Vertisol, which presented greater reduction of void ratio and higher density as a function of moisture increase. For this soil, the optimal moisture content (OMC) and maximum dry density (MDD) were 22% and 1.65 g cm-3, respectively. The other soils presented OMC between 18-41% and MDD between 1.75-1.24 g cm-3. These smectite-soils, MDD decreased with increasing of OMC. All soils had low c? values, which is expected for high clay content soils. The c? values increased with increasing of kaolinite and decreased with increasing of clay content. The kaolinite Vertisol showed c? of 0.19 kgf cm-2. The c? values to Sm-K Vertisols ranged between 0.05-0.11 kgf cm-2. As for smectite-soil, c? values ranged between 0.02-0.03 kgf cm-2. Low ϕ values were observed for all soils, which indicates low shear resistance. In its turn, ϕ was more influenced by granulometry, in which higher levels of sand and gravel provided higher ϕ, independently of the type of clay. Vertisols with different mineralogy present different geotechnical characteristics. Keywords: Smectite; kaolinite; expansive soils MenosDespite the existence of vertic soils with predominance of kaolinite is reported around the world, there are few studies shown the influence of this clay mineral in their geotechnical characteristics. The work aimed to perform a geotechnical characterization of Vertisols from Bahia, Brazil, besides understanding the influence of physical, chemical and mineralogical properties on the geotechnical behavior. Three Vertisols were collected in Juazeiro city, in a semi-arid region, one kaolinitic Vertisol and two smectite Vertisols. Other three Vertsols were collected in Recôncavo region, all presented clay mineralogy with codominance of smectite and kaolinite (Sm-K). A geotechnical characterization was carried out in their diagnostic horizons, determining properties such as granulometric curve, clay activity, linear expansion coefficient, compaction capacity, cohesion (c?), and internal friction angle (ϕ) of saturated soils. We observed that the clay content was the attribute that most influenced the geotechnical characteristics. All soils showed expansion potential above 0.01, considered as very high. The kaolinitic Vertisol showed the lowest clay activity. However, the clay content of 68% contributed to this soil to present an expansion potential similar to the smectite Vertisol with clay content of 35%. The major values of soil compaction were observed for the kaolinitic Vertisol, which presented greater reduction of void ratio and higher density as a function of moisture... Mostrar Tudo |
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Palavras-Chave: |
Bahia; Caracterização geotécnica; Caulinite; Solos expansivos. |
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Thesagro: |
Solo; Vertissolo. |
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Thesaurus Nal: |
Smectite; Soil. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/185188/1/Tony.pdf
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Marc: |
LEADER 03353nam a2200277 a 4500
001 2098279
005 2023-12-14
008 2018 bl uuuu u00u1 u #d
100 1 $aBARBOSA, G. M. N.
245 $aGeotechnical characterization of Vertisols from Bahia State, Brazil.$h[electronic resource]
260 $aIn: WORLD CONGRESS OF SOIL SCIENCE, 21., 2018, Rio de Janeiro. Soil science: beyond food and fuel: proceedings. Rio de Janeiro: SBCS$c2018
520 $aDespite the existence of vertic soils with predominance of kaolinite is reported around the world, there are few studies shown the influence of this clay mineral in their geotechnical characteristics. The work aimed to perform a geotechnical characterization of Vertisols from Bahia, Brazil, besides understanding the influence of physical, chemical and mineralogical properties on the geotechnical behavior. Three Vertisols were collected in Juazeiro city, in a semi-arid region, one kaolinitic Vertisol and two smectite Vertisols. Other three Vertsols were collected in Recôncavo region, all presented clay mineralogy with codominance of smectite and kaolinite (Sm-K). A geotechnical characterization was carried out in their diagnostic horizons, determining properties such as granulometric curve, clay activity, linear expansion coefficient, compaction capacity, cohesion (c?), and internal friction angle (ϕ) of saturated soils. We observed that the clay content was the attribute that most influenced the geotechnical characteristics. All soils showed expansion potential above 0.01, considered as very high. The kaolinitic Vertisol showed the lowest clay activity. However, the clay content of 68% contributed to this soil to present an expansion potential similar to the smectite Vertisol with clay content of 35%. The major values of soil compaction were observed for the kaolinitic Vertisol, which presented greater reduction of void ratio and higher density as a function of moisture increase. For this soil, the optimal moisture content (OMC) and maximum dry density (MDD) were 22% and 1.65 g cm-3, respectively. The other soils presented OMC between 18-41% and MDD between 1.75-1.24 g cm-3. These smectite-soils, MDD decreased with increasing of OMC. All soils had low c? values, which is expected for high clay content soils. The c? values increased with increasing of kaolinite and decreased with increasing of clay content. The kaolinite Vertisol showed c? of 0.19 kgf cm-2. The c? values to Sm-K Vertisols ranged between 0.05-0.11 kgf cm-2. As for smectite-soil, c? values ranged between 0.02-0.03 kgf cm-2. Low ϕ values were observed for all soils, which indicates low shear resistance. In its turn, ϕ was more influenced by granulometry, in which higher levels of sand and gravel provided higher ϕ, independently of the type of clay. Vertisols with different mineralogy present different geotechnical characteristics. Keywords: Smectite; kaolinite; expansive soils
650 $aSmectite
650 $aSoil
650 $aSolo
650 $aVertissolo
653 $aBahia
653 $aCaracterização geotécnica
653 $aCaulinite
653 $aSolos expansivos
700 1 $aASSIS, I. R. de
700 1 $aKER, J. C.
700 1 $aMARQUES, E. A. G.
700 1 $aCUNHA, T. J. F.
700 1 $aSOUZA, L. da S.
700 1 $aVARGAS SOBRINHO, V.
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Registro original: |
Embrapa Semiárido (CPATSA) |
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Registro Completo
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Biblioteca(s): |
Embrapa Suínos e Aves. |
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Data corrente: |
02/05/2019 |
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Data da última atualização: |
19/08/2019 |
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Tipo da produção científica: |
Autoria/Organização/Edição de Livros |
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Autoria: |
KUNZ, A.; STEINMETZ, R. L. R.; AMARAL, A. C. do (ed.). |
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Afiliação: |
AIRTON KUNZ, CNPSA; RICARDO LUIS RADIS STEINMETZ, CNPSA; ANDRÉ CESTONARO DO AMARAL. |
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Título: |
Fundamentos da digestão anaeróbia, purificação do biogás, uso e tratamento do digestato. |
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Ano de publicação: |
2019 |
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Fonte/Imprenta: |
Concórdia: Sbera: Embrapa Suínos e Aves, 2019. |
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Páginas: |
209 p. |
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ISBN: |
978-85-93823-01-5 |
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Idioma: |
Português |
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Palavras-Chave: |
Biodigesters; Dejeto animal; Digestato; Effluent treatment; Tratamento de efluente. |
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Thesagro: |
Biodigestor; Biogás; Digestão Anaeróbia. |
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Thesaurus NAL: |
Anaerobic digestion; Animal wastes; Effluents; Energy resources. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/197183/1/Livro-Biogas.pdf
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Marc: |
LEADER 00820nam a2200289 a 4500
001 2108617
005 2019-08-19
008 2019 bl uuuu 00u1 u #d
020 $a978-85-93823-01-5
100 1 $aKUNZ, A.
245 $aFundamentos da digestão anaeróbia, purificação do biogás, uso e tratamento do digestato.
260 $aConcórdia: Sbera: Embrapa Suínos e Aves$c2019
300 $a209 p.
650 $aAnaerobic digestion
650 $aAnimal wastes
650 $aEffluents
650 $aEnergy resources
650 $aBiodigestor
650 $aBiogás
650 $aDigestão Anaeróbia
653 $aBiodigesters
653 $aDejeto animal
653 $aDigestato
653 $aEffluent treatment
653 $aTratamento de efluente
700 1 $aSTEINMETZ, R. L. R.
700 1 $aAMARAL, A. C. do
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