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| Pértile,Patricia; Reichert,José Miguel; Gubiani,Paulo Ivonir; Holthusen,Dörthe; Costa,André da. |
| ABSTRACT Rheological parameters have been used to study the interaction between particles and the structural strength of soils subjected to mechanical stresses, in which soil composition and water content most strongly affect soil resistance to deformation. Our objective was to evaluate the effect of water tension on rheological parameters of soils with different mineralogical, physical, and chemical composition. Surface and subsurface horizons of four Oxisols, two Ultisols, one Alfisol, and one Vertisol were physically and chemically characterized; their rheological parameters were obtained from amplitude sweep tests under oscillatory shear on disturbed soil samples that were saturated and subjected to water tension of 1, 3, 6, and 10 kPa. In these... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil mechanics; Rheometry; Cohesion; Water content; Capillary forces. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100411 |
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| Pértile,Patricia; Holthusen,Dörthe; Gubiani,Paulo Ivonir; Reichert,José Miguel. |
| ABSTRACT: The structural strength of soils has been extensively described by physical and mechanical properties evaluated on the mesoscale for different soils and management conditions. However, changes in the organization of the soil matrix at the microstructural level, which can be obtained by rheometry, are still seldom used in soil mechanics. Our aim was to use the amplitude sweep test, a rheometry technique, to investigate the microstructural strength of four subtropical soils (two Oxisols, an Ultisol and a Vertisol) and to discuss difficulties with respect to the samples, water content, soil density and vertical force. The various rheological properties which reveal the soil microstructural strength were determined: deformation at the end of the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil mechanics; Oscillatory shear; Amplitude sweep test; Soil structure. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162018000200154 |
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