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dc.contributor.author
Cosentino, Diego  
dc.contributor.author
Campos Pecorari, Cecilia  
dc.date.available
2022-01-05T14:52:54Z  
dc.date.issued
2002-12  
dc.identifier.citation
Cosentino, Diego; Campos Pecorari, Cecilia; Limos de baja densidad: impacto sobre el comportamiento físico de los suelos de la región pampeana; Asociación Argentina de la Ciencia del Suelo; Ciencia del Suelo; 20; 1; 12-2002; 9-16  
dc.identifier.issn
0326-3169  
dc.identifier.uri
http://hdl.handle.net/11336/149623  
dc.description.abstract
Phytoliths are hydrated silica bodies that are included in plant tissues. Along with another bioliths and volcanic ashes, phytoliths are the main low-density mineral fraction in soils of the Pampa region. The aim of this work was to determine the impact of low-density minerals in the silt fraction on physical properties related with structural stability and porosity. Mixtures with different low-density minerals and clay content were constructed to determine their tensile strength and swelling – shrinkage capacity. The general trend of tensile strength curves showed that the highest the water content, the lowest the tensile strength. This variable showed significant differences at all water contents but at higher water potential. Mixtures with low percentage of light silt fraction showed the highest tensile strength. Near saturation mixtures didn’t show a well defined crash point. Overall, tensile strength was higher with high clay content, low water content and without low-density minerals. Shrinkage curves were obtained for the same mixtures used for tensile strength tests varying the low-density minerals content. In this case, two types of clay were used: illite and swelling clay. Mixtures with illite behave very rigid. Low-density minerals level didn’t modify the matrix volumetric behaviour. The swelling clay curves showed a normal shrinkage behaviour and a higher slope than the illite curves. Thus, clay type appears to be the main factor affecting volume change with water content. For both clay types, mixtures with higher low-density minerals content showed the highest specific volume values. As a conclusion, the surface layer of the Pergamino soil has a high low-density minerals content, which involves negative effects on its tensile strength and therefore on structural stability.  
dc.format
application/pdf  
dc.language.iso
spa  
dc.publisher
Asociación Argentina de la Ciencia del Suelo  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
LOW-DENSITY MINERALS  
dc.subject
PHYTOLITHS  
dc.subject
PAMPEAN SOILS  
dc.subject
TENSILE STRENGTH  
dc.subject.classification
Ciencias del Suelo  
dc.subject.classification
Agricultura, Silvicultura y Pesca  
dc.subject.classification
CIENCIAS AGRÍCOLAS  
dc.title
Limos de baja densidad: impacto sobre el comportamiento físico de los suelos de la región pampeana  
dc.title
Impact of low-density minerals on soil physical properties of soils of the Pampean region  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2022-01-03T14:03:28Z  
dc.identifier.eissn
1850-2067  
dc.journal.volume
20  
dc.journal.number
1  
dc.journal.pagination
9-16  
dc.journal.pais
Argentina  
dc.journal.ciudad
Ciudad Autónoma de Buenos Aires  
dc.description.fil
Fil: Cosentino, Diego. Universidad de Buenos Aires. Facultad de Agronomía; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina  
dc.description.fil
Fil: Campos Pecorari, Cecilia. Universidad de Buenos Aires. Facultad de Agronomía; Argentina  
dc.journal.title
Ciencia del Suelo  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.suelos.org.ar/publicaciones/vol_20n1/cosentino_9-16.pdf  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.suelos.org.ar/sitio/volumen-20-numero-1-junio-2002/#