Mostrar el registro sencillo del ítem
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/#
Archivos asociados