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dc.contributor.authorAlonso Pérez de Agreda, Eduardo
dc.contributor.authorRomero Morales, Enrique Edgar
dc.contributor.authorOrtega, Enrique
dc.contributor.authorChavez, C.
dc.contributor.otherEscola Tècnica Superior d'Enginyeries Industrial i Aeronàutica de Terrassa
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria del Terreny, Cartogràfica i Geofísica
dc.date.accessioned2012-02-17T16:13:29Z
dc.date.available2012-02-17T16:13:29Z
dc.date.created2011
dc.date.issued2011
dc.identifier.citationAlonso, E. E. [et al.]. Yielding of coarse granular aggregates. A: International Conference on Dam Engineering. "6th International Conference on Dam Engineering.". Lisboa: 2011, p. 73-83.
dc.identifier.isbn978-981-08-7896-2
dc.identifier.urihttp://hdl.handle.net/2117/15225
dc.description.abstractYielding of granular aggregates is associated with particle breakage. Breakage depends on the rock toughness, particle geometry, density of aggregate, current grain size distribution, stress intensity and relative humidity. Most of these factors were defined or monitored in a series of suction controlled large diameter triaxial tests performed on two widely different parent rock materials: a quartzitic fissured shale and a very hard limestone. Shale particles had a high aspect ratio and planar shapes. Limestone gravels exhibit low aspect ratios and sharp edges. The paper reviews the experimental technique used and compares the triaxial behaviour of a well graded mixture of both types of parent rock materials. Critical state conditions are reasonably well established for the softer aggregate (shale) but it is absent in the hard limestone. Yielding loci and its dependence on current relative humidity are also given. Dilatancy is shown to depend on a number of factors: stress ratio, strength envelope, accumulated plastic work and suction. Some dilatancy rules are compared and new ones, better adapted to the mechanisms of particle breakage, are proposed. The paper is a contribution towards the development of general constitutive models for granular aggregates.
dc.format.extent11 p.
dc.language.isoeng
dc.subjectÀrees temàtiques de la UPC::Enginyeria civil::Geotècnia::Mecànica de roques
dc.subject.lcshEarth dams--Materials
dc.subject.lcshRock mechanics
dc.subject.othershale
dc.subject.otherlimestone
dc.subject.otherRockfill
dc.subject.otheryield
dc.subject.otherplasticity
dc.subject.otherdilatancy
dc.subject.otherrelative humidity
dc.subject.otherparticle breakage
dc.titleYielding of coarse granular aggregates
dc.typeConference lecture
dc.subject.lemacPreses d'escollera
dc.subject.lemacMecànica de roques
dc.contributor.groupUniversitat Politècnica de Catalunya. MSR - Mecànica del Sòls i de les Roques
dc.relation.publisherversionhttp://sites.google.com/site/6thdamengineeringconference/new/proceedings
dc.rights.accessRestricted access - publisher's policy
drac.iddocument9631576
dc.description.versionPostprint (published version)
upcommons.citation.authorAlonso, E. E.; Romero, E.; Ortega, E.; Chavez, C.
upcommons.citation.contributorInternational Conference on Dam Engineering
upcommons.citation.pubplaceLisboa
upcommons.citation.publishedtrue
upcommons.citation.publicationName6th International Conference on Dam Engineering.
upcommons.citation.startingPage73
upcommons.citation.endingPage83


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