Stress-Dilatancy of Rounded and Angular Rockfill Materials

Katarzyna Dołżyk-Szypcio

Abstract

Rockfill materials consist primarily of angular to subangular particles obtained by blasting rock or extracting rounded to sub rounded particles from river bed. The stress-strain (stress-dilatancy) behaviour of rockfill materials is affected by mineralogical composition, particle grading, size and shape of particles and stress level. Particle breakage has an important effect on strength and stress-dilatancy behaviour. Based on a large scale triaxial tests data reported in literature, the stress-dilatancy relationship is analysed using Frictional State Theory. It is shown that stress level significantly influences the stress-dilatancy relationship. The double-effect of particle breakage may be observed: one − the energy consumed for breakage during shear, and the other − the extra contraction caused by breakage. Parameter α of Frictional State Theory represents the energy consumption effect and β represents extra contraction caused by breakage. It is shown that Frictional State Theory can reflect the influence of particle breakage on stress-strain behaviour of rockfill material.
Author Katarzyna Dołżyk-Szypcio (FCEE / DGSM)
Katarzyna Dołżyk-Szypcio,,
- Department of Geotechnics and Structural Mechanics
Journal seriesIOP Conference Series: Earth and Environmental Science, ISSN 1755-1307, e-ISSN 1755-1315, (0 pkt)
Issue year2019
Vol221
Pages1-7
Publication size in sheets0.5
ConferenceWorld Multidisciplinary Earth Sciences Symposium : WMESS'2018, Prague, September 3-7, 2018
DOIDOI:10.1088/1755-1315/221/1/012013
URL https://iopscience.iop.org/article/10.1088/1755-1315/221/1/012013
Internal identifier000045152
Languageen angielski
LicenseJournal (articles only); published final; Uznanie Autorstwa (CC-BY); with publication
Score (nominal)5
Score sourcejournalList
ScoreMinisterial score = 5.0, 14-02-2020, ArticleFromJournal
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