Stress-Dilatancy of Rounded and Angular Rockfill Materials

World Multidisciplinary Earth Sciences Symposium

Dolzyk-Szypcio, Katarzyna^1

Bialystok University of Technology, Faculty of Civil and Environmental Engineering, Wiejska 45E, Bialystok

15-351, Poland^1

关键词: Double effects;    Large-scale triaxial tests;    Mineralogical compositions;    Particle breakage;    Particle grading;    Rock fill materials;    Stress dilatancies;    Stress strain behaviours;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/221/1/012013/pdf
DOI  :  10.1088/1755-1315/221/1/012013

来源: IOP

【 摘 要 】

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 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.