Journal
APPLIED CLAY SCIENCE
Volume 114, Issue -, Pages 491-496Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.clay.2015.06.039
Keywords
Creep test; Time-dependent behavior; Anisotropic creep; Argillite; Claystone; Clayey rocks
Funding
- Andra (French National Agency for Management of Radioactive Waste)
Ask authors/readers for more resources
Clayey rocks are extensively investigated in France and other countries as a potential geological barrier for underground disposal of radioactive waste. In this context, it is necessary to study time-dependent deformation of clayey rocks. In this paper, we propose to perform a series of triaxial compressive creep tests on the Callovo-Oxfordian (Cox) argillite from the underground research laboratory of Andra at Bure in France. The main purpose is to investigate effects of deviatoric stress level and structural anisotropy on the creep deformation. To this end, creep tests are performed under different values of deviatoric stress for a same value of confining pressure. On the other hand, tested specimens are drilled respectively in the perpendicular and parallel directions to the bedding planes of the Cox argillite. The experimental results show that the increase of deviatoric stress enhances the creep strain which clearly exhibits an anisotropic behavior. Moreover, it is found that the inelastic creep deformation induces an increase of the long-term compressive strength of the argillite. (C) 2015 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available