TY - GEN
T1 - Very slow creep tests on rock samples
AU - Bérest, P.
AU - Béraud, J. F.
AU - Bourcier, M.
AU - Dimanov, A.
AU - Gharbi, H.
AU - Brouard, B.
AU - DeVries, K.
AU - Tribout, D.
PY - 2012/4/23
Y1 - 2012/4/23
N2 - Twelve years ago, creep tests at very low deviatoric stress were performed on an Etrez salt sample in the Varangeville Mine. Recently, a new testing campaign was performed on various salt samples to gain further insight on salt behavior. Creep tests are performed under a 0.1 MPa uniaxial loading on rock-salt samples from the Varangeville and Avery Island Mines and under a 0.24 MPa uniaxial loading on a crushed-salt sample. To minimize the effects of temperature variations, testing devices were placed in an underground mine room, where temperature fluctuations are of the order of one-hundredth of a degree Celsius. The mechanical loading is provided by dead weights. The deformations were measured through special displacement sensors with a resolution of 1/80 μm. A typical steady-state strain rate reached after 6 months is -2.4 ×10 -12 s -1. The influence of air hygrometry, which is approximately 74% RH in the mine, is smaller than expected.
AB - Twelve years ago, creep tests at very low deviatoric stress were performed on an Etrez salt sample in the Varangeville Mine. Recently, a new testing campaign was performed on various salt samples to gain further insight on salt behavior. Creep tests are performed under a 0.1 MPa uniaxial loading on rock-salt samples from the Varangeville and Avery Island Mines and under a 0.24 MPa uniaxial loading on a crushed-salt sample. To minimize the effects of temperature variations, testing devices were placed in an underground mine room, where temperature fluctuations are of the order of one-hundredth of a degree Celsius. The mechanical loading is provided by dead weights. The deformations were measured through special displacement sensors with a resolution of 1/80 μm. A typical steady-state strain rate reached after 6 months is -2.4 ×10 -12 s -1. The influence of air hygrometry, which is approximately 74% RH in the mine, is smaller than expected.
M3 - Conference contribution
AN - SCOPUS:84859858199
SN - 9780415621229
T3 - Mechanical Behavior of Salt VII - Proceedings of the 7th Conference on the Mechanical Behavior of Salt
SP - 81
EP - 88
BT - Mechanical Behavior of Salt VII - Proceedings of the 7th Conference on the Mechanical Behavior of Salt
T2 - 7th Conference on the Mechanical Behavior of Salt, Saltmech7
Y2 - 16 April 2012 through 19 April 2012
ER -