1 pressures in the Callovo-Oxfordian Claystone 2 3 M. Mohajerani, P. Delage, J. Sulem, M. Monfared, A.M. Tang, B. Gatmiri 4 5 1. Ecole des Ponts ParisTech, UR Navier/CERMES, 6-8 av. B. Pascal, F 77455 Marne la Vallée cdx 2 6 2. ANDRA, Châtenay Malabry 7 8 9 International Journal of Rock Mechanics and Mining Sciences, 2012, vol. 52, 112-121, 10 doi:10.1016/j.ijrmms.2012.02.012. 11 12 13 Abstract...

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ABSTRACT: Extreme swelling pressures (in excess of 5 MPa) were measured against the invert of a tunnel excavated by drill and blast method in a hard claystone containing variable proportions of anhydrite and gypsum dispersed in the clay matrix. When the invert was not present, floor heave reached displacements in excess of 60 cm in some cross sections. Displacements and pressures developed at a...

This paper investigates the swelling mechanism of Callovo-Oxfordian (COx) claystone grain in its mixtures with bentonite which are potential candidate for engineered barriers French high-level radioactive waste disposal. The pressures MX80 bentonite/COx various fractions and dry densities were first experimentally determined by carrying out infiltration tests under constant-volume conditions. A...

The Akinbo Formation comprises a sequence of mostly dark, pale-greenish grey, laminated shale, slightly glauconitic shale, sandy shale with subordinate claystone lenses. Selected subsurface samples of the shaly facies as penetrated by Akinside 1582 well in eastern Dahomey basin. were investigated by sedimentological. mineralogical and geochemical parameters to ascertain the hydrocarbon potentia...

Abstract The study attempts to address the knowledge gap in Bredasdorp Basin Offshore South Africa by using newly acquired seismic data with an enhanced resolution, integrating core and well log provide a solution. main objective of this was volumetric sandstone reservoir characterization 13At1 10At1 sandstones deposited upper shallow marine environment. results reveal four facies grouped as 1(...

The paper describes the performance, observations and numerical interpretation of a full-scale in situ heating test conducted on Callovo-Oxfordian (COx) claystone Meuse / Haute-Marne (MHM) Underground Research Laboratory (URL) simulating heat-emitting, high-level radioactive waste disposal concept. In experiment, five heaters 3 m-long are placed axis microtunnel excavated COx to simulate heat p...