Effect of fracture voids on the swelling behaviour of Callovo-Oxfordian claystone
نویسندگان
چکیده
The Callovo-Oxfordian (COx) claystone has been considered as a possible host rock for deep geological repository of high-level radioactive waste in France. When constructing the repository, it is unavoidable to generate fractured zone vicinity excavated walls. In assessment performance, important investigate role fractures on swelling capacity COx and further characterize evolution. this study, effect fracture voids behaviour was investigated by simulating with space created limited amount grains sandwiched between disks, performing series tests oedometer under low vertical stress (0.05 MPa) pressure constant-volume condition. Results showed that, water infiltrating into sample voids, collapsed before disks. whole composed zones corresponding disks higher dry density than expected final value, compression initial lower density. Moreover, axial strain decreased void increased. maximum that might be fully filled (sealing) were found 5.14%–7.65% without considering long-term creep contribution field
منابع مشابه
Oedometric compression and swelling behaviour of the Callovo-Oxfordian argillite
The Callovo-Oxfordian (COx) argillite is a possible host rock for radioactive waste disposal in which the ANDRA underground laboratory of Bure (East of France) has been excavated. In this paper some aspects of the volume change behaviour of the COx argillite are investigated. To do so, high pressure oedometers with a maximum capacity of 113 MPa have been used. In a first stage, swelling tests w...
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ژورنال
عنوان ژورنال: Engineering Geology
سال: 2021
ISSN: ['1872-6917', '0013-7952']
DOI: https://doi.org/10.1016/j.enggeo.2020.105935