In the context of research into deep nuclear waste disposal, Boom clay,a stiff soil from theUnderground Research Laboratory in Mol, Belgium, has been studied in various works. In this paper, containing X-ray diffractiontests, oedometertests, consolidated undrained shearing (CUS) tests and scanning electron microscopic (SEM) tests, a series of experimental studies intended to study the hydro-mechanical behavior and microfabric of Boom clay are presented. X-ray diffractiontests and SEMtests further highlight the high content of clay mineral of Boom clay(about 60% inaverage). Preconsolidation pressure, which is about 5.0MPa, was determined by oedomete rtests. High swelling property under hydro-mechanical coupling effect has been investigated on the clay samples during the CUS test, and also high viscous potential has been represented under shearingrate of 20 mm/min. SEM tests show that the microstructure of Boom clay arranged more directional and denser, and it can be observed clearly through the microstructure variation of pores and fissures.
|Journal||International Journal of Rock Mechanics & Mining Sciences|
|State||Published - Jul 2012|