In recent years, the Excavation Disturbed or Damaged zone (EDZ) has been a focus of continuous international research activities, covering the key processes, phenomena and features associated with the creation and evolution of the EDZ for a variety of host-rock formations, including crystalline rock, rock salt, soft clays and indurated clays. Soft clays and indurated clay formations were identified as a class of sedimentary rocks with a distinctive deformation behaviour, displaying transitional features between ductile yielding and brittle failure in response to the excavation process. In the context of radioactive waste disposal, special emphasis has been given to the favourable capacity of EDZ fractures in clay formations to self-sealing after closure of the backfilled repository structures. The Excavation Damaged Zone (EDZ) is a zone with significant irreversible processes and significant changes in flow and transport properties. These changes, for example, can include one or more orders of magnitude increase in flow permeability. (Tsang et al. 2005)
So my question is "What's the difference between Soft clays and indurated clay?"
'indurated' just means that the clays are more firm. It is often used to describe the degree of lithification of sediments.
Hello,
I agree with dear Shannon,
Here some indications about geotechnical classifications of clays.
Dear if Clay Rock have minimized moisture contant then called soft clay and if absence of moisture content then called indurated clay
There may be a difference in terms of seismic response, ie the amplification of seismic motion. Indeed, resting on a rather hard substratum, the soft clays amplify more this vibratory movement than the indurated clays. This may be the case for clay formations in recent sedimentary basins (Quaternary).
- Badges
- Science topic