Investigating the time-dependent behaviour of Boom clay under thermo-mechanical loading

Details Investigating the time-dependent behaviour of Boom clay under thermo-mechanical loading Investigating the time-dependent behaviour of Boom clay under thermo-mechanical loading

2009-04-23

arxiv.org/abs/0904.3652v1

G\'eotechnique 59, 4 (2009) 319-329

Physics

Classical Physics

Scientific paper

10.1680/geot.2009.59.4.319

Among the various laboratory studies to investigate the Thermo-Hydro-Mechanical (THM) behaviour of Boom clay, relatively few were devoted to the time dependent behaviour, limiting any relevant analysis of the long-term behaviour of the disposal facility. The present work aims at investigating the time-dependent behaviour of Boom clay under both thermal and mechanical loading. High-pressure triaxial tests at controlled temperatures were carried out for this purpose. The tests started with constant-rate thermal and/or mechanical consolidation and ended with isobar heating and/or isothermal compression at a constant stress rate or by step loading. Significant effects of temperature as well as of compression and heating rates were observed on the volume change behaviour. After being loaded to a stress lower than the pre-consolidation pressure (5 MPa) at a low temperature of 25\degree C and at a rate lower than 0.2 kPa/min, the sample volume changes seemed to be quite small, suggesting a full dissipation of pore water pressure. By contrast, after being subjected to high loading and heating rates (including step loading or step heating), the volume changes appeared to be significant, particularly in the case of stresses much higher than the pre-consolidation pressure. Due to low permeability, full consolidation of Boom clay required a long period of time and it was difficult to distinguish consolidation and creep from the total volume change with time.

Affiliated with

Also associated with

No associations

Rating

Investigating the time-dependent behaviour of Boom clay under thermo-mechanical loading does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Investigating the time-dependent behaviour of Boom clay under thermo-mechanical loading, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Investigating the time-dependent behaviour of Boom clay under thermo-mechanical loading will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-409146