Influence of temperature on the hydro-mechanical behavior of Boom Clay

Research output: Contribution to journalArticle

Authors

Institutes & Expert groups

  • Wuhan Institute of Rock and Soil Mechanics, Chinese Academy of Sciences
  • WUT - Wuhan University of Technology - Municipal Engineering Design and Research Institute

Documents & links

Abstract

The purpose of this study is to identify common properties, as well as specific features of Boom Clay with regard to its response to thermo-hydro-mechanical (THM) loading through laboratory experiments, particularly at temperatures significant for radioactive waste disposal. Triaxial shearing tests at various temperatures and various effective confining pressures were performed on Boom Clay samples under undrained conditions. Test results clearly show that under the same hydro-mechanical conditions, an increase in temperature can cause a decrease of shear strength of Boom Clay. This weakening in shear strength was further interpreted as the reduction in cohesion and elastic modulus, and also the pore pressure build-up due to temperature elevation. However, the temperature effect on the friction angle is not clear. The results obtained confirm the effect of the overconsolidation ratio (OCR) on the thermal volume changes (contraction or dilation). The laboratory test results presented here give additional information to gain more insight into the thermal influence of heat emitting wastes on the behavior of clay, to validate and calibrate models.

Details

Original languageEnglish
Pages (from-to)189-197
Number of pages9
JournalInternational Journal of Rock Mechanics & Mining Sciences
Volume108
DOIs
Publication statusPublished - 2 Jul 2018

Keywords

  • Boom Clay, Experimental tests, Temperature effect, Shear strength, Cohesion, Elastic modulus, Pore pressure

ID: 5398963