Advertisement

A Suction- and Temperature-Controlled Oedometric Device

  • Hugo TroupelEmail author
  • Jean-Michel Pereira
  • Matthieu Vandamme
Conference paper
Part of the Springer Series in Geomechanics and Geoengineering book series (SSGG)

Abstract

To characterize the influence of temperature and relative humidity on the mechanical behavior of geomaterials, an experimental device was designed based on a conventional oedometer testing device. The aim of this work is to provide fundamental information about Thermo-Hydro-Mechanical coupling of unsaturated porous geomaterials such as sand or clay. Several methods were tested and compared to impose relative humidity and temperature. Two systems of control of relative humidity were developed: one using salt solutions to impose constant relative humidity with accuracy in the range of ±4% and the other one using the variation of the saturated vapor pressure of water with temperature to impose relative humidities and potentially make them vary over time. A special attention was paid to thermal insulation of the entire system to reduce temperature variations. A Proportional–Integral–Derivative controller (PID controller) permits to control temperature of samples between 20 and 60 °C  for a week with accuracy in the range of ±0.5 °C. This system makes it possible to test 3 samples in parallel, at the same temperature but at potentially different relative humidities. For each sample the vertical displacement, the temperature close to the sample, the relative humidity of the air injected into the sample and the lateral pressure (since zero lateral strain boundary conditions are imposed) are measured. Finally the experimental device was tested on Hostun sand at two temperatures and three relative humidities.

Keywords

Relative Humidity Saturated Vapor Pressure Horizontal Stress Experimental Device Compression Index 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

References

  1. Bidarmaghz A, Makasis N, Narsilio GA, Francisca FM, Carro Pérez ME (2015) Geothermal energy in loess. Environ Geotechnics 3(4):225–236CrossRefGoogle Scholar
  2. Désarnaud J, Bertrand F, Shahidzadeh-Bonn N (2013) Impact of the kinetics of salt crystallization on stone damage during rewetting/drying and humidity cycling. J Appl Mech 80(2):020911CrossRefGoogle Scholar
  3. François B, Laloui L (2010) An oedometer for studying combined effects of temperature and suction on soils. Geotechnical Test J 33(2):1–11Google Scholar
  4. François B, Salager S, El Youssoufi M, Ubals Picanyol D, Laloui L, Saix C (2007) Compression tests on a sandy silt at different suction and temperature levels. In: Computer applications in geotechnical engineering, pp 1–10Google Scholar
  5. Recordon E (1993) Déformabilité des sols non saturés à diverses températures. Rev Fr Géotech 65:37–56Google Scholar
  6. Romero E, Gens A, Lloret A (2003) Suction effects on a compacted clay under non-isothermal conditions. Géotechnique 53(1):65–81CrossRefGoogle Scholar
  7. Romero E, Villar MV, Lloret A (2005) Thermo-hydro-mechanical behaviour of two heavily overconsolidated clays. Eng Geol 81(3):255–268CrossRefGoogle Scholar
  8. Schlosser F (1990) Ouvrages de soutènement: Poussée et butée. Techniques de l’ingénieur. Construction 1(C242):C242–1Google Scholar
  9. Tang AM, Cui YJ (2005) Controlling suction by the vapour equilibrium technique at different temperatures and its application in determining the water retention properties of MX80 clay. Can Geotechnical J 42(1):287–296MathSciNetCrossRefGoogle Scholar
  10. Ye WM, Zhang YW, Chen B, Zheng ZJ, Chen YG, Cui YJ (2012) Investigation on compression behaviour of highly compacted GMZ01 bentonite with suction and temperature control. Nuclear Eng Des 252:11–18CrossRefGoogle Scholar

Copyright information

© Springer International Publishing AG 2017

Authors and Affiliations

  • Hugo Troupel
    • 1
    Email author
  • Jean-Michel Pereira
    • 1
  • Matthieu Vandamme
    • 1
  1. 1.Université Paris-Est, Laboratoire Navier (UMR 8205), CNRS, ENPC, IFSTTARMarne-la-ValléeFrance

Personalised recommendations