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Effect of temperature on soil-water characteristics and hysteresis of compacted Gaomiaozi bentonite

  • Wei-min Ye (叶为民)Email author
  • Min Wan (万 敏)
  • Bao Chen (陈 宝)
  • Yong-gui Chen (陈永贵)
  • Yu-jun Cui (崔玉军)
  • Ju Wang (王 驹)
Article

Abstract

Laboratory tests under different constraint conditions were carried out to obtain the soil-water retention curves (SWRCs) of highly-compacted confined/unconfined Gaomiaozi (GMZ) bentonite at 20, 40 and 80 °C, respectively. The effect of temperature on the soil-water characteristics of the highly-compacted GMZ bentonite was analyzed. The results show that the water retention capacity of the highly-compacted GMZ bentonite decreases as the temperature increases under unconfined and confined conditions. At a certain temperature, the constraint conditions have little influence on the water retention capacity of the compacted bentonite at high suction, but the water retention capacity of the confined specimen is lower than that of the unconfined specimen at low suction. Under unconfined conditions, the hysteretic behaviour of the compacted bentonite decreases with increasing temperature. At high suction (>4 MPa), the hysteretic behaviour of the unconfined bentonite tends to increase with the decrease of the suction. In summary, the hysteretic behaviour of the compacted bentonite is not significant.

Key words

Gaomiaoz bentonite soil-water characteristic hysteretic behavior nuclear waste repository water retention capacity temperature 

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Copyright information

© Central South University Press and Springer Berlin Heidelberg 2009

Authors and Affiliations

  • Wei-min Ye (叶为民)
    • 1
    • 2
    Email author
  • Min Wan (万 敏)
    • 1
  • Bao Chen (陈 宝)
    • 1
  • Yong-gui Chen (陈永贵)
    • 1
  • Yu-jun Cui (崔玉军)
    • 3
  • Ju Wang (王 驹)
    • 4
  1. 1.Key Laboratory of Geotechnical and Underground Engineering, Ministry of EducationTongji UniversityShanghaiChina
  2. 2.United Research Center for Urban Environment and Sustainable DevelopmentMinistry of EducationShanghaiChina
  3. 3.Ecole des Ponts Paries TechParisFrance
  4. 4.Beijing Research Institute of Uranium GeologyBeijingChina

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