Advertisement

Gas Breakthrough of Compacted Bentonite/Sand-Argillite Interfaces

  • Shuai-Bing Song
  • Jiang-Feng Liu
  • Xu-Lou Cao
  • Yong-Gui Chen
  • Hong-Yang Ni
  • Jia-Rui Zhang
  • Yan Ma
Conference paper
Part of the Environmental Science and Engineering book series (ESE)

Abstract

This paper focuses on gas breakthrough tests through bentonite-argillite interface. The main contribution of our study is to provide insights into the swelling kinetics, gas breakthrough pressure of these materials. During the tests, bentonite/sand plugs and bentonite-argillite plugs are used to perform swelling tests and gas breakthrough tests. Experimental results show that continuous gas passage through fully saturated bentonite/sand is not obtained until 10.5 MPa gas pressure. When a bentonite/sand plug swells inside a smooth metal tube, gas passage occurs at 7–8 MPa, which is similar to the effective swelling pressure of bentonite, as measured by independent swelling experiments. For argillite alone, saturated with water until sealing (water permeability on the order of 10−20–10−21 m2), gas breakthrough may occur at as low a pressure as 0.2 MPa and up to 6 MPa for undisturbed argillite. Finally, also after full water saturation, continuous gas breakthrough through the bentonite-argillite interface is detected at between 7 to 8 MPa gas pressure. It is interpreted that the argillite rock or the bentonite-argillite interface are both preferential pathways for gas migration when all materials become fully saturated.

Keywords

Swelling clay Bentonite-sand plug Argillite Bentonite/argillite interface Gas breakthrough 

Notes

Acknowledgments

The authors are grateful for the support provided by the Open Fund (KLE-TJGE-B1703) of Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education (Tongji University), the Natural Science Foundation of Jiangsu Province of China (BK20160249) and the Fundamental Research Funds for the Central Universities (China University of Mining and Technology) (2017QNA29).

References

  1. Alonso EE, Olivella S, Arnedo D (2006) Mechanisms of gas transport in clay barriers. J Iber Geol 32(2):175–196Google Scholar
  2. Cui SL, Zhang HY, Zhang M (2012) Swelling characteristics of compacted GMZ bentonite–sand mixtures as a buffer/backfill material in China. Eng Geol 141–142:65–73MathSciNetCrossRefGoogle Scholar
  3. Bosgiraud J (2004) Scope of work design, fabrication, assembly, handling and packaging of buffer rings. Technical report C CC ASTE 04-0520/B, ANDRAGoogle Scholar
  4. Gatabin C (2005) Selection and THM characterization of the buffer material. Technical report RT DPC/SCCME 05-704-B, ANDRAGoogle Scholar
  5. Liu JF, Davy CA, Talandier J, Skoczylas F (2014) Effect of gas pressure on the sealing efficiency of compacted bentonite-sand plugs. J Contam Hydrol 170:10–27CrossRefGoogle Scholar
  6. Liu JF, Song Y, Skoczylas F, Liu J (2016) Gas migration through water-saturated bentonite-sand mixtures, COx argillite and their interfaces. Can Geotech J 53(1):60–71CrossRefGoogle Scholar
  7. Liu JF, Song SB, Ni HY, Cao XL, Pu H, Mao XB, Skoczylas F (2018) Research on the gas migration properties in a saturated bentonite/sand mixture under flexible boundary condition. Soils Found 58(1):97–109CrossRefGoogle Scholar
  8. M’Jahad S (2012) Impact de la fissuration sur les propriétés de rétention d`eau et de transport des géométraux. Application au stockage profond des dechets radioactifs. PhD thesis, Ecole Centrale de Lille, France (in French)Google Scholar
  9. Pusch R, Forsberg, T (1983) Gas migration through bentonite clay. Technical report TR. 83-71. SKBF-KBS, SKBF-KBS technical reportGoogle Scholar
  10. Sun DA, Zhang L, Li J, Zhang B (2015) Evaluation and prediction of the swelling pressures of GMZ bentonites saturated with saline solution. Appl Clay Sci 105:207–216CrossRefGoogle Scholar
  11. Xu L, Ye WM, Ye B (2017) Gas breakthrough in saturated compacted GMZ bentonite under rigid boundary conditions. Can Geotech J 54(8):1139–1149CrossRefGoogle Scholar
  12. Ye WM, Su W, Chen YG et al (2017) Membrane behavior of compacted GMZ bentonite and its granite mixture. Environ Earth Sci 76(20):683CrossRefGoogle Scholar

Copyright information

© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  • Shuai-Bing Song
    • 1
    • 2
  • Jiang-Feng Liu
    • 1
    • 2
  • Xu-Lou Cao
    • 1
    • 2
  • Yong-Gui Chen
    • 1
  • Hong-Yang Ni
    • 2
  • Jia-Rui Zhang
    • 2
  • Yan Ma
    • 2
  1. 1.Key Laboratory of Geotechnical and Underground Engineering of Ministry of EducationTongji UniversityShanghaiChina
  2. 2.The State Key Laboratory for GeoMechanics and Deep Underground Engineering, and School of Mechanics and Civil EngineeringChina University of Mining and TechnologyXuzhouChina

Personalised recommendations