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Soil–water characteristic curves and hydraulic conductivity of Gaomiaozi bentonite pellet-contained materials

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Abstract

The bentonite pellet-contained material (PCM) is a desired joint sealer for high-level radioactive waste repositories. During the operation of the repository, however, the PCM is unsaturated for most of the period. The water retention capacity and permeability of PCM can thus directly affect the bentonite buffer barrier seepage, nuclide migration, and joint healing. Moreover, the performance of PCM can be strongly influenced by the particle size of bentonite pellets and dry density. In this work, the pressure plate method and vapor equilibrium technique were both utilized to test the soil–water characteristic curves (SWCCs) of the PCMs with varying particle sizes and dry densities. The unsaturated hydraulic conductivity of the PCMs was then predicted by combining the SWCC model and saturated hydraulic conductivity. The results showed that in the low suction range (20–1150 kPa), the dry density and particle size are anti-correlated with the water content. In the high suction range (4200–309,000 kPa), the SWCC is almost insensitive to the variation of dry density and particle size. The Gardner model is suitable for describing the SWCC of PCM. In addition, the hydraulic conductivity of the PCM increases with the rise in particle size, while it decreases as the dry density grows. Finally, the influence mechanism of the SWCC and hydraulic conductivity was further discussed based on the scanning electron microscopy images and pore size distribution curves.

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All data and models generated and used during the study appear in the submitted article.

References

  • Abootalebi P, Siemens G (2018) Thermal properties of engineered barriers for a Canadian deep geological repository. Can Geotech J 55(6):759–776

    Google Scholar 

  • Agus SS, Schanz T, Fredlund DG (2010) Measurements of suction versus water content for bentonite-sand mixtures. Can Geotechn J 47(5):583–594

    Google Scholar 

  • Bai B, Xu T, Nie Q, Li P (2020) Temperature-driven migration of heavy metal Pb2+ along with moisture movement in unsaturated soils. Int J Heat Mass Tran 153:119573

    Google Scholar 

  • Bharat TV, Gapak Y (2021) Soil-water characteristic curves of bentonites in isochoric conditions during wetting: measurement and prediction. Can Geotech J 58(5):711–721

    Google Scholar 

  • Bian X, Cui Y, Zeng L, Li X (2020) State of compacted bentonite inside a fractured granite cylinder after infiltration. Appl Clay Sci 186:105438

    Google Scholar 

  • Fattah MY, Salim NM, Irshayyid EJ (2017) Determination of the soil-water characteristic curve of unsaturated bentonite–sand mixtures. Environ Earth Sci 76(5):201

    Google Scholar 

  • Feng Y, Liu D, Li D, Zhao Q (2017) A study on microstructure composition of unsaturated red mud and its impact on hydraulic characteristics. Geotech Geol Eng 35(4):1357–1367

    Google Scholar 

  • Fredlund DG, Rahurdjo H (1993) Soil mechanics for unsaturated soils. Wiley, New York

    Book  Google Scholar 

  • Fredlund DG, Xing A, Huang S (1994) Predicting the permeability function for unsaturated soils using the soil–water characteristic curve. Can Geotech J 31(4):521–532

    Google Scholar 

  • Gardner WR (1958) Some steady-state solutions of the unsaturated moisture flow equation with application to evaporation from a water table. Soil Sci 85(4):228–232

    Google Scholar 

  • Genuchten MTV (1980) A closed-form equation for predicting the hydraulic conductivity of unsaturated soils. Soil Sci Soc Am J 44(44):892–898

    Google Scholar 

  • Hoffmann C, Alonso EE, Romero E (2007) Hydro-mechanical behaviour of bentonite pellet mixtures. Phys Chem Earth 32:832–849

    Google Scholar 

  • IAEA (2013) Characterization of swelling clays as components of the engineered barrier system for geological repositories. IAEA

    Google Scholar 

  • Lee HB, Lee HK, Shim MJ, Kim SW (1999) Characteristics of thermal welding at the interface of ABS/bentonite composite. Mater Chem Phys 58(3):264–267

    Google Scholar 

  • Liu ZR (2019) Packing properties and hydro-mechanical behaviour considering the influence of temperature of GMZ bentonite pellet mixture. Dissertation, Tongji University

  • Liu J, Skoczylas F, Talandier J, Pu H (2016) Dismantling of the EB experiment: experimental research on the retrieved GBM and bentonite blocks. Nucl Eng Des 300:297–307

    Google Scholar 

  • Liu J, Ni H, Cao X, Ma L, Guo J, Chen X (2020a) Laboratory investigation on gas permeability of compacted GMZ bentonite under a coupled hydraulic-mechanical effect. Eng Geol 276:105761

    Google Scholar 

  • Liu Z, Cui Y, Ye W, Chen B, Wang Q, Chen Y (2020b) Investigation of the hydro-mechanical behaviour of GMZ bentonite pellet mixtures. Acta Geotech 15:2865–2875

    Google Scholar 

  • Liu Z, Ye W, Cui Y, Zhu H, Wang Q, Chen Y (2021) Insights into the water retention behaviour of GMZ bentonite pellet mixture. Acta Geotech 16:3145–3160

    Google Scholar 

  • Lloret A, Villar MV (2007) Advances on the knowledge of the thermo-hydro-mechanical behaviour of heavily compacted “FEBEX” bentonite. Phys Chem Earth 32:701–715

    Google Scholar 

  • Ma G, Zhang H, Ji Z, Tan Y (2021) Comparison of the swelling pressure of bentonite pellet-contained materials and powder. Constr Build Mater 281:122531

    Google Scholar 

  • Molinero-Guerra A, Aimedieu P, Bornert M, Cui YJ, Tang AM, Sun Z, Mokni N, Delage P, Bernier F (2018) Analysis of the structural changes of a pellet/powder bentonite mixture upon wetting by X-ray computed microtomography. Appl Clay Sci 165:164–169

    Google Scholar 

  • Niu WJ, Ye WM, Song X (2020) Unsaturated permeability of Gaomiaozi bentonite under partially free-swelling conditions. Acta Geotech 15:1095–1124

    Google Scholar 

  • Peng F, Tan Y, Sun D (2021) Thermal conductivity of bentonite-graphite mixture and its prediction for high-level radioactive waste repository. Ann Nucl Energy 154:108142

    Google Scholar 

  • Penumadu D, Dean J (2000) Compressibility effect in evaluating the pore-size distribution of kaolin clay using mercury intrusion porosimetry. Can Geotech J 37(2):393–405

    Google Scholar 

  • Pusch R, Bluemling P, Johnson L (2003) Performance of strongly compressed MX-80 pellets under repository-like conditions. Appl Clay Sci 23:239–244

    Google Scholar 

  • Sandén T, Börgesson L (2014) System design of backfill-Methods for water handling, KBSR-14-09. Swedish Nuclear Fuel and Waste Management Company

    Google Scholar 

  • Seiphoori A, Ferrari A, Laloui L (2014a) An insight into the water retention behaviour of MX 80 granular bentonite. In: International Conference on the Performance of Engineered Barriers, Hannover.

  • Seiphoori A, Ferrari A, Laloui L (2014b) Water retention behaviour and microstructural evolution of MX-80 bentonite during wetting and drying cycles. Géotechnique 64(9):721–734

    Google Scholar 

  • Seiphoori A, Laloui L, Ferrari A, Hassan M, Khushefati WH (2016) Water retention and swelling behaviour of granular bentonites for application in Geosynthetic Clay Liner (GCL) systems. Soils Found 56(3):449–459

    Google Scholar 

  • Standardization Administration of China (SAC) (2019) China National Standards GB/T50123-2019: standard for geotechnical testing method. China Planning Press, Beijing (In Chinese)

    Google Scholar 

  • Standardization Administration of China (SAC) (2020) China National Standards GB/T20973-2020: bentonite. China Quality Inspection press, Beijing (In Chinese)

    Google Scholar 

  • Sun Z, Chen Y, Ye W, Cui Y, Wang Q (2020) Swelling deformation of Gaomiaozi bentonite under alkaline chemical conditions in a repository. Eng Geol 279:105891

    Google Scholar 

  • Sun W, Xu G, Wei G, Zhang W, Sun D (2021) Effects of ammonium ion and bentonite content on permeability of bentonite-clay mixture. Environ Earth Sci 80(4):151

    Google Scholar 

  • Tan Y, Zhang H, He D, Zhang G (2019) Deterioration of exposed buffer block: desiccation shrinkage and cracking. Bull Eng Geol Environ 78(7):5431–5444

    Google Scholar 

  • Tan Y, Zhang H, Wang Y (2020) Evaporation and shrinkage processes of compacted bentonite-sand mixtures. Soils Found 60(2):505–519

    Google Scholar 

  • Tripathy S, Tadza MYM, Thomas HR (2014) Soil-water characteristic curves of clays. Can Geotech J 51(8):869–883

    Google Scholar 

  • Van Geet M, Volckaert G, Roels S (2005) The use of microfocus X-ray computed tomography in characterising the hydration of a clay pellet/powder mixture. Appl Clay Sci 29(2):73–87

    Google Scholar 

  • Vaz EF, Gitirana GFN, Mendes TA, Rebolledo JFR (2021) On the equilibrium of suction and pressure plate tests. Acta Geotech 16:2741–2758

    Google Scholar 

  • Wan M, Ye WM, Chen YG, Cui YJ, Wang J (2015) Influence of temperature on the water retention properties of compacted GMZ01 bentonite. Environ Earth Sci 73(8):4053–4061

    Google Scholar 

  • Wang J (2010) High-level radioactive waste disposal in China: update 2010. J Rock Mech Geotech Eng 2(01):1–11

    Google Scholar 

  • Wang Q, Cui Y, Tang AM, Barnichon J, Saba S, Ye W (2013a) Hydraulic conductivity and microstructure changes of compacted bentonite/sand mixture during hydration. Eng Geol 164:67–76

    Google Scholar 

  • Wang Q, Minh Tang A, Cui Y, Delage P, Barnichon J, Ye W (2013b) The effects of technological voids on the hydro-mechanical behaviour of compacted bentonite-sand mixture. Soils Found 53(2):232–245

    Google Scholar 

  • Wang Y, Zhang H, Tan Y, Zhu J (2021) Sealing performance of compacted block joints backfilled with bentonite paste or a particle-powder mixture. Soils Found 61(2):496–505

    Google Scholar 

  • Washburn EW (1921) The dynamics of capillary flow. Phys Rev 17(3):273

    Google Scholar 

  • Ye W, Qian L, Chen B, Wang J, Cui Y (2009) Laboratory test on unsaturated hydraulic conductivity of densely compacted Gaomiaozi Bentonite under confined conditions. J Rock Mech Geotech Eng 31(1):105–108 (In Chinese)

    Google Scholar 

  • Yoon S, Kim G (2021) Measuring thermal conductivity and water suction for variably saturated bentonite. Nucl Eng Technol 53(3):1041–1048

    Google Scholar 

  • Zhang M, Zhang H, Zhou L, Wang B, Wang S (2014) Hydro-mechanical analysis of GMZ bentonite-sand mixtures in the water infiltration process as the buffer/backfill mixture in an engineered nuclear barrier. Appl Clay Sci 97–98:115–124

    Google Scholar 

  • Zhang H, Wang W, Liu P, Yan M, Peng Y (2016) Sealing and healing of compacted bentonite block joints in HLW disposal. J Rock Mech Geotech Eng 35(S2):3605–3614 (In Chinese)

    Google Scholar 

  • Zhang H, Tan Y, Zhu F, He D, Zhu J (2019) Shrinkage property of bentonite-sand mixtures as influenced by sand content and water salinity. Constr Build Mater 224:78–88

    Google Scholar 

  • Zhu J, Zhang H, Wang Z, Yang S, Ding Z (2021) Physico-mechanical properties of thick paleosol in Q1 strata of the Chinese Loess Plateau and their variations during tunnel excavation. Eng Geol 295:106426

    Google Scholar 

Download references

Acknowledgements

The authors are grateful for the financial support from the National Natural Science Foundation of China [Grant No. 41972265 and Grant No. 41672261].

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Authors and Affiliations

  1. College of Civil Engineering and Mechanics, Lanzhou University, 222 South Tianshui Road, Lanzhou, 730000, Gansu, China

    Jianghong Zhu, Zhenyan Su & Huyuan Zhang

  2. Key Laboratory of Mechanics on Disaster and Environment in Western China (Lanzhou University), Ministry of Education, Lanzhou, 730000, China

    Huyuan Zhang

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  1. Jianghong Zhu
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  2. Zhenyan Su
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Contributions

JZ: conceptualization, methodology, investigation, data curation, and writing—original draft preparation. ZS: writing—review and editing. HZ: conceptualization, supervision, funding acquisition, project administration, and writing—review and editing.

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Correspondence to Huyuan Zhang.

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Zhu, J., Su, Z. & Zhang, H. Soil–water characteristic curves and hydraulic conductivity of Gaomiaozi bentonite pellet-contained materials. Environ Earth Sci 81, 92 (2022). https://doi.org/10.1007/s12665-022-10200-7

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