Abstract
As a buffer material in a high-level radioactive nuclear waste repository, bentonite is subjected to the decay heat released by nuclear waste and the infiltration of groundwater from the surrounding rock. The sequential effects of temperature and water saturation are still unknown. The functional barrier effectiveness of the buffer layer is partly dependent on whether the hydrothermal path affects bentonite’s self-sealing. Thus, the swelling pressure and saturated hydraulic conductivity tests were carried out with three hydrothermal paths to investigate whether the hydrothermal path affected the barrier function of bentonite. The results revealed that the sequential effects of temperature and water saturation had little influence on the swelling pressure and hydraulic conductivity of bentonite. However, a high-temperature history can cause a significant deterioration in the swelling pressure and increases in hydraulic conductivity, which are mainly due to losses of exchangeable cations and the cementation formed between clay particles. Therefore, the temperature history should be taken into account for investigating the long-term performance of the buffer layer bentonite.
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References
Agus SS, Schanz T (2008) A method for predicting swelling pressure of compacted bentonites. Acta Geotech 3(2):125–137. https://doi.org/10.1007/s11440-008-0057-0
Akinwunmi B, Sun LL, Hirvi JT, Kasa S, Pakkanen TA (2019) Influence of temperature on the swelling pressure of bentonite clay. Chem Phys 516:177–181. https://doi.org/10.1016/j.chemphys.2018.09.009
Bag R, Rabbani A (2017) Effect of temperature on swelling pressure and compressibility characteristics of soil. Appl Clay Sci 136:1–7. https://doi.org/10.1016/j.clay.2016.10.043
Ballarini E, Graupner B, Bauer S (2017) Thermal-hydraulic-mechanical behavior of bentonite and sand-bentonite materials as seal for a nuclear waste repository: numerical simulation of column experiments. Appl Clay Sci 135:289–299. https://doi.org/10.1016/j.clay.2016.10.007
Camillis MD, Emidio GD, Bezuijena A, Verástegui-Floresb RD (2016) Hydraulic conductivity and swelling ability of a polymer modified bentonite subjected to wet-dry cycles in seawater. Geotext Geomembr 44(5):739–747. https://doi.org/10.1016/j.geotexmem.2016.05.007
Chen WZ, Ma YS, Yu HD, Li FF, Li XL, Sillen X (2017) Effects of temperature and thermally-induced microstructure change on hydraulic conductivity of boom clay. J Rock Mech Geotech Eng 9(3):383–395. https://doi.org/10.1016/j.jrmge.2017.03.006
Chen YG, Dong XX, Zhang XD, Ye WM, Cui YJ (2018) Combined thermal and saline effects on the swelling pressure of densely compacted GMZ bentonite. Appl Clay Sci 166:318–326. https://doi.org/10.1016/j.clay.2018.10.001
Chen YG, Liu LN, Ye WM, Cui YJ, Wu DB (2020) Deterioration of swelling pressure of compacted Gaomiaozi bentonite induced by heat combined with hyperalkaline conditions. Soils Found 59(6):2254–2264. https://doi.org/10.1016/j.sandf.2019.12.008
Cho WJ, Lee JO, Chun KS (1999) The temperature effects on hydraulic conductivity of compacted bentonite. Appl Clay Sci 14(1–3):47–58. https://doi.org/10.1016/S0169-1317(98)00047-7
Cho WJ, Lee JO, Kang CH (2000) Influence of temperature elevation on the sealing performance of a potential buffer material for a high-level radioactive waste repository. Ann Nucl Energy 27(14):1271–1284. https://doi.org/10.1016/S0306-4549(99)00124-3
Chorom M, Rengasamy P (1996) Effect of heating on swelling and dispersion of different cationic forms of a smectite. Clays Clay Miner 44(6):783–790. https://doi.org/10.1346/CCMN.1996.0440609
Couture RA (1985) Steam rapidly reduces the swelling capacity of bentonite. Nature 318:50–52. https://doi.org/10.1038/318050a0
Cuevas J, Villar MV, Martı́n M, Cobeña JC, Leguey S (2002) Thermo-hydraulic gradients on bentonite: distribution of soluble salts, microstructure and modification of the hydraulic and mechanical behaviour. Appl Clay Sci 22:25–38. https://doi.org/10.1016/s0169-1317(02)00109-6
Cui SL, Wang JD, Huang S, Xie WL (2019) Coupled effects of saline solutions and temperature on the swelling deformation property of GMZ bentonite-sand mixtures. Soils Found 59(5):1417–1427. https://doi.org/10.1016/j.sandf.2019.06.006
Cui YJ, Tang AM, Loiseau C, Delage P (2008) Determining the unsaturated hydraulic conductivity of a compacted sand-bentonite mixture under constant volume and free-swell conditions. Phys Chem Earth a/b/c 33:S462–S471. https://doi.org/10.1016/j.pce.2008.10.017
Daniels KA, Harrington JF, Zihms SG, Wiseall AC (2017) Bentonite permeability at elevated temperature. Geosciences 7(1):3. https://doi.org/10.3390/geosciences7010003
Derjaguin BV, Kasasev VV, Khromova EN (1986) Thermal expansion of water in fine pores. J Colloid Interface Sci 109(2):586–587. https://doi.org/10.1016/0021-9797(86)90340-1
Estabragh AR, Khosravi F, Javadi AA (2016) Effect of thermal history on the properties of bentonite. Environ Earth Sci 75:657. https://doi.org/10.1007/s12665-016-5416-9
Harrington JF, Tamayo-Mas E (2016) Observational evidence for the differential development of porewater pressure within compact bentonite and its impact on permeability and swelling pressure. British Geological Survey Report CR/16/160
He Y, Ye WM, Chen YG, Cui YJ (2018) Effects of K+ solutions on swelling behavior of compacted GMZ bentonite. Eng Geol 249:241–248. https://doi.org/10.1016/j.enggeo.2018.12.020
Heuser M, Weber C, Stanjek H, Chen H, Jordan G, Schmahl WW, Natzeck C (2014) The Interaction between bentonite and water vapor. I: examination of physical and chemical properties. Clay Clay Miner 62(3):188–202. https://doi.org/10.1346/CCMN.2014.0620303
Holmboe M, Bourg IC (2014) Molecular dynamics simulations of water and sodium diffusion in smectite interlayer nanopores as a function of pore size and temperature. J Phys Chem C 118(2):1001–1013. https://doi.org/10.1021/jp408884g
Johnson LH, Niemeyer M, Klubertanz G, Siegel P, Gribi P (2002) Calculations of the temperature evolution of a repository for spent fuel, vitrified high-level waste and intermediate level waste in Opalinus Clay. Nagra Technical Report NTB 01–04. Switzerland: national cooperative for the disposal of radioactive waste
Kale RC, Ravi K (2019) Influence of thermal history on swell pressures of compacted bentonite. Process Saf Environ Prot 123:199–205. https://doi.org/10.1016/j.psep.2019.01.004
Kolaříková I, Švandová J, Přikryl R, Vinšová H, Jedináková-Křížová V, Zeman J (2010) Mineralogical changes in bentonite barrier within mock-up-CZ experiment. Appl Clay Sci 47(1–2):10–15. https://doi.org/10.1016/j.clay.2009.11.011
Lang LZ, Baille W, Tripathy S, Schanz T (2018) Experimental study on the influence of preliminary desiccation on the swelling pressure and hydraulic conductivity of compacted bentonite. Clay Miner 53:733–744. https://doi.org/10.1180/clm.2018.53
Lang LZ, Tripathy S, Baille W, Schanz T, Sridharan A (2019) Linkage between swelling pressure, total suction of saturated bentonites and suction of saturating aqueous solutions. Appl Clay Sci 171:82–91. https://doi.org/10.1016/j.clay.2019.02.007
Lee JO, Choi H, Kim GY (2017) Numerical simulation studies on predicting the peak temperature in the buffer of an HLW repository. Int J Heat Mass Transf 115:192–204. https://doi.org/10.1016/j.ijheatmasstransfer.2017.07.039
Lee JO, Jin GL, Kang IM, Kwon S (2012) Swelling pressures of compacted ca-bentonite. Eng Geol 129–130:20–26. https://doi.org/10.1016/j.enggeo.2012.01.005
Li H, Tan YZ, Xie Z, Sun DA, Sun WJ (2021) Method for measuring the saturated permeability coefficient of compacted bentonite at temperatures exceeding 100 °C. Prog Nucl Energy 141:103958. https://doi.org/10.1016/j.pnucene.2021.103958
Lingnau BE, Graham J, Yarechewski D, Tanaka N, Gray MN (1996) Effects of temperature on strength and compressibility of sand-bentonite buffer. Eng Geol 41(1–4):103–115. https://doi.org/10.1016/0013-7952(95)00028-3
Lu N, Likos WJ (2004) Unsaturated soil mechanics. John Wiley & Sons Inc, Hoboken
Malikova N, Marry V, Dufrêche JF, Turq P (2004) Na/Cs montmorillonite: temperature activation of diffusion by simulation. Curr Opin Colloid Interface Sci 9(1):124–127. https://doi.org/10.1016/j.cocis.2004.05.016
Martı́n M, Cuevas J, Leguey S (2000) Diffusion of soluble salts under a temperature gradient after the hydration of compacted bentonite. Appl Clay Sci 17:55–70. https://doi.org/10.1016/S0169-1317(00)00006-5
Ministry of Water Resources of the People’s Republic of China (2019) Standard for geotechnical testing method (in Chinese) GB/T 50123–2019
Park S, Yoon S, Kwon S, Lee MS, Kim GY (2021) Temperature effect on the thermal and hydraulic conductivity of Korean bentonite buffer material. Prog Nucl Energy 137:103759. https://doi.org/10.1016/j.pnucene.2021.103759
Pusch R (1979) Highly compacted sodium bentonite for isolating rock-deposited radioactive waste products. Nucl Technol 45(2):153−157. https://doi.org/10.13182/NT79-A32305
Pusch R (2000) On the effect of hot water vapor on MX-80 clay, SKB technical report TR-00–16. Stockholm, Sweden: Swedish Nuclear Fuel and Waste Management Co
Pusch R, Bluemling P, Johnson L (2003) Performance of strongly compressed MX-80 pellets under repository-like conditions. Appl Clay Sci 23(1–4):239–244. https://doi.org/10.1016/S0169-1317(03)00108-X
Pusch R, Karnland O (1996) Physico/chemical stability of smectite clays. Eng Geol 41(1–4):73–85. https://doi.org/10.1016/0013-7952(95)00027-5
Pusch R, Karnland O, Hokmark H (1990) GMM- a general microstructural model for qualitative and quantitative studies of smectite clays. Stockholm: Swedish Nuclear Fuel Supply Co
Pusch R, Yong RN (2006) Microstructure of smectite clays and engineering performance. Taylor & Francis, New York, USA
Sun DA, Cui HB, Sun WJ (2009) Swelling of compacted sand-bentonite mixtures. Appl Clay Sci 43:485–492. https://doi.org/10.1016/j.clay.2008.12.006
Sun DA, Zhang L, Li J, Zhang BC (2015) Evaluation and prediction of the swelling pressures of GMZ bentonites saturated with saline solution. Appl Clay Sci 105:207–216. https://doi.org/10.1016/j.clay.2014.12.0320169-1317
Sun Z, Chen YG, Ye WM, Cui YJ, Wang Q (2020) Swelling deformation of Gaomiaozi bentonite under alkaline chemical conditions in a repository. Eng Geol 279:105891. https://doi.org/10.1016/j.enggeo.2020.105891
Tan YZ, Li H, Wang PR, Sun DA, Sun WJ (2021) Hydro-mechanical performance of heat-treated bentonite. J Test Eval 49(4):3015–3027. https://doi.org/10.1520/JTE20190570
Tan YZ, Peng F, Limunga GM (2020) A vapor testing device for evaluating the effect of steam on compacted bentonite. Geotech Test J 43(5):1071–1083. https://doi.org/10.1520/GTJ20190026
Tan YZ, Xu X, Ming HJ, Sun DA (2022) Analysis of double-layered buffer in high-level waste repository. Ann Nucl Energy 165:108660. https://doi.org/10.1016/j.anucene.2021.108660
Tripathy S, Thomas HR, Stratos P (2017) Response of compacted bentonites to thermal and thermo-hydraulic loadings at high temperatures. Geosciences 7(3):53. https://doi.org/10.3390/geosciences7030053
Villar MV, Gómez-Espina R, Lloret A (2010) Experimental investigation into temperature effect on hydro-mechanical behaviours of bentonite. J Rock Mech Geotech Eng 2(1):71–78. https://doi.org/10.3724/SP.J.1235.2010.00071
Villar MV, Iglesias RJ, García-Siñeriz JL, Lloret A, Huertas F (2020) Physical evolution of a bentonite buffer during 18 years of heating and hydration. Eng Geol 264:105408. https://doi.org/10.1016/j.enggeo.2019.105408
Villar MV, Lloret A (2004) Influence of temperature on the hydro-mechanical behaviour of a compacted bentonite. Appl Clay Sci 26(1–4):337–350. https://doi.org/10.1016/j.clay.2003.12.026
Wang Q, Tang AM, Cui YJ, Delage P, Gatmiri B (2012) Experimental study on the swelling behaviour of bentonite/claystone mixture. Eng Geol 124:59–66. https://doi.org/10.1016/j.enggeo.2011.10.003
Wersin P, Johnson LH, McKinley IG (2007) Performance of the bentonite barrier at temperatures beyond 100 °C: a critical review. Phys Chem Earth a/b/c 32(8–14):780–788. https://doi.org/10.1016/j.pce.2006.02.051
Wu J, Deng ZH, Deng YF, Zhou AN, Zhang YS (2022) Interaction between cement clinker constituents and clay minerals and their influence on the strength of cement-based stabilized soft clay. Can Geotech J 59(6) 889–900. https://doi.org/10.1139/cgj-2021-0194
Xiang GS, Lv LY, Ge L (2020) Simple method for evaluating swelling of GMZ01 Na-bentonite affected by temperature at osmotic swelling. Soils Found 60(5):1312–1321. https://doi.org/10.1016/j.sandf.2020.09.003
Xu YS, Zhou XY, Sun DA, Zeng ZT (2022) Thermal properties of GMZ bentonite pellet mixtures subjected to different temperatures for high-level radioactive waste repository. Acta Geotech 17:981–992. https://doi.org/10.1007/s11440-021-01244-3
Ye WM, Wan B, Chen B, Chen YG, Cui YJ, Wang J (2012) Temperature effects on the unsaturated permeability of the densely compacted GMZ01 bentonite under confined conditions. Eng Geol 126:1–7. https://doi.org/10.1016/j.enggeo.2011.10.011
Ye WM, Wan M, Chen B, Chen YG, Cui YJ, Wang J (2013) Temperature effects on the swelling pressure and saturated hydraulic conductivity of the compacted GMZ01 bentonite. Environ Earth Sci 68:281–288. https://doi.org/10.1007/s12665-012-1738-4
Ye WM, Zheng ZJ, Chen B, Chen YG, Cui YJ, Wang J (2014) Effects of PH and temperature on the swelling pressure and hydraulic conductivity of compacted GMZ01 bentonite. Appl Clay Sci 101:192–198. https://doi.org/10.1016/j.clay.2014.08.002
Ye WM, Zhu CM, Chen YG, Chen B, Cui YJ, Wang J (2015) Influence of salt solutions on the swelling behavior of the compacted GMZ01 bentonite. Environ Earth Sci 74:793–802. https://doi.org/10.1007/s12665-015-4108-1
Yong RN, Boonsinsuk P, Wong G (1986) Formulation of backfill material for a nuclear fuel waste disposal vault. Can Geotech J 23(2):216–228. https://doi.org/10.1139/t86-031
Zhang JR, Sun DA, Yu HB, Jiang JD, Xu YF (2020) Swelling of unsaturated gmz07 bentonite at different temperatures. Bull Eng Geol Env 79:959–969. https://doi.org/10.1007/s10064-019-01595-y
Zheng L, Rutqvist J, Birkholzer JT, Liu HH (2015) On the impact of temperatures up to 200 °C in clay repositories with bentonite engineer barrier systems: a study with coupled thermal, hydrological, chemical, and mechanical modeling. Eng Geol 197:278–295. https://doi.org/10.1016/j.enggeo.2015.08.026
Zhou ZC, Wang J, Su R, Guo YH, Zhao JB, Zhang M, Ji RL, Li YN, Li JB (2020) Hydrogeochemical and isotopic characteristics of groundwater in Xinchang preselected site and their implications. Environ Sci Pollut Res 27:34734–34745. https://doi.org/10.1007/s11356-019-07208-1
Zhao XG, Wang J, Chen F, Li PF, Ma LK, Xie JL, Liu YM (2016) Experimental investigations on the thermal conductivity characteristics of Beishan granitic rocks for China’s HLW disposal. Tectonophysics 683:124–137. https://doi.org/10.1016/j.tecto.2016.06.021
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The authors are grateful to the National Natural Science Foundation of China (No.51979150 and 52279102) and the China Three Gorges University Dissertation Training Fund Project (no. 2021BSPY004) for financial support.
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Li, H., Tan, Y., Xie, Z. et al. Effect of hydrothermal path on swelling pressure and hydraulic conductivity of compacted bentonite. Bull Eng Geol Environ 81, 479 (2022). https://doi.org/10.1007/s10064-022-02972-w
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DOI: https://doi.org/10.1007/s10064-022-02972-w