Effects of hyperalkaline solutions on the swelling pressure of compacted Gaomiaozi (GMZ) bentonite from the viewpoint of Na+ cations and OH– anions
Source abstract
Abstract
Abstract In China, Gaomiaozi (GMZ) bentonite has been selected as a suitable buffer material for high-level nuclear waste disposal. Groundwater in Beishan area, which has been considered as a potential site for the construction of the repository, may reach a high pH value because of its chemical background and possible concrete degradation during the operation of the repository. In order to investigate the independent effects of Na+ cations and OH– anions on the behavior of compacted GMZ bentonite, a series of swelling pressure tests with NaOH and NaCl solutions infiltration was conducted. The mercury intrusion porosimeter (MIP) and the X-ray diffraction (XRD) explorations were performed on the specimens before and after experiencing the swelling pressure tests in order to find out the influences of infiltration solution chemistry on the microstructure and mineralogy of compacted GMZ bentonite. The results showed that high Na+ cations concentration can inhibit the crystalline swelling and the double-layer swelling; high OH– anions concentration can facilitate the double-layer swelling and fabric re-arrangement; the effects of NaOH solutions with different concentrations on the swelling pressure present the interaction of Na+ cations and OH– anions.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Soil and Unsaturated Flow · Landfill Environmental Impact Studies · Grouting, Rheology, and Soil Mechanics
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (76)
Show source-provided references
1. The combined effect of pH and temperature on smectite dissolution rate under acidic conditions10.1016/j.gca.2004.10.001 ↗
2. Effect of alkaline solutions on bentonite properties10.1007/s12665-017-6704-8 ↗
3. Smectite transformation in high molar KOH solutions10.1180/000985599546226 ↗
4. Calcium-resistant membrane behavior of polymerized bentonite10.1061/(ASCE)GT.1943-5606.0001042 ↗
5. Porewater chemistry in compacted re-saturated MX-80 bentonite10.1016/S0169-7722(02)00125-0 ↗
6. Smectite dissolution kinetics at 80 °C and pH 8.810.1016/S0016-7037(00)00378-1 ↗
7. Consequences on water retention properties of double-porosity features in a compacted silt10.1007/s11440-012-0159-6 ↗
8. Chemical impact on the hydro-mechanical behaviour of high-density FEBEX bentonite10.1016/j.pce.2008.10.056 ↗
9. A preliminary study on hydraulic resistance of bentonite/host-rock seal interface10.1680/geot.13.P.209 ↗
10. Swelling pressure and hydraulic conductivity of compacted GMZ01 bentonite under salinization–desalinization cycle conditions10.1016/j.clay.2015.06.033 ↗
11. Alteration of compacted GMZ bentonite by infiltration of alkaline solution10.1180/claymin.2016.051.2.10 ↗
12. Experimental investigation of the interaction of clays with high-ph solutions: a case study from the callovo-oxfordian formation, meuse-haute marne underground laboratory (France)10.1346/000986002320679369 ↗
13. Swelling characteristics of compacted GMZ bentonite-sand-mixtures as a buffer/backfill material in China10.1016/j.enggeo.2012.05.004 ↗
14. Alteration of compacted bentonite by diffusion of highly alkaline solutions10.1127/0935-1221/2009/0021-1947 ↗
15. Modeling experimental results of diffusion of alkaline solutions through a compacted bentonite barrier10.1016/j.cemconres.2009.09.011 ↗
16. Reactivity of the cement-bentonite interface with alkaline solutions using transport cells10.1016/j.apgeochem.2006.02.016 ↗
17. Bentonite transformations in strongly alkaline solutions10.1016/j.geotexmem.2009.10.010 ↗
18. Hydrogeological characteristics of Beishan preselected area, Gansu province for China’s high-level radioactive waste repository
19. He · 2017
20. Swelling pressures of MX-80 bentonite in solutions of different ionic strength10.1016/j.pce.2008.10.005 ↗
21. Kinetics of montmorillonite dissolution in granitic solutions10.1016/S0883-2927(00)00049-4 ↗
22. Experimentally determined swelling pressures and geochemical interactions of compacted Wyoming bentonite with highly alkaline solutions10.1016/j.pce.2006.01.012 ↗
23. Stability of bentonites in salt solutions: II. Potassium chloride solution — initial step of illitization?10.1016/j.clay.2010.04.009 ↗
24. Stability of bentonites in salt solutions III — Calcium hydroxide10.1016/j.clay.2010.12.004 ↗
25. Minor actinide transmutation - a waste management option10.1016/0022-5088(86)90432-7 ↗
26. Simplified evaluation on hydraulic conductivities of sand-bentonite mixture backfill10.1016/j.clay.2003.09.006 ↗
27. Swelling characteristics of bentonites in artificial seawater10.1139/T08-120 ↗
28. Influence of layer charge on swelling of smectites10.1016/j.clay.2006.01.009 ↗
29. Swelling pressures of compacted Ca-bentonite10.1016/j.enggeo.2012.01.005 ↗
30. Advances on the knowledge of the therm-hydro-mechanical behaviour of heavily compacted “FEBEX” bentonite10.1016/j.pce.2006.03.002 ↗
31. Mechanical behaviour of heavily compacted bentonite under high suction changes10.1680/geot.2003.53.1.27 ↗
32. Coupling effects during steady-state solute diffusion through a semipermeable clay membrane10.1021/es011130q ↗
33. Salt penetration into electrical double layers10.1021/la00047a032 ↗
34. Mata · 2003
35. A hydro-geochemical analysis of the saturation process with salt water of a bentonite crushed granite rock mixture in an engineered nuclear barrier10.1016/j.enggeo.2005.06.018 ↗
36. The role of structure in the chemically induced deformations of FEBEX bentonite10.1016/S0169-1317(03)00107-8 ↗
37. Double-structure effects on the chemo-hydro-mechanical behaviour of a compacted active clay10.1680/geot.SIP13.P.011 ↗
38. Porewater chemistry in compacted bentonite10.1016/S0013-7952(99)00075-7 ↗
39. Dissolution of montmorillonite in compacted bentonite by highly alkaline aqueous solutions and diffusivity of hydroxide ions10.1016/j.clay.2003.12.023 ↗
40. Effective stress in swelling soils during wetting drying cycles10.1016/j.enggeo.2016.05.021 ↗
41. Pusch · 1983 · 46
42. Pusch · 2001 · 35
43. Qian · 2007
44. Hydrothermal alteration of “La Serrata” bentonite (Almeria, Spain) by alkaline solutions10.1016/S0169-1317(02)00087-X ↗
45. Role of osmotic suction in swelling of salt amended clays10.1139/t04-086 ↗
46. Swelling of compacted clay under osmotic gradients10.1680/geot.2006.56.10.707 ↗
47. Crystalline and osmotic swelling of an expansive clay inundated with sodium chloride solutions10.1007/s10706-013-9629-3 ↗
48. An insight into the water retention properties of compacted clayey soils10.1680/geot.2011.61.4.313 ↗
49. Experimental study of the effect of pH and temperature on the kinetics of montmorillonite dissolution10.1016/j.gca.2009.03.026 ↗
50. Reaction kinetics of FEBEX bentonite in hyperalkaline conditions resembling the cement–bentonite interface10.1016/j.clay.2006.04.008 ↗
51. Effect of fluid chemistry on the microstructure of light backfill: an X-ray CT investigation10.1016/j.enggeo.2016.01.012 ↗
52. Alteration of bentonite by hyperalkaline fluids: a review of the role of secondary minerals10.1016/j.pce.2005.08.048 ↗
53. Response to swelling and permeability of bentonite using saline solution for nuclear waste disposal
54. Evaluation of the impact of pore fluid chemistry on the hydromechanical behaviour of clay-based sealing materials10.1139/T10-064 ↗
55. Influence of pore fluid chemistry on the mechanical properties of clay-based materials10.1007/s10706-014-9778-z ↗
56. The effects of salt solutions on the properties of bentonite-sand mixtures10.1180/claymin.1998.033.4.12 ↗
57. In situ observations of the swelling of bentonite aggregates in NaCl solution10.1016/j.clay.2004.11.001 ↗
58. Modelling the thermo-mechanical volume change behavior of compacted expansive clays10.1680/geot.2009.59.3.185 ↗
59. Experimental investigation of the effect of high-pH solutions on the Opalinus Shale and the Hammerschmiede Smectite10.1180/000985500546981 ↗
60. Swelling pressures of compacted bentonites from diffuse double layer theory10.1139/t03-096 ↗
61. Influence of temperature on the hydro-mechanical behaviour of a compacted bentonite10.1016/j.clay.2003.12.026 ↗
62. Physical property of China's buffer material for high-level radioactive waste repositories
63. Performance of the bentonite barrier at temperatures beyond 100 °C: a critical review10.1016/j.pce.2006.02.051 ↗
64. Experimental and modeling study on long-term alteration of compacted bentonite with alkaline groundwater10.1016/j.pce.2005.10.003 ↗
65. An experimental study of the water transfer through confined compacted GMZ bentonite10.1016/j.enggeo.2009.08.003 ↗
66. Advances on the knowledge of the buffer/backfill properties of heavily-compacted GMZ bentonite10.1016/j.enggeo.2010.06.002 ↗
67. Temperature effects on the unsaturated permeability of the densely compacted GMZ01 bentonite under confined conditions10.1016/j.enggeo.2011.10.011 ↗
68. Experimental investigation on the thermal volumetric behavior of highly compacted GMZ01 bentonite10.1016/j.clay.2013.09.001 ↗
69. Effects of salt solutions on the hydro-mechanical behavior of compacted GMZ01 bentonite10.1007/s12665-014-3169-x ↗
70. Effects of pH and temperature on the swelling pressure and hydraulic conductivity of compacted GMZ01 bentonite10.1016/j.clay.2014.08.002 ↗
71. Influence of salt solutions on the swelling behavior of the compacted GMZ01 bentonite10.1007/s12665-015-4108-1 ↗
72. Thermochemical effects on the smectite alteration of GMZ bentonite for deep geological repository. Environ10.1007/s12665-016-5716-0 ↗
73. Zhang · 2013
74. Hydro-mechanical analysis of GMZ bentonite-sand mixtures in the water infiltration process as the buffer/backfill mixture in an engineered nuclear barrier10.1016/j.clay.2014.05.016 ↗
75. Influence of salt solutions on the swelling pressure and hydraulic conductivity of compacted GMZ01 bentonite10.1016/j.enggeo.2013.09.001 ↗
76. Impact of cyclically infiltration of CaCl2, solution and de-ionized water on volume change behavior of compacted GMZ01 bentonite10.1016/j.enggeo.2014.11.005 ↗