Estimation of the swelling strain and swelling pressure of compacted bentonite using electrical conductivity
Source abstract
Abstract
Estimation of the swelling strain or swelling pressure is important for predicting the behavior of compacted bentonite barriers. In this study, the electrical conductivity of compacted bentonite was measured under free-swell and confined conditions to investigate the predictability of swelling strain or swelling pressure from the measured electrical conductivity. The evolution of electrical conductivity by water penetration was qualitatively consistent with that of swelling strain or swelling pressure, implying that monitoring electrical conductivity could be used to detect the initiation and termination of swelling process or any internal changes in compacted bentonite. The relationships between normalized swelling strain and normalized electrical conductivity, and between normalized swelling pressure and normalized electrical conductivity were developed based on the results of Ca-bentonite hydrated with NaCl solution, and those were verified using the results of Ca-bentonite hydrated with KCl and CaCl 2 solutions, and Na-bentonite hydrated with NaCl solution. Finally, the limitations and possibilities of using electrical conductivity in estimating swelling parameters and monitoring swelling process were discussed in this study.
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Research context
OpenAlex topics: Geophysical and Geoelectrical Methods · Soil and Unsaturated Flow · Geophysical Methods and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (51)
Show source-provided references
1. A method for predicting swelling pressure of compacted bentonites10.1007/s11440-008-0057-0 ↗
2. Swelling pressure of Na- and Ca-montmorillonites in saline environments: a molecular dynamics study10.1016/j.chemphys.2019.110511 ↗
3. Swelling ability and behaviour of bentonite-based materials for deep repository engineered barrier systems: influence of physical, chemical and thermal factors10.1016/j.jrmge.2021.11.009 ↗
4. The electrical resistivity log as an aid in determining some reservoir characteristics10.2118/942054-G ↗
5. Rheological behaviour of saturated expansive clay materials
6. Bartos · 2002
7. Modeling diffusion and adsorption in compacted bentonite: a critical review10.1016/S0169-7722(02)00128-6 ↗
8. Influence of dry density and water salinity on the swelling pressure and hydraulic conductivity of compacted GMZ01 bentonite–sand mixtures10.1007/s11440-021-01305-7 ↗
9. Relationship between hydraulic conductivity and formation factor of coarse-grained soils as a function of particle size10.1016/j.jappgeo.2016.02.013 ↗
10. Effects of clay fraction and pore water conductivity on electrical conductivity of sand-kaolinite mixed soils10.1016/j.petrol.2016.10.009 ↗
11. Estimating the electrical conductivity of clayey soils with varying mineralogy using the index properties of soils10.1016/j.clay.2021.106388 ↗
12. Evaluation on expansive performance of the expansive soil using electrical responses10.1016/j.jappgeo.2017.12.001 ↗
13. Influence of the presence of heavy metals on the behaviour of bentonites10.1007/s12665-016-5811-2 ↗
14. A generalized Archie’s law for n phases10.1190/1.3509781 ↗
15. Bentonite barrier materials and the control of microbial processes: safety case implications for the geological disposal of radioactive waste10.1016/j.chemgeo.2021.120353 ↗
16. Effects of K+ solutions on swelling behavior of compacted GMZ bentonite10.1016/j.enggeo.2018.12.020 ↗
17. Swelling pressure in systems with Na-montmorillonite and neutral surfaces: a molecular dynamics study10.1021/acs.jpcc.7b09496 ↗
18. Coupling of chemical and hydromechanical properties in bentonite10.1016/j.apgeochem.2018.08.013 ↗
19. About differences of swelling pressure — dry density relations of compacted bentonites10.1016/j.clay.2015.02.002 ↗
20. Four electrode resistivity probe for porosity evaluation10.1520/GTJ102866 ↗
21. Electrical conductivity in soils: underlying phenomena10.4133/JEEG8.4.263 ↗
22. Effect of temperature on electrical conductivity of soils–Role of surface conduction10.1016/j.enggeo.2023.107147 ↗
23. Predicting swelling characteristics of bentonites10.1061/(ASCE)1090-0241(2004)130:8(818) ↗
24. Swelling pressures of compacted Ca-bentonite10.1016/j.enggeo.2012.01.005 ↗
25. An empirical swelling pressure kinetics model for bentonite and bentonite-based materials hydrated under constant volume conditions
26. Mechanical behaviour of heavily compacted bentonite under high suction changes10.1680/geot.2003.53.1.27 ↗
27. Diffuse double-layer models, long-range forces, and ordering in clay colloids10.2136/sssaj2002.1207 ↗
28. Mitchell · 2005
29. Predicting the swelling pressure of MX-80 bentonite10.1016/j.clay.2017.08.014 ↗
30. Numerical model of free swelling processes in compacted MX-80 bentonites10.1016/j.ijrmms.2021.104713 ↗
31. Some factors affecting K0-values of sand measured in triaxial cell10.3208/sandf1972.24.3_52 ↗
32. Determining soil salinity from soil electrical conductivity using different models and estimates10.2136/sssaj1990.03615995005400010007x ↗
33. Electrical resistivity survey in soil science: a review10.1016/j.still.2004.10.004 ↗
34. Specific surface: determination and relevance10.1139/t01-077 ↗
35. Feasibility of compacted bentonite barriers in geological disposal of mercury-containing waste10.1016/S0169-1317(03)00102-9 ↗
36. Swelling characteristics of Gaomiaozi bentonite and its prediction10.1016/j.jrmge.2014.01.001 ↗
37. Gypsum precipitation enhanced by electrokinetic method and porewater chemistry in compacted montmorillonite10.1016/j.clay.2018.05.011 ↗
38. Modelling the effects of test conditions on the measured swelling pressure of compacted bentonite10.1016/j.sandf.2018.09.009 ↗
39. A study on the thermal conductivity of compacted bentonites10.1016/j.clay.2007.11.001 ↗
40. Influence of dry density and water content on the swelling of a compacted bentonite10.1016/j.clay.2007.04.007 ↗
41. A diffusion model for the swelling of compacted Na–montmorillonite in water10.1016/j.clay.2021.106301 ↗
42. Estimation of saturated hydraulic conductivity of coarse-grained soils using particle shape and electrical resistivity10.1016/j.jappgeo.2019.05.013 ↗
43. Prediction of swelling characteristics of compacted GMZ bentonite in salt solution incorporating ion-exchange reactions10.1007/s42860-019-00014-3 ↗
44. Swelling deformation of Na-bentonite in solutions containing different cations10.1016/j.enggeo.2020.105757 ↗
45. Temperature dependence of apparent thermal conductivity of compacted bentonites as buffer material for high-level radioactive waste repository10.1016/j.clay.2019.03.017 ↗
46. Swelling pressure of montmorillonite with multiple water layers at elevated temperatures and water pressures: a molecular dynamics study10.1016/j.clay.2020.105924 ↗
47. Influence of salt solutions on the swelling behavior of the compacted GMZ01 bentonite10.1007/s12665-015-4108-1 ↗
48. Influences of salt solutions and salinization-desalinization processes on the volume change of compacted GMZ01 bentonite10.1016/j.enggeo.2017.04.002 ↗
49. Investigation of soil-water characteristic curves for compacted bentonite considering dry density10.1016/j.pnucene.2022.104318 ↗
50. Effective stress incorporating osmotic suction and volume change behavior of compacted GMZ01 bentonite10.1007/s11440-019-00906-7 ↗
51. Influence of salt solutions on the swelling pressure and hydraulic conductivity of compacted GMZ01 bentonite10.1016/j.enggeo.2013.09.001 ↗