Insight on intrusion behavior of compacted bentonite with accessory-mineral ring: a modelling approach
Investigating the intrusion behavior of buffer/backfill materials is a critical aspect in the design of high-level radioactive waste (HLW) disposal repositories. This study proposes an intrusion model that accounts for the influence of the accessory-mineral ring and refines it by incorporating the s...
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Frontiers Media S.A.
2025-01-01
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| Series: | Frontiers in Materials |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fmats.2025.1541770/full |
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| author | Libo Xu Libo Xu Junneng Ye Yanming Yao |
| author_facet | Libo Xu Libo Xu Junneng Ye Yanming Yao |
| author_sort | Libo Xu |
| collection | DOAJ |
| description | Investigating the intrusion behavior of buffer/backfill materials is a critical aspect in the design of high-level radioactive waste (HLW) disposal repositories. This study proposes an intrusion model that accounts for the influence of the accessory-mineral ring and refines it by incorporating the specimen saturation process. The results show that the model demonstrated good agreement with the measured values after 30 days, but less accurate prior to this time. After incorporating a correction for the specimen’s saturation process, the model could well predict the measured values throughout the whole intrusion process. Additionally, the study suggests that predictions under parallel montmorillonite plates may be lower compared to non-parallel plates. The accessory-mineral ring significantly inhibits bentonite intrusion, and its restraining effect increases with the ring’s width. Compared to the smooth acrylic fissures, the irregular fractures in actual disposal repositories further limit bentonite intrusion. Fracture water seepage restricts bentonite intrusion in the upper part of the specimen while promoting it in the lower part, and also enhances the inhibiting effect of the accessory-mineral ring. The extent of this effect depends on the water flow velocity. Furthermore, increasing temperature promotes bentonite intrusion. |
| format | Article |
| id | doaj-art-127a21c1edae4f458270cde71375acf8 |
| institution | Kabale University |
| issn | 2296-8016 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Frontiers Media S.A. |
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| series | Frontiers in Materials |
| spelling | doaj-art-127a21c1edae4f458270cde71375acf82025-01-30T06:23:01ZengFrontiers Media S.A.Frontiers in Materials2296-80162025-01-011210.3389/fmats.2025.15417701541770Insight on intrusion behavior of compacted bentonite with accessory-mineral ring: a modelling approachLibo Xu0Libo Xu1Junneng Ye2Yanming Yao3Key Laboratory of Soft Soils and Geoenvironmental Engineering, MOE, Department of Civil Engineering, Zhejiang University, Hangzhou, ChinaNingbo Rail Transit Group Co., Ltd., Ningbo, ChinaNingbo Rail Transit Group Co., Ltd., Ningbo, ChinaNingbo Rail Transit Group Co., Ltd., Ningbo, ChinaInvestigating the intrusion behavior of buffer/backfill materials is a critical aspect in the design of high-level radioactive waste (HLW) disposal repositories. This study proposes an intrusion model that accounts for the influence of the accessory-mineral ring and refines it by incorporating the specimen saturation process. The results show that the model demonstrated good agreement with the measured values after 30 days, but less accurate prior to this time. After incorporating a correction for the specimen’s saturation process, the model could well predict the measured values throughout the whole intrusion process. Additionally, the study suggests that predictions under parallel montmorillonite plates may be lower compared to non-parallel plates. The accessory-mineral ring significantly inhibits bentonite intrusion, and its restraining effect increases with the ring’s width. Compared to the smooth acrylic fissures, the irregular fractures in actual disposal repositories further limit bentonite intrusion. Fracture water seepage restricts bentonite intrusion in the upper part of the specimen while promoting it in the lower part, and also enhances the inhibiting effect of the accessory-mineral ring. The extent of this effect depends on the water flow velocity. Furthermore, increasing temperature promotes bentonite intrusion.https://www.frontiersin.org/articles/10.3389/fmats.2025.1541770/fullbuffer/backfill materialsintrusionbentoniteaccessory-mineral ringsaturation |
| spellingShingle | Libo Xu Libo Xu Junneng Ye Yanming Yao Insight on intrusion behavior of compacted bentonite with accessory-mineral ring: a modelling approach Frontiers in Materials buffer/backfill materials intrusion bentonite accessory-mineral ring saturation |
| title | Insight on intrusion behavior of compacted bentonite with accessory-mineral ring: a modelling approach |
| title_full | Insight on intrusion behavior of compacted bentonite with accessory-mineral ring: a modelling approach |
| title_fullStr | Insight on intrusion behavior of compacted bentonite with accessory-mineral ring: a modelling approach |
| title_full_unstemmed | Insight on intrusion behavior of compacted bentonite with accessory-mineral ring: a modelling approach |
| title_short | Insight on intrusion behavior of compacted bentonite with accessory-mineral ring: a modelling approach |
| title_sort | insight on intrusion behavior of compacted bentonite with accessory mineral ring a modelling approach |
| topic | buffer/backfill materials intrusion bentonite accessory-mineral ring saturation |
| url | https://www.frontiersin.org/articles/10.3389/fmats.2025.1541770/full |
| work_keys_str_mv | AT liboxu insightonintrusionbehaviorofcompactedbentonitewithaccessorymineralringamodellingapproach AT liboxu insightonintrusionbehaviorofcompactedbentonitewithaccessorymineralringamodellingapproach AT junnengye insightonintrusionbehaviorofcompactedbentonitewithaccessorymineralringamodellingapproach AT yanmingyao insightonintrusionbehaviorofcompactedbentonitewithaccessorymineralringamodellingapproach |