Manufacturing method for meter-scale buffer material blocks

CAO Shengfei; LIU Yuemiao; XIE Jingli; GAO Yufeng; ZHANG Qi; TONG Qiang

doi:10.11779/CJGE20221025

Volume 45 Issue 11

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Chinese Journal of Geotechnical Engineering > 2023 > 45(11): 2411-2419. > DOI: 10.11779/CJGE20221025

CAO Shengfei, LIU Yuemiao, XIE Jingli, GAO Yufeng, ZHANG Qi, TONG Qiang. Manufacturing method for meter-scale buffer material blocks[J]. Chinese Journal of Geotechnical Engineering, 2023, 45(11): 2411-2419. DOI: 10.11779/CJGE20221025

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Manufacturing method for meter-scale buffer material blocks

CAO Shengfei^{1, 2,},
LIU Yuemiao^{1, 2},
XIE Jingli^{1, 2},
GAO Yufeng^{1, 2},
ZHANG Qi^{1, 2},
TONG Qiang^{1, 2}

1.
Beijing Research Institute of Uranium Geology, Beijing 100029, China
2.
CAEA Innovation Center for Geological Disposal of High-Level Radioactive Waste, Beijing 100029, China

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Received Date: August 18, 2022
Available Online: March 09, 2023

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Abstract

Abstract

In the high-level radioactive waste (HLW) repository, the canisters are usually surrounded by buffer materials in the form of blocks. The manufacturing method for large-scale buffer blocks is regarded as a difficult problem to be solved in the in-situ tests and the safety operation of HLW repository. The manufacturing of large-scale buffer blocks with Gaomiaozi (GMZ) bentonite and the physical properties of blocks are studied. The buffer blocks are compacted under three loading rates and holding time, and the effects of the loading rates and holding time on the integrity and homogeneity of the buffer blocks are analyzed. By cutting and coring different sections of the buffer blocks, it is found that the dispersion of physical properties such as dry density and water content is small, indicating that the buffer blocks are quite homogeneous. The key manufacturing technology of large-scale buffer blocks is established by considering the integrity, homogeneity and productivity of the blocks comprehensively. Then, the meter-scale buffer blocks which are suitable for the engineering conditions are well produced. The research results may provide a technical support and scientific basis for the in-situ tests of buffer materials in the underground research laboratory.
- buffer material,
- meter-scale bentonite block,
- manufacturing method,
- physical property test

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References (18)

References

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