Thermal Impact on Damaged Boom Clay and Opalinus Clay: Permeameter and Isostatic Tests with μCT Scanning

被引：33

作者：

Chen, G. J. ^{[1
]}

Maes, T. ^{[2
]}

Vandervoort, F. ^{[2
]}

Sillen, X. ^{[2
]}

Van Marcke, P. ^{[1
]}

Honty, M. ^{[2
]}

Dierick, M. ^{[3
]}

Vanderniepen, P. ^{[3
]}

机构：

[1] SCK CEN, European Underground Res Infrastruct Disposal Nuc, B-2400 Mol, Belgium

[2] SCK CEN, Belgian Nucl Res Ctr, B-2400 Mol, Belgium

[3] Univ Ghent, B-9000 Ghent, Belgium

来源：

ROCK MECHANICS AND ROCK ENGINEERING | 2014年 / 47卷 / 01期

关键词：

Thermal impact; Sealing; Healing; Damaged; Boom Clay; Opalinus Clay; Permeameter test; Isostatic test;

D O I：

10.1007/s00603-012-0334-y

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

Within the framework of the TIMODAZ project, permeameter tests and isostatic tests were performed on Boom Clay and Opalinus Clay in order to assess the impact of temperature, pore water composition, and confining stress on the sealing of damaged samples of Boom Clay and Opalinus Clay. A microfocus X-ray computed tomography technique was used to visualize the evolution of the sealing process. Compared to the fast sealing of Boom Clay, the sealing of Opalinus Clay was much slower. The heating showed a significant, favorable impact on the sealing behavior of Opalinus Clay under permeameter test conditions, while the sealing behavior of Boom Clay appeared to be unaffected. Tests performed under isostatic conditions did not reveal a significant influence of a heating-cooling cycle on the sealing behavior of these clays. The reappearance of the fractures or holes in the samples after dismantling confirms earlier observations which showed that after sealing, the original mechanical properties are not recovered. In other words, a heating cycle does not seem to induce healing.

引用

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页码：87 / 99

页数：13

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