期刊
ENGINEERING GEOLOGY
卷 117, 期 3-4, 页码 180-188出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.enggeo.2010.10.016
关键词
X-ray computed tomography; Rock quality index; Rock classification; Weak rock; Cataclastic carbonate rock; Rock core sample
资金
- Swiss National Science Foundation [2100-63, 640.00]
X-ray computed tomography (XRCT) can reconstruct, in a nondestructive way and in three-dimension, the distribution of densities within opaque materials. Consequently, it provides an effective possibility to characterize the inner content of rock core samples and, in particular their alteration products sensu lato which generally appear less dense than the intact rock matrix. In this paper, a new index, based on XRCT data, is tested for evaluating the degree of alteration of highly tectonized carbonate rock samples and is compared with visual-based classification systems. This XRCT-based analysis leads to a diagnosis of alteration which appears objective, precise and in agreement with the visual observations. Besides, this method takes into account the entire volume of the sample, is rapid to carry out and allows an intact rock core to be used for further laboratory testing. (C) 2010 Elsevier B.V. All rights reserved.
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