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Investigation of Rock Samples Using X-Ray-Microcomputer-Tomography Before and After Mercury Intrusion Porosimetry

Published online by Cambridge University Press:  03 September 2012

P. Klobes ,
H. Riesemeier ,
K. Meyer ,
J. Goebbels ,
M. Siitari-Kauppi  and
K-H. Hellmuth
P. Klobes
Affiliation:
Federal Institute for Materials Research and Testing (BAM), Unter den Eichen 87, D-12200 Berlin, Germany
H. Riesemeier
Affiliation:
Federal Institute for Materials Research and Testing (BAM), Unter den Eichen 87, D-12200 Berlin, Germany
K. Meyer
Affiliation:
Federal Institute for Materials Research and Testing (BAM), Unter den Eichen 87, D-12200 Berlin, Germany
J. Goebbels
Affiliation:
Federal Institute for Materials Research and Testing (BAM), Unter den Eichen 87, D-12200 Berlin, Germany
M. Siitari-Kauppi
Affiliation:
Laboratory of Radiochemistry, University of Helsinki, PO Box 55, FIN-00014 University of Helsinki, Finland
K-H. Hellmuth
Affiliation:
Finnish Centre for Radiation and Nuclear Safety, PO Box 14, FIN-00881 Helsinki, Finland
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Abstract

A new method for the physical characterization of rock matrices for use in site investigations of nuclear waste repositories has been developed. The method can provide information needed in the assessment of the performance of the geosphere working as a natural barrier retarding the migration of radionuclides by diffusion into the rock matrix. Most conventional methods for the physical characterization of rocks give only bulk information. The combination of mercury po-rosimetry and computer tomography can give 3-D data on mineral-specific porosity distributions with additional pore size information. Additionally, limits for mineral-specific internal surface areas can be estimated, which is essential for the assessment of water-rock interaction and reactive interaction with radionuclides (sorption). Results of measurements on granitic rock (granodiorite) from the Baltic shield are discussed and integrated with results by complementary methods.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 465: Symposium II – Scienfific Basis for Nuclear Waste Management XX , 1996 , 863
Copyright
Copyright © Materials Research Society 1997

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References

REFERENCES

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