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The primary concern of this work is the migration of gases in cementitious materials. The migration of hydrogen, methane and carbon dioxide were studied. In addition, helium and argon were used in experiments where the use of flammable gases would pose a significant risk. The objectives of the work were to develop experimental methods for the measurement of gas migration in cementitious materials by both the bulk flow and diffusion mechanisms, and to carry out such measurements. The gas migration rates for the gases listed above were determined for a range of appropriate materials. The impact of a variety of parameters was investigated, in particular the gas pressure, degree of water saturation of the material and the effect of interfaces within the specimens. The data were interpreted in terms of the pore structures of the materials. A model was developed which describes the cracking of the cementitious materials due to the stress generated by gas pressurisation. The experimental data were used in the model to predict the behaviour of a repository.

Additional information

Authors: HARRIS A W, AEA Technology, Harwell Laboratory, Didcot, Oxon. (GB);ATKINSON A, AEA Technology, Harwell Laboratory, Didcot, Oxon. (GB);CLAISSE P A, University of Dundee, Department of Civil Engineering (GB)
Bibliographic Reference: EUR 14194 EN (1993) 83 pp., FS, ECU 10.50
Availability: (2)
ISBN: ISBN 92-826-5240-8
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