The permeability of an intact granite

The permeability of intact Barre granite is determined by conducting transient hydraulic pulse tests that induce radial flow in saturated granite cylinders containing a water-filled co-axial cavity. Saturated specimens of granite are also subjected to uniform heating on the outer cylindrical surface...

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Bibliographic Details
Published in:Pure and applied geophysics 2005-02, Vol.162 (2), p.373-407
Main Authors: SELVADURAI, A. P. S, BOULON, M. J, NGUYEN, T. S
Format: Article
Language:English
Subjects:
Alterations
Applied geophysics
Crystalline rocks
Decay
Earth sciences
Earth, ocean, space
Exact sciences and technology
Fluid dynamics
Granite
Heating
Holes
Igneous and metamorphic rocks petrology, volcanic processes, magmas
Internal geophysics
Laboratory tests
Mathematical analysis
Permeability
Stone
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Summary:The permeability of intact Barre granite is determined by conducting transient hydraulic pulse tests that induce radial flow in saturated granite cylinders containing a water-filled co-axial cavity. Saturated specimens of granite are also subjected to uniform heating on the outer cylindrical surface and the permeability of the granite is measured at the termination of a heating sequence. The theoretical basis for the use of simplified analytical solutions for evaluating the decay of the pressure pulse is examined and the permeability of the granite in the pre-heating and post-heating states is inferred from the results of pulse tests. The reported investigations document one of the limited numbers of large-scale laboratory tests conducted to determine the permeability characteristics of intact granite. The results of the permeability measurements indicate the absence of any appreciable influences of micro structural alterations in the fabric of the granite due to its heating in a saturated condition, at an average temperature of 140 °Celsius.[PUBLICATION ABSTRACT]
ISSN:0033-4553
1420-9136
DOI:10.1007/s00024-004-2606-2