MEASUREMENT OF THE AVERAGE PORE VELOCITY OF WATER SEEPING THROUGH A ROCK SAMPLE

This article describes a method for measuring the modified permeability, which is derived from the mean value of the pore velocity instead of the mean value of the filter velocity. The modified permeability is of interest in many applications, for example in the case of erosion arising from high velocity water jets. The principle of the method consists in the fact that a small quantity of ions at a particular time is fed into the water passing through a rock sample, and simultaneously the electrical current in the direction of the pressure gradient is recorded. The recorded current signal shows a sharp increase after a certain time. This time makes it possible, to calculate the mean value of the pore velocity. Experiments were carryed out with three Swedish rocks: lemunda-sandstone, bous granite and Stockholm granite. The result shows that the permeability of the granite is considerably lower than that of the sandstone. (TRRL)

• Corporate Authors:

  Springer Verlag

  175 5th Avenue
  New York, NY  United States  10010
• Authors:
  • Rehbinder, G
• Publication Date: 1978-6

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 19-28
• Serial:
  • Rock Mechanics
  • Volume: 11
  • Issue Number: 1

Subject/Index Terms

• TRT Terms: Average; Flow; Fluid dynamics; Granite; Ions; Measurement; Methodology; Permeability; Pore water pressures; Porosity; Rocks; Samples; Sandstones; Speed; Water
• ITRD Terms: 6549: Average; 5430: Flow (fluid); 4101: Granite; 7134: Ion; 6136: Measurement; 9102: Method; 5921: Permeability; 5762: Pore water pressure; 5938: Porosity; 4154: Rock; 6251: Sample (mater); 4104: Sandstone; 5408: Speed; 4355: Water
• Subject Areas: Geotechnology; Highways; I43: Rock Mechanics;

Filing Info

• Accession Number: 00309346
• Record Type: Publication
• Source Agency: Bundesanstalt für Straßenwesen (BASt)
• Files: ITRD, TRIS
• Created Date: May 21 1980 12:00AM