STRESS-STRAIN BEHAVIOUR OF LARGE SPECIMENS OF MUDSTONE

The stress-strain behaviour of large (165 mm diameter, 270 mm length) specimens of mudstone has been studied in the triaxial compression test. The specimens were prepared from vertical and inclined zf cores obtained from close to the Kielder experimental tunnel in County Durham, England. All specimens were tested under effective stress conditions; some multi-stage and some single stage tests were carried out; and the cell pressures used were consistent with the stress conditions developed around underground excavations. In addition to axial strain, volumetric strain was measured. It is considered that the large specimen size in relation to the spacing of bedding plane partings and joints in the rock means that the rock mass properties which are important from the engineering point of view, rather than the rock material properties have been determined. The measurement of volumetric strain during the test allowed the results from one specimen to be analysed using critical state theory, in particular to see if the measured strain vectors complied with the condition of normality of the associated flow rule. (Author/TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/02665247
• Corporate Authors:

  Transport and Road Research Laboratory (TRRL)

  Wokingham, Berkshire  United Kingdom 
• Authors:
  • WEST, G
  • MCLAREN, D
  • Brown, E T
• Publication Date: 1985

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: 13 p.
• Serial:
  • TRRL RESEARCH REPORT
  • Issue Number: RR23
  • Publisher: Transport and Road Research Laboratory (TRRL)
  • ISSN: 0266-5247

Subject/Index Terms

• TRT Terms: Compression; Deformation curve; Effective stress; Mass; Mechanical strain; Mud; Mudstones; Rocks; Stresses; Structural analysis; Tests; Triaxial shear tests; Volumetric analysis
• Uncontrolled Terms: Critical state; Rock mass; Triaxial compression
• Geographic Terms: United Kingdom
• Old TRIS Terms: Strains
• ITRD Terms: 5532: Compression; 5595: Deformation; 4179: Mud; 5575: Stress (in material); 5573: Stress analysis; 6255: Test; 5566: Triaxial; 8119: United Kingdom; 7142: Volumetric analysis
• Subject Areas: Geotechnology; Highways;

Filing Info

• Accession Number: 00451408
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Report/Paper Numbers: NRR 8
• Files: ITRD, TRIS, ATRI
• Created Date: May 31 1986 12:00AM