THE INFLUENCE OF CORE SAMPLE GEOMETRY ON THE AXIAL POINT-LOAD TEST

The authors discuss the use of the point load test as a strength index for rock materials and as a means of estimating the uniaxial compressive strength. It is concluded that: (1) for relatively homogeneous rock material, the diametral point-load test is a reliable means of indexing the rock strength. (2) for rocks possessing near horizontal bedding or foliation, the diametral test is an unreliable indicator of the rock strength and axial testing perpendicular to the bedding is required to give a reliable rock strength index. Tests to study the influence of sample thickness on the axial point-load strength of drill core samples of different diameters are described. A suggested standard test method for determining the point-load strength index is set out. (TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/01489062
• Corporate Authors:

  Pergamon Press, Incorporated

  Headington Hill Hall
  Oxford OX30BW,    
• Authors:
  • Forster, I R
• Publication Date: 1983-12

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 291-295
• Serial:
  • Intl J of Rock Mech & Mining Sci & Geomechanic Abs
  • Volume: 20
  • Issue Number: 6
  • Publisher: Pergamon Press, Incorporated
  • ISSN: 0148-9062

Subject/Index Terms

• TRT Terms: Axis; Bedding; Compression; Compressive strength; Concentrated loads; Core samples; Diameter; Geometry; Isotropy; Measurement; Rocks; Samples; Specifications; Strength of materials; Test procedures; Thickness
• Uncontrolled Terms: Uniaxial compression
• Old TRIS Terms: Coring; Foliations; Point loads; Rock measurement
• ITRD Terms: 6405: Axis; 5532: Compression; 5587: Concentrated loading; 5700: Core (boring); 5917: Isotropic; 6402: Radius; 4154: Rock; 6251: Sample (mater); 177: Specifications; 5544: Strength (mater); 6288: Test method; 5933: Thickness
• Subject Areas: Geotechnology; Highways; I43: Rock Mechanics;

Filing Info

• Accession Number: 00385997
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD, TRIS
• Created Date: Jul 30 1984 12:00AM