Review of relationship to predict subgrade modulus from CBR (California bearing ratio)

This report: 1. details the origins of the current Austroads subgrade California bearing ratio (E-CBR) equation; 2. summarises E-CBR equations used overseas; 3. compares the current Austroads E-CBR equation with equations used overseas; 4. discusses limitations with the current Austroads E-CBR equation; 5. details the need for laboratory testing to determine the stress dependency of subgrade modulus for a range of subgrade materials and subgrade CBR values; 6. details the need to incorporate the stress dependency of subgrade modulus in the development of a non-linear finite element model for pavement design. (a)

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    Suite 2, Level 9, 287 Elizabeth Street
    Sydney, New South Wales  Australia  2000
  • Authors:
    • JAMESON, G
  • Publication Date: 2009-3


  • English

Media Info

  • Pagination: 23P
  • Serial:
    • Issue Number: AP-T120/09

Subject/Index Terms

Filing Info

  • Accession Number: 01143858
  • Record Type: Publication
  • Source Agency: ARRB
  • ISBN: 9781921551239
  • Files: ITRD, ATRI
  • Created Date: Nov 16 2009 12:09PM