Resilient modulus characterisation of granular unbound pavement materials, report no 1

This report describes the development of affordable test equipment together with a test procedure suited to producing vertical modulus, Poissons ratio and permanent strain for use in the mechanistic design process. The equipment has been manufactured and assembled principally from standard components comprising a loading frame with pneumatic vertical repeated load and static lateral stress (manufactured by Department of Road Transport) and triaxial cell, strain transducers, signal conditioning and data logging (electronic) assemblies being manufactured and purchased to Department of Road Transport specifications. Because the stiffness properties of granular materials are dependent upon the stress regime, a carefully controlled sequence of loading is required. Rather than reporting a single modulus value, a plot is produced showing the variation of stiffness with mean normal stress and inverse stress ratio. Further plots showing the effect of varying conditions, such as density and moisture content, can also readily be produced. These plots can be used directly by pavement designers to input values into the mechanistic analysis for complete prediction of pavement behaviour. Results have shown that there are great differences between materials from different sources which can significantly influence a pavement's performance.

  • Corporate Authors:

    South Australia. Department of Road Transport. Materials, Technology Research and Development Programme

    Adelaide, South Australia   
  • Authors:
    • Mundy, M
  • Publication Date: 1991-1

Language

  • English

Media Info

  • Pagination: 27p + appendices
  • Serial:
    • Issue Number: 16-Jan

Subject/Index Terms

Filing Info

  • Accession Number: 01432258
  • Record Type: Publication
  • Source Agency: ARRB
  • Files: ATRI
  • Created Date: Aug 24 2012 4:55PM