For a complete description of the stress/strain behaviour of asphalt mixes, which are granular materials bound with bitumen, two complementary parameters are required, which can be the stiffness modulus and the strain ratio. These characteristic properties are analogous to Young' modulus and Poisson's ratio of elastic materials. The strain ratio of asphalt mixes may be determined indirectly by combining the results of tension and compression tests. A consequence of this is that the angle of internal friction derived from the results of triaxial tests can be interpreted in a new way as being related to the strain ratio for small strains, which in turn is shown to be a function of the voids content of the mix and the stiffness modulus of the binder. It then becomes apparent that some of the tests used for mix design yield information of a similar nature and that consequently there is more freedom in the choice of such tests than may have been thought previously.

  • Supplemental Notes:
    • This paper was first published in the Journal of the Institute of Petroleum, January 1969, 55 (541).
  • Corporate Authors:

    Shell International Petroleum Company Limited

    Shell Center
    London SE1 7NA,   England 
  • Authors:
    • Hills, J F
    • Heukelom, W
  • Publication Date: 0


  • English

Media Info

  • Features: Figures; Tables;
  • Pagination: 8 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00081424
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Apr 22 1975 12:00AM