REVIEW OF MODELLING THE MECHANICAL PARAMETERS OF ASPHALT MATERIAL

In the determination of the mechanical parameters (Young's, shear, bulk modulus and Poisson's ratio) one should account for the visco- elastic nature of asphalt materials. In this paper, attention is paid to the various models that can be used to do so. It is proposed that, for material characterisation purposes, the visco-elastic behaviour of Young's modulus and ofthe shear modulus is described by a Burgers' model (also called a Voight-Kelvin model). The other two material parameters can be derived from these. This way, ambiguous determination of these important material parameters is prevented. In road design, using linear elastic multilayer programs, one cannot account for the viscous effects and thus one has to use 'effective elastic parameters'. It is suggested that these can be derived fromthe more generally valid, visco-elastic ones by applying a frequency of 8Hz. Furthermore, simple test set-ups to determine the parameters experimentally are described. (a) For the covering abstract of this conference see IRRD abstract no. 861222.

Language

  • English

Media Info

  • Features: References;
  • Pagination: p. 317-31

Subject/Index Terms

Filing Info

  • Accession Number: 00669764
  • Record Type: Publication
  • Source Agency: ARRB
  • Files: ITRD, ATRI
  • Created Date: Dec 23 1994 12:00AM