Preliminary plastic deformation analysis of unbound layer from the California accelerated pavement test program

This paper presents a preliminary analysis of the plastic deformation of unbound materials used in selected flexible pavement sections tested under full-scale tests at the University of California, Pavement Research Center. Elastic and plastic deformation measured during testing at layer interfaces within the pavement were processed and analyzed to related estimated layer moduli and pavement responses to plastic deformation using a phenomenological plastic deformation model. The model is includes vertical stress, and number of load applications and is used in a recursive format for estimating plastic deformations. The preliminary results indicate that it is possible to predict plastic deformations in the unbound materials by proper selection of model coefficients through material characterization. An evaluation of the vertical strain criteria indicated that for the conditions of the full-scale tests, subgrade plastic deformation was prevented but not plastic deformation in the other layers, particularly the aggregate base and asphalt concrete layers.

Language

  • English

Media Info

  • Pagination: 18p
  • Monograph Title: Full scale accelerated pavement testing: a southern hemisphere and Asian perspective

Subject/Index Terms

Filing Info

  • Accession Number: 01389238
  • Record Type: Publication
  • Source Agency: ARRB
  • Files: ITRD, ATRI
  • Created Date: Aug 23 2012 3:16AM