Prediction of Flexible Pavement’s Unbound Granular Materials Using Elasto-Plastic Model SANISAND

Unbound granular materials are used as base and subbase for flexible pavements, particularly for low traffic and heavy loads. The performance of these materials are measured by accumulation of permanent deformation, which leads to pavement rutting. Prediction of rutting is very important in pavement design and for preventive maintenance programs, hence there is a strong need to develop and introduce in practice more appropriate and sound models to predict permanent deformation. This paper presents a numerical approach to predict permanent deformation of unbound granular material using an elasto-plastic approach, based on the constitutive model SANISAND, which was developed by Dafalias and Manzari. The constitutive model is compatible with the concept of critical state soil mechanics and is based on the theory of bounding surface plasticity. Simulations using the model are verified against experimental data conducted on recycled concrete aggregates for application as pavement materials. The results of the preliminary verification are promising.

Language

  • English

Media Info

  • Media Type: Web
  • Pagination: pp 481-492
  • Monograph Title: Airfield and Highway Pavements 2019: Testing and Characterization of Pavement Materials

Subject/Index Terms

Filing Info

  • Accession Number: 01728586
  • Record Type: Publication
  • ISBN: 9780784482469
  • Files: TRIS, ASCE
  • Created Date: Jul 18 2019 3:03PM