Quantifying the Influence of Geosynthetics on Pavement Performance

Procedures that quantify the influence of geosynthetics on pavement performance will help in determining the payoff of using these materials and selecting the appropriate material for a specific application. This project was initiated to (a) evaluate tests currently used for characterizing geosynthetics and identify how tests relate to performance, and (b) develop a methodology for quantifying the influence of geosynthetics on performance for use in pavement design and analysis. This information can be incorporated into the AASHTOWare Pavement ME Design software, thus allowing a rational analysis and design procedure of flexible and rigid pavements in which geosynthetics are used in conjunction with unbound bases and subbases. The project was divided into six components: (a) full-scale laboratory testing of typical asphalt and concrete pavement sections in an instrumented large-scale tank (LST); (b) laboratory triaxial testing of different base courses with geosynthetics at different locations within the test samples; (c) finite element computations to match the results of the full-scale tests; (d) use of the same finite element program to develop full factorial sets of pavement data to construct the Artificial Neural Network (ANN) models of the critical strains and stresses in pavements; (e) generation of a new model of permanent deformation to predict pavement performance; and (f) comparison of the predicted performance of pavements with and without geosynthetics embedded in the unbound base courses. The deliverables of this project included a computer subroutine written for incorporation into the Pavement ME Design software to predict the performance of pavements with geosynthetics, testing protocols that produced the geosynthetic property and modified base course property inputs for the Pavement ME Design software that were needed to accurately predict their influence on pavement performance, and the complete set of measured data in electronic form.

Language

  • English

Media Info

  • Media Type: Web
  • Edition: Contractor's Final Report
  • Features: Appendices; Figures; Photos; References; Tables;
  • Pagination: 841p
  • Serial:
  • Publication flags:

    Open Access (libre)

Subject/Index Terms

Filing Info

  • Accession Number: 01643077
  • Record Type: Publication
  • Report/Paper Numbers: NCHRP Project 01-50
  • Files: TRIS, TRB, ATRI
  • Created Date: Aug 4 2017 3:16PM