EVALUATION OF MARSHALL DESIGN METHOD: A COMPARATIVE ANALYSIS

Specimens compacted by 50-blow Marshall and by Gyratory Testing Machine (GTM) were tested at 60C to determine Marshall stability and flow values. It was observed that the GTM-prepared specimens had lower stability and higher flow values than the Marshall specimens when compacted to densities equal to the GTM. Three categories (levels) of gyratory shear (Gs) were used to prepare linear stability-flow relationships for GTM-densified specimens (200 revolutions). These results indicated that the stability-flow ratio could change substantially without much change in Gs. It was concluded that the stability/flow ratio is not a reliable indicator of mixture stiffness nor is it related to shear strength. Furthermore, it was found that samples with air void contents and Gs values greater than 4% and 345 kPa, respectively, produced almost identical stability-flow relationships. (A) For the covering abstract of the conference see IRRD 873950.

Language

  • English

Media Info

  • Features: References;
  • Pagination: III216-III228

Subject/Index Terms

Filing Info

  • Accession Number: 00714405
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD
  • Created Date: Dec 27 1995 12:00AM