THE GYRATORY TESTING MACHINE AS A DESIGN TOOL AND AS AN INSTRUMENT FOR BITUMINOUS MIXTURE EVALUATION

Two types of aggregates, limestone and gravel and a 60-70 penetration grade asphalt were used in a study to evaluate gyratory testing machine (GTM) design method, and to study the capability of the machine to evaluate bituminous mixes at any specified densification effort. The sensitivity of the GTM when used to study the job mix formula tolerances was also investated. Details of the bituminous mixture design are set forth, and the test results are tabulated. Analysis of the results lead to the conclusion that (for the given materials and procedures) bitumionus mixtures can be effectively designed based on their compaction and shear strain properties obtained by means of the GTM using the tenative ASTM testing method. The GTM can be used as a laboratory traffic simulation device to measure changes in compaction and shear strain properties of bituminous mixtures to be expected when they are placed in service. It is also concluded that the sensitivity of bituminous mixtures with respect to variations in gradation and asphalt content can be studied through the use of the GTM. This in turn can help modify the job mix formula tolerances to suit particular field conditions.

Media Info

  • Features: Appendices; Figures; Photos; References; Tables;
  • Pagination: p. 350-383
  • Serial:
    • Volume: 43

Subject/Index Terms

Filing Info

  • Accession Number: 00125408
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Oct 18 2000 12:00AM