Three Years of Dynamic Modulus Testing of Asphalt Mixes

The dynamic modulus (E*) of an asphalt mix characterizes its stiffness response under sinusoidal loading. E* is a key input parameter into the Mechanistic-Empirical Pavement Design Guide (MEPDG) and is a required parameter for a Level 1 design. It is also a parameter with which most practitioners have little experience. In anticipation of the future implementation of the MEPDG, in 2005, Alberta Transportation established an annual E* testing program of select asphalt concrete pavement mixtures. The intent of this testing was to develop some background on the range of values that might be expected and to confirm the ability of E* to differentiate between different mix types. This paper documents the testing that Alberta Transportation has undertaken to date, including some trials with only duplicate samples, as well as some trials using four-inch thick samples. The results of the E* testing, the E* master curves, and a comparison of the results to those obtained through the Witczak predictive equation are also presented. (A)

Language

  • English

Media Info

  • Pagination: p. 247-270

Subject/Index Terms

Filing Info

  • Accession Number: 01149492
  • Record Type: Publication
  • Source Agency: Transportation Association of Canada (TAC)
  • Files: TAC
  • Created Date: Jan 28 2010 7:32AM