Determination of HMA modulus values for use in mechanistic-empirical pavement design

The 2002 Design Guide and software developed by the Minnesota Department of Transportation (MnPAVE) use the complex modulus of hot-mix asphalt (HMA) as a design parameter in the mechanistic design procedure. The complex modulus has also emerged as a promising parameter in evaluating the rutting and the fatigue cracking resistance of asphalt mixtures. This paper investigates the use of the complex dynamic modulus as a design and performance parameter for four of the Minnesota Road Research Project (Mn/ROAD) test cells. Experimental data was obtained at six temperatures and master curves were developed. The experimental data was further compared and correlated to falling weight deflectometer (FWD) data and field performance data to better understand the role of the complex dynamic modulus of asphalt mixtures with respect to field performance. In addition, FWD data was used to determine the effects of cracking on the design modulus of existing HMA pavements for overlay design. The result is a modulus reduction factor (MRF) that can be applied to complex modulus values to account for the increased deflections near cracks in existing HMA pavements.

Language

  • English

Media Info

  • Pagination: 24p
  • Monograph Title: Full scale accelerated pavement testing: a southern hemisphere and Asian perspective

Subject/Index Terms

Filing Info

  • Accession Number: 01389241
  • Record Type: Publication
  • Source Agency: ARRB
  • Files: ITRD, ATRI
  • Created Date: Aug 23 2012 3:16AM