U.S. flag An official website of the United States government.
Official websites use .gov

A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS

A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

i

Dynamic modulus of hot mix asphalt : final report, June 2009.

File Language:
English


Details

  • Creators:
    Bennert, Thomas
  • Corporate Creators:
    Rutgers University. Center for Advanced Infrastructure and Transportation
  • Corporate Contributors:
    New Jersey Department of Transportation
  • Subject/TRT Terms:
  • Publication/ Report Number:
    FHWA-NJ-2009-011
  • Resource Type:
    Tech Report
  • Geographical Coverage:
    New Jersey
  • Edition:
    Final report; Jan. 2007-June 2009.
  • Corporate Publisher:
    New Jersey. Dept. of Transportation
  • Abstract:
    One of the most critical parameters needed for the upcoming Mechanistic Empirical Pavement Design Guide ; (MEPDG) is the dynamic modulus (E*), which will be used for flexible pavement design. The dynamic modulus ; represents the stiffness of the asphalt material when tested in a compressive-type, repeated load test. The ; dynamic modulus is one of the key parameters used to evaluate both rutting and fatigue cracking distresses in ; the MEPDG. The computer software that accompanies the MEPDG also provides general default parameters for ; the dynamic modulus (i.e. – Level 2 and 3 inputs). However, caution has already been issued by the National ; Cooperative Highway Research Program (NCHRP) researchers as to the appropriateness of these parameters ; for regional areas. The major concern is that state agencies will use these default values blindly and sacrifice ; accuracy of the design. Hence, making the new mechanistic procedure no better than using a structural number ; (SN) with the old AASHTO method. ; There were three primary objectives of the research study. First, the current version of the dynamic modulus ; test, AASHTO TP62-07, was evaluated to determine the relative precision of the test method, and if required, ; recommend a modified procedure with better precision. The second objective of the study was to develop a ; dynamic modulus catalog for use with the Mechanistic Empirical Pavement Design Guide (MEPDG) by testing ; plant-produced and laboratory-compacted samples of various asphalt mixtures. This would supercede Level 2 ; inputs currently in the MEPDG for New Jersey. The third primary objective of the research study was to assess ; the accuracy of two commonly utilized dynamic modulus prediction equations; 1) Witczak Prediction Equation ; and 2) Hirsch Model. The database developed during the study also led to the development of correlations ; between dynamic modulus and fatigue cracking and rutting performance of asphalt mixtures.
  • Format:
    PDF
  • Download URL:
    https://rosap.ntl.bts.gov/view/dot/17674/dot_17674_DS1.pdf
  • File Type:
    Filetype[PDF - 891.33 KB]
  • Collection(s):
    University Transportation Centers ; US Transportation Collection
  • Main Document Checksum:
    urn:sha256:5cbfa2e4e18421079d439158f71b7276c863b2cb1c840c18aa4209e2ac17959b
PREVIOUS
File Language:
English
ON THIS PAGE
Details
 Found an issue?
Send us an email at:
publishinghd@cdc.gov
ROSA P serves as an archival repository of USDOT-published products including scientific findings, journal articles, guidelines, recommendations, or other information authored or co-authored by USDOT or funded partners. As a repository, ROSA P retains documents in their original published format to ensure public access to scientific information.
BACK TO TOP