Verification of mechanistic-empirical design models for flexible pavements through accelerated pavement testing.

Details

• Creators:
  Romanoschi, Stefan ; Lewis, Paul ; Gedafa, Daba ; Hossain, Mustaque
• Corporate Creators:
  Kansas State University. Transportation Center
• Corporate Contributors:
  United States. Federal Highway Administration
• Subject/TRT Terms:
  • Mechanistic-empirical pavement design
  • Flexible pavements
  • Pavement performance
  • Dynamic modulus of elasticity
  • Superpave
  • Mix design
  • Accelerated tests
  • Load tests
  • Rutting
• Publication/ Report Number:
  FHWA-KS-14-02
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Corporate Publisher:
  Kansas. Dept. of Transportation. Bureau of Materials & Research
• Abstract:
  The Midwest States Accelerated Pavement Testing Pooled Fund Program, financed by the highway ; departments of Kansas, Iowa, and Missouri, has supported an accelerated pavement testing (APT) project to ; validate several models incorporated in the NCHRP 1-37A design method, popularly known as Mechanistic-Empirical Pavement Design Guide (MEPDG) for flexible pavements. The following models were investigated: ; the dynamic modulus estimation model, the relationship between the dynamic modulus and the pavement ; response; and the relationship between the pavement response (strains) and pavement performance. In addition to ; these, the experiment aims to compare the performance of the coarse and fine Superpave mixes, and to validate ; and calibrate the Asphalt Pavement Analyzer (APA) and Hamburg Wheel-Tracking Device Tester as screening ; tools for estimating rutting performance of Superpave asphalt mixes. ; The experiments were conducted at the Civil Infrastructure Systems Laboratory at Kansas State ; University. The test program consisted of constructing 12 flexible pavement structures and subjecting them to ; full-scale accelerated loading tests. The experiment found that the revised Witczak model predicts the dynamic ; modulus of asphalt concrete mixes with reasonable accuracy. The MEPDG structural response model under-predicted the longitudinal strains at the bottom of the asphalt concrete layers, while the MEPDG over-predicted ; the permanent deformation in the asphalt layer. The comparison between the results of the laboratory rutting tests ; performed at 35°C indicate that results of the Hamburg Wheel Rut Test correlate best with results of the APT ; experiment, followed by those from the APA.
  More +
• Format:
  PDF
• Funding:
  C1516
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/28110/dot_28110_DS1.pdf
• File Type:
  [PDF - 3.44 MB]
• Collection(s):
  University Transportation Centers ; US Transportation Collection
• Main Document Checksum:
  urn:sha-512:218bebabd7bdb1458a700126f31657b462f7c457138d2c0462ac1e453adbe3956835704eb25fb62069f4cf60a2ceda71b19142e2bfac359fb23471af4d2baba3