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:
  Accelerated Tests Dynamic Modulus Of Elasticity Flexible Pavements Load Tests Mechanistic-empirical Pavement Design Mix Design Pavement Performance Rutting Superpave
• 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.
  
  
• Format:
  PDF
• Funding:
  C1516
• Collection(s):
  University Transportation Centers US Transportation Collection
• Main Document Checksum:
  urn:sha-512:218bebabd7bdb1458a700126f31657b462f7c457138d2c0462ac1e453adbe3956835704eb25fb62069f4cf60a2ceda71b19142e2bfac359fb23471af4d2baba3
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/28110/dot_28110_DS1.pdf
• File Type:
  [PDF - 3.44 MB ]