Review and analysis of Hamburg Wheel Tracking device test data.

Details

• Creators:
  Rahman, Farhana ; Hossain, Mustaque
• Corporate Creators:
  Kansas State University. Transportation Center
• Subject/TRT Terms:
  Aggregates Air Voids Asphalt Concrete Pavements Binder Content Mix Design Moisture Damage Pavement Cracking Pavement Performance Rutting Superpave Thermal Stresses Waste Products

  More +
• Publication/ Report Number:
  KS-14-1
• Resource Type:
  Tech Report
• Geographical Coverage:
  Kansas
• Corporate Publisher:
  Kansas. Dept. of Transportation. Bureau of Materials & Research
• Abstract:
  The Hamburg Wheel Tracking Device (HWTD) test (TEX-242-F) and the Kansas Test Method KT-56 (KT-56), or
  
  modified Lottman test, have been used in Kansas for the last 10 years or so to predict rutting and moisture damage potential of
  
  Superpave mixes, especially mixes containing Reclaimed Asphalt Pavement (RAP). Thermal Stress Restrained Specimen Test
  
  (TSRST) was performed on selected mixes following AASHTO TP 10. All specimens tested were prepared with the Superpave
  
  gyratory compacter.
  
  Results showed that the number of wheel passes and rut depth from the HWTD test are significantly different for
  
  Superpave mixes with various RAP content. Recycled Superpave mixtures with crushed gravel aggregates and sand significantly
  
  improve overall rutting performance compared to crushed stone or crushed stone and gravel combinations in the mix. Aggregate
  
  type also influences rutting performance of virgin Superpave mixtures. Rutting performance of Superpave mixes with or without
  
  RAP is significantly affected by the binder source.
  
  Statistical analysis proved that the total number of wheel passes, creep slope, and stripping slope of Superpave mixes with
  
  RAP in HWTD tests are significantly affected by RAP content, binder grade, and asphalt sources at 90% confidence interval. RAP
  
  percentage in the mix, aggregate type, and interaction between RAP content and aggregate type also affect the pure stripping
  
  failure phase (stripping slope) and total wheel passes at the stripping inflection point. Analysis of variance (ANOVA) on Superpave
  
  mixtures with RAP showed the number of wheel passes at stripping inflection point and stripping slope are significantly affected
  
  by mix type and binder source. Rutting performance is highly influenced by voids in mineral aggregate (VMA) and RAP asphalt
  
  content. Superpave mixtures with higher RAP content also tend to fracture at higher temperatures in the Thermal Stress Restrained
  
  Specimen Test, indicating that these mixtures are more vulnerable to low-temperature cracking. Thus, low-temperature cracking
  
  potential of high RAP mixture must be evaluated during the mixture design process.
  
  
• Format:
  PDF
• Funding:
  C1886
• Collection(s):
  University Transportation Centers US Transportation Collection
• Main Document Checksum:
  urn:sha256:ede0c9fef45e17418cac61a70f211827e71281462c6c301874b28d6ee0ed5c44
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/27034/dot_27034_DS1.pdf
• File Type:
  [PDF - 1.83 MB ]