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:
  • Superpave
  • Asphalt concrete pavements
  • Rutting
  • Moisture damage
  • Waste products
  • Pavement performance
  • Mix design
  • Pavement cracking
  • Air voids
  • Aggregates
  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.
  More +
• Format:
  PDF
• Funding:
  C1886
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/27034/dot_27034_DS1.pdf
• File Type:
  [PDF - 1.83 MB]
• Collection(s):
  University Transportation Centers ; US Transportation Collection
• Main Document Checksum:
  urn:sha256:ede0c9fef45e17418cac61a70f211827e71281462c6c301874b28d6ee0ed5c44