Towards an integrated pavement design approach : using HWTD to support the MEPDG

Details

• Creators:
  Grebenschikov, Sergey ; Prozzi, Jorge Alberto
• Corporate Creators:
  Texas Transportation Institute ; Texas ; University of Texas at Austin. Center for Transportation Research
• Subject/TRT Terms:
  Asphalt Mix Production Hamburg Wheel Tracking Device (HWTD) Hot-Mix Asphalt Hot Mix Asphalt Mechanistic-Empirical Pavement Design Guide (MEPDG) Pavement Design Pavement Performance Rutting Tables (Data)
• Publication/ Report Number:
  SWUTC/10/167274-1 ; Report 167274-1
• Resource Type:
  Research Paper
• Geographical Coverage:
  Texas
• Corporate Publisher:
  Southwest Region University Transportation Center (U.S.)
• Abstract:
  Variability of hot-mix asphalt (HMA) production can have drastic effects on pavement performance. A poor
  
  gradation or an inappropriate amount of asphalt binder could lead to early distresses and shorter pavement life. Other
  
  factors, such as the air void content in the asphalt layer, the type of aggregate gradation used in the mix or
  
  volumetrics, in general, can also have significant effects on performance.
  
  This research study focuses on analyzing two techniques for observing the variability of mix production and its
  
  effects on pavement performance. First, this study focuses on using the Mechanistic-Empirical Pavement Design
  
  Guide (MEPDG) to analyze and predict the effect of the variability of HMA production on rutting in the asphalt
  
  layer. Then, this study makes an attempt to compare the results produced by the MEPDG with the results produced
  
  by the Hamburg Wheel Tracking Device (HWTD). In order to effectively establish correlations between the two
  
  techniques, an experiment was conducted during this research. This experiment focused on using volumetric data
  
  from a previous research project. The data from this project was used to model asphalt mixes and pavement
  
  structures in the MEPDG and the performance results were then compared to actual data obtained in the laboratory
  
  from the Hamburg Wheel Tracking Device (HWTD).
  
  The variability of mix production was captured by analyzing three types of limestone mixes: a coarse densegraded
  
  hot-mix asphalt (Type C, according to TxDOT specification), a fine dense-graded hot-mix asphalt (Type D),
  
  and a medium graded stone matrix asphalt (SMA-D). The master gradation band for each mixture was split into
  
  three categories: fine, target (actual job mix formula), and coarse. Each mixture was tested at a variable range of
  
  binder contents which were obtained using the TxDOT Mix Design Method (TxDOT, 2009). The variability of these
  
  mixes and their resistance to rutting as predicted by the MEPDG and measured by the HWTD is discussed in this
  
  report.
  
  
• Format:
  PDF
• Funding:
  10727
• Collection(s):
  University Transportation Centers US Transportation Collection
• Main Document Checksum:
  urn:sha256:e8613291353d2c6f0787ccc003ec80ef40640240697441d58209a0ffbca6fd05
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/18624/dot_18624_DS1.pdf
• File Type:
  [PDF - 966.16 KB ]