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:
  • Hot mix asphalt
  • Tables (Data)
  • Pavement design
  • Rutting
  • Pavement performance
  • Hot-Mix Asphalt
  • Asphalt Mix Production
  • Mechanistic-Empirical Pavement Design Guide (MEPDG)
  • Hamburg Wheel Tracking Device (HWTD)
• 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.
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• Format:
  PDF
• Funding:
  10727
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/18624/dot_18624_DS1.pdf
• File Type:
  [PDF - 966.16 KB]
• Collection(s):
  University Transportation Centers ; US Transportation Collection
• Main Document Checksum:
  urn:sha256:e8613291353d2c6f0787ccc003ec80ef40640240697441d58209a0ffbca6fd05