Structural Pavement Design Advancement in Alabama Phase 1: Software Development and Design Input Assessment

Details

• Creators:
  Bowers, Benjamin F. ; Timm, David H. ; Biessan, Don Guy
• Corporate Creators:
  Auburn University. Highway Research Center
• Corporate Contributors:
  Alabama. Department of Transportation
• Subject/TRT Terms:
  AASHTO 1993 Asphalt Pavements Calibration Data Files Laboratory Tests Materials Mechanistic-empirical Pavement Design Methodology Pavement Design Pavement Materials Pavement Performance Software

  More +
• Publication/ Report Number:
  930-994
• Resource Type:
  Tech Report
• Geographical Coverage:
  Alabama ; United States
• Corporate Publisher:
  Auburn University. Highway Research Center
• Abstract:
  Like many agencies, the Alabama Department of Transportation (ALDOT) uses the AASHTO 1993 Design Guide as the basis for pavement thickness design in Alabama. The design software, DARWin, is no longer supported by AASHTO, causing a need for an Alabama-specific version of the software that can be used by ALDOT and its consultants in modern Windows-based operating systems. Further, there is a need to (1) gather and assess datasets that will support the assessment of current AASHTO 1993 design inputs, (2) compare computed design inputs from those datasets to current default values used by ALDOT, and (3) extract from the datasets information that could be used for future implementation of the AASHTOWare© Pavement-ME pavement design software. The outcomes of this project include the development of the Alabama Design and Analysis of Pavement Thickness (ADAPT) software which can be deployed throughout ALDOT and amongst its consultants to design pavements in accordance with the AASHTO 1993 methodology. A sensitivity analysis of design comparing ADAPT to DARWin is provided. A Microsoft Access database of historical data for subgrade, aggregate base, stabilized base, asphalt concrete, and portland cement concrete was also created. This database was then used to statistically compare the current ALDOT default structural inputs with measured values. It is recommended that ALDOT not change its current structural design inputs for aggregate base and reassess the way it currently evaluates Full Depth Reclamation with cement and soil-cement mixtures. Subgrade moduli for 11 AASHTO classified materials are also provided.
• Format:
  PDF
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:af015c5d70bddc74f2ef14bbd154c4431acf45a560463d5e4491549524e6e6ddb8499db77c31f258b13ff52f021a36e8be6b7435abb2ac8c04708ff0bb6fa285
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/77517/dot_77517_DS1.pdf
• File Type:
  [PDF - 2.97 MB ]