Development of SUPERPAVE High-Temperature Performance Grade (PG) Based on Rutting Damage (With Discussion and Closure)

SUPERPAVE asphalt binders are selected using the Performance Grade (PG) methodology introduced by the Strategic Highway Research Program. The PG grading system has two components; low-temperature and high-temperature. The work presented in this paper provides an improved methodology to select the high temperature PG grade for asphalt binders. An enhanced high-temperature transfer function for pavement temperatures was developed through a comprehensive application of the Integrated Climatic Model (ICM) This model was developed using hourly climatic data, providing a more accurate representation of the high-temperature conditions in the pavement. Using the hourly high-temperature calculations, a performance based procedure utilizing current empirical models for Hot Mix Asphalt (HMA) stiffness and rut predictions was developed. This procedure is a damage based comparison of rut development and the impact of the use of different PG graded binders to compare the accumulation of damage. It accounts for extended hot periods in certain climates, which could not be considered in the original selection procedure. Models were developed to extend the damage-based PG concept from the limited number of stations with hourly temperature data to the entire database using daily temperature data. A Degree-Days concept was developed to relate the number of days the pavement temperature is over 10 deg C to the damage-based PG calculation. The performance based nature of the damage concept allows for a mechanistic inclusion of traffic amount, and the traffic speed. Recommendations for grade bumping for traffic and speed were presented. Variability was included to provide protection against the one-time extreme temperature event. An existing software program was modified to include the new algorithm for implementation.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/70700638
• Authors:
  • Mohseni, Alaeddin
  • Carpenter, Samuel
  • D'Angelo, John
• Discussers:
  • McGennis, Robert B
  • Rowe, Geoffrey
  • Monismith, Carl
  • Dunning, Robert
  • Coulter, Melzar
• Conference:
  • 2005 Journal of the Association of Asphalt Paving Technologists: From the Proceedings of the Technical Sessions
  • Location: Long Beach CA, United States
  • Date: 2005-3-7 to 2005-3-9
• Publication Date: 2005

Language

• English

Media Info

• Media Type: Print
• Features: CD-ROM; Figures; Maps; References;
• Pagination: pp 197-254
• Serial:
  • Journal of the Association of Asphalt Paving Technologists
  • Volume: 74
  • Publisher: Association of Asphalt Paving Technologists (AAPT)
  • ISSN: 0270-2932
  • Serial URL: https://www.asphalttechnology.org/site_page.cfm?pk_association_webpage_menu=9169&pk_association_webpage=19109

Subject/Index Terms

• TRT Terms: Algorithms; Bituminous aggregates; Bituminous binders; Computer models; High temperature; Hot mix asphalt; Loss and damage; Low temperature; Methodology; Pavements; Rutting; Stiffness; Superpave; Traffic speed; Variables
• Uncontrolled Terms: Performance grade
• Subject Areas: Design; Highways; Materials; Pavements; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 01020746
• Record Type: Publication
• Files: TRIS
• Created Date: Mar 27 2006 11:07AM