Design Comparison Between 1993 AASHTO and MEPDG Using Level 1 Input for Continuously Reinforced Concrete Pavement: A Case Study in Virginia

Traditional pavement design using 1993 AASHTO Guide for Design of Pavement Structures (93 AASHTO) is based on empirical equations developed using 1950s AASHTO road test data. The 93 AASHTO guide have served many highway agencies well over the years, but the road test data has limitations in its application to today’s truck traffic or to sites with varying climate and subgrade materials. On the other hand, Mechanistic-Empirical Pavement Design Guide (MEPDG) software uses numerical models to analyze traffic, climate, subgrade and laboratory measurements of material properties to predict the performance of various pavement designs over their entire service life. The interactions between geometrics, material properties, traffic, and environmental conditions in the MEPDG approach are more pronounced than are those in the 93 AASHTO guide. The MEPDG possess three hierarchical input levels: level 1 from site specific and actual tests, resulting in higher accuracy, level 2 from less than optimal testing or by correlations, and level 3 from the agency database, user selected default values. The objective of this paper is to compare the design and performance between the empirical 1993 AASHTO and the MEPDG methodology using level 1 input data from a recently constructed Continuously Reinforced Concrete Pavement (CRCP) project at I-64 Battlefield Boulevard, Chesapeake, Virginia as case study. The MEPDG provides a number of new approaches for characterizing materials to be used in 21st Century pavement design. In this paper, particular emphasis is devoted to the efforts used for level 1 material characterization for the analysis.

Language

  • English

Media Info

  • Media Type: DVD
  • Features: Figures; Illustrations; Photos; References; Tables;
  • Pagination: 20p
  • Monograph Title: TRB 89th Annual Meeting Compendium of Papers DVD

Subject/Index Terms

Filing Info

  • Accession Number: 01152199
  • Record Type: Publication
  • Report/Paper Numbers: 10-1708
  • Files: TRIS, TRB
  • Created Date: Jan 25 2010 10:46AM