Determination of the Appropriate Representative Elastic Modulus for Asphalt Concrete

The National Cooperative Highway Research Program (NCHRP) 1-37A mechanistic-empirical pavement design guide (MEPDG) utilises the dynamic modulus of asphalt concrete in a multilayered elastic analysis to determine the primary responses in asphalt pavements. The dynamic modulus depends on temperature and loading frequency. In the MEPDG, the pulse time is used to determine the loading frequency. This methodology has been under scrutiny due to the large modulus it estimates. This paper evaluates several approximation methods, including the current MEPDG analysis, for the calculation of stresses and strains in linear viscoelastic materials by comparing analysis results with the solutions from the exact linear viscoelastic analysis. Sources of the errors that result from various approximation methods are discussed. Also, an alternative method to that of the MEPDG is proposed for determining the appropriate representative elastic modulus of asphalt concrete.

• Record URL:
  • http://www.informaworld.com/10.1080/10298430701827668
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/44544515
• Supplemental Notes:
  • Abstract reprinted with permission from Taylor and Francis
• Authors:
  • Underwood, Benjamin Shane
  • Kim, Youngsoo Richard
• Publication Date: 2009

Language

• English

Media Info

• Media Type: Print
• Features: Figures; Illustrations; References; Tables;
• Pagination: pp 77-86
• Serial:
  • International Journal of Pavement Engineering
  • Volume: 10
  • Issue Number: 2
  • Publisher: Taylor & Francis
  • ISSN: 1029-8436
  • Serial URL: http://www.tandf.co.uk/journals/titles/10298436.html

Subject/Index Terms

• TRT Terms: Asphalt concrete; Asphalt mixtures; Asphalt pavements; Dynamic modulus of elasticity; Materials at high or low temperatures; Mechanical loads; Modulus of elasticity; Stresses; Viscoelasticity
• Identifier Terms: Mechanistic-Empirical Pavement Design Guide; National Cooperative Highway Research Program
• Subject Areas: Highways; Materials; Pavements; I22: Design of Pavements, Railways and Guideways; I31: Bituminous Binders and Materials; I32: Concrete;

Filing Info

• Accession Number: 01138994
• Record Type: Publication
• Files: TRIS
• Created Date: Aug 31 2009 9:24AM