Evaluation of different procedures and models for the construction of dynamic modulus master curves of asphalt mixtures

The dynamic modulus IE*I is the primary input material property of asphalt mixtures for the asphalt pavement design procedures based on mechanistic principles. Among other factors, this dynamic modulus is a function of temperature and loading frequency. In order to model the effects of these factors, the dynamic modulus of the asphalt mixture is described using a master curve constructed at a given reference temperature on the basis of the principle of frequency-temperature superposition for thermo-rheologically simple materials. The amount of shifting at each temperature is given by a shift factor that describes the temperature dependency of the material. Different methods and mathematical functions have been proposed to model these shift factors and the resulting dynamic modulus master curve. The objective of this paper is to evaluate these various methods and mathematical equations that can be satisfactorily used for modelling the dynamic modulus IE*I master curves, as a function of frequency at a reference temperature for six different asphalt mixtures used in Argentina. The methodology for evaluating these models was based on using the same laboratory test data and comparing the resulting curves through correlation analysis. The experimental results and a description of the considered procedures and models used to develop the master curves are presented followed by a comparative analysis and a synthesis of the obtained findings.

Language

  • English

Media Info

  • Pagination: pp 647-656
  • Monograph Title: Bearing capacity of roads, railways and airfields: proceedings of the ninth International Conference on the Bearing Capacity of Roads, Railways and Airfields: Trondheim, Norway 25-27 June 2013. Vol 1-2

Subject/Index Terms

Filing Info

  • Accession Number: 01596562
  • Record Type: Publication
  • Source Agency: Swedish National Road and Transport Research Institute (VTI)
  • ISBN: 9788232102853
  • Files: ITRD, VTI
  • Created Date: Apr 21 2016 12:30PM