Stochastic estimation of the in-place dynamic modulus for asphalt concrete pavements

Myung Goo Jeong, Leslie Myers McCarthy, David J. Mensching

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

The dynamic modulus of asphalt concrete mixtures is a key property in assessing asphalt pavement performance based on its role in the mechanistic-empirical design method. The dynamic modulus is also considered to be used as one of the major characteristics in performance-related specifications for quality assurance. However, no feasible method to estimate the mean and variance of the in-place dynamic modulus for the as-built asphalt pavement has been suggested. This paper presents a methodology of stochastically evaluating the in-place dynamic modulus of the as-built asphalt pavement using a relationship of in-place air voids and a set of single dynamic modulus values measured in the laboratory. The methodology was validated with asphalt mix collected from a construction site. The comparison plot between the estimated in-place dynamic modulus and as-designed asphalt mix demonstrated a simple way to evaluate the as-built mix quality. This methodology provides several practical advantages to determine the quality of as-built mix compared with that of as-designed mix in terms of the dynamic modulus. In addition, the methodology envisions the possibility of incorporating the dynamic modulus into performance-related specifications.

Original languageEnglish
Article number04014181
JournalJournal of Materials in Civil Engineering
Volume27
Issue number6
DOIs
StatePublished - Jun 1 2015

Keywords

  • Asphalt mixes
  • Asphalt pavements
  • Laboratory tests
  • Stiffness

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