Civil Engineering & Construction: Faculty Publications

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

Document Type

Article

Publication Date

8-12-2014

Publication Title

Journal of Materials in Civil Engineering

DOI

10.1061/(ASCE)MT.1943-5533.0001140

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.

Comments

Georgia Southern University faculty member, Myung Jeong co-authored "Stochastic estimation of the in-place dynamic modulus for asphalt concrete pavements."

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