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 language | English |
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Article number | 04014181 |
Journal | Journal of Materials in Civil Engineering |
Volume | 27 |
Issue number | 6 |
DOIs | |
State | Published - Jun 1 2015 |
Keywords
- Asphalt mixes
- Asphalt pavements
- Laboratory tests
- Stiffness