Dynamic modulus of asphalt mixtures: Evaluation of effects on pavement performance prediction
Document Type
Article
Publication Date
1-1-2015
Abstract
Mix properties that deviate appreciably from the design properties during the production and construction of asphalt mixtures can lead to premature pavement distress or even failure. The objective of this study was to quantify the differences in the dynamic modulus of specimens prepared during design, production, and construction of dense-graded asphalt pavements and their effects on pavement performance prediction. For the achievement of this objective, Superpave® mixtures were collected from Iowa, Florida, Virginia, Michigan, South Dakota, Louisiana, Minnesota, and Wisconsin during design [laboratory-mixed and laboratory-compacted (LL)], production [plant-produced and laboratory-compacted (PL)], and construction [plant-produced and field-compacted (PF) specimens]. The nominal maximum aggregate size was kept constant at 12.5 mm. An indirect tension dynamic complex modulus (IDT zE∗z) was measured for the three specimen types (i.e., LL, PL, and PF). Results showed that laboratory-compacted and field-compacted specimens exhibited large and significant differences. This finding was attributed to differences in the compaction effort and procedure between the field and the laboratory. Results of the AASHTOWare Pavement ME Design showed that the use of dynamic moduli obtained from different specimen types would result in significant differences in pavement performance prediction. This research was part of NCHRP Project 9-48, Field Versus Laboratory Volumetrics and Mechanical Properties.
Publication Source (Journal or Book title)
Transportation Research Record
First Page
67
Last Page
77
Recommended Citation
Cooper, S., Mohammad, L., Elseifi, M., & Raghavendra, A. (2015). Dynamic modulus of asphalt mixtures: Evaluation of effects on pavement performance prediction. Transportation Research Record, 2507, 67-77. https://doi.org/10.3141/2507-08