Comparison of aggregate gradation and mixture physical properties to performance tests of coarse-graded superpave mixtures in Louisiana
Document Type
Conference Proceeding
Publication Date
12-1-2004
Abstract
A comparison of laboratory performance tests of coarse-graded Superpave HMA mixtures in Louisiana with physical properties of mixtures including volumetrics, aggregate gradation analysis, and field performance was presented. Eight Superpave HMA mixtures were evaluated. Six of the eight mixtures were designed for high-volume traffic (> 30 million ESAL), while the other two mixtures were designed for low-volume traffic (< 3 million ESAL). Theses mixtures includes two aggregate types: limestone and sandstone, and two binder types: PG 70-22M and PG 76-22M. The results of the power law regression analyses showed that high volume mixtures are coarser than low volume ones. High-volume mixtures had higher indirect tensile (IT) strengths when compared to those of low-volume mixtures. High-volume mixtures exhibited lower creep slopes than low-volume mixtures. Gradation parameters were quite sensitive to the IT creep slope. Parabolic correlations were observed between the IT and axial creep tests and gradation analysis slopes and intercept, indicating that gradation parameters are sensitive to the creep properties of asphalt mixtures. This is an abstract of a paper presented at the Association of Asphalt Paving Technologists 2004 Technology Sessions (Baton Rouge, LA 3/10-18/2004).
Publication Source (Journal or Book title)
Asphalt Paving Technology, AAPT
First Page
261
Last Page
285
Recommended Citation
Mohammad, L., Wu, Z., Raghavendra, A., & Abadie, C. (2004). Comparison of aggregate gradation and mixture physical properties to performance tests of coarse-graded superpave mixtures in Louisiana. Asphalt Paving Technology, AAPT, 261-285. Retrieved from https://repository.lsu.edu/civil_engineering_pubs/943