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

This document is currently not available here.

Share

COinS