Determining Asphalt Mixture Properties Using Imaging Techniques

Authors

Mohammad Ali Notani, Purdue UniversityFollow
Behnam Jahangiri, Purdue UniversityFollow
Reyhaneh Rahbar-Rastegar, Purdue UniversityFollow
John E. Haddock, Purdue UniversityFollow

Abstract

This study introduces imaging technology to determine the bulk specific gravity (G_mb) of compacted asphalt mixture specimens. Using an advanced three-dimensional scanner, a fast, accurate technique for determining compacted asphalt mixture specimen G_mb was developed. The feasibility of this technique was evaluated by testing a collection of asphalt mixtures, including dense-graded and stone mastic asphalt mixtures. The results were compared with those obtained using the currently-specified G_mb measurement methods of AASHTO T166 and CoreLok. The proposed scanning technique was also used for both laboratory-prepared and field-cored specimens to determine its reliability and reproducibility. The study results suggest the proposed imaging technique is effective in decreasing G_mb measurement variation as well as in improving the accuracy and reproducibility. Additionally, the results indicate the proposed technique can be applied to any asphalt specimen, regardless of mixture type, aggregate sizes, or fabrication technique.

Keywords

imaging technique, bulk specific gravity, AASHTO-T166, CoreLok, scanner, asphalt mixture

Report Number

FHWA/IN/JTRP-2023/12

SPR Number

4415

Sponsoring Organization

Indiana Department of Transportation

Performing Organization

Joint Transportation Research Program

Publisher Place

West Lafayette, IN

Date of Version

2023

DOI

10.5703/1288284317635

Recommended Citation

Notani, M. A., Jahangiri, B., Rastegar, R. R., & Haddock, J. E. (2023). Determining asphalt mixture properties using imaging techniques (Joint Transportation Research Program Publication No. FHWA/IN/JTRP-2023/12). West Lafayette, IN: Purdue University. https://doi.org/10.5703/1288284317635