Abstract
Permanent deformation and moisture sensitivity are the two main challenges with the performance of asphalt emulsion-stabilized base courses. This study investigates the application of asphaltenes as a waste material derived from Alberta oil-sands bitumen in improving stabilized base course mechanical properties. Hence, 1% to 3% of asphaltenes by total weight of mix is added to a granular aggregate stabilized with asphalt emulsion. The impact of asphaltenes on the tensile strength, moisture susceptibility, and rutting performance of the modified mixtures is investigated. The asphaltenes-modified base courses have higher tensile strength and rutting resistance, while their moisture susceptibility is slightly lower than the control mix.
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