Abstract
Moisture damage can manifest in the hot mix asphalt pavements in forms of stripping and/or softening of asphalt. It results in loss of stability and bearing capacity failure, and rutting of asphalt pavement. One of the common anti-stripping additives, hydrated lime, is considered to improve the properties of asphalt mixture in resisting moisture damage. The lime application process can be introduced to asphalt mixture by either adding dry hydrated lime to wet aggregates or adding lime slurry to dry aggregates. This study aims to evaluate the laboratory performance-based properties of asphalt mixtures using two different lime application processes as well as to compare between hydrated lime-modified and polymer-modified asphalt mixture. Results indicated that the performance of hydrated lime modified asphalt mixture in moisture damage and rutting resistance is related to the lime application processes. Adding hydrated lime to asphalt binder is an effective and economical method to improve performance of asphalt mixture in moisture damage and rutting resistance.
