Abstract
In order to explore the potentials of a foam-based warm-mix asphalt(WMA) technology for the production of EME2 mixtures, an extenstive laboratory study was carried out. In this study EME2 mixtures incoporating 0% and 30% reclaimed asphalt (RA) were produced at 120°C using WMA technology. As control mixtures, hot-mix variants of these mixtures were also produced at 180°C. The performances of these mixtures were determined using various methods. Among others, the water sensitivity, stiffness, fatigue and resistance to permanent deformation characteristics of the mixtures were investigated. Rheological tests were also performed on virgin and recovered binders. Results showed that using the WMA method a significant reduction in production temperature can be achieved. Despite differences in production temperatures, the WMA mixtures showed equivalent performance to their hot-mix variants. Rheological results indicate the additional benefits of WMA in preserving the bitumen by limiting oxidation during production and compaction process.
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