Performance Evaluation of Warm Recycled Surface Mixtures with Steel Slag

Development of sustainable asphalt mixtures for implementation during the life cycle stages of road pavements is of supreme importance for minimizing the environmental burdens. To this aim, recycling and reuse techniques offer significant benefits in terms of resource conservation and emission reduction. Also, reduction in production temperature of asphalt mixtures by means of warm mix asphalt (WMA) technology results in reduced emissions, fuel usage and binder oxidation, and hence may boost further the environmental but also economic benefits. This study investigates the performance of surface course mixtures designed with various contents of reclaimed asphalt (RA) and EAF steel slag aggregates, and produced at reduced temperatures by using organic additives. Performance evaluation of warm recycled surface mixtures focused on stiffness and durability. The test results are discussed to address whether the concurrent use of WMA and recycled/solid waste materials is feasible in developing asphalt mixtures with high level of performance.