Environmental assessment of warm mix asphalt incorporating steel slag and high reclaimed asphalt for wearing courses: a case study

This study quantifies the potential environmental benefits associated with incorporation of industrial by-products and recycled materials combined warm mix asphalt (WMA) additives in wearing course mixtures for pavement construction. An electric arc furnace (EAF) steel slag-based three incorporating slag fractionated reclaimed (RA) varying contents (i.e. 25, 40, 50%) were analyzed comparatively to reference hot (HMA) using ‘cradle-to-gate’ approach. The results this indicated that mixture 50% RA is most environmentally friendly alternative. greatest result from use asphalt, which attributed lesser demands raw material extraction, bitumen production, resource supply. On contrary, contribution lowering mixtures’ production temperature by 30°C minimal.