ABSTRACT
The use of recycled aggregates into Hot Mix Asphalts (HMAs) is a key issue for addressing the environmental sustainability in the construction of road pavements. In this context, the paper reports the results of a laboratory investigation on the use of Stabilized Bottom Ashes (SBAs), sieved in the range of sands (0.063 to 6 mm). The investigation was devoted to study the effects of such SBAs on the mechanical performance of the corresponding HMA; four SBAs contents (0, 30, 60 and 100%) and two bitumen percentages (4.3% and 5.8%) were considered. The laboratory tests included stiffness measures for calculating the HMAs’ Master Curves, fatigue life and rutting potential. The results suggest that SBAs reduce the mixtures’ mechanical performance. Nevertheless, in some cases, it is possible to balance the performance expectations of a HMA and environmental benefits deriving by the use of recycled materials.
