Use of stabilized bottom ash for bound layers of road pavements

This paper reports about the lab scale results obtained by using stabilized bottom ash (SBA) from an Italian municipal solid waste incinerator as aggregates in cement-bound mixes and asphalt concretes for road pavements.The investigation focused on SBA content. From the road construction point of view, performance related to compaction, volumetric and mechanical properties were assessed. The environmental aspects were investigated performing leaching tests.The results suggested that SBA satisfied the environmental Italian law for reuse of non-hazardous waste but affected significantly the stress-strain behavior of the final products. Therefore a maximum percentage of 10% was suggested.

► Stabilized Bottom Ash (SBA) was used as aggregates for pavements of high traffic roads. ► Mechanical and environmental performances were investigated at different SBA content. ► SBA content affected significantly the stress-strain behavior of the final products. ► Based on results, SBA maximum percentage of 10% by weight was suggested. ► The aggregates fulfilled the Italian law for reuse of non-hazardous waste.