Laboratory investigation on the use of recycled materials in bituminous mixtures for dense-graded wearing course

• Concurrent use of RA, Stabilized Bottom Ashes and Waste Engine Oil is investigated. Compaction Energy Index was successfully used to assess compaction characteristics. High contents RA were for bituminous wearing courses. can be as a fluxing agent, reducing aged binder viscosity. artificial aggregates. Reduce, recycle reuse materials are the three crucial procedures that affect economy current century, which mandatory in preserving protecting planet next generations. In this field, construction road pavements plays fundamental role since huge amount involved, particularly mixtures. This reason why efforts scientific community were, still are, addressed investigate alternative pavement solutions recycled reused materials, mostly come from end-of-life removal, included with goal landfill operations. Moreover, lot these directed producing mixtures structural layers, not course. Therefore, order step ahead technical approaches, research focused on study effects concurrent reclaimed asphalt (RA), stabilized bottom ashes (SBA) urban waste incinerators, engine oil (WEO) substitution commercial rejuvenators. benefits deriving polymer additives assessed. regard, set compaction, volumetric mechanical tests performed at laboratory scale, demonstrating it possible high amounts (20 % 60 %) courses, also combined SBAs WEO. More detail, obtained results demonstrate that: both generally increase mixtures’ stiffness (as confirmed by Master Curves Indirect Tensile Strength results); SBA aggregates; WEO able act agent obtain mixture’s viscosity reduction.