Over the last decades, Reclaimed Asphalt Pavement (RAP) has become one of the most recycled materials. Currently, RAP is mainly used for unbound layers, without exploiting the replacement of a portion of the more expensive virgin binder. Moreover, the increasing quantity of RAP which includes aged modified binders complicates material analysis. This paper presents a laboratory mechanical investigation on hot recycled mixtures prepared with RAP including aged Styrene-Butadiene-Styrene (SBS) modified binder. A reference mixture with 25% RAP and four mixtures with 40% RAP were investigated. Two total binder contents and two virgin SBS modified binders were used to produce mixtures with 40% RAP, which were designed using the Bailey method. Compactibility, stiffness properties, cracking and rutting resistance were evaluated on laboratory compacted specimens. Results suggest that amounts of RAP up to 40% are suitable for the production of new bituminous materials, when a specific and detailed mix design is performed.
Performance evaluation of hot recycled mixtures containing sbs modified binder / Stimilli, Arianna; Ferrotti, Gilda; Radicioni, Daniele; Canestrari, Francesco. - ELETTRONICO. - (2015), pp. 607-616. (Intervento presentato al convegno 6th International Conference on Bituminous Mixtures and Pavements tenutosi a Thessaloniki; Greece nel 10/06/2015 - 12/06/2015).
Performance evaluation of hot recycled mixtures containing sbs modified binder
FERROTTI, Gilda;CANESTRARI, FRANCESCO
2015-01-01
Abstract
Over the last decades, Reclaimed Asphalt Pavement (RAP) has become one of the most recycled materials. Currently, RAP is mainly used for unbound layers, without exploiting the replacement of a portion of the more expensive virgin binder. Moreover, the increasing quantity of RAP which includes aged modified binders complicates material analysis. This paper presents a laboratory mechanical investigation on hot recycled mixtures prepared with RAP including aged Styrene-Butadiene-Styrene (SBS) modified binder. A reference mixture with 25% RAP and four mixtures with 40% RAP were investigated. Two total binder contents and two virgin SBS modified binders were used to produce mixtures with 40% RAP, which were designed using the Bailey method. Compactibility, stiffness properties, cracking and rutting resistance were evaluated on laboratory compacted specimens. Results suggest that amounts of RAP up to 40% are suitable for the production of new bituminous materials, when a specific and detailed mix design is performed.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.