Assessing RAP Multi-Recycling Capacity by the Characterization of Recovered Bitumen Using DSR

Vítor Antunes (), Fernando Moreno, Maria Rubio-Gámez, Ana Cristina Freire and José Neves
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Vítor Antunes: CERIS, Faculty of Engineering, Lusófona University, Campo Grande 376, 1749-024 Lisbon, Portugal
Fernando Moreno: Laboratory of Construction Engineering (LabIC.UGR), School of Civil Engineering (ETSICCP), University of Granada, Dr. Severo Ochoa s/n, 18071 Granada, Spain
Maria Rubio-Gámez: Laboratory of Construction Engineering (LabIC.UGR), School of Civil Engineering (ETSICCP), University of Granada, Dr. Severo Ochoa s/n, 18071 Granada, Spain
Ana Cristina Freire: LNEC—Laboratório Nacional de Engenharia Civil, Av. do Brasil 101, 1700-066 Lisbon, Portugal
José Neves: CERIS, Instituto Superior Técnico da Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisbon, Portugal

Sustainability, 2022, vol. 14, issue 16, 1-16

Abstract: This paper addresses the changes in bitumen properties during multi-recycling cycles, both before and after ageing. The rheology of recovered bitumen was characterized using the dynamic shear rheometer. The softening point and penetration value were also determined. The analysis showed that the bitumen’s properties could be recovered even after more than one recycling cycle. The bitumen recovered from the second recycling cycle presented an average reduction of 45% in terms of complex modulus when compared with the first recycling cycle. The bitumen from the RAP mixtures presented a similar susceptibility to ageing. The analysis clearly showed that RAP has the potential to be multi-recycled.

Keywords: RAP; multi-recycling; DSR; rejuvenator; ageing; sustainability (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
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Persistent link: https://EconPapers.repec.org/RePEc:gam:jsusta:v:14:y:2022:i:16:p:10171-:d:889602

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