Binder and Mixture Fatigue Performance of Plant-Produced Road Surface Course Asphalt Mixtures with High Contents of Reclaimed Asphalt

Ayad Subhy, Gustavo Menegusso Pires, Ana Jiménez del Barco Carrión, Davide Lo Presti and Gordon Airey
Additional contact information
Ayad Subhy: Pavement Design and Asset Management, Civil and Infrastructure, AECOM, Nottingham, NG9 6RZ, UK
Gustavo Menegusso Pires: Nottingham Transportation Engineering Centre, University of Nottingham, Nottingham, NG7 2RD, UK
Ana Jiménez del Barco Carrión: Nottingham Transportation Engineering Centre, University of Nottingham, Nottingham, NG7 2RD, UK
Davide Lo Presti: Nottingham Transportation Engineering Centre, University of Nottingham, Nottingham, NG7 2RD, UK
Gordon Airey: Nottingham Transportation Engineering Centre, University of Nottingham, Nottingham, NG7 2RD, UK

Sustainability, 2019, vol. 11, issue 13, 1-14

Abstract: The aged properties of Reclaimed Asphalt (RA) binders are one of the main factors working against their utilisation in high-RA content (>30%) mixes for surface courses. Fatigue cracking is the main distress of surface courses that are manufactured with a high percentage of RA. This investigation presents results of the rheological and fatigue results of different asphalt mixtures and their recovered binders. The binders were recovered from asphalt mixtures that had been manufactured in asphalt plants using different amounts of RA with contents up to 60% with and without rejuvenators. Two different sources of RA were used, representing a moderately aged RA and an extremely aged RA. The Dynamic Shear Rheometer (DSR) was used to assess the fatigue-characteristics of the binders using time sweep tests while the fatigue characteristics of their mixtures were assessed using the Indirect Tensile Fatigue Test (ITFT). The fatigue data was analysed based on the cumulative dissipated energy approach in addition to traditional fatigue analysis. Results have shown that the ageing condition of RA significantly affects the fatigue properties of recovered binders. Binder and asphalt mixture fatigue results showed that RA contents up to 60% can produce comparable fatigue performance compared to lower percentages of RA in road surface course if the aged RA binder is sufficiently rejuvenated.

Keywords: road surface courses; reclaimed asphalt (RA); asphalt binder; fatigue performance; rejuvenators (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2019
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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