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- Title
Artificially prepared Reclaimed Asphalt Pavement (RAP)—an experimental investigation on re-recycling.
- Authors
Wang, Di; Cannone Falchetto, Augusto; Moon, Ki Hoon; Riccardi, Chiara; Pei, Jianzhong; Wen, Yong
- Abstract
In this paper, the possibility of using different amounts of re-recycled (repeated recycled) Reclaimed Asphalt Pavement (RAP) in the asphalt mixture was experimentally investigated. First, a single virgin mixture was prepared and artificially aged to simulate the first generation of RAP to be used for designing the first generation of recycled mixtures. Next, the recycled mixtures were further aged to obtain a second generation of RAP to be mixed for preparing the second generation of recycled mixtures with and without the contribution of a rejuvenator. The fatigue behavior and low-temperature properties of all asphalt mixtures were experimentally investigated based on the cylindrical indirect tensile test (CIDT), Bending Beam Rheometer (BBR) mixture creep stiffness tests, and Semi-Circular Bending (SCB) fracture tests, respectively. Results indicate that re-recycled materials designed with and without rejuvenator show inferior fatigue behavior with respect to the first generation of recycled mixtures while exhibiting better performance than the virgin material. Meanwhile, poorer low-temperature creep properties were observed for the mixture prepared with recycled and re-recycled RAP. Fracture properties comparable with those of the virgin material were obtained only for re-recycled mixtures designed with rejuvenator. The present experimental work provides evidence on the possibility of using re-recycled RAP up to 40% when rejuvenators are included in the mix design.
- Subjects
ASPHALT pavements; TENSILE tests; ASPHALT; ASPHALT modifiers
- Publication
Environmental Science & Pollution Research, 2019, Vol 26, Issue 35, p35620
- ISSN
0944-1344
- Publication type
Article
- DOI
10.1007/s11356-019-05970-w