Author(s)

Yan Zhang ¹

Affiliation(s)

¹ Dalian University of Engineering, Dalian, 116600, China

Corresponding Author

Yan Zhang

ABSTRACT

To achieve efficient resource utilization of reclaimed asphalt pavement (RAP), this study aims at a 60% RAP content and employs a self-developed composite rejuvenator for waste oil to investigate the mix proportion design and road performance of AC-13 hot-mix recycled asphalt mixture. The optimal rejuvenator dosage was determined as 12% by weight of recovered old asphalt based on asphalt aging recovery tests. Using the Marshall design method, the optimal new asphalt content was identified as 1.87%, corresponding to an asphalt-to-aggregate ratio of 5.11%. Comprehensive evaluations were conducted on high-temperature stability, moisture stability, low-temperature cracking resistance, and Marshall mechanical properties. Results indicate that the dynamic stability reaches 4,866 cycles/mm, the residual Marshall stability after immersion is 99.2%, the freeze-thaw splitting strength ratio is 107.1%, the low-temperature bending strain at -10°C is 2,131.5 με, and the Marshall stability is 15.58 kN. All indicators meet specification requirements, demonstrating excellent high-temperature performance, outstanding moisture resistance, adequate low-temperature resistance, and sufficient mechanical strength. This research confirms the technical feasibility of recycling asphalt mixtures with 60% RAP content, providing reliable support for large-scale RAP utilization and green, low-carbon road development.

KEYWORDS

Central Plant Hot Recycling; High-RAP Content; Rejuvenator; Mix Proportion Design; Road Performance; Asphalt Mixture

CITE THIS PAPER

Yan Zhang. Design of Mix Proportions and Evaluation of Road Performance for High-RAP Hot-Mix Asphalt Recycled with Central Plant. Journal of Civil Engineering and Urban Planning (2026). Vol. 8, No.2, 131-138. DOI: http://dx.doi.org/10.23977/jceup.2026.080214.

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