ORIGINAL RESEARCH article
Front. Mater.
Sec. Structural Materials
Volume 12 - 2025 | doi: 10.3389/fmats.2025.1588683
Research on Performance Evaluation of Multiple Recycling Asphalt and Multiple Recycling Asphalt Mixtures
Provisionally accepted
- 1Hubei Traffic Investment Beijing Hong Kong Macao Expressway Reconstruction and Expansion Project Management Co., Ltd, Wuhan, China
- 2Research Institute of Highway Ministry of Transport, Beijing, China
- 3Beijing Xinqiao Technology Development Co., Ltd., Beijing, China
- 4University of Georgia, Athens, Georgia, United States
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Whether reclaimed asphalt pavement (RAP) can be reused multiple cycles has become a focal issue in the industry. This paper investigates the macroscopic physical property changes and microscopic four-component alteration mechanisms of multiple recycling asphalt, simulates the multiple recycling processes of asphalt mixtures through laboratory tests, determines the mix proportions of multiple recycling asphalt mixtures through Marshall test, and evaluates the pavement performance of the mixtures using high-temperature wheel tracking test, semi-circular bending test, and freeze-thaw splitting test. The results indicate that after multiple recycling, multiple recycling asphalt exhibits poorer rheological property; high-temperature performance of multiple recycling asphalt mixture is improved, and low-temperature performance of multiple recycling asphalt mixture is significantly degraded. The solubilization of rejuvenator in old asphalt intensifies with increasing rejuvenator dosage but decreases exponentially with the increasing number of recycling cycles. The high-temperature stability of recycled asphalt mixtures gradually increases with the number of recycling cycles, while water stability shows low sensitivity to the number of recycling cycles. After the third recycling, the Marshall volume indicators of the recycled asphalt mixtures can meet the regulatory requirement. After the second recycling, the lowtemperature anti-cracking performance of the recycled mixtures deteriorates rapidly. In summary, when asphalt mixtures undergo multiple recycling, special attention should be paid to the restoration of their low-temperature property.
Keywords: recycled asphalt, Microscopic Performance, Multiple recycling, Reclaimed asphalt pavement mixture, Low-temperature performance, Water stability
Received: 06 Mar 2025; Accepted: 22 Apr 2025.
Copyright: © 2025 Yu, Wang, Wang, Cai, Li and Wang. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence:
Sudi Wang, Research Institute of Highway Ministry of Transport, Beijing, China
Jie Wang, Research Institute of Highway Ministry of Transport, Beijing, China
Disclaimer: All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.