Effect of laboratory aging on the performance of asphalt mixture containing high RAP content with the rejuvenator-loaded fiber
This study investigates the performance of recycled asphalt mixtures containing 50 % reclaimed asphalt pavement (RAP), focusing on the impact of rejuvenator-loaded fibers under various aging conditions: short-term aging (STA) and long-term aging at four (LTA4) and seven (LTA7) days. The mixtures wer...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-07-01
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| Series: | Case Studies in Construction Materials |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509525000889 |
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| author | Yuxuan Sun Fan Zhang Augusto Cannone Falchetto Di Wang |
| author_facet | Yuxuan Sun Fan Zhang Augusto Cannone Falchetto Di Wang |
| author_sort | Yuxuan Sun |
| collection | DOAJ |
| description | This study investigates the performance of recycled asphalt mixtures containing 50 % reclaimed asphalt pavement (RAP), focusing on the impact of rejuvenator-loaded fibers under various aging conditions: short-term aging (STA) and long-term aging at four (LTA4) and seven (LTA7) days. The mixtures were compared to a standard virgin AB16 asphalt mixture and an AB16 mixture with 50 % RAP rejuvenated with a soft binder. The evaluation included water sensitivity tests, studded tire abrasion tests, dynamic modulus tests, and indirect tensile fatigue tests. Finally, an Environmental Scanning Electron Microscope (ESEM) was utilized to analyze the distribution and action mechanisms of rejuvenator-loaded fibers within the asphalt mixture. Research results showed that aging improved indirect tensile strength (ITS) and dynamic modulus across asphalt mixtures. Rejuvenator-loaded fibers could enhance ITS values, stabilize the indirect tensile strength ratio (ITSR), and improve structural strength. Analysis of the fracture surface morphology revealed that these fibers were well dispersed and exhibited significant bridging effects within the mixture. However, these fibers reduced abrasion resistance over time. While initially beneficial, their effectiveness in prolonging fatigue life declined with extended aging, though they still mitigated deterioration under high stress. |
| format | Article |
| id | doaj-art-cbd23f128fea4037bc1e18625a372c49 |
| institution | Kabale University |
| issn | 2214-5095 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj-art-cbd23f128fea4037bc1e18625a372c492025-01-22T05:41:56ZengElsevierCase Studies in Construction Materials2214-50952025-07-0122e04289Effect of laboratory aging on the performance of asphalt mixture containing high RAP content with the rejuvenator-loaded fiberYuxuan Sun0Fan Zhang1Augusto Cannone Falchetto2Di Wang3Department of Civil Engineering, Aalto University, Rakentajanaukio 4, Espoo 02150, FinlandDepartment of Civil Engineering, Aalto University, Rakentajanaukio 4, Espoo 02150, FinlandDepartment of Civil Engineering, Aalto University, Rakentajanaukio 4, Espoo 02150, Finland; Department of Civil, Environmental and Architectural Engineering, University of Padova, Via Francesco Marzolo 9, Padova 35131, Italy; Corresponding author at: Department of Civil Engineering, Aalto University, Rakentajanaukio 4, Espoo 02150, Finland.Department of Civil Engineering, University of Ottawa, 800 King Edward Ave., Ottawa, ON K1N 6N5, CanadaThis study investigates the performance of recycled asphalt mixtures containing 50 % reclaimed asphalt pavement (RAP), focusing on the impact of rejuvenator-loaded fibers under various aging conditions: short-term aging (STA) and long-term aging at four (LTA4) and seven (LTA7) days. The mixtures were compared to a standard virgin AB16 asphalt mixture and an AB16 mixture with 50 % RAP rejuvenated with a soft binder. The evaluation included water sensitivity tests, studded tire abrasion tests, dynamic modulus tests, and indirect tensile fatigue tests. Finally, an Environmental Scanning Electron Microscope (ESEM) was utilized to analyze the distribution and action mechanisms of rejuvenator-loaded fibers within the asphalt mixture. Research results showed that aging improved indirect tensile strength (ITS) and dynamic modulus across asphalt mixtures. Rejuvenator-loaded fibers could enhance ITS values, stabilize the indirect tensile strength ratio (ITSR), and improve structural strength. Analysis of the fracture surface morphology revealed that these fibers were well dispersed and exhibited significant bridging effects within the mixture. However, these fibers reduced abrasion resistance over time. While initially beneficial, their effectiveness in prolonging fatigue life declined with extended aging, though they still mitigated deterioration under high stress.http://www.sciencedirect.com/science/article/pii/S2214509525000889Rejuvenator-loaded fiberLong-term agingDynamic modulusFatigue life |
| spellingShingle | Yuxuan Sun Fan Zhang Augusto Cannone Falchetto Di Wang Effect of laboratory aging on the performance of asphalt mixture containing high RAP content with the rejuvenator-loaded fiber Case Studies in Construction Materials Rejuvenator-loaded fiber Long-term aging Dynamic modulus Fatigue life |
| title | Effect of laboratory aging on the performance of asphalt mixture containing high RAP content with the rejuvenator-loaded fiber |
| title_full | Effect of laboratory aging on the performance of asphalt mixture containing high RAP content with the rejuvenator-loaded fiber |
| title_fullStr | Effect of laboratory aging on the performance of asphalt mixture containing high RAP content with the rejuvenator-loaded fiber |
| title_full_unstemmed | Effect of laboratory aging on the performance of asphalt mixture containing high RAP content with the rejuvenator-loaded fiber |
| title_short | Effect of laboratory aging on the performance of asphalt mixture containing high RAP content with the rejuvenator-loaded fiber |
| title_sort | effect of laboratory aging on the performance of asphalt mixture containing high rap content with the rejuvenator loaded fiber |
| topic | Rejuvenator-loaded fiber Long-term aging Dynamic modulus Fatigue life |
| url | http://www.sciencedirect.com/science/article/pii/S2214509525000889 |
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