Study on the Performances of PAC-13 Asphalt Mixture Containing Reclaimed Porous Asphalt Pavement
In south China, suffering from the rainiest climate, porous asphalt mixtures have been receiving increasing attention. However, with the increase in the application of pavement and the growth of service life, the importance of the recycling application of old reclaimed porous asphalt pavement (RPAP)...
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MDPI AG
2025-04-01
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| author | Fanlong Tang Jianwei Fan Tao Ma Yinhao Sun |
| author_facet | Fanlong Tang Jianwei Fan Tao Ma Yinhao Sun |
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| description | In south China, suffering from the rainiest climate, porous asphalt mixtures have been receiving increasing attention. However, with the increase in the application of pavement and the growth of service life, the importance of the recycling application of old reclaimed porous asphalt pavement (RPAP) has gradually become prominent. Based on this, this paper established RPAP content ranging from 0% to 30% in increments of 5% and designed experimental groups with and without regenerating agent to investigate the effects of RAP content and regenerating agent addition on the high-temperature stability, low- and normal-temperature crack resistance, moisture susceptibility, drainage capacity, and mechanical properties of PAC-13 reclaimed porous asphalt mixtures. Subsequently, the practical performance of PAC-13 RPAP was verified through a pavement test. The results indicate that, as the RPAP content increases, the high-temperature stability and mechanical properties of the recycled mixture improve. Specifically, as the planer content is increased to 30%, the dynamic stability of the regenerated porous asphalt increases by 61.1%, and the dynamic modulus at 25 Hz also shows an increase of 25.3%. However, the crack resistance, moisture susceptibility, and drainage capacity at both low temperatures and room temperature exhibited accelerated weakening. When the RPAP content increases to 30%, the reduction in failure strain of regenerated PAC-13 reaches 41.8%, and the reduction in submergence stability reaches 21%. Simultaneously, the water permeability coefficient, void ratio, and interconnected void ratio all demonstrate significant reductions of 23.5%, 6.5%, and 10.0%, respectively, indicating a diminished drainage capacity in the recycled porous pavement mixture. Then again, with the addition of the regenerant, the high-temperature stability of the regenerated porous mixture is reduced by 10.8%, and the mechanical properties are reduced by 6.48%, while the crack resistance at low temperature and room temperature, moisture susceptibility, and drainage ability are enhanced. The verification results of the test section demonstrate the feasibility of utilizing reclaimed asphalt pavement (RAP) material in the porous asphalt mixture. Additionally, it is recommended to select RAP material with a particle size of 4.75 mm or larger while ensuring that the proportion of RAP does not exceed 20%. The research findings of this paper are anticipated to offer guidance for the preparation of PAC-13 reclaimed porous asphalt mixtures while facilitating the recycling and large-scale utilization of old porous pavement materials. |
| format | Article |
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| language | English |
| publishDate | 2025-04-01 |
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| spelling | doaj-art-c67af5a0cea84b6fb7a71dcebcd430eb2025-08-20T01:49:11ZengMDPI AGBuildings2075-53092025-04-01159139510.3390/buildings15091395Study on the Performances of PAC-13 Asphalt Mixture Containing Reclaimed Porous Asphalt PavementFanlong Tang0Jianwei Fan1Tao Ma2Yinhao Sun3College of Network and Communication Engineering, Jinling Institute of Technology, Nanjing 211169, ChinaSchool of Transportation, Southeast University, Nanjing 210096, ChinaSchool of Transportation, Southeast University, Nanjing 210096, ChinaChina Railway Construction Urban Construction Transportation Development Co., Ltd., Suzhou 215000, ChinaIn south China, suffering from the rainiest climate, porous asphalt mixtures have been receiving increasing attention. However, with the increase in the application of pavement and the growth of service life, the importance of the recycling application of old reclaimed porous asphalt pavement (RPAP) has gradually become prominent. Based on this, this paper established RPAP content ranging from 0% to 30% in increments of 5% and designed experimental groups with and without regenerating agent to investigate the effects of RAP content and regenerating agent addition on the high-temperature stability, low- and normal-temperature crack resistance, moisture susceptibility, drainage capacity, and mechanical properties of PAC-13 reclaimed porous asphalt mixtures. Subsequently, the practical performance of PAC-13 RPAP was verified through a pavement test. The results indicate that, as the RPAP content increases, the high-temperature stability and mechanical properties of the recycled mixture improve. Specifically, as the planer content is increased to 30%, the dynamic stability of the regenerated porous asphalt increases by 61.1%, and the dynamic modulus at 25 Hz also shows an increase of 25.3%. However, the crack resistance, moisture susceptibility, and drainage capacity at both low temperatures and room temperature exhibited accelerated weakening. When the RPAP content increases to 30%, the reduction in failure strain of regenerated PAC-13 reaches 41.8%, and the reduction in submergence stability reaches 21%. Simultaneously, the water permeability coefficient, void ratio, and interconnected void ratio all demonstrate significant reductions of 23.5%, 6.5%, and 10.0%, respectively, indicating a diminished drainage capacity in the recycled porous pavement mixture. Then again, with the addition of the regenerant, the high-temperature stability of the regenerated porous mixture is reduced by 10.8%, and the mechanical properties are reduced by 6.48%, while the crack resistance at low temperature and room temperature, moisture susceptibility, and drainage ability are enhanced. The verification results of the test section demonstrate the feasibility of utilizing reclaimed asphalt pavement (RAP) material in the porous asphalt mixture. Additionally, it is recommended to select RAP material with a particle size of 4.75 mm or larger while ensuring that the proportion of RAP does not exceed 20%. The research findings of this paper are anticipated to offer guidance for the preparation of PAC-13 reclaimed porous asphalt mixtures while facilitating the recycling and large-scale utilization of old porous pavement materials.https://www.mdpi.com/2075-5309/15/9/1395road engineeringporous asphalt pavementroad performancerecycled PAC-13 mixturereclaimed asphalt pavement content |
| spellingShingle | Fanlong Tang Jianwei Fan Tao Ma Yinhao Sun Study on the Performances of PAC-13 Asphalt Mixture Containing Reclaimed Porous Asphalt Pavement Buildings road engineering porous asphalt pavement road performance recycled PAC-13 mixture reclaimed asphalt pavement content |
| title | Study on the Performances of PAC-13 Asphalt Mixture Containing Reclaimed Porous Asphalt Pavement |
| title_full | Study on the Performances of PAC-13 Asphalt Mixture Containing Reclaimed Porous Asphalt Pavement |
| title_fullStr | Study on the Performances of PAC-13 Asphalt Mixture Containing Reclaimed Porous Asphalt Pavement |
| title_full_unstemmed | Study on the Performances of PAC-13 Asphalt Mixture Containing Reclaimed Porous Asphalt Pavement |
| title_short | Study on the Performances of PAC-13 Asphalt Mixture Containing Reclaimed Porous Asphalt Pavement |
| title_sort | study on the performances of pac 13 asphalt mixture containing reclaimed porous asphalt pavement |
| topic | road engineering porous asphalt pavement road performance recycled PAC-13 mixture reclaimed asphalt pavement content |
| url | https://www.mdpi.com/2075-5309/15/9/1395 |
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