Evaluation of the Rheological Properties of Virgin and Aged Asphalt Blends
To evaluate the effects of the source and admixture of aged asphalt on the rheological properties of reclaimed asphalt binders, the relative viscosity (Δ<i>η</i>), relative rutting factor (ΔG*/sinδ), and relative fatigue factor (ΔG*sinδ) were selected as evaluation indicators based on th...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-09-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/14/17/3623 |
| _version_ | 1797493492364083200 |
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| author | Tao Liu Weidang Duan Jialin Zhang Qiuping Li Jian Xu Jie Wang Yongchun Qin Rong Chang |
| author_facet | Tao Liu Weidang Duan Jialin Zhang Qiuping Li Jian Xu Jie Wang Yongchun Qin Rong Chang |
| author_sort | Tao Liu |
| collection | DOAJ |
| description | To evaluate the effects of the source and admixture of aged asphalt on the rheological properties of reclaimed asphalt binders, the relative viscosity (Δ<i>η</i>), relative rutting factor (ΔG*/sinδ), and relative fatigue factor (ΔG*sinδ) were selected as evaluation indicators based on the Strategic Highway Research Program (SHRP) tests to characterize the rheological properties of a reclaimed asphalt binder under medium- and high-temperature conditions. The results of the study showed that the viscosity, rutting factor, and fatigue factor of the reclaimed asphalt binder increased with the addition of aged asphalt; however, the effect of the source and admixture of aged asphalt could not be assessed. The relative viscosity, relative rutting factor, and relative fatigue factor are sensitive to the source, admixture, temperature, and aging conditions, which shows the superiority of these indicators. Moreover, the relative viscosity and relative rutting factor decreased linearly with increasing temperature under high-temperature conditions, while the relative fatigue factor increased linearly with increasing temperature under medium-temperature conditions. In addition, the linear trends of the three indicators were independent of the source and admixture of aged asphalt. These results indicate that the evaluation method used in this study can be used to assess the effects of virgin asphalt and aged asphalt on the rheological properties of reclaimed asphalt binders, and has the potential for application. The viscosity of recycled asphalt increases, and the rutting factor and fatigue factor both increase. The high-temperature stability of reclaimed asphalt is improved, and the fatigue crack resistance is weakened. |
| first_indexed | 2024-03-10T01:20:46Z |
| format | Article |
| id | doaj.art-35ca51009b8045cea30b59413cfcdd49 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-10T01:20:46Z |
| publishDate | 2022-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-35ca51009b8045cea30b59413cfcdd492023-11-23T14:00:03ZengMDPI AGPolymers2073-43602022-09-011417362310.3390/polym14173623Evaluation of the Rheological Properties of Virgin and Aged Asphalt BlendsTao Liu0Weidang Duan1Jialin Zhang2Qiuping Li3Jian Xu4Jie Wang5Yongchun Qin6Rong Chang7Jiangxi Provincial Communications Investment Group Co., Ltd., Nanchang 330025, ChinaJiangxi Provincial Communications Investment Group Co., Ltd., Nanchang 330025, ChinaJiangxi Provincial Communications Investment Group Co., Ltd., Nanchang 330025, ChinaJiangxi Provincial Communications Investment Group Co., Ltd., Nanchang 330025, ChinaResearch Institute of Highway, Ministry of Transport, Beijing 100088, ChinaResearch Institute of Highway, Ministry of Transport, Beijing 100088, ChinaResearch Institute of Highway, Ministry of Transport, Beijing 100088, ChinaResearch Institute of Highway, Ministry of Transport, Beijing 100088, ChinaTo evaluate the effects of the source and admixture of aged asphalt on the rheological properties of reclaimed asphalt binders, the relative viscosity (Δ<i>η</i>), relative rutting factor (ΔG*/sinδ), and relative fatigue factor (ΔG*sinδ) were selected as evaluation indicators based on the Strategic Highway Research Program (SHRP) tests to characterize the rheological properties of a reclaimed asphalt binder under medium- and high-temperature conditions. The results of the study showed that the viscosity, rutting factor, and fatigue factor of the reclaimed asphalt binder increased with the addition of aged asphalt; however, the effect of the source and admixture of aged asphalt could not be assessed. The relative viscosity, relative rutting factor, and relative fatigue factor are sensitive to the source, admixture, temperature, and aging conditions, which shows the superiority of these indicators. Moreover, the relative viscosity and relative rutting factor decreased linearly with increasing temperature under high-temperature conditions, while the relative fatigue factor increased linearly with increasing temperature under medium-temperature conditions. In addition, the linear trends of the three indicators were independent of the source and admixture of aged asphalt. These results indicate that the evaluation method used in this study can be used to assess the effects of virgin asphalt and aged asphalt on the rheological properties of reclaimed asphalt binders, and has the potential for application. The viscosity of recycled asphalt increases, and the rutting factor and fatigue factor both increase. The high-temperature stability of reclaimed asphalt is improved, and the fatigue crack resistance is weakened.https://www.mdpi.com/2073-4360/14/17/3623road engineeringreclaimed asphalt binderrheological propertiesSHRP testvariance analysis |
| spellingShingle | Tao Liu Weidang Duan Jialin Zhang Qiuping Li Jian Xu Jie Wang Yongchun Qin Rong Chang Evaluation of the Rheological Properties of Virgin and Aged Asphalt Blends Polymers road engineering reclaimed asphalt binder rheological properties SHRP test variance analysis |
| title | Evaluation of the Rheological Properties of Virgin and Aged Asphalt Blends |
| title_full | Evaluation of the Rheological Properties of Virgin and Aged Asphalt Blends |
| title_fullStr | Evaluation of the Rheological Properties of Virgin and Aged Asphalt Blends |
| title_full_unstemmed | Evaluation of the Rheological Properties of Virgin and Aged Asphalt Blends |
| title_short | Evaluation of the Rheological Properties of Virgin and Aged Asphalt Blends |
| title_sort | evaluation of the rheological properties of virgin and aged asphalt blends |
| topic | road engineering reclaimed asphalt binder rheological properties SHRP test variance analysis |
| url | https://www.mdpi.com/2073-4360/14/17/3623 |
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