Aging of Rejuvenated Asphalt Binders
An important concern that limits the RAP content in asphalt mixtures is the fact that the aged binder that is present in the RAP can cause premature cracking. Rejuvenators are frequently added to high RAP mixtures to enhance the properties of the binder. There is no existing method to predict the lo...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2017-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2017/8426475 |
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| author | Mojtaba Mohammadafzali Hesham Ali James A. Musselman Gregory A. Sholar Wayne A. Rilko |
| author_facet | Mojtaba Mohammadafzali Hesham Ali James A. Musselman Gregory A. Sholar Wayne A. Rilko |
| author_sort | Mojtaba Mohammadafzali |
| collection | DOAJ |
| description | An important concern that limits the RAP content in asphalt mixtures is the fact that the aged binder that is present in the RAP can cause premature cracking. Rejuvenators are frequently added to high RAP mixtures to enhance the properties of the binder. There is no existing method to predict the longevity of a rejuvenated asphalt. This study investigated the aging of rejuvenated binders and compared their durability with that of virgin asphalt. Various samples with different types and proportions of RAP, virgin binder, and rejuvenator were aged by RTFO and three cycles of PAV. DSR and BBR tests were conducted to examine the high-temperature and low-temperature rheological properties of binders. Results indicated that the type and dosage of the rejuvenator have a great influence on the aging rate and durability of the binder. Some rejuvenators make the binder age slower, while others accelerate aging. These observations confirm the importance of evaluating the long-term aging of recycled binders. For this purpose, critical PAV time was proposed as a measure of binder’s longevity. |
| format | Article |
| id | doaj-art-35b38f18919d4b16b24b51fc8c08e6a7 |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2017-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-35b38f18919d4b16b24b51fc8c08e6a72025-08-20T03:55:16ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422017-01-01201710.1155/2017/84264758426475Aging of Rejuvenated Asphalt BindersMojtaba Mohammadafzali0Hesham Ali1James A. Musselman2Gregory A. Sholar3Wayne A. Rilko4Department of Civil and Environmental Engineering, Florida International University, Miami, FL, USADepartment of Civil and Environmental Engineering, Florida International University, Miami, FL, USAOldcastle Materials Group, FL, USAState Material Office, Florida Department of Transportation, Gainesville, FL, USAState Material Office, Florida Department of Transportation, Gainesville, FL, USAAn important concern that limits the RAP content in asphalt mixtures is the fact that the aged binder that is present in the RAP can cause premature cracking. Rejuvenators are frequently added to high RAP mixtures to enhance the properties of the binder. There is no existing method to predict the longevity of a rejuvenated asphalt. This study investigated the aging of rejuvenated binders and compared their durability with that of virgin asphalt. Various samples with different types and proportions of RAP, virgin binder, and rejuvenator were aged by RTFO and three cycles of PAV. DSR and BBR tests were conducted to examine the high-temperature and low-temperature rheological properties of binders. Results indicated that the type and dosage of the rejuvenator have a great influence on the aging rate and durability of the binder. Some rejuvenators make the binder age slower, while others accelerate aging. These observations confirm the importance of evaluating the long-term aging of recycled binders. For this purpose, critical PAV time was proposed as a measure of binder’s longevity.http://dx.doi.org/10.1155/2017/8426475 |
| spellingShingle | Mojtaba Mohammadafzali Hesham Ali James A. Musselman Gregory A. Sholar Wayne A. Rilko Aging of Rejuvenated Asphalt Binders Advances in Materials Science and Engineering |
| title | Aging of Rejuvenated Asphalt Binders |
| title_full | Aging of Rejuvenated Asphalt Binders |
| title_fullStr | Aging of Rejuvenated Asphalt Binders |
| title_full_unstemmed | Aging of Rejuvenated Asphalt Binders |
| title_short | Aging of Rejuvenated Asphalt Binders |
| title_sort | aging of rejuvenated asphalt binders |
| url | http://dx.doi.org/10.1155/2017/8426475 |
| work_keys_str_mv | AT mojtabamohammadafzali agingofrejuvenatedasphaltbinders AT heshamali agingofrejuvenatedasphaltbinders AT jamesamusselman agingofrejuvenatedasphaltbinders AT gregoryasholar agingofrejuvenatedasphaltbinders AT waynearilko agingofrejuvenatedasphaltbinders |