Influence of the Hot-Mix Asphalt Production Temperature on the Effectiveness of the Reclaimed Asphalt Rejuvenation Process
Hot recycling of reclaimed asphalt pavement (RAP) into new hot-mix asphalt (HMA) is a complex process that must be precisely calibrated in the asphalt plants. In particular, temperature is a key parameter that, if inadequately set, can affect the final mix performance as it influences the RAP binder...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-12-01
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| Series: | Infrastructures |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2412-3811/8/1/8 |
| _version_ | 1797440937728671744 |
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| author | Edoardo Bocci Emiliano Prosperi Maurizio Bocci |
| author_facet | Edoardo Bocci Emiliano Prosperi Maurizio Bocci |
| author_sort | Edoardo Bocci |
| collection | DOAJ |
| description | Hot recycling of reclaimed asphalt pavement (RAP) into new hot-mix asphalt (HMA) is a complex process that must be precisely calibrated in the asphalt plants. In particular, temperature is a key parameter that, if inadequately set, can affect the final mix performance as it influences the RAP binder mobilization rate and the severity of bitumen short-term aging. The present paper aims at evaluating the effect of HMA production temperature on the behavior of mixtures including 50% of RAP and two types of rejuvenating agents. In particular, volumetric, mechanical, chemical, and rheological properties of the mixes and binder-aggregate adhesion have been investigated on the HMA produced in the laboratory at 140 °C or 170 °C. The results showed that the adoption of a lower production temperature did not significantly influence the air voids content in the mix, but determined a less stiff, brittle and cracking-prone behavior. Moreover, the decrease of the HMA production temperature was profitable for the increase of bitumen-aggregate adhesion. |
| first_indexed | 2024-03-09T12:15:40Z |
| format | Article |
| id | doaj.art-3c2bd623a1c74aaf9c85a66847791cba |
| institution | Directory Open Access Journal |
| issn | 2412-3811 |
| language | English |
| last_indexed | 2024-03-09T12:15:40Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Infrastructures |
| spelling | doaj.art-3c2bd623a1c74aaf9c85a66847791cba2023-11-30T22:46:49ZengMDPI AGInfrastructures2412-38112022-12-0181810.3390/infrastructures8010008Influence of the Hot-Mix Asphalt Production Temperature on the Effectiveness of the Reclaimed Asphalt Rejuvenation ProcessEdoardo Bocci0Emiliano Prosperi1Maurizio Bocci2Faculty of Engineering, Università eCampus, 22060 Novedrate, ItalyDepartment of Construction, Civil Engineering and Architecture, Università Politecnica delle Marche, 60131 Ancona, ItalyDepartment of Construction, Civil Engineering and Architecture, Università Politecnica delle Marche, 60131 Ancona, ItalyHot recycling of reclaimed asphalt pavement (RAP) into new hot-mix asphalt (HMA) is a complex process that must be precisely calibrated in the asphalt plants. In particular, temperature is a key parameter that, if inadequately set, can affect the final mix performance as it influences the RAP binder mobilization rate and the severity of bitumen short-term aging. The present paper aims at evaluating the effect of HMA production temperature on the behavior of mixtures including 50% of RAP and two types of rejuvenating agents. In particular, volumetric, mechanical, chemical, and rheological properties of the mixes and binder-aggregate adhesion have been investigated on the HMA produced in the laboratory at 140 °C or 170 °C. The results showed that the adoption of a lower production temperature did not significantly influence the air voids content in the mix, but determined a less stiff, brittle and cracking-prone behavior. Moreover, the decrease of the HMA production temperature was profitable for the increase of bitumen-aggregate adhesion.https://www.mdpi.com/2412-3811/8/1/8hot-mix asphaltreclaimed asphalthot recyclingtemperatureadhesionFTIR |
| spellingShingle | Edoardo Bocci Emiliano Prosperi Maurizio Bocci Influence of the Hot-Mix Asphalt Production Temperature on the Effectiveness of the Reclaimed Asphalt Rejuvenation Process Infrastructures hot-mix asphalt reclaimed asphalt hot recycling temperature adhesion FTIR |
| title | Influence of the Hot-Mix Asphalt Production Temperature on the Effectiveness of the Reclaimed Asphalt Rejuvenation Process |
| title_full | Influence of the Hot-Mix Asphalt Production Temperature on the Effectiveness of the Reclaimed Asphalt Rejuvenation Process |
| title_fullStr | Influence of the Hot-Mix Asphalt Production Temperature on the Effectiveness of the Reclaimed Asphalt Rejuvenation Process |
| title_full_unstemmed | Influence of the Hot-Mix Asphalt Production Temperature on the Effectiveness of the Reclaimed Asphalt Rejuvenation Process |
| title_short | Influence of the Hot-Mix Asphalt Production Temperature on the Effectiveness of the Reclaimed Asphalt Rejuvenation Process |
| title_sort | influence of the hot mix asphalt production temperature on the effectiveness of the reclaimed asphalt rejuvenation process |
| topic | hot-mix asphalt reclaimed asphalt hot recycling temperature adhesion FTIR |
| url | https://www.mdpi.com/2412-3811/8/1/8 |
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