Regenerative and Innovative Utilization of Coffee Residue and Waste Cooking Oil: Improving Rheological Properties of Recycled Asphalt
Currently, there is limited research on the utilization of spent coffee grounds (SCG) in asphalt pavement. This study explores using SCG as a novel rejuvenator together with waste cooking oil (WCO) to enhance the performance of aged asphalt (AA). The high-temperature performance of recycled asphalt...
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MDPI AG
2024-12-01
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| author | Ruipeng Zhu Chunhua Hu |
| author_facet | Ruipeng Zhu Chunhua Hu |
| author_sort | Ruipeng Zhu |
| collection | DOAJ |
| description | Currently, there is limited research on the utilization of spent coffee grounds (SCG) in asphalt pavement. This study explores using SCG as a novel rejuvenator together with waste cooking oil (WCO) to enhance the performance of aged asphalt (AA). The high-temperature performance of recycled asphalt was preserved using SCG containing oily components. However, the low-temperature performance of long-term aged asphalt could not be completely restored to the level of virgin asphalt. Therefore, various dosages of SCG and WCO were utilized to optimize the recovery of low-temperature properties while maintaining high-temperature performance. The recycled asphalt (RA) was analyzed through conventional indexes, microscopic characteristics, and rheological properties using penetration and softening point tests, Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and a dynamic shear rheometer (DSR). The results showed that the G* of W<sub>7</sub>S<sub>12</sub> increased by 90% relative to virgin asphalt. Additionally, at strain levels of 2.5% and 5%, the fatigue life of W<sub>8</sub>S<sub>18</sub> was approximately 3.39 times and 2.34 times greater, respectively, than that of the virgin asphalt. The addition of a rejuvenator can enhance the low-temperature cracking resistance of aged asphalt. Moreover, the FTIR results indicated that the regeneration mechanism of recycled asphalt consisted of physical blending. In summary, W<sub>7</sub>S<sub>12</sub> exhibited the highest high-temperature performance, while W<sub>8</sub>S<sub>18</sub> demonstrated superior fatigue life. This study may promote the sustainable development of asphalt pavements by utilizing organic waste as a rejuvenator through resource recovery. |
| format | Article |
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| institution | Kabale University |
| issn | 2075-5309 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | MDPI AG |
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| series | Buildings |
| spelling | doaj-art-f5cfa5f4a80b46dd8e65c0807d6b7a262025-01-10T13:15:54ZengMDPI AGBuildings2075-53092024-12-011515410.3390/buildings15010054Regenerative and Innovative Utilization of Coffee Residue and Waste Cooking Oil: Improving Rheological Properties of Recycled AsphaltRuipeng Zhu0Chunhua Hu1School of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan 430068, ChinaSchool of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan 430068, ChinaCurrently, there is limited research on the utilization of spent coffee grounds (SCG) in asphalt pavement. This study explores using SCG as a novel rejuvenator together with waste cooking oil (WCO) to enhance the performance of aged asphalt (AA). The high-temperature performance of recycled asphalt was preserved using SCG containing oily components. However, the low-temperature performance of long-term aged asphalt could not be completely restored to the level of virgin asphalt. Therefore, various dosages of SCG and WCO were utilized to optimize the recovery of low-temperature properties while maintaining high-temperature performance. The recycled asphalt (RA) was analyzed through conventional indexes, microscopic characteristics, and rheological properties using penetration and softening point tests, Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and a dynamic shear rheometer (DSR). The results showed that the G* of W<sub>7</sub>S<sub>12</sub> increased by 90% relative to virgin asphalt. Additionally, at strain levels of 2.5% and 5%, the fatigue life of W<sub>8</sub>S<sub>18</sub> was approximately 3.39 times and 2.34 times greater, respectively, than that of the virgin asphalt. The addition of a rejuvenator can enhance the low-temperature cracking resistance of aged asphalt. Moreover, the FTIR results indicated that the regeneration mechanism of recycled asphalt consisted of physical blending. In summary, W<sub>7</sub>S<sub>12</sub> exhibited the highest high-temperature performance, while W<sub>8</sub>S<sub>18</sub> demonstrated superior fatigue life. This study may promote the sustainable development of asphalt pavements by utilizing organic waste as a rejuvenator through resource recovery.https://www.mdpi.com/2075-5309/15/1/54aged asphaltrejuvenatorspent coffee groundswaste cooking oilrecycled asphaltrheological properties |
| spellingShingle | Ruipeng Zhu Chunhua Hu Regenerative and Innovative Utilization of Coffee Residue and Waste Cooking Oil: Improving Rheological Properties of Recycled Asphalt Buildings aged asphalt rejuvenator spent coffee grounds waste cooking oil recycled asphalt rheological properties |
| title | Regenerative and Innovative Utilization of Coffee Residue and Waste Cooking Oil: Improving Rheological Properties of Recycled Asphalt |
| title_full | Regenerative and Innovative Utilization of Coffee Residue and Waste Cooking Oil: Improving Rheological Properties of Recycled Asphalt |
| title_fullStr | Regenerative and Innovative Utilization of Coffee Residue and Waste Cooking Oil: Improving Rheological Properties of Recycled Asphalt |
| title_full_unstemmed | Regenerative and Innovative Utilization of Coffee Residue and Waste Cooking Oil: Improving Rheological Properties of Recycled Asphalt |
| title_short | Regenerative and Innovative Utilization of Coffee Residue and Waste Cooking Oil: Improving Rheological Properties of Recycled Asphalt |
| title_sort | regenerative and innovative utilization of coffee residue and waste cooking oil improving rheological properties of recycled asphalt |
| topic | aged asphalt rejuvenator spent coffee grounds waste cooking oil recycled asphalt rheological properties |
| url | https://www.mdpi.com/2075-5309/15/1/54 |
| work_keys_str_mv | AT ruipengzhu regenerativeandinnovativeutilizationofcoffeeresidueandwastecookingoilimprovingrheologicalpropertiesofrecycledasphalt AT chunhuahu regenerativeandinnovativeutilizationofcoffeeresidueandwastecookingoilimprovingrheologicalpropertiesofrecycledasphalt |