Quantitative study on carbon emissions of modified recycled asphalt mixture based on life cycle assessment method
The recycled asphalt technology is considered to have environmental sustainability prospects due to the resource conservation of old material recycling. Nonetheless, how to quantitatively evaluate the environmental impact of the entire life cycle of recycled asphalt pavement (RAP) still needs to be...
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Elsevier
2024-12-01
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| Series: | Developments in the Built Environment |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666165924002655 |
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| author | Xiaohua Liu Lu Deng Henglong Zhang Jiangmiao Yu |
| author_facet | Xiaohua Liu Lu Deng Henglong Zhang Jiangmiao Yu |
| author_sort | Xiaohua Liu |
| collection | DOAJ |
| description | The recycled asphalt technology is considered to have environmental sustainability prospects due to the resource conservation of old material recycling. Nonetheless, how to quantitatively evaluate the environmental impact of the entire life cycle of recycled asphalt pavement (RAP) still needs to be sorted out. Based on the theory of life cycle management, through the Life-cycle assessment (LCA) method, this study establishes a quantitative assessment model for the environmental impact of recycled asphalt pavement. A quantitative assessment model is established for the full life cycle environmental impact of recycled asphalt pavement. The model can output a list of environmental impacts for each stage of the life cycle, and can also conduct characteristic impact assessments based on five major impact categories: energy consumption (EC), global warming potential (GWP), acidification potential (AP), human health hazards (HTP), and particulate matter emissions. The results indicate that the acquisition of raw materials is the dominant stage for the environmental impact of cold recycled asphalt pavement, with a proportion of over 50% for each major impact category. In the construction of highways, using recycled modified asphalt mixture can reduce the total emissions by 12,976 kg per kilometer. In addition, the life cycle inventory (LCI) analysis shows that the environmental impact of recycled asphalt pavement is mainly quantified by energy consumption and various pollutant emissions, such as CO2, CH4, SO2, CO, N2O, NMVOC, particulate matter, and asphalt smoke. The raw material extraction stage has been identified as the stage with the greatest environmental impact, making significant contributions in energy consumption, global warming potential, acidification potential, human health hazards, and particulate matter emissions. This indicates that utilizing cold recycling technology and increasing the use of recycled RAP materials are efficient ways to promote energy conservation, reduce emissions, and minimize the environmental impact of asphalt pavement throughout its lifecycle. |
| format | Article |
| id | doaj-art-e196ce11c07a4ce5a3c0f5cd55b305f8 |
| institution | DOAJ |
| issn | 2666-1659 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Developments in the Built Environment |
| spelling | doaj-art-e196ce11c07a4ce5a3c0f5cd55b305f82025-08-20T02:49:35ZengElsevierDevelopments in the Built Environment2666-16592024-12-012010058410.1016/j.dibe.2024.100584Quantitative study on carbon emissions of modified recycled asphalt mixture based on life cycle assessment methodXiaohua Liu0Lu Deng1Henglong Zhang2Jiangmiao Yu3College of Civil Engineering, Hunan University, Changsha, China; Shenzhen General Integrated Transportation and Municipal Engineering Design & Research Institute Co, Ltd, Shenzhen, ChinaCollege of Civil Engineering, Hunan University, Changsha, China; Key Laboratory of Damage Diagnosis for Engineering Structures of Hunan Province, Hunan University, Changsha, China; Corresponding author. College of Civil Engineering, Hunan University, Changsha, China.College of Civil Engineering, Hunan University, Changsha, ChinaSchool of Civil Engineering and Transportation, South China University of Technology, Guangzhou, China; Central Fortune Creation (Canton) Roadway Technology Co., Ltd., Guangzhou, ChinaThe recycled asphalt technology is considered to have environmental sustainability prospects due to the resource conservation of old material recycling. Nonetheless, how to quantitatively evaluate the environmental impact of the entire life cycle of recycled asphalt pavement (RAP) still needs to be sorted out. Based on the theory of life cycle management, through the Life-cycle assessment (LCA) method, this study establishes a quantitative assessment model for the environmental impact of recycled asphalt pavement. A quantitative assessment model is established for the full life cycle environmental impact of recycled asphalt pavement. The model can output a list of environmental impacts for each stage of the life cycle, and can also conduct characteristic impact assessments based on five major impact categories: energy consumption (EC), global warming potential (GWP), acidification potential (AP), human health hazards (HTP), and particulate matter emissions. The results indicate that the acquisition of raw materials is the dominant stage for the environmental impact of cold recycled asphalt pavement, with a proportion of over 50% for each major impact category. In the construction of highways, using recycled modified asphalt mixture can reduce the total emissions by 12,976 kg per kilometer. In addition, the life cycle inventory (LCI) analysis shows that the environmental impact of recycled asphalt pavement is mainly quantified by energy consumption and various pollutant emissions, such as CO2, CH4, SO2, CO, N2O, NMVOC, particulate matter, and asphalt smoke. The raw material extraction stage has been identified as the stage with the greatest environmental impact, making significant contributions in energy consumption, global warming potential, acidification potential, human health hazards, and particulate matter emissions. This indicates that utilizing cold recycling technology and increasing the use of recycled RAP materials are efficient ways to promote energy conservation, reduce emissions, and minimize the environmental impact of asphalt pavement throughout its lifecycle.http://www.sciencedirect.com/science/article/pii/S2666165924002655Recycled asphalt pavementLCACarbon emissionsQuantitative evaluation |
| spellingShingle | Xiaohua Liu Lu Deng Henglong Zhang Jiangmiao Yu Quantitative study on carbon emissions of modified recycled asphalt mixture based on life cycle assessment method Developments in the Built Environment Recycled asphalt pavement LCA Carbon emissions Quantitative evaluation |
| title | Quantitative study on carbon emissions of modified recycled asphalt mixture based on life cycle assessment method |
| title_full | Quantitative study on carbon emissions of modified recycled asphalt mixture based on life cycle assessment method |
| title_fullStr | Quantitative study on carbon emissions of modified recycled asphalt mixture based on life cycle assessment method |
| title_full_unstemmed | Quantitative study on carbon emissions of modified recycled asphalt mixture based on life cycle assessment method |
| title_short | Quantitative study on carbon emissions of modified recycled asphalt mixture based on life cycle assessment method |
| title_sort | quantitative study on carbon emissions of modified recycled asphalt mixture based on life cycle assessment method |
| topic | Recycled asphalt pavement LCA Carbon emissions Quantitative evaluation |
| url | http://www.sciencedirect.com/science/article/pii/S2666165924002655 |
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