Analysis of Optimal RAP Content Based on Discrete Element Method
Methods of recycling a large amount of waste asphalt mixture generated in pavement maintenance and decreasing the waste of existing resources are one of the problems that will be solved in the future. In this study, the mechanical parameters of asphalt mixture containing different amounts of RAP wer...
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| Format: | Article |
| Language: | English |
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Wiley
2022-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2022/2878848 |
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| author | Lei Wang Xiucheng Yang |
| author_facet | Lei Wang Xiucheng Yang |
| author_sort | Lei Wang |
| collection | DOAJ |
| description | Methods of recycling a large amount of waste asphalt mixture generated in pavement maintenance and decreasing the waste of existing resources are one of the problems that will be solved in the future. In this study, the mechanical parameters of asphalt mixture containing different amounts of RAP were analyzed by discrete element method (DEM), and the reasonable RAP content was discussed in combination with uniaxial compression test results. And it is considered that the contact between different particles will produce the failure of stress transfer between particles with different modulus, and the contact definition between RAP particles and virgin aggregate particles is added to make the discrete element model more in line with the actual situation. The results indicated that the trend of discrete element analysis was consistent with that of the uniaxial penetration test, but there were differences in the specific values. Uniaxial compression test results showed that the optimum RAP content of the recycled asphalt mixture was 30%. The optimal RAP content analysis result from the DEM simulation was smaller than the laboratory test result, and the theoretical optimal RAP content was 28%. The results of this study provide a reference for the mixture design of recycled asphalt mixture. |
| format | Article |
| id | doaj-art-b965edadb57e48378b6802bddec5d0e9 |
| institution | Kabale University |
| issn | 1687-8442 |
| language | English |
| publishDate | 2022-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-b965edadb57e48378b6802bddec5d0e92025-02-03T05:57:27ZengWileyAdvances in Materials Science and Engineering1687-84422022-01-01202210.1155/2022/2878848Analysis of Optimal RAP Content Based on Discrete Element MethodLei Wang0Xiucheng Yang1Guangzhou Highway Reconnaissance Design Co. Ltd.School of Civil EngineeringMethods of recycling a large amount of waste asphalt mixture generated in pavement maintenance and decreasing the waste of existing resources are one of the problems that will be solved in the future. In this study, the mechanical parameters of asphalt mixture containing different amounts of RAP were analyzed by discrete element method (DEM), and the reasonable RAP content was discussed in combination with uniaxial compression test results. And it is considered that the contact between different particles will produce the failure of stress transfer between particles with different modulus, and the contact definition between RAP particles and virgin aggregate particles is added to make the discrete element model more in line with the actual situation. The results indicated that the trend of discrete element analysis was consistent with that of the uniaxial penetration test, but there were differences in the specific values. Uniaxial compression test results showed that the optimum RAP content of the recycled asphalt mixture was 30%. The optimal RAP content analysis result from the DEM simulation was smaller than the laboratory test result, and the theoretical optimal RAP content was 28%. The results of this study provide a reference for the mixture design of recycled asphalt mixture.http://dx.doi.org/10.1155/2022/2878848 |
| spellingShingle | Lei Wang Xiucheng Yang Analysis of Optimal RAP Content Based on Discrete Element Method Advances in Materials Science and Engineering |
| title | Analysis of Optimal RAP Content Based on Discrete Element Method |
| title_full | Analysis of Optimal RAP Content Based on Discrete Element Method |
| title_fullStr | Analysis of Optimal RAP Content Based on Discrete Element Method |
| title_full_unstemmed | Analysis of Optimal RAP Content Based on Discrete Element Method |
| title_short | Analysis of Optimal RAP Content Based on Discrete Element Method |
| title_sort | analysis of optimal rap content based on discrete element method |
| url | http://dx.doi.org/10.1155/2022/2878848 |
| work_keys_str_mv | AT leiwang analysisofoptimalrapcontentbasedondiscreteelementmethod AT xiuchengyang analysisofoptimalrapcontentbasedondiscreteelementmethod |