Physical Properties, Chemical Structure, and Microstructure of Thermoplastic Polyurethane Recycled Material-Modified Asphalt
Firstly, thermoplastic polyurethane recycled material (TPRM) particles were used to prepare modified asphalt. Then, the modified asphalt’s physical properties were investigated. The results show that the TPRM particles improved its high-temperature performance, low-temperature crack resistance, and...
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MDPI AG
2025-01-01
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| author | Peng Yang Peiliang Cong Hongjie Hao Pengfei Xiong |
| author_facet | Peng Yang Peiliang Cong Hongjie Hao Pengfei Xiong |
| author_sort | Peng Yang |
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| description | Firstly, thermoplastic polyurethane recycled material (TPRM) particles were used to prepare modified asphalt. Then, the modified asphalt’s physical properties were investigated. The results show that the TPRM particles improved its high-temperature performance, low-temperature crack resistance, and shear behavior due to its increased cohesion and low-temperature fracture energy levels. Thermal susceptibility was affected by the degree of swelling and dissolution of the TPRM particles, the composition of the asphalt, and the interface effect between the asphalt molecules and both the regular and slender–irregular TPRM particles. The TPRM particles swelled and dissolved after absorbing the light components of asphalt. Changes in the shearing temperature and time made the TPRM particles swell and dissolve more than changes in the activation temperature and time. An increase in the shearing/activation temperature and time increased the hydrogen bond content in the modified asphalt due to the rearrangement of the polyurethane’s molecular structure and the hydrogen bonds formed by the asphaltene and polyurethane molecules. Slender–irregular TPRM and “sea–island” and hilly and gulley structures were found in the modified asphalt matrix. |
| format | Article |
| id | doaj-art-bf39cd858e1d4c03b878ddd154772412 |
| institution | Kabale University |
| issn | 2075-5309 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
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| series | Buildings |
| spelling | doaj-art-bf39cd858e1d4c03b878ddd1547724122025-01-24T13:26:27ZengMDPI AGBuildings2075-53092025-01-0115228110.3390/buildings15020281Physical Properties, Chemical Structure, and Microstructure of Thermoplastic Polyurethane Recycled Material-Modified AsphaltPeng Yang0Peiliang Cong1Hongjie Hao2Pengfei Xiong3School of Civil Engineering and Management, Guangzhou Maritime University, Guangzhou 510725, ChinaSchool of Materials Science and Engineering, Chang’an University, Xi’an 710064, ChinaSchool of Materials Science and Engineering, Chang’an University, Xi’an 710064, ChinaGuangdong Communication Planning & Design Institute Group Co., Ltd., Guangzhou 510440, ChinaFirstly, thermoplastic polyurethane recycled material (TPRM) particles were used to prepare modified asphalt. Then, the modified asphalt’s physical properties were investigated. The results show that the TPRM particles improved its high-temperature performance, low-temperature crack resistance, and shear behavior due to its increased cohesion and low-temperature fracture energy levels. Thermal susceptibility was affected by the degree of swelling and dissolution of the TPRM particles, the composition of the asphalt, and the interface effect between the asphalt molecules and both the regular and slender–irregular TPRM particles. The TPRM particles swelled and dissolved after absorbing the light components of asphalt. Changes in the shearing temperature and time made the TPRM particles swell and dissolve more than changes in the activation temperature and time. An increase in the shearing/activation temperature and time increased the hydrogen bond content in the modified asphalt due to the rearrangement of the polyurethane’s molecular structure and the hydrogen bonds formed by the asphaltene and polyurethane molecules. Slender–irregular TPRM and “sea–island” and hilly and gulley structures were found in the modified asphalt matrix.https://www.mdpi.com/2075-5309/15/2/281thermoplastic polyurethane recycled materialmodified asphaltphysical propertieschemical structuremicrostructure |
| spellingShingle | Peng Yang Peiliang Cong Hongjie Hao Pengfei Xiong Physical Properties, Chemical Structure, and Microstructure of Thermoplastic Polyurethane Recycled Material-Modified Asphalt Buildings thermoplastic polyurethane recycled material modified asphalt physical properties chemical structure microstructure |
| title | Physical Properties, Chemical Structure, and Microstructure of Thermoplastic Polyurethane Recycled Material-Modified Asphalt |
| title_full | Physical Properties, Chemical Structure, and Microstructure of Thermoplastic Polyurethane Recycled Material-Modified Asphalt |
| title_fullStr | Physical Properties, Chemical Structure, and Microstructure of Thermoplastic Polyurethane Recycled Material-Modified Asphalt |
| title_full_unstemmed | Physical Properties, Chemical Structure, and Microstructure of Thermoplastic Polyurethane Recycled Material-Modified Asphalt |
| title_short | Physical Properties, Chemical Structure, and Microstructure of Thermoplastic Polyurethane Recycled Material-Modified Asphalt |
| title_sort | physical properties chemical structure and microstructure of thermoplastic polyurethane recycled material modified asphalt |
| topic | thermoplastic polyurethane recycled material modified asphalt physical properties chemical structure microstructure |
| url | https://www.mdpi.com/2075-5309/15/2/281 |
| work_keys_str_mv | AT pengyang physicalpropertieschemicalstructureandmicrostructureofthermoplasticpolyurethanerecycledmaterialmodifiedasphalt AT peiliangcong physicalpropertieschemicalstructureandmicrostructureofthermoplasticpolyurethanerecycledmaterialmodifiedasphalt AT hongjiehao physicalpropertieschemicalstructureandmicrostructureofthermoplasticpolyurethanerecycledmaterialmodifiedasphalt AT pengfeixiong physicalpropertieschemicalstructureandmicrostructureofthermoplasticpolyurethanerecycledmaterialmodifiedasphalt |