Modification of bitumen with polyether-based polyurethanes containing different hard segments
To expand the application of polyurethane (PU) modified bitumen, it is necessary to understand the influence of PU raw materials on PU modified bitumen systematically. Three polyether-based polyurethanes were used to modify the unmodified bitumen, synthesised from toluene diisocyanate (TDI), dipheny...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2025-04-01
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| Series: | Journal of Traffic and Transportation Engineering (English ed. Online) |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2095756425000510 |
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| author | Zengping Zhang Hao Liu Youxin Zhu Liqi Chen Jia Sun Li Wang Ting Huang |
| author_facet | Zengping Zhang Hao Liu Youxin Zhu Liqi Chen Jia Sun Li Wang Ting Huang |
| author_sort | Zengping Zhang |
| collection | DOAJ |
| description | To expand the application of polyurethane (PU) modified bitumen, it is necessary to understand the influence of PU raw materials on PU modified bitumen systematically. Three polyether-based polyurethanes were used to modify the unmodified bitumen, synthesised from toluene diisocyanate (TDI), diphenylmethane diisocyanate (MDI), and polyaryl polyisocyanate (PAPI) by reaction with polytetrahydrofuran diol (PTMEG) respectively. And the performance of polyether-based PU modified bitumen was investigated at various contents of isocyanates. Firstly, the modification mechanism of PU modified bitumen binders was analysed by Fourier transform infrared spectroscopy (FTIR). Then, the high and low temperature properties and resistance to permanent deformation of modified bitumen binders were investigated through dynamic shear rheometer (DSR) test, bending beam rheometer (BBR) test and multiple stress creep recovery (MSCR) test. Finally, the microstructure and molecular movement were analyzed by fluorescence microscopy (FM), atomic force microscopy (AFM) and differential scanning calorimetry (DSC). As the results show, there are significant differences in the molecular structure, cross-linking and hydrogen bonding of polyurethane modifiers synthesised from different isocyanates, which then affect the interaction between polyurethane molecules and bitumen molecules and result in different modification effects on bitumen. Concerning high-temperature properties and storage stability, PU synthesised by PAPI is the best solution for improving bitumen. PU synthesised by TDI offers the best improvement in low temperature performance. It is worth noting that the PU synthesised by MDI provides a more balanced improvement in high and low temperature performances. This study provides guidance for the development of PU modified bitumen. |
| format | Article |
| id | doaj-art-d5799b95a2764aa99bb31bfa4c5a4878 |
| institution | DOAJ |
| issn | 2095-7564 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Journal of Traffic and Transportation Engineering (English ed. Online) |
| spelling | doaj-art-d5799b95a2764aa99bb31bfa4c5a48782025-08-20T02:55:52ZengKeAi Communications Co., Ltd.Journal of Traffic and Transportation Engineering (English ed. Online)2095-75642025-04-0112234436010.1016/j.jtte.2023.01.006Modification of bitumen with polyether-based polyurethanes containing different hard segmentsZengping Zhang0Hao Liu1Youxin Zhu2Liqi Chen3Jia Sun4Li Wang5Ting Huang6Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang'an University, Xi'an 710064, China; Corresponding author.Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang'an University, Xi'an 710064, China; Corresponding author.Zhaotong Duxiang Expressway Investment and Development Co., Ltd., Zhaotong 657000, ChinaKey Laboratory for Special Area Highway Engineering of Ministry of Education, Chang'an University, Xi'an 710064, ChinaSchool of Transportation, Southeast University, Nanjing 210096, ChinaKey Laboratory for Special Area Highway Engineering of Ministry of Education, Chang'an University, Xi'an 710064, ChinaKey Laboratory for Special Area Highway Engineering of Ministry of Education, Chang'an University, Xi'an 710064, ChinaTo expand the application of polyurethane (PU) modified bitumen, it is necessary to understand the influence of PU raw materials on PU modified bitumen systematically. Three polyether-based polyurethanes were used to modify the unmodified bitumen, synthesised from toluene diisocyanate (TDI), diphenylmethane diisocyanate (MDI), and polyaryl polyisocyanate (PAPI) by reaction with polytetrahydrofuran diol (PTMEG) respectively. And the performance of polyether-based PU modified bitumen was investigated at various contents of isocyanates. Firstly, the modification mechanism of PU modified bitumen binders was analysed by Fourier transform infrared spectroscopy (FTIR). Then, the high and low temperature properties and resistance to permanent deformation of modified bitumen binders were investigated through dynamic shear rheometer (DSR) test, bending beam rheometer (BBR) test and multiple stress creep recovery (MSCR) test. Finally, the microstructure and molecular movement were analyzed by fluorescence microscopy (FM), atomic force microscopy (AFM) and differential scanning calorimetry (DSC). As the results show, there are significant differences in the molecular structure, cross-linking and hydrogen bonding of polyurethane modifiers synthesised from different isocyanates, which then affect the interaction between polyurethane molecules and bitumen molecules and result in different modification effects on bitumen. Concerning high-temperature properties and storage stability, PU synthesised by PAPI is the best solution for improving bitumen. PU synthesised by TDI offers the best improvement in low temperature performance. It is worth noting that the PU synthesised by MDI provides a more balanced improvement in high and low temperature performances. This study provides guidance for the development of PU modified bitumen.http://www.sciencedirect.com/science/article/pii/S2095756425000510PolyurethaneModification mechanismRheological propertiesBitumenMolecular movement |
| spellingShingle | Zengping Zhang Hao Liu Youxin Zhu Liqi Chen Jia Sun Li Wang Ting Huang Modification of bitumen with polyether-based polyurethanes containing different hard segments Journal of Traffic and Transportation Engineering (English ed. Online) Polyurethane Modification mechanism Rheological properties Bitumen Molecular movement |
| title | Modification of bitumen with polyether-based polyurethanes containing different hard segments |
| title_full | Modification of bitumen with polyether-based polyurethanes containing different hard segments |
| title_fullStr | Modification of bitumen with polyether-based polyurethanes containing different hard segments |
| title_full_unstemmed | Modification of bitumen with polyether-based polyurethanes containing different hard segments |
| title_short | Modification of bitumen with polyether-based polyurethanes containing different hard segments |
| title_sort | modification of bitumen with polyether based polyurethanes containing different hard segments |
| topic | Polyurethane Modification mechanism Rheological properties Bitumen Molecular movement |
| url | http://www.sciencedirect.com/science/article/pii/S2095756425000510 |
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