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A platform for research: civil engineering, architecture and urbanism
The property evaluation of recycled asphalt binder composed of an epoxy resin polymer and aged asphalt binder
https://orcid.org/0000-0001-8407-8427
Graphical abstract Display Omitted
Highlights EP improved the low-temperature and fatigue properties of aged asphalt binder. The fatigue properties of ERA binder steadily improved as the EP content increased. After a phase transition occurred, the properties of the binder significantly changed. EP changed the concentration of functional groups in aged asphalt binder. The property gap between EA and ERA was not significant under the same EP content.
Abstract The reutilization of reclaimed asphalt pavement (RAP) is gaining importance in meeting the objectives of green and sustainable environmental policies. Meanwhile, epoxy asphalt (EA) is not widely used due to its high price. To facilitate the utilization of EA in RAP recycling, this study adopted an epoxy polymer (EP) to prepare the recycled asphalt binder and investigate the effects of different EP content on the properties of aged asphalt binder. Evaluation encompassed mechanical, microstructural, and chemical characteristics of EP-recycled asphalt (ERA) binders, which were compared against virgin EA binders. The addition of EP can significantly enhance the tensile strength, high-temperature properties, low-temperature properties, and fatigue resistance of the aged asphalt binder. However, the elongation of the aged asphalt binder became worse. As the EP content increased from 30% to 50%, the tensile strength, high-temperature properties, fatigue resistance, and construction allowance time of ERA consistently improved, while the elongation of ERA steadily decreased. A phase transition occurred between asphalt binder and EP phase as EP increased from 40% to 50%, resulting in a rapid increase in tensile strength, high-temperature properties, and fatigue resistance of ERA, as well as a significant reduction in elongation and low-temperature properties of ERA. The concentration of sulfoxide decreased as the EP content increased. The performance gap between EA and ERA was not significant under the same EP content. The EP content had a greater impact than the aging degree of asphalt binder on the properties of the ERA. A recommended EP content of 40% was suggested.
The property evaluation of recycled asphalt binder composed of an epoxy resin polymer and aged asphalt binder
https://orcid.org/0000-0001-8407-8427
Graphical abstract Display Omitted
Highlights EP improved the low-temperature and fatigue properties of aged asphalt binder. The fatigue properties of ERA binder steadily improved as the EP content increased. After a phase transition occurred, the properties of the binder significantly changed. EP changed the concentration of functional groups in aged asphalt binder. The property gap between EA and ERA was not significant under the same EP content.
Abstract The reutilization of reclaimed asphalt pavement (RAP) is gaining importance in meeting the objectives of green and sustainable environmental policies. Meanwhile, epoxy asphalt (EA) is not widely used due to its high price. To facilitate the utilization of EA in RAP recycling, this study adopted an epoxy polymer (EP) to prepare the recycled asphalt binder and investigate the effects of different EP content on the properties of aged asphalt binder. Evaluation encompassed mechanical, microstructural, and chemical characteristics of EP-recycled asphalt (ERA) binders, which were compared against virgin EA binders. The addition of EP can significantly enhance the tensile strength, high-temperature properties, low-temperature properties, and fatigue resistance of the aged asphalt binder. However, the elongation of the aged asphalt binder became worse. As the EP content increased from 30% to 50%, the tensile strength, high-temperature properties, fatigue resistance, and construction allowance time of ERA consistently improved, while the elongation of ERA steadily decreased. A phase transition occurred between asphalt binder and EP phase as EP increased from 40% to 50%, resulting in a rapid increase in tensile strength, high-temperature properties, and fatigue resistance of ERA, as well as a significant reduction in elongation and low-temperature properties of ERA. The concentration of sulfoxide decreased as the EP content increased. The performance gap between EA and ERA was not significant under the same EP content. The EP content had a greater impact than the aging degree of asphalt binder on the properties of the ERA. A recommended EP content of 40% was suggested.
The property evaluation of recycled asphalt binder composed of an epoxy resin polymer and aged asphalt binder
https://orcid.org/0000-0001-8407-8427
Graphical abstract Display Omitted
Highlights EP improved the low-temperature and fatigue properties of aged asphalt binder. The fatigue properties of ERA binder steadily improved as the EP content increased. After a phase transition occurred, the properties of the binder significantly changed. EP changed the concentration of functional groups in aged asphalt binder. The property gap between EA and ERA was not significant under the same EP content.
Abstract The reutilization of reclaimed asphalt pavement (RAP) is gaining importance in meeting the objectives of green and sustainable environmental policies. Meanwhile, epoxy asphalt (EA) is not widely used due to its high price. To facilitate the utilization of EA in RAP recycling, this study adopted an epoxy polymer (EP) to prepare the recycled asphalt binder and investigate the effects of different EP content on the properties of aged asphalt binder. Evaluation encompassed mechanical, microstructural, and chemical characteristics of EP-recycled asphalt (ERA) binders, which were compared against virgin EA binders. The addition of EP can significantly enhance the tensile strength, high-temperature properties, low-temperature properties, and fatigue resistance of the aged asphalt binder. However, the elongation of the aged asphalt binder became worse. As the EP content increased from 30% to 50%, the tensile strength, high-temperature properties, fatigue resistance, and construction allowance time of ERA consistently improved, while the elongation of ERA steadily decreased. A phase transition occurred between asphalt binder and EP phase as EP increased from 40% to 50%, resulting in a rapid increase in tensile strength, high-temperature properties, and fatigue resistance of ERA, as well as a significant reduction in elongation and low-temperature properties of ERA. The concentration of sulfoxide decreased as the EP content increased. The performance gap between EA and ERA was not significant under the same EP content. The EP content had a greater impact than the aging degree of asphalt binder on the properties of the ERA. A recommended EP content of 40% was suggested.
The property evaluation of recycled asphalt binder composed of an epoxy resin polymer and aged asphalt binder
Yi, Xingyu (author) / Chen, Huimin (author) / Wong, Yiik Diew (author) / Yang, Jun (author) / Huang, Wei (author)
2023-10-09
Article (Journal)
Electronic Resource
English
Influence of epoxy resin polymer on recycled asphalt binder properties
| Elsevier | 2023
Influence of epoxy resin polymer on recycled asphalt binder properties
| Elsevier | 2023