A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Toughness modification of waterborne epoxy emulsified asphalt by waterborne polyurethane elastomer
https://orcid.org/0000-0002-1586-0017
https://orcid.org/0000-0002-6572-3811
https://orcid.org/0000-0002-8301-5843
Graphical abstract Display Omitted
Highlights The w-PUEA system gradually changes from a brittle to a toughness structure with the increased content of w-PU. The w-PU can significantly improve the fracture toughness without definitely reducing the strength of w-EA. The w-PU has a positive effect on the low temperature performance of w-EA mixture.
Abstract Waterborne epoxy emulsified asphalt (w-EA) is prone to cracking at low temperatures after curing, making it vulnerable to damage in plateau zone. In order to solve poor performance at low-temperature of w-EA, waterborne polyurethane (w-PU) is used as a toughening agent to modify waterborne epoxy emulsified asphalt (w-PUEA). Furthermore, the microstructure, creep resistance, dynamic mechanical properties, low-temperature performance, and tensile mechanical properties of both w-EA and w-PUEA are studied in this paper. As the amount of w-PU is increased, the resin network structure in w-PUEA becomes more complex. In addition, w-PU significantly improves the long-term creep behavior of w-EA. The glass transition temperature of w-PUEA gradually shifts to a higher temperature with increasing amounts of w-PU. It is worth noting that the damping properties of w-EA are also significantly improved. The results from low-temperature stress relaxation tests show that the relaxation rate of 10% w-PUEA (0.27 MPa·s−1) is 1.93 times higher than that of w-EA (0.14 MPa·s−1). The flexible long chain of w-PU improves the elongation at break and toughness of 10% w-PUEA by 300% and 171%, respectively, in comparison with w-EA. The pavement performance of the mixture indicates that the addition of 10 wt% w-PU can significantly enhance the low-temperature crack resistance of w-EA.
Toughness modification of waterborne epoxy emulsified asphalt by waterborne polyurethane elastomer
https://orcid.org/0000-0002-1586-0017
https://orcid.org/0000-0002-6572-3811
https://orcid.org/0000-0002-8301-5843
Graphical abstract Display Omitted
Highlights The w-PUEA system gradually changes from a brittle to a toughness structure with the increased content of w-PU. The w-PU can significantly improve the fracture toughness without definitely reducing the strength of w-EA. The w-PU has a positive effect on the low temperature performance of w-EA mixture.
Abstract Waterborne epoxy emulsified asphalt (w-EA) is prone to cracking at low temperatures after curing, making it vulnerable to damage in plateau zone. In order to solve poor performance at low-temperature of w-EA, waterborne polyurethane (w-PU) is used as a toughening agent to modify waterborne epoxy emulsified asphalt (w-PUEA). Furthermore, the microstructure, creep resistance, dynamic mechanical properties, low-temperature performance, and tensile mechanical properties of both w-EA and w-PUEA are studied in this paper. As the amount of w-PU is increased, the resin network structure in w-PUEA becomes more complex. In addition, w-PU significantly improves the long-term creep behavior of w-EA. The glass transition temperature of w-PUEA gradually shifts to a higher temperature with increasing amounts of w-PU. It is worth noting that the damping properties of w-EA are also significantly improved. The results from low-temperature stress relaxation tests show that the relaxation rate of 10% w-PUEA (0.27 MPa·s−1) is 1.93 times higher than that of w-EA (0.14 MPa·s−1). The flexible long chain of w-PU improves the elongation at break and toughness of 10% w-PUEA by 300% and 171%, respectively, in comparison with w-EA. The pavement performance of the mixture indicates that the addition of 10 wt% w-PU can significantly enhance the low-temperature crack resistance of w-EA.
Toughness modification of waterborne epoxy emulsified asphalt by waterborne polyurethane elastomer
https://orcid.org/0000-0002-1586-0017
https://orcid.org/0000-0002-6572-3811
https://orcid.org/0000-0002-8301-5843
Graphical abstract Display Omitted
Highlights The w-PUEA system gradually changes from a brittle to a toughness structure with the increased content of w-PU. The w-PU can significantly improve the fracture toughness without definitely reducing the strength of w-EA. The w-PU has a positive effect on the low temperature performance of w-EA mixture.
Abstract Waterborne epoxy emulsified asphalt (w-EA) is prone to cracking at low temperatures after curing, making it vulnerable to damage in plateau zone. In order to solve poor performance at low-temperature of w-EA, waterborne polyurethane (w-PU) is used as a toughening agent to modify waterborne epoxy emulsified asphalt (w-PUEA). Furthermore, the microstructure, creep resistance, dynamic mechanical properties, low-temperature performance, and tensile mechanical properties of both w-EA and w-PUEA are studied in this paper. As the amount of w-PU is increased, the resin network structure in w-PUEA becomes more complex. In addition, w-PU significantly improves the long-term creep behavior of w-EA. The glass transition temperature of w-PUEA gradually shifts to a higher temperature with increasing amounts of w-PU. It is worth noting that the damping properties of w-EA are also significantly improved. The results from low-temperature stress relaxation tests show that the relaxation rate of 10% w-PUEA (0.27 MPa·s−1) is 1.93 times higher than that of w-EA (0.14 MPa·s−1). The flexible long chain of w-PU improves the elongation at break and toughness of 10% w-PUEA by 300% and 171%, respectively, in comparison with w-EA. The pavement performance of the mixture indicates that the addition of 10 wt% w-PU can significantly enhance the low-temperature crack resistance of w-EA.
Toughness modification of waterborne epoxy emulsified asphalt by waterborne polyurethane elastomer
Xu, Peijun (author) / Wang, Yadong (author) / Cheng, Pengjie (author) / Cong, Peiliang (author) / Li, Danggang (author) / Zhang, Zeyu (author) / Hui, Jizhuang (author) / Ye, Min (author)
2023-04-24
Article (Journal)
Electronic Resource
English
Waterborne epoxy resin modified emulsified asphalt mixture and preparation method thereof
| European Patent Office | 2020