Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Thermal oxidative aging mechanism of lignin modified bitumen
Graphical abstract Display Omitted
Highlights Lignin improves the high temperature performance and aging resistance of asphalt. The results of rheological parameters CAI and carbonyl index are in agreement. Combined TG, FTIR and elongated aging to analyze the thermo-oxidative aging mechanism of lignin modified asphalt.
Abstract Lignin is the most abundant renewable resource in nature, which can be applied to not only improve resource utilization but also improve bitumen road performance. In this study, the evolution of lignin during thermal-oxidative aging of bitumen was investigated by dynamic shear rheology test (DSR), thermogravimetric test (TG) and Fourier transform infrared spectroscopy (FTIR). The thermo-oxidative aging mechanism of lignin modified bitumen was analyzed. The results show that lignin-modified bitumen had better aging resistance than the virgin bitumen. Meanwhile, the changes of functional group indices at 1460 cm−1, 1512 cm−1, and 1600 cm−1 in the infrared spectra proved that the thermal-oxidative aging mechanism was the decomposition of lignin itself under the action of thermal oxygen, which inhibited the aging process of bitumen.
Thermal oxidative aging mechanism of lignin modified bitumen
Graphical abstract Display Omitted
Highlights Lignin improves the high temperature performance and aging resistance of asphalt. The results of rheological parameters CAI and carbonyl index are in agreement. Combined TG, FTIR and elongated aging to analyze the thermo-oxidative aging mechanism of lignin modified asphalt.
Abstract Lignin is the most abundant renewable resource in nature, which can be applied to not only improve resource utilization but also improve bitumen road performance. In this study, the evolution of lignin during thermal-oxidative aging of bitumen was investigated by dynamic shear rheology test (DSR), thermogravimetric test (TG) and Fourier transform infrared spectroscopy (FTIR). The thermo-oxidative aging mechanism of lignin modified bitumen was analyzed. The results show that lignin-modified bitumen had better aging resistance than the virgin bitumen. Meanwhile, the changes of functional group indices at 1460 cm−1, 1512 cm−1, and 1600 cm−1 in the infrared spectra proved that the thermal-oxidative aging mechanism was the decomposition of lignin itself under the action of thermal oxygen, which inhibited the aging process of bitumen.
Thermal oxidative aging mechanism of lignin modified bitumen
Su, Yi (Autor:in) / Tang, Shan (Autor:in) / Cai, Meng (Autor:in) / Nie, Yu (Autor:in) / Hu, Bo (Autor:in) / Wu, Shujuan (Autor:in) / Cheng, Cheng (Autor:in)
21.11.2022
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Microstructures and thermal aging mechanism of expanded vermiculite modified bitumen
| Online Contents | 2013
Microstructures and thermal aging mechanism of expanded vermiculite modified bitumen
| British Library Online Contents | 2013
Thermo-oxidative aging of bitumen
| Online Contents | 2016
Thermo-oxidative aging of bitumen
| Taylor & Francis Verlag | 2018