Study on Microcosmic Characteristics of Gussasphalt after Superheat Aging based on FTIR Technology

2018 International Conference on Construction, Aviation and Environmental Engineering

生态环境科学;生物科学

Ke, Zhong^1 ; Mingzhi, Sun^1 ; Xue, Wang^1

Research Institute of Highway Ministry of Transport, Beijing

100088, China^1

关键词: Absorption peaks;    Aging degree;    Fourier transform infra red (FTIR) spectroscopy;    High temperature aging;    Microscopic mechanisms;    Microscopic points;    Steel deck pavement;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/233/3/032011/pdf
DOI  :  10.1088/1755-1315/233/3/032011

来源: IOP

【 摘 要 】

Gussasphalt concrete has many excellent characteristics, such as good impermeability, strength, elasticity and so on. In recent years, it has been widely used in large and medium bridges, especially in steel deck pavement. But different from ordinary mixture, gussasphalt needs to undergo long period of high temperature aging during mixing and transportation. In order to reveal the microscopic mechanism of superheat aging of gussasphalt, fourier transform infra-red spectroscopy (FTIR) is mainly used in this paper. The changes of functional groups of gussasphalt before and after aging were analyzed from the microscopic point of view. The results show that there is no new absorption peak of lake asphalt when it is added to the matrix asphalt, the asphalt is mainly physically modified by lake asphalt, and the aging degree of gussasphalt can be quantitatively characterized by carbonyl coefficient.