![]() Nano-morphological parameters of bitumen with different ageing degrees were obtained by AFM and analyzed with NanoScope Analysis, and the relationships between nano-morphological parameters and bitumen technical indexes after ageing, such as penetration, ductility, softening point, and viscosity were analyzed. Bitumen with different ageing degrees was prepared by thin film oven test (TFOT). ![]() The calculation method of nano-parameters was also proposed. Area ratio of bee-like structure, roughness, and maximum amplitude were selected as the nano-morphological parameters of the bitumen. Atomic force microscope (AFM) test sample of bitumen was prepared in this paper. The purpose of this paper is to find out the effect of thermal oxygen ageing on the nano-morphology of bitumen. In recent years, the research on bitumen has reached the nanometer level, but there are still some problems in the study of the relationship between the atomic force microscope (AFM) nano-morphology and ageing of bitumen.
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