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Abstract

To better evaluate the high-temperature performance of two types of high-viscosity asphalt including thermoplastic elastomers and thermoplastic resins, this paper conducted routine tests such as the penetration, softening point, low-temperature ductility, and visco-temperature curve testing on high-viscosity asphalt with different mixing contents (3%, 5%, 8%), as well as zero shear viscosity (ηZSV) rheological test analysis. Meanwhile, TEM was adopted for mechanism analysis on the two types of high-viscosity asphalt. Specifically, the influence of different experimental frequencies and fitting models on the fitting effect of ηZSV was studied. Finally, the modification effect of high-viscosity modified asphalt was evaluated by employing the results of the ηZSV test. The results show that the frequency range of 0.01-100 Hz is the most suitable for ηZSV testing. When matrix asphalt and elastic high-viscosity asphalt were tested, simplified models can be utilized to replace standard models, while for resin high-viscosity asphalt, it is recommended that the Cross standard model should be employed for fitting. The two types of high-viscosity modified asphalt have sound correlation with the ηZSV, softening point, and ductility, but have poor correlation with penetration.

Publication Date

1-18-2024

DOI

10.14048/j.issn.1671-2579.2023.06.048

First Page

308

Last Page

314

Submission Date

March 2025

Reference

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