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Abstract

In the process of modifying asphalt with Budun rock asphalt, in order to improve the utilization rate of Budun rock asphalt and enhance the performance of modified asphalt, this paper proposed the “activation” treatment of Budun rock asphalt, that is, the process of grinding and heating rock asphalt to make natural asphalt precipitate. Laboratory tests have found that compared with the modified asphalt without the “activation” treatment, the rock asphalt-modified asphalt after “activation” has a decreased penetration, an increased softening point, and improved ductility at 5 °C and kinematic viscosity at 135 °C. Moreover, the trend becomes more and more obvious with the increase in the dosage. When the content of Budun rock asphalt after “activation” is over 30%, the performance of the modified asphalt can reach the level of polymer modified asphalt. In order to further clarify the influence of the “activation” process on the performance of rock asphalt-modified asphalt at the microscopic level, atomic force microscopy is used for microscopic performance tests. The results show that the DMT modulus of rock asphalt-modified asphalt after “activation” is approximately 2.5 times that of the matrix asphalt, indicating that the viscosity of rock asphalt-modified asphalt after “activation” has significantly increased, and the modification effect is remarkable.

Publication Date

6-18-2022

DOI

10.14048/j.issn.1671-2579.2022.03.038

First Page

215

Last Page

218

Submission Date

May 2025

Reference

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