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Abstract

To study the effect of desulfurized rubber asphalt modifiers on asphalt performance and verify the adaptability, this paper adopted a twin-screw method to prepare desulfurized rubber asphalt modifiers for modifying asphalt A, B, and C. Meanwhile, the changes in the three major indicators, segregation degree, elastic recovery, and viscosity of different modified asphalt were analyzed, with the mixing content optimized to analyze the high-temperature rheological properties of different modified asphalt. The results show that under the reasonable mixing content, desulfurized rubber asphalt modifiers can improve the high and low-temperature performance of asphalt, and equip asphalt with sound elastic recovery performance. Additionally, desulfurized rubber modified asphalt features improved storage stability, reduced viscosity, and sound working performance. The desulfurized rubber asphalt modifier exerts a good effect on the modification of asphalt A, and the optimal mixing content of modifiers is the highest at 20%. The desulfurized rubber asphalt modifier increases the complex modulus of asphalt G∗ and the rutting factor G∗/sinδ, reduces the phase angle δ, and improves the high-temperature deformation resistance of asphalt. It has sound adaptability to the original asphalt.

Publication Date

11-8-2022

DOI

10.14048/j.issn.1671-2579.2022.05.028

First Page

156

Last Page

160

Submission Date

April 2025

Reference

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