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Abstract

In order to study the effect of ultraviolet aging on the pavement performance of SBS-modified rubber powder (MCR) composite modified asphalt, an improved ultraviolet aging test chamber was used to simulate the ultraviolet radiation effect of asphalt cement in the actual road use process, and the influence of ultraviolet aging on the conventional indexes of asphalt was analyzed by conventional test methods. DSR and BBR tests were used to analyze the high temperature, low temperature, and fatigue rheological properties of asphalt samples after ultraviolet aging. The results show that with the increase in ultraviolet aging time, the penetration at 25 °C and ductility indexes at 5 °C of SBS-MCR composite modified asphalt decrease significantly; the dynamic viscosity at 60 °C increases significantly, and the softening point shows obvious two-stage aging characteristics. The rutting factor G*/sinδ of SBS-MCR composite modified asphalt is obviously increased after long-term ultraviolet aging, but the deformation recovery ability is decreased under high temperature conditions. Ultraviolet aging can increase the bending stiffness modulus S and reduce the creep recovery rate m, and the low temperature rheology of asphalt can be reduced as a whole. In addition, ultraviolet aging has an adverse effect on the fatigue rheological properties of asphalt.

Publication Date

1-18-2024

DOI

10.14048/j.issn.1671-2579.2022.06.045

First Page

236

Last Page

240

Submission Date

May 2025

Reference

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