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Abstract

The cast asphalt mixture is the most widely applied pavement material for large-span steel bridge decks in China, and its asphalt binder mainly employs polymer composite modified asphalt. This paper selected four types of polymer composite modified asphalt to study the flowability, high-temperature performance, low-temperature performance, and fatigue performance of their mixture GA10, and at the same time compared them with lake asphalt composite modified asphalt and its mixture GA10. The results show that the low-temperature performance and fatigue performance of polymer composite modified asphalt GA10 are significantly better than those of lake asphalt composite modified asphalt GA10. The road performance of the cast asphalt mixture is closely related to the performance of the asphalt binder. Polymer composite modified asphalt with the high high-temperature viscosity and softening point has better high-temperature stability in its mixture GA10, while polymer composite modified asphalt with the high low-temperature ductility and elastic recovery rate has better low-temperature cracking resistance and fatigue performance in its mixture GA10. According to the physical engineering requirements, suitable polymer composite modified asphalt should be selected.

Publication Date

11-8-2022

DOI

10.14048/j.issn.1671-2579.2022.05.030

First Page

167

Last Page

171

Submission Date

April 2025

Reference

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