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Abstract

Traditional cold asphalt mixtures present challenges such as inapplicability in humid environments and poor durability when used for repairing potholes in asphalt pavements. To address these issues, with polyurethane prepolymer (PUA), 70# base asphalt, and additives as raw materials, a cold patch asphalt base liquid with optimal comprehensive performance was developed using the simplex design and the ideal point method. Cold patching asphalt mixtures were also prepared, with pavement performance systematically evaluated. It indicates that the PUA content has the greatest influence on the low-temperature performance and tensile strength of the cold patching asphalt liquid. The effects of components on workability and volatility follow the order: diluent > asphalt > PUA. The prepared liquid also exhibits excellent storage stability and adhesion. Furthermore, the PUA-modified cold patch materials demonstrate good strength, high-temperature stability, low-temperature crack resistance, moisture resistance, and fatigue resistance. These findings facilitate the application of polyurethane prepolymer-modified cold patch asphalt in rapid repair projects for asphalt pavement distress.

Publication Date

10-27-2025

DOI

10.14048/j.issn.1671-2579.2025.05.025

First Page

232

Last Page

241

Submission Date

November 2025

Reference

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