September 10, 2025CoatingsOpen Access

Mechanical Properties and Modification Mechanism of Thermosetting Polyurethane-Modified Asphalt

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Polyurethane-modified asphalt achieved significant gains in tensile strength, increasing by 509% with 50% PU dosage.
The optimum workability was found at a polyurethane dosage of 50%, with rotational viscosity measured at 1005 cp.
Dynamic mechanical analysis demonstrated improved flexibility in polyurethane-modified asphalt at higher temperatures.
Differential scanning calorimetry and scanning electron microscopy indicated a well-integrated structure at higher PU doses.

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Analysis reveals mechanical properties and workability of polymer-modified asphalt, highlighting viscosity and elasticity improvements.

Zhuang et al. (2025) studied this question.

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