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Propiedades Físicas, Reológicas y Microestructurales del Asfalto Modificado con Poliolefina de Bajo Peso Molecular
Jun He1, Binbin Leng2, Meizhu Chen3
1State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China.
Materials (Basel, Switzerland)
|February 13, 2026
Resumen
Un novedoso modificador de poliolefina elástica (POL) mejora significativamente el asfalto
Área de la Ciencia:
- Ciencia de Materiales; Ingeniería Civil; Química de Polímeros
Sus antecedentes:
- El rendimiento de los pavimentos de asfalto está limitado por desequilibrios de temperatura.
- Es crucial desarrollar modificadores que equilibren las propiedades de alta y baja temperatura.
Objetivo del estudio:
- Investigar los efectos de la poliolefina elástica (POL) como modificador del asfalto.
- Determinar la dosis óptima de POL para un rendimiento equilibrado del pavimento.
Principales métodos:
- Reómetro de Cizalla Dinámica (DSR) y Reómetro de Viga de Flexión (BBR) para análisis reológico.
- Espectroscopía infrarroja por transformada de Fourier (FT-IR) y microscopía de fluorescencia (FM) para la caracterización de materiales.
Principales resultados:
- El POL mejoró el rendimiento a altas temperaturas (el factor de deformación aumentó 2-8 veces) y la trabajabilidad.
- La estabilidad térmica aumentó, con un desplazamiento hacia arriba de la temperatura de descomposición.
- Se observó una compatibilidad y dispersión óptimas a una dosis de POL del 6%, lo que evitó la segregación de fases.
Conclusiones:
- Se recomienda una dosis de POL del 6% para un rendimiento equilibrado del asfalto.
- La modificación con POL ofrece una estrategia viable para materiales de asfalto térmicamente estables.
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