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Capacidad de curación de múltiples daños del betún modificado con plásticos de desecho basada en propiedades
Mingxia Li1,2, Yiming Fang1, Lingjun Liu1
1School of Intelligent Construction and Civil Engineering, Luoyang Institute of Science and Technology, Luoyang 471023, China.
Materials (Basel, Switzerland)
|August 28, 2025
Resumen
Los residuos plásticos como el PS y el PVC mejoran el betún
Área de la Ciencia:
- Ciencias de los materiales
- Ingeniería civil
- Ciencia de los Polímeros
Sus antecedentes:
- El betún es un componente clave en la construcción de carreteras.
- Los residuos plásticos presentan un importante desafío medioambiental.
- El reciclaje de residuos plásticos en materiales para pavimentos ofrece una solución sostenible.
Objetivo del estudio:
- Investigar el impacto de cinco residuos plásticos (PET, HDPE, PP, PS, PVC) en las propiedades de autocuración del betún.
- Evaluar el efecto curativo de daños múltiples en residuos de betún modificado por plástico.
- Determinar las dosis óptimas para mejorar la utilidad del betún en aplicaciones de pavimento.
Principales métodos:
- Se utilizaron pruebas de reología de corte dinámico (DSR).
- Se llevaron a cabo múltiples pruebas de carga repetidas con ciclos de fatiga-recuperación-fatiga.
- El análisis se centró en el módulo de corte complejo, el ángulo de fase y el factor de fatiga.
Principales resultados:
- El polistireno (PS) y el cloruro de polivinilo (PVC) modificados bitumen exhibieron un rendimiento de recuperación superior.
- PS demostró la mejoría más significativa en la curación de daños después de daños múltiples.
- Se identificaron las dosis óptimas: 2% para PET, HDPE, PP; 6% para PS; 4% para PVC.
Conclusiones:
- La modificación de los residuos plásticos, en particular con PS y PVC, puede mejorar significativamente la capacidad de autocuración del betún.
- Se recomiendan dosis óptimas específicas para diferentes plásticos de desecho para maximizar el índice de cicatrización.
- Los hallazgos apoyan la aplicación práctica de los residuos de betún modificado por plástico en pavimentos.
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