Design of Asphalt Mixtures Modified with Recycled Materials and Their Influence on the Performance of Flexible Pavements

Deivy Honorio Carrera R.; Omar Bacón Muñoz K.; Alejandra Velásquez Huayta F. · Proceedings of the LACCEI international Multi-conference for Engineering, Education and Technology (2026) · DOI: 10.18687/laccei2026.1.1.1071

Resumen

This research evaluated the incorporation of recycled materials such as end-of-life tire rubber, shoe soles, and PET plastic into asphalt mixtures, with the aim of analyzing their influence on the mechanical and volumetric performance of flexible pavements in the Cajamarca region. An experimental program was developed using the Marshall method, considering a conventional mixture and three modified mixtures with a 20% partial substitution of mineral aggregates, defined according to the granulometric characteristics of each recycled material. Forty-eight Marshall briquettes were prepared, evaluating four asphalt binder contents (4.5%, 5.0%, 5.5%, and 6.0%) with three specimens per experimental condition. The mixtures were analyzed for stability, flow, density, and volumetric parameters. The results showed that the incorporation of recycled materials reduces density and stability and increases the ductility of the mixture. Among the alternatives evaluated, the mixture modified with recycled rubber exhibited the most balanced behavior in terms of stability, deformation, and volumetric properties. It is concluded that recycled materials can be technically incorporated into asphalt mixtures, provided that the binder dosage and mixture proportions are properly controlled, thus contributing to more sustainable paving.

Instituciones: Universidad Privada del Norte