Recycling End-of-Life Tyres as Finishing Products

The growing need of a circular economy within the construction industry has led to the development of several research works focused on the reuse of waste materials. This study investigates the incorporation of end-of-life tyres (ELTs) as a re-cycled component in cementitious mixtures for nonstructural applications. The experimental work focused on evaluating the mechanical performance of innovative mixtures with varying rubber content, particularly in terms of flexural and compressive strength. The research is part of a larger international project between the Universidad Politecnica of Madrid and the Federico II University of Naples, which analyses the recycling potential of different materials and extends this knowledge by exploring different replacement rates and material behaviour over time. The results indicate that while the inclusion of ELT rubber reduces compressive and flexural strength compared to traditional cement mixtures, it provides enhanced elasticity, impact resistance, and adaptability to ground deformations. These properties make it particularly suitable for sustainable urban pavements, playgrounds, and other nonstructural applications requiring high durability and shock absorption. However, mixtures with rubber replacement rates exceeding 65% exhibit significant strength reductions, highlighting the need to optimise material formulations. Future research directions include evaluating the adhesion properties, fire reaction, thermal and acoustic performance, and the potential combination of ELT rubber with other recycled materials. This work contributes to the broader goal of sustainable construction by diverting ELTs from landfills and reducing the environmental impact of building materials.