Estudio comparativo del comportamiento de mezcla asfáltica tibia con diversos porcentajes de material reciclado PET, caucho triturado y escoria como sustitutos de agregados

Abstract

Abstract: This study analyzes the technical and environmental feasibility of warm mix asphalt mixtures prepared with the partial substitution of traditional aggregates with recycled materials such as PET, shredded rubber, and steelmaking slag, applying the Marshall methodology. Parameters such as stability, flow, bulk density, voids in the mineral aggregate (VMA), and voids filled with asphalt (VFA) were evaluated, complying with ASTM, AASHTO, and INEN standards for asphalt mixtures. The results indicate that PET increases flexibility but affects internal cohesion. Rubber in the mixture improves elasticity and resistance to thermal cracking, but shows variations in VFA. Substitution with slag increases stability and rigidity, but at high percentages hinders workability. On the other hand, the incorporation of the ASFALPLUS additive allowed for optimization of the viscosity and cohesion of the mixtures at manufacturing temperatures between 120°C and 130°C. This study encourages the use of recycled materials in paving, promotes sustainability and a circular economy, and offers an alternative for reducing environmental impact by lowering the mixing temperature.