CHARACTERIZATION OF RUBBERIZED ASPHALT FOR RAILWAYS

Rubberized asphalt mixtures are regarded as a solution for improving the strength of the rail-track section. The recycled rubber has become an enhancer of the modified bituminous mixtures. In this work, it has been shown as a sustainable improvement option in HMA mixes due to the elastic behavior exposed by the rubber particles. The impact of thermal susceptibility on the mechanical properties of the railway bituminous sub-ballast layer has served to the advanced measurement of the thermal cycles inside the rail track. Different simulations following the Kentrack and Kenpave software were employed to be effective with the best mix-design for railways. According to weather situation, reviewed temperature models were used to prove the effectiveness of the railway superstructure. It is included the assessment of improved modified asphalt mixes with coarse rubber from scrap tires, containing 1.5-3% of rubber (sizes 0.2-4mm) by weight of the total mix. Adopting the Volumetric mix-design by the dry process was enhanced the characterization of rubberized materials after computer simulations to evaluate stresses derived from the rail traffic and the average seasonal temperatures. The stiffer-elastic sustainable rubberized mixes showed that is useful in the reduction of rail track damping vibrations.