Abstract
End-of-life tires are waste materials that pollute landscapes when they are disposed of in tire dumps. However, its life cycle is not
finished when they are scrapped. The rubber of end-of-life tires could be used for new purposes as construction material in road
rehabilitation. A gap-graded mix characterization was carried out in this work by means of laboratory and field performance
tests. The mixture has a high content of crumb rubber (CR) by weight of bitumen. Crumb Rubber was added to the binder by a
wet process. Close proximity methodology has been used in in-situ characterization of the acoustic behaviour. Moreover,
absorption and dynamic stiffness tests were also conducted to determine the noise generation mechanisms involved in noise.
According to the results achieved, a reduction of the noise emitted by the tire/pavement interaction could be accomplished with
the construction of roads with mixture with CR added by a wet process. In addition, this would result in a decrease of the amount
of waste tires in landfills.