Evaluación de desempeño dinámico de una mezcla densa en caliente más de veinte años de uso con la aplicación de un rejuvenecedor asfáltico

This article presents the changes that an asphalt mixture experiences and the extracted asphalt from this folder, taken from one of the streets of Bogotá when adding an asphalt rejuvenator. The samples of extracted asphalt with and without rejuvenator were tested by physical, rheological, chemical and calorimetric tests. To the extracted asphalt folder with and without rejuvenator, tests were carried out of dynamic performance, rutting, trapezoidal fatigue and dynamic module were carried out. With the use of an asphalt rejuvenator it was possible to increase the ductility by 551% compared to aged asphalt, decreasing the rigidity of both the asphalt and the asphalt mixture that had been generated by short and long-term aging. To corroborate this information, chemical tests of Fourier transform infrared spectrometry and differential scanning calorimetry were carried out, which indicated a decrease of 13.08% in the percentage of asphaltenes on the samples in which the asphalt rejuvenator was used.