The work is focused on the development of properties of asphalt binder extracted from an asphalt mixture with RAP, which monitors the difference between properties of the binder during laying and then after a period of 6 months after laying of asphalt. In the theoretical part are simply described the various ways of recycling of a flexible pavement, asphalt mix production with the addition of 25% R-cold material and methods of individual tests to determine the properties of the asphalt binder. The practical part deals with the comparison of the results of asphalt binder properties described in the theoretical part is evaluated and the overall aging of the asphalt mix.