METHOD AND PLANT FOR THE PRODUCTION OF HOT ASPHALT MIXES WITH RECLAIMED ASPHALT MIX MATERIAL

摘要

The invention relates to a method and plant for the production of hot asphalt mixes with reclaimed asphalt material (MRMB), in which up to 100% recycled material can be used. The method comprises the following steps: a) providing an MRMB with a grain-size distribution of between 0 and a maximum diameter; b) treating the MRMB in order to obtain at least two fractions of MRMB (one fine and another coarse); c) subjecting given quantities of said fractions of MRMB to a process involving mixing and heating with hot gas flows, such that the heating times of each fraction are adapted to the grain-size distribution thereof and such that the temperature of the mixture at the end of the step is between 90°C and 120°C; d) kneading the mixture obtained during the previous step with a given quantity of bitumen emulsion supplied at a temperature of between 60°C and 80°C. The end mix after step (d) reaches a temperature between 90 and 110°C. The invention also comprises a plant for carrying out said method.