Caracterizacion de una muestra de pavimento asfáltico reciclado (RAP) extraido de la Autopista Sur a la altura de los municipios de Soacha y Sibaté Cundinamarca con el fin de determinar su uso como capa granular no tratada en una estructura de pavimento.

Abstract

Due to the high demand for the exploitation of stone resources that has been carried out in recent years, it is of great interest to both engineers and government entities, the implementation of processes that involve the use of non-renewable resources, in order to reduce production costs and also preserve the environment. Recycled asphalt pavement, or for its acronym in English (RAP), is the term that is given to the granular product that is obtained, when the asphalt layer and part of the base of a deteriorated pavement structure are removed by milling. . This material is intended for the construction of new asphalt pavers or for the maintenance of the road heritage of a region, since it is a material that still retains appropriate mechanical qualities, which are capable of totally or partially replacing the structural contribution of the virgin material.

It was experimentally demonstrated that the RAP extracted conforms to the minimum requirements that the INVIAS 2013 stipulates, to be used as a granular sub-base or affirmed for high, moderate and low traffic volumes, however, for granular bases it is not adjusted by the deficit in the percentage of CBR. Likewise, it was determined that the particle size of the studied material presented a gradation that did not fit within the minimum and maximum limits for bases, sub bases and affirmed, for which it was necessary to accommodate the curve, manipulating the retained percentages. Through a basic budgeting exercise, it was determined that building 100 linear meters of a typical pavement structure with recycled materials may in some cases be more economical than building with virgin materials.