Caracterización física de un ligante asfáltico 60/70 modificado con GCR y Nanoarcilla

Abstract

Through this research work, the respective physical characterization of a 60/70 penetration asphalt binder modified with recycled rubber grain (GCR) and nanoclay is established, materials obtained through different companies related to this context and that allowed the development of the different samples, analyzed in the laboratory by means of different tests such as the penetration test of bituminous materials, density of solid and semi-solid bituminous materials (pycnometer method), flash points and combustion by means of a Cleveland open cup and the test of point of softening of bituminous materials (ring and ball apparatus), by means of which it is possible to determine the performance, behavior of asphalt and therefore its structural viability during its service stage. The distribution of the materials at the time of composing each sample was determined according to their properties, so taking into account the nanoclay, in one of them 2% was used while in the other 3% of the same material was evaluated, defining for both cases a base made up of 60/70 asphalt binder and 10% GCR. With the development of the research study it was possible to determine that the incorporation of the nanoclay in 3% to a 60/70 asphalt binder modified with 10% GCR presents optimal physical characteristics, indicating that this material provides a component of viscosity, rigidity and resistance at high temperatures, in comparison with the conventional asphalt binder, generating better responses to possible applications to prevent future defects to send in the pavement structures, however, it is important to highlight that a study of the mechanical characteristics must be made in order to determine how effective and functional the application of these modifiers can be to future asphalt mixes. On the other hand, it should be noted that the results produced by the laboratory tests comply with the requirements established in the general specifications for road construction and test standards for road materials of INVIAS.