Caracterización física de un ligante asfaltico 60/70 modificado con desechos de polietileno de alta densidad (D-PEAD)

Abstract

Globally, Colombia is one of the countries with the greatest delay in the development of its road infrastructure, it obtained a rating of 47.8 out of 100 in the road connectivity index calculated by the World Economic Forum, that is, 140 countries measured, the nation It occupies box 97. This is mainly due to the lack of resources, the deficiency of construction materials, the continuous increase of legal load limits and the lack of support from the road administration for research and technological development. In the world, several investigations have been carried out on polymer modified asphalts, which consist of modifying conventional asphalts by adding industrial polymers and / or polymers as a product of non-biodegradable waste, improving asphalt behavior at high and low levels. temperatures and It is clear that by incorporating non-biodegradable waste materials in asphalt materials used in flexible pavements, a positive impact on the environment is generated, since it would stop producing waste that generates serious effects, giving it a handle and reuse. Consequently, this research work focused on evaluating the physical characteristics of a modified 60/70 asphalt with high density polyethylene residues, performing laboratory tests with different doses that allow us to measure the performance of the modified asphalt and its behavior in relationship with the cyclic loads produced by vehicular traffic, which are relevant to the pavement structure from design to fulfillment of its service level; and that also contributes to the mitigation of the environmental impact. The results obtained in this investigation indicate that the modified asphalt with more than 8% of high density polyethylene residues decreases the penetration of the material, which generates the appearance of stiffer asphalts, with less manageability and consistency. It was also observed that the softening point of this material is much higher than that of conventional asphalt. The modification made to the asphalt with 6% of D-HDPE is less rigid than the conventional asphalt, however, its softening point is greater than that registered by the asphalt 60/70, so it can be said that this material is less viscous as the temperature rises. which could improve the behavior of cyclic loads and increase the life of the pavement.