Estabilidad y flujo de mezclas asfálticas en caliente de gradación intermedia fabricadas con pet y escorias negras de horno de arco eléctrico (eaf).

Abstract

Taking into account that, at the time of manufacturing an asphalt mix, high amounts of non-renewable stone materials are implemented, causing irreparable changes to the environment, especially in air quality, due to this, it is proposed to carry out one or several alternatives. that can replace some of the conventional materials in asphalt mixes, implementing materials such as plastic waste also defined as Polyethylene Terephthalate (PET) and black slag from the electric arc furnace (EAF), with the premise that these are wasted in a large proportion by industries at a national and international level and can be reused for environmental benefits. Based on the above, this project has 3 phases defined as: First phase focused on the characterization of the aggregates, carrying out the laboratory tests that they require according to the INVIAS 2022 road construction specifications; Second phase focused on the elaboration of the design of the conventional asphalt mix, thus having the realization of 4 briquettes for each percentage of asphalt (4, 4.5, 5, 5.5 and 6%), allowing to determine the optimal percentage for the modified asphalt mix design. ; Third phase focused on the development of the design of the modified asphalt mix, with the previous determination of the optimal percentage of asphalt, this phase had 5 designed methods which generate variation in the substitution of the percentage of Polyethylene Terephthalate (PET) in the asphalt cement and black slag from the electric arc furnace (EAF) in the substitution of granular materials, with the purpose of determining the optimal dosage from the mechanical perspective of the stability and flow of hot mixtures of intermediate gradation modified with recycled materials Polyethylene terephthalate (PET) and black slag from electric arc furnace (EAF). The Marshall methodology will be implemented to assess the performance of a conventional MDC-19 type asphalt mix by comparing it with the modified mix. The characterization of the coarse and fine aggregates of the hot dense asphalt mix was presented, evaluating each one of the requirements of the aggregates standardized by the National Institute of Roads (INVIAS). After carrying out the characterization, a series of briquettes (40 briquettes) were prepared to determine the flow (mm) and stability (kN) of the optimal mixture of the design implemented by the Marshall equipment.