Ingeniería Civil y Mecánica

URI permanente para esta comunidadhttp://repositorio.uta.edu.ec/handle/123456789/898

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2023 - 20253

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Tema: search.filters.subject.ASFALTO MODIFICADO

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  • Miniatura
    Item type:Ítem,
    Evaluación de asfalto modificado mediante la incorporación de grano de caucho reciclado (GCR) y asfalto reciclado (RAP)
    (Ingeniería Civil y Mecánica. Carrera Ingeniería Civil, 2025)
    Padilla Núñez Michelle Nicole
    ;
    Bayas Altamirano Myriam Marisol
    Economic development has generated demand for road infrastructure, along with the increase in waste derived from disused tires, leading to an environmental problem that requires sustainable solutions. In this context, this research aims to evaluate the incorporation of Recycled Rubber Granules (RRG) and Recycled Asphalt Pavement (RAP) in asphalt mixtures as an ecologically and technically viable alternative for the design of flexible pavements. The reuse of these materials seeks to reduce resource use, lower production costs, and mitigate the environmental impact associated with road construction. The study includes the production of 45 asphalt briquettes: 9 conventional briquettes and 36 modified briquettes with different dosages of RGR and RAP. The mixtures used asphalt contents in the following percentages: 5.5%, 6.0%, and 6.5%, with four recycled additions of 4% GCR and 7% RAP, 10% GCR and 15% RAP, 15% GCR and 20% RAP, and 20% GCR and 25% RAP. Through volumetric and mechanical characterization tests, the behavior of the mixtures was analyzed with respect to parameters such as stability, flow, voids, and bulk density. The results showed that only the mixtures with 4% GCR and 7% RAP met the minimum requirements established by the MOP-001-F 2002 standard. However, all modified mixtures presented flow values outside the regulatory range, indicating a greater tendency toward plastic deformation. This is mainly attributed to the thermoplastic and absorbent properties of recycled rubber. From an economic perspective, the production cost of the modified mix was determined to be USD 72.58/m3, practically the same as the traditional mix of USD 72.52/m3, reinforcing the viability of this alternative. It is therefore concluded that the use of GCR and RAP, in controlled proportions of less than 20% and with an optimal AC-20 content of 6.0%, can be an effective strategy for producing more sustainable asphalt mixes without significantly compromising their structural performance or cost.
  • Miniatura
    Item type:Ítem,
    Análisis comparativo de las propiedades mecánicas de mezclas asfálticas con la adición de material PET (polietileno tereftalato), la adición de caucho de nitrilo y pavimento asfáltico tradicional para el mantenimiento vial en grietas longitudinales y transversales
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Civil, 2023-07)
    Herrera Moya, Priscila Monserrath
    ;
    Frías Torres, Alex Xavier
    Currently worldwide environmental pollution has been increasing due to poor waste management, one of the main pollutants are polymers found in materials such as plastics and rubber. In this work, the conventional asphalt mix was modified with the implementation of non-biodegradable recycled material, improving some of the mechanical properties of asphalt, so as to promote the reuse of commonly consumed materials. Conventional asphalt briquettes and asphalt modified with PET (Polyethylene Terephthalate) recycled material and modified with Nitrile Rubber were made in order to analyze their mechanical properties and performance compared to conventional asphalt mixtures, giving these materials a new use. . The behavior of a modified asphalt mixture with the addition of 5, 10, 15 and 20 percent of PET was analyzed, in addition to one modified with 2, 3, 4 and 5 percent of Nitrile Rubber for which ASTM D 1559 and AASHTO T 225; 36 samples were prepared, of which 12 correspond to conventional asphalt mixtures and 24 to modified mixtures, once analyzed the optimum percentage of asphalt and polymer was established, finally through a comparative analysis of the results it was determined that the addition of these materials Several parameters of the asphalt mix improve compared to the conventional one, thus being the sample added with nitrile rubber the best option.
  • Miniatura
    Item type:Ítem,
    Análisis del efecto de la adición de partículas de tereftalato de polietileno (PET) en mezclas asfálticas en frío
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Civil, 2023-01)
    Gavilanes Loor, Shumacher Duvalier
    ;
    Portilla Yandún, Favio Paúl
    Due to an increase in environmental pollution regarding the use of plastic, we proceeded to conduct this research where recycled plastic was incorporated into a cold asphalt mixture in order to identify its mechanical behavior. This research was based on incorporating recycled plastic into a cold asphalt mix using stone aggregates from the Ambato canton and comparing its mechanical properties with a traditional asphalt mix. The behavior of an asphalt mixture was studied by progressively modifying it with the addition of the following percentages of PET of 3, 6, 9, 12, 15 percent by weight; ASTM D 1559 and AASHTO T 225 were used for this purpose; 100 samples were made, of which 20 corresponded to conventional asphalt mixtures and 80 to mixtures with different percentages of (PET/PE/PP). Finally, the maximum and optimum percentage of recycled polymers to be added to the asphalt mixes was established in order to meet and improve the design requirements according to the regulations. It was determined that in cold asphalt mixes the quality of the pavement does not improve in high traffic, but for medium and light traffic it presents flexible and durable characteristics, thus obtaining an optimum percentage of polymer addition for the design of flexible pavements that can be used in the country's roads.