Ingeniería Civil y Mecánica

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Author: search.filters.author.Chicaiza Vélez Ignacio JesúsSubject: search.filters.subject.AGREGADO RECICLADO

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    Análisis del comportamiento a flexión de vigas de hormigón armado con agregado reciclado y catalizador agotado de craqueo catalítico fluidizado sometidas a fuego
    (Ingeniería Civil y Mecánica. Carrera Ingeniería Civil, 2025) Chicaiza Vélez Ignacio Jesús; Medina Robalino Wilson Santiago
    This research focuses on analyzing the flexural behavior of reinforced concrete beams that incorporate recycled aggregate from construction and demolition waste along with spent fluid catalytic cracking catalyst (FCC) as a partial substitute for fine aggregate, when these elements are subjected to extreme thermal conditions of 600°C. This research line emerges as a response to the environmental problem derived from the progressive depletion of natural aggregate sources, whose intensive exploitation has generated significant alterations in ecosystems and threatens the future availability of these strategic resources. Consequently, the use of alternat ive materials is proposed that not only reduce dependence on virgin raw materials but also contribute to optimizing the management of solid waste generated by the construction industry. The experimental methodology adopted comprises three fundamental phases: initially, the physical-mechanical characterization of materials through standardized tests to determine properties such as granulometry, real density, absorption capacity, and moisture content of natural and recycled aggregates. Subsequently, nine reinforced concrete beams with dimensions of 15×15×75 cm are manufactured, using the optimal density method for dosification, where six beams incorporate recycled coarse aggregate and 5% FCC, while three beams constitute the xix control group with conventional aggregates. Three of the beams with alternative materials are subjected to controlled thermal exposure of 600°C to simulate critical fire conditions. Finally, a comparative analysis of structural behavior is performed through flexural tests according to ASTM C78 standard, evaluating flexural strength between beams with natural aggregates, beams with alternative materials without fire exposure, and those subjected to extreme thermal conditions. The obtained results will allow establishing the technical feasibilit y of these alternative materials in structural elements, simultaneously contributing to the environmental sustainability of the construction sector and the development of environmentally responsible technologies, in addition to providing more precise design parameters for future applications in civil works under extreme temperature conditions.