Ingeniería Civil y Mecánica
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Item Desarrollo de un software para el diseño de dosificaciones de hormigón en base al método ACI y densidad óptima(Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Civil., 2025-02) Velastegui Solis, Valeria Nayelly; Pico Núñez, María FernandaConcrete, being a very versatile and durable material, has become essential in modern construction, generating a high dependence on this component both in the Ecuadorian industry and worldwide. Statistics show a constant growth in its consumption in Ecuador, which underlines the importance of ensuring an adequate design of the mixtures. Therefore, in our environment the most used methods for dosing are the Optimum Density method, developed by the Central University of Ecuador and the ACI method, of international nature. For this reason, this project was based on the development of a software that integrates these two methods for the design of concrete mixtures, which has been developed through execution in three phases. In the first phase, the bibliographic review on the ACI and Optimum Density methods was carried out, laying the theoretical foundations of the software. In the second phase, the code and an intuitive graphical interface were implemented, shaping the application. Finally, in the third phase, several tests were carried out to verify the efficiency and precision of the software. In this way, the final product was called "Hormigón Maestro" and it is an application that was validated by comparing its results with manual calculations and experimental data available in freely accessible repositories, obtaining an error of less than two percent, which demonstrates its high reliability. In short, this tool is capable of streamlining the concrete mix design process and ensures the accuracy of the results, becoming a valuable resource for civil engineering professionals and students because it optimizes calculation time, provides a dosage expressed in weight and volume, as well as offering templates and guides to facilitate the use of the program.Item Caracterización mecánica de un biopolímero a partir de almidón de la vaina de haba (vicia faba) y vaina de alverja con proporciones del diseño de experimentación por mezclas(Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Mecánica, 2024-08) Lema Tomalo, Oscar Mauricio; Paredes Salinas, Juan GilbertoDue to environmental conditions, there is a growing demand to produce sustainable materials, especially for biopolymers derived from agro-industrial wastes. Starch is a readily available polysaccharide in this type of waste and one of the most promising candidates to produce degradable polymers, however, its inherent fragility limits its applications. In search of a solution to this problem. The process for the extraction of starch by wet method is detailed, which involves the immersion of the ground raw materials contained in a screen to allow the natural entrainment of starch and by decantation let it accumulate at the bottom. The proportions of the mixture design were used for the percentages of the biopolymer components, determining distilled water as solvent, glycerin as plasticizer, acetic acid was used as additive, and starch extracted from broad bean and pea pods. For the homogenization of the mixture, it was raised to a temperature of 60 degrees Celsius for 8 minutes and constant agitation until all the starch gelatinized, the mixture was poured into molds to be dried at room temperature. According to ASTM D668 standard, the starch-based biopolymer specimens were laser cut with a total of 57, to perform tests on the SHIMADZU AGS-50kNX machine, obtaining a tensile strength of 2.65 MPa, percentage elongation at break of 6 percent and a modulus of elasticity of 30 MPa.