Ingeniería Civil y Mecánica

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Subject: search.filters.subject.ESCORIA DE SIDERURGIA

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    Evaluación de las propiedades mecánicas de un pavimento flexible tradicional y un pavimento flexible combinado con asfalto reciclado y escoria de siderurgia entre las calles Corazón y Cordillera Occidental del cantón Ambato de la provincia de Tungurahua.
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Civil, 2025-02) Vallejo Espín, Byron Eduardo; Chérrez Gavilanes, Diego Sebastián
    In Ecuador's steel industry, large quantities of steel slag are generated annually, leading to considerable environmental pollution. To mitigate this impact, the incorporation of recycled materials into asphalt mixtures was proposed, including reclaimed asphalt pavement (RAP) and slag as a polymer, aiming to achieve environmental benefits and improve pavement quality. The research was divided into three phases. The first phase involved identifying the extraction sites of materials such as bitumen, aggregates, and recycled materials. In the second phase, the materials underwent characterization tests, including particle size analysis, aggregate density, abrasion tests, Rice test, and the Marshall method. The latter was used to evaluate the stability and flow of briquettes. The experimental design included steel slag and RAP combined with optimal asphalt content (5.5, 6.0, and 6.5 percent). Slag partially replaced fine aggregates (passing the No. 4 sieve), while RAP partially replaced intermediate coarse aggregates (half-inch sieve, retained on the No. 4 sieve). Combinations of 7 percent slag with 10 percent RAP, 10 percent slag with 20 percent RAP, and 13 percent slag with 30 percent RAP were tested. In the third phase, a comparative analysis was conducted based on Marshall criteria between traditional and modified mixtures. The results showed that modified asphalt mixtures with 6.5 percent AC-20 content, incorporating 7 percent slag and 10 percent RAP, and 10 percent slag and 20 percent RAP, as well as those with 6.0 percent AC-20 content, incorporating 13 percent slag and 30 percent RAP, outperformed or equaled traditional mixtures in terms of strength, durability, and environmental sustainability. These mixtures present themselves as a stronger and more eco-friendly alternative for road infrastructure projects.
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    Correlación entre el CBR y las propiedades índice y mecánicas en suelos granulares, de las parroquias pasa y San Fernando, cantón Ambato, provincia de Tungurahua
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Civil, 2020) Claudio Chacón, Karina Marisela; Portilla Yandún, Favio Paúl
    This Experimental work, aims to correlations development between CBR Laboratory tested. (California Bearing Ratio) and Soil’s Mechanical and Properties Index from “Pasa” and “San Fernando” (parishes closer to Ambato City). I have taken 12 samples: 6 from each parish located in 3 different roads choose by the investigator, every sample have enoguh amount of material for testing procedures in the Lab. Once completed, we obtained the Analysis Results for its interpretation allowing to determinate Soil Types and its characteristics. In the Determination process for correlations between two rates, we applied Analysis by Regression, and for the correlation between three different rates we used the Minimun Squared Method (MCO) so The Correlation is aceptable if its Coefficient Determination is higher than 50 percent. As a result we obtained 27 correlations with a Coefficient Determination ranges between 50 percent – 96.13 percent this results subsecuently allowed us to obtain the CBR quite close to the Laboratory Tested CBR Results. So the Required Flexible Pavement Design Thickness in each Capes are the same ones.
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    Análisis comparativo del uso de escoria de siderurgia para la estabilización de suelo
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Civil, 2020) Tirado Gutiérrez, Cynthia Elizabeth; Bayas Altamirano, Myriam Marisol
    The present experimental project aims to stabilize different types of soil of different properties by adding steel slag. Sample # 1 sandy silt soil was subtracted from the Pilisurco province of Tungurahua, sample # 2 clay soil was subtracted from the parish Murialdo province of Pastaza, sample # 3 steel slag was stolen from Canton Ambato. Once the sample and the place were identified, samples were taken from each type of soil. The necessary tests were carried out to establish the type, property and characteristics of each soil. A granulometric analysis and test for the determination of the Atterberg limits were performed to identify the type of soil according to the tables established by the Unified Soil Classification System (SUCS). The Type D Modified Proctor test was run to determine the CBR soil support capacity (California Support Ratio) which gives results of each sample tested as the maximum dry density and the optimum humidity for them to proceed with the CBR test. These tests were carried out with the soil combination plus three percentages 8, 10 and 35% of steel slag. These samples were submerged in water for three days to analyze the sponge generated by each type of soil with the combination with steel slag. For this comparative analysis, the properties and characteristics of the samples were evaluated, such as their moisture content, plasticity and support capacity, which were statistically analyzed with different combinations, resulting in an ideal alternative in which the steel slag It can be used to improve soil properties and its use as a subgrade.