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Use of steel slag to improve the mechanical properties of subgrades in clayey soils
Uso de escoria de acero para mejorar las propiedades mecánicas de las subrasantes en suelos arcillosos
DOI:
https://doi.org/10.15446/dyna.v91n231.109040Keywords:
clay soils; EAF slag; stabilization; maximum dry density; CBR (en)suelos arcillosos; escoria de EAF; subrasante; estabilización; CBR; densidad máxima seca (es)
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Large quantities of steel slag are generated annually throughout the world. Some slag from steel manufacturing is reused in the generation of other materials, such as hot mix asphalt aggregate, pipe filling, concrete, among others. The research aims to enrich the mechanical characteristics of soils and minimize road construction costs. The objective of this research is to find a material that increases the mechanical properties of the subgrade in clay soils with different plasticity indices using Electric Arc Furnace Slag (EAF) in percentages: 5%, 15% and 25% of the weight of the soil. From the tests carried out on the soil samples using parameters, it was possible to classify them by the Unified Soil Classification System (USCS) and also by the American Association of Highway Transportation (AASHTO) as low and high clays. plasticity. When testing the samples in their natural state and the samples with EAF, results were obtained that showed an improvement in the physical and mechanical properties of the clay soils with the addition of EAF, increasing the values of the Bearing Capacity Ratio (CBR) and the maximum dry density. of the clay soil as the percentage of HAE in the mixture increased. The optimal HAE addition content corresponds to 25% of the weight of the soil.
Grandes cantidades de escoria de acero se generan anualmente en todo el mundo. Parte de la escoria de la fabricación de acero se reutiliza en la generación de otros materiales, como agregado asfáltico en mezclas calientes, relleno de tuberías, hormigón, entre otros. La investigación se centra en enriquecer las características mecánicas de los suelos y minimizar los costos de construcción de carreteras. El objetivo de esta investigación es encontrar un material que aumente las propiedades mecánicas de la subsección en suelos arcillosos con diferentes índices de plasticidad utilizando Escoria de Horno de Arco Eléctrico (EAF) en porcentajes: 5%, 15% y 25% del peso del suelo. A partir de las pruebas realizadas en las muestras de suelo utilizando parámetros, fue posible clasificarlas según el Sistema de Clasificación de Suelos Unificado (USCS) y también según el estado natural de la Asociación Americana de Oficiales de Transporte de Carreteras (AASHTO) como arcillas de baja y alta plasticidad. Al probar las muestras en su estado natural y las muestras con EAF, se obtuvieron resultados que mostraron una mejora en las propiedades físicas y mecánicas de los suelos arcillosos con la adición de EAF, aumentando los valores del Índice de Capacidad de Soporte (CBR) y la densidad máxima seca del suelo arcilloso a medida que aumentaba el porcentaje de EAF en la mezcla. El contenido óptimo de adición de EAF corresponde al 25% del peso del suelo.
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