Propuesta de diseño de mezcla de concreto hidráulico con incorporación de fibra de pseudotallo de banano
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Date
2025-02-10
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Abstract
El proyecto se centra en la elaboración de una dosificación de concreto conforme a la normativa ACI, incorporando fibras para modificar la mezcla convencional. Este proceso comenzó con la extracción y cepillado de las fibras, asegurando su limpieza y preparación adecuada, lo que es fundamental para mejorar la adherencia en la mezcla. Posteriormente, se realizó un curado de las fibras utilizando hidróxido de sodio, un procedimiento que optimiza sus propiedades físicas y mecánicas antes de ser cortadas en segmentos de 1.5 pulgadas y pesadas para una dosificación precisa, siguiendo las directrices establecidas por la normativa ACI. Se elaboraron testigos de concreto que incluían mezclas con fibras en proporciones del 1.5%, 1.0% y 2.0%, además de una muestra de control sin adición de fibras, lo que permite una comparación efectiva del rendimiento de cada mezcla en condiciones similares. Durante el proceso de elaboración, se llevaron a cabo pruebas de revenimiento y contenido de aire, para evaluar la trabajabilidad de las mezclas y comprender su comportamiento durante la manipulación y colocación en obra. Estas pruebas demostraron que el concreto se pueda verter y moldear adecuadamente. Los testigos fueron sometidos a ensayos de compresión y módulo de rotura a los 7, 14 y 28 días, mostrando que las mezclas alcanzaron altas resistencias, superando el f’c de diseño de 4000 psi y módulo de rotura de 600 establecido por la normativa ACI. Estos hallazgos ofrecen una base sólida para futuras investigaciones en el área de la dosificación de concreto, donde se podrían explorar diferentes tipos de fibras, sus proporciones y métodos de curado para optimizar el rendimiento de las mezclas. Además, se sugiere investigar otros factores que podrían influir en la efectividad de las fibras, como la interacción entre los diferentes componentes de la mezcla y el proceso de curado. Este estudio no solo contribuye al conocimiento actual sobre la dosificación de concreto con fibras, sino que también sienta las bases para futuras innovaciones en la industria de la construcción.
The project focuses on developing a concrete mix according to ACI standards, incorporating fibers to modify the traditional mixture. This process began with the extraction and brushing of the fibers, ensuring their cleanliness and proper preparation, which is fundamental for enhancing adhesion in the mix. Subsequently, the fibers were cured using sodium hydroxide, a procedure that optimizes their physical and mechanical properties before being cut into 1.5-inch segments and weighed for precise dosing, following the guidelines established by the ACI standards. Concrete specimens were fabricated, including mixes with fibers in proportions of 1.5%, 1.0%, and 2.0%, along with a control sample without fiber addition, allowing for an effective comparison of each mix's performance under similar conditions. During the preparation process, slump tests and air content tests were conducted to evaluate the workability of the mixes and to understand their behavior during handling and placement on site. These tests demonstrated that the concrete could be poured and shaped adequately. The specimens were subjected to compression and modulus of rupture tests at 7, 14, and 28 days, showing that the mixes achieved high strengths, exceeding the design f’c of 4000 psi and a modulus of rupture of 600 established by the ACI standards. These findings provide a solid foundation for future research in the area of concrete dosing, where different types of fibers, their proportions, and curing methods could be explored to optimize mix performance. Additionally, it is suggested to investigate other factors that could influence the effectiveness of the fibers, such as the interaction between the different components of the mix and the curing process. This study not only contributes to the current knowledge about fiber-reinforced concrete dosing but also lays the groundwork for future innovations in the construction industry.
The project focuses on developing a concrete mix according to ACI standards, incorporating fibers to modify the traditional mixture. This process began with the extraction and brushing of the fibers, ensuring their cleanliness and proper preparation, which is fundamental for enhancing adhesion in the mix. Subsequently, the fibers were cured using sodium hydroxide, a procedure that optimizes their physical and mechanical properties before being cut into 1.5-inch segments and weighed for precise dosing, following the guidelines established by the ACI standards. Concrete specimens were fabricated, including mixes with fibers in proportions of 1.5%, 1.0%, and 2.0%, along with a control sample without fiber addition, allowing for an effective comparison of each mix's performance under similar conditions. During the preparation process, slump tests and air content tests were conducted to evaluate the workability of the mixes and to understand their behavior during handling and placement on site. These tests demonstrated that the concrete could be poured and shaped adequately. The specimens were subjected to compression and modulus of rupture tests at 7, 14, and 28 days, showing that the mixes achieved high strengths, exceeding the design f’c of 4000 psi and a modulus of rupture of 600 established by the ACI standards. These findings provide a solid foundation for future research in the area of concrete dosing, where different types of fibers, their proportions, and curing methods could be explored to optimize mix performance. Additionally, it is suggested to investigate other factors that could influence the effectiveness of the fibers, such as the interaction between the different components of the mix and the curing process. This study not only contributes to the current knowledge about fiber-reinforced concrete dosing but also lays the groundwork for future innovations in the construction industry.
Keywords
Concreto, Resistencia, Fibra, Pseudotallo, Banano