Propiedades mecánicas de las losas de concreto reforzadas con fibras de acero recicladas provenientes de llantas usadas en Bogotá, Colombia
Resumen
Cada año, millones de llantas usadas no se desechan de forma adecuada y, por tanto, generan un enorme
problema ambiental en el mundo que se podría reducir a partir de la evaluación de este material como alternativa de refuerzo para el concreto. Es bien sabido que la tenacidad del concreto reforzado con fibras de acero se puede evaluar a partir del ensayo de absorción de energía en losas. El objetivo de este artículo es mostrar y analizar los resultados de una investigación enfocada en evaluar la respuesta mecánica de las losas de concreto reforzado con fibras recicladas de acero obtenidas de llantas usadas en Bogotá, Colombia. El programa experimental del estudio incluye 31 ensayos de compresión axial de cilindros y 15 ensayos a flexión en losas de concreto reforzadas utilizando dosificaciones nominales de 15 kg/m3, 30 kg/m3 y 60 kg/m3 de fibras de acero industrial o reciclada obtenidas de llantas usadas. A partir de la respuesta medida, se proponen ecuaciones preliminares de diseño para estimar las propiedades mecánicas de las losas de concreto reforzadas con fibras recicladas de acero.
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