Efecto de la Sustitución Total del Agregado de Cantera por Agregado de Río en la Resistencia del Concreto
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Paul Mauricio Monje Yovera
Socrates Pedro Muñoz Pérez
Luigi Italo Villena Zapata
Juan Martin Garcia Chumacero
Edwin Adolfo Diaz Ortiz
José Luis Quispe Osorio
Resumen
Actualmente, la recolección y el proceso de triturado de agregado finos y gruesos, se ha vuelto costoso y ha aumentado el tiempo de transporte por la complejidad de ciertas zonas en la sierra del Perú. Como consecuencia se extrae agregado de río como sustitución total del agregado fino y grueso para la preparación de concreto estructural, desconociendo a ciencia cierta si es totalmente viable utilizar este agregado para beneficio de intereses constructivos. Por lo cual, este estudio tiene como objetivo evaluar la sustitución total del agregado fino y grueso por el agregado de río obtenido de la ciudad de Cajamarca, Perú sobre las propiedades mecánicas del concreto. Se fabricaron probetas de hormigón con árido fino y grueso y otras con árido de río de las canteras Huaquillo y Portachuelo, respectivamente. Se consideraron los diseños de 175 kg/cm2 y 210 kg/cm2, además ensayos como slump, peso unitario, resistencia a la compresión, flexión y un análisis de varianza (ANOVA) en bloque de Tukey. Se realizó una campaña experimental con pastas cementosas para evaluar el efecto en las propiedades físicas y mecánicas debido al uso de agregado de río, las muestras que contenían agregado fino y agregado grueso revelaron buenos resultados en términos de propiedades mecánicas. Sin embargo, el concreto elaborado con agregado de río cumplen con la resistencia mínima requerida de diseño teórico siendo apta para utilizarse como sustituto total, siendo un tema científico nuevo e importante a destacar.
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