ANÁLISIS DE LA INFLUENCIA DEL CONTENIDO DE FIBRA DE ACERO EN RELACIÓN CON EL EXCESO DE VOLUMEN DE PASTA DE HORMIGÓN DE ULTRA ALTO RENDIMIENTO.
DOI:
https://doi.org/10.36557/2674-9432.2026v5n1p3126-3151Palabras clave:
CUAD, Fibras de aço, MisturaResumen
El hormigón de ultra alto rendimiento (UHPC) es conocido por sus excepcionales propiedades. El objetivo de esta investigación fue analizar la influencia del contenido de fibra de acero y el volumen de pasta en las propiedades del UHPC y evaluar su rendimiento en estado fresco y endurecido. Se realizaron ensayos con diferentes contenidos de fibra de acero (0% a 5%) y volúmenes de pasta (20%, 40%, 60% y 80% de exceso de pasta), considerando la esparcibilidad, la trabajabilidad y la resistencia a la compresión. En estado fresco, se observó que la adición de fibras redujo la esparcibilidad, con una disminución de entre el 6% y el 21%. Por otro lado, aumentar la cantidad de exceso de pasta mejoró la fluidez y la trabajabilidad de las mezclas. En estado curado, no se observaron diferencias estadísticamente significativas entre las mezclas con diferentes contenidos de pasta. Sin embargo, se encontró que aumentar el contenido de fibra redujo la resistencia a la compresión del UHPC. Aumentar la cantidad de pasta sobrante no tuvo un efecto significativo en la resistencia, pero sí mejoró la fluidez y la consistencia de la mezcla en estado fresco. La investigación demostró que el contenido de fibra afecta la trabajabilidad y la resistencia del UHPC, mientras que el volumen de pasta favorece la fluidez sin comprometer la resistencia a la compresión en estado endurecido.
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