Impact of twisting high-performance polyethylene fibre bundle reinforcements on the mechanical characteristics of high-strength concrete

Y. Zhang; L. Yan; S. Wang; M. Xu

doi:10.3989/mc.2019.01418

Autores/as

Y. Zhang College of Basic Education, National University of Defence Technology - Centre for Structural Engineering and Informatics, Faculty of Engineering, University of Nottingham https://orcid.org/0000-0001-7017-1620
L. Yan College of Basic Education, National University of Defence Technology https://orcid.org/0000-0002-9778-1960
S. Wang College of Basic Education, National University of Defence Technology https://orcid.org/0000-0002-6100-8909
M. Xu College of Basic Education, National University of Defence Technology https://orcid.org/0000-0002-7057-6772

DOI:

https://doi.org/10.3989/mc.2019.01418

Palabras clave:

Hormigón de altas prestaciones, Trabajabilidad, Refuerzo de fibras, Propiedades mecánicas, Fuerza de enlace

Resumen

Se han investigado los comportamientos mecánicos cuasi-estáticos y dinámicos de un hormigón reforzado por haces de fibra torsionadas de polietileno de ultra alto peso molecular (UHMWPE) con diferentes fracciones de volumen. Se demostró la mejora en la metodología de la mezcla y la geometría de las fibras que garantizaban una distribución más uniforme de las mismas en el hormigón. Las fibras UHMWPE mejoraron significantemente la resistencia a la tracción y la resistencia residual a la compresión del hormigón. Los resultados muestran que el hormigón reforzado con fibras UHMWPE presentó un comportamiento resistente mejor que el hormigón sin fibras. Debido a la distribución más uniforme de las fibras y a la mayor fuerza de unión en la interfaz fibras/matriz, las fibras UHMWPE con geometría mejorada lograron una mayor resistencia a la tracción y compresión del hormigón de manera más significativa que otras fibras. Las pruebas de compresión dinámica demostraron que el hormigón con fibras UHMWPE tenía una considerable dependencia en la velocidad de tensión. La unión entre fibras y la matriz del hormigón contribuyó a la mejora de la resistencia a bajas velocidades de tensión.

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Citas

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