Experimental study on mechanical and durability properties of concrete incorporating various polyvinyl alcohol fiber lengths and dosages

W.  Chen; Y. Wen

doi:10.3989/mc.2024.368923

Autores/as

W. Chen College of Harbour, Coastal and Offshore Engineering, Hohai University - School of Civil Engineering, Inner Mongolia University of Science and Technology https://orcid.org/0009-0007-3493-9883
Y. Wen Key Laboratory of Coastal Disaster and Defence of Ministry of Education, Hohai University https://orcid.org/0009-0007-1034-9344

DOI:

https://doi.org/10.3989/mc.2024.368923

Palabras clave:

PVA-FRC, Propiedades mecánicas, Resistencia a la fisuración, Penetración de cloruros, Ciclo de secado-humedad, NMR, SEM

Resumen

Para investigar las propiedades del concreto reforzado con fibra de alcohol polivinílico (PVA) (distintas longitudes y dosis de fibra), se realizaron diferentes pruebas experimentales incluyendo propiedad mecánica, resistencia a la fisuración y resistencia al cloruro. El rendimiento general del concreto reforzado con fibra de PVA (FRC) fue analizado de manera innovadora integrando indicadores mecánicos y parámetros de resistencia a la fisuración. Además, se seleccionaron la resonancia magnética nuclear (NMR) y el microscopio electrónico de barrido (SEM) para analizar las causas y mecanismos detrás de las alteraciones en el rendimiento del PVA-FRC. Los resultados experimentales demuestran que la resistencia a la flexión, la característica de resistencia a la fisuración y la resistencia a la penetración de iones de cloruro del PVA-FRC mejoran significativamente en comparación con el concreto ordinario. El aumento de la longitud de la fibra juega un papel clave en la resistencia a la flexión, en comparación con la dosis de fibra. Considerando tanto las propiedades mecánicas como la durabilidad, el PVA-FRC que contiene una fracción de volumen del 0.25% de fibras de PVA de 12 mm (F12-0.25) demostró un rendimiento óptimo.

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