Efecto de diferentes tamaños y contenidos de fibras de PVA y acero en las propiedades mecánicas de materiales cementantes compuestos reforzados con filamentos de CaCO3

Autores/as

DOI:

https://doi.org/10.3989/mc.2019.12918

Palabras clave:

Materiales compuestos, Carbonato de calcio, Refuerzo de fibras, Propiedades mecânicas, Microfisuración

Resumen


En este estúdio, filamentos de carbonato de cálcio (CaCO3) se han empleado como fibras de refuerzo junto com fibras de acero y PVA, com el fin de producir un material cementiceo compuesto híbrido fibrorreforzado (MHFRCC). Para evaluar las propriedades mecánicas de estos materialess, se han empleado normas ASTM y técnicas de resistencia post-fisuración. La mezcla con mejor comportamento a flexión hasta el valor de flecha L/600 fue la compuesta por 1,25% de fibra larga de acero, 0,55% de fibra corta de PVA y 2,0% de filamento de CaCO3. Sin embargo, la mezcla con 1,5% de fibra larga de acero, 0,4% de fibra corta de PVA y 1,0% de filamento de CaCO3 presentó la mejor resistencia a fisuración tras el valor de flecha L/600. Se há visto que los parámetros de flexión aumentan al incrementarse el índice de refuerzo. Los resultados muestran que los filamentos de carbonato cálcio y las fibras cortas de PVA aportan restistencia a fisuración a nível de microescala, jugando um importante papel inhibiendo la formación de micro-fisuras. Sin embargo, las fibras largas de acero y de PVA mostraron um mejor efecto puente em las macro fibras tras uma mayor flecha.

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Citas

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Publicado

2019-12-30

Cómo citar

Cao, M., Xie, C., Li, L., & Khan, M. (2019). Efecto de diferentes tamaños y contenidos de fibras de PVA y acero en las propiedades mecánicas de materiales cementantes compuestos reforzados con filamentos de CaCO3. Materiales De Construcción, 69(336), e200. https://doi.org/10.3989/mc.2019.12918

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