The influence of CuO nanoparticles and boron wastes on the properties of cement mortar

M. Yildirim; E. M. Derun

doi:10.3989/mc.2018.03617

Autores/as

M. Yildirim Department of Chemical Engineering, Faculty of Chemical and Metallurgical Engineering, Yildiz Technical University https://orcid.org/0000-0003-1383-3151
E. M. Derun Department of Chemical Engineering, Faculty of Chemical and Metallurgical Engineering, Yildiz Technical University https://orcid.org/0000-0002-8587-2013

DOI:

https://doi.org/10.3989/mc.2018.03617

Palabras clave:

Resistencias a compresión, Mortero, Análisis térmico, Tatamiento de residuos, Difracción de rayos X

Resumen

En este estudio, se investigaron las resistencias a compresión y flexión, las propiedades térmicas y las estructuras porosas de morteros modificados con dos tipos de residuos de boro y distintas cantidades de nanopartículas de CuO. Los morteros se prepararon con un 3 % de boro-yeso o residuos de boro y nano-CuO, en concentraciones de hasta el 4 %. Se realizaron ensayos de tiempo de fraguado, resistencias mecánicas a 3, 7 y 28 días, ATD/TG, DRX, area BET y absorción de agua y se determinaron los porcentajes óptimos de nano-CuO. Se observó que la adición de nano-CuO en el rango del 2 – 2,5 % mejora las propiedades mecánicas, reduce la cantidad de portlandita sin reaccionar, aumenta la resistencia de absorción del agua y disminuye el tiempo de fraguado en morteros que contienen residuos de boro. Los resultados muestran que el nano-CuO favorece las reacciones de hidratación, actua como nanofiller y proporciona un punto para las reacciones de nucleación.

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Citas

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