The effect of water absorption distribution of recycled coarse aggregate on the compressive strength distribution of high-performance concrete

Xiaoguang Chen; Elke Gruyaert; Özlem Cizer; Jiabin Li

doi:10.3989/mc.2023.350123

Autores/as

Xiaoguang Chen KU Leuven, Bruges Campus, Department of Civil Engineering https://orcid.org/0000-0002-2023-1012
Elke Gruyaert KU Leuven, Ghent Campus, Department of Civil Engineering https://orcid.org/0000-0003-0117-2544
Özlem Cizer KU Leuven, Leuven Campus, Department of Civil Engineering https://orcid.org/0000-0003-4281-8663
Jiabin Li KU Leuven, Bruges Campus, Department of Civil Engineering https://orcid.org/0000-0002-7333-0321

DOI:

https://doi.org/10.3989/mc.2023.350123

Palabras clave:

Árido grueso reciclado, Distribución de absorción de agua, Gradiente de agua, Relación agua/cemento local, Hormigón de altas prestaciones (HPC)

Resumen

La elevada absorción de agua es una característica típica del árido grueso reciclado. Esta característica se utiliza a menudo para explicar la disminución en el rendimiento del hormigón cuando se sustituye el árido grueso natural por el árido grueso reciclado. Se ha prestado mucha atención al valor medio de absorción de agua en el árido grueso reciclado, pero no a la desviación estándar. Este artículo tiene como objetivo evaluar si áridos gruesos reciclados con la misma absorción media de agua, pero diferente desviación estándar, tienen un rendimiento igual en el hormigón de altas prestaciones (HPC). Las mezclas de HPC resultantes mostraron una resistencia a la compresión muy similar. Aun así, se planteó la hipótesis de que a medida que aumenta la desviación estándar de absorción de agua del árido grueso reciclado en un amplio rango, la resistencia a la compresión del HPC aumentará primero debido a las variaciones locales en la relación agua/cemento, posteriormente disminuirá debido a la presencia de partículas débiles y, finalmente, se mantendrá constante debido al papel del nuevo mortero circundante.

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Citas

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