Utilización de áridos procedentes de residuos de construcción y demolición en morteros activados alcalinamente
DOI:
https://doi.org/10.3989/mc.2018.07417Palabras clave:
Morteros, Morteros activados alcalinamente, Residuos de Construcción y demolición (C&DW), Prestaciones mecánicas, Resistencia a fuego, RetracciónResumen
Este estudio explora la viabilidad tecnológica del uso de residuos de construcción y demolición (C & DW) como árido reciclado en morteros activados alcalinamente, determinando el comportamiento mecánico y microestructural. Asimismo, se determinó la retracción sufrida por morteros de escoria activados alcalinamente (AAS) y la resistencia al fuego de morteros de cenizas volantes activadas alcalinamente (AAFA) con incorporación de estos áridos reciclado. Se utilizó arena silícea normalizada y dos tipos de áridos de hormigón reciclado en diferentes proporciones. Los resultados mostraron que la demanda de agua era más alta en los morteros preparados con árido reciclado. También se observó que el reemplazo parcial con un 20% (80/20) del árido convencional con el material reciclado producía morteros con alta resistencia mecánica, aunque la porosidad total también aumentaba. El reemplazo total, sin embargo, dio peor rendimiento mecánico. Los estudios de resistencia al fuego y retracción realizados, indicaron que los morteros de cementos activados alcalinamente preparados con áridos reciclados en proporción 80/20 presentan un rendimiento aceptable.
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