Propiedades en estado fresco, endurecido y de durabilidad de escoria argelina activada con carbonato sódico frente a los ataques por sulfato y ácido
DOI:
https://doi.org/10.3989/mc.2023.309922Palabras clave:
Escoria activada alcalinamente, Carbonato sódico, Resistencia mecánica, Retracción por secado, Resistencia a los sulfatos, Ataque ácidoResumen
En este trabajo se investiga el efecto de usar Na2CO3 como activador sobre la durabilidad presentada por los morteros de escoria activados alcalinamente (AAS) frente a los ataques por sulfato y por ácido. Los resultados muestran que las AAS presentan una mayor trabajabilidad, tiempo de fraguado rápido y una alta retracción comparados con la muestra de cemento Portland (PC). El aumento de la dosis del activador tiene un efecto positivo en la resistencia mecánica. El mortero de AAS-Na2SiO3 es el mejor activador en términos de desarrollo de resistencias, pero presenta una retracción más alta. La expansión de AAS cuando es expuesto a Na2SO4 y la pérdida de peso experimentada en ambos ácidos es menor que aquellas presentadas por el PC. El mortero de AAS-Na2CO3 tiene una baja retracción y una alta resistencia al H2SO4 en comparación con los AAS-Na2SiO3 y NaOH, aunque su resistencia mecánica es baja a edad temprana.
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