Effect of recycled fine powder as a calcium source on fresh and hardened properties of geopolymer mortar

A.  Sharma; P. Singh; K. Kapoor

doi:10.3989/mc.2024.359923

Autores/as

A. Sharma Department of Civil Engineering, Dr B R Ambedkar National Institute of Technology https://orcid.org/0000-0003-3273-3703
P. Singh Department of Civil Engineering, Dr B R Ambedkar National Institute of Technology https://orcid.org/0000-0002-4703-2646
K. Kapoor Department of Civil Engineering, Dr B R Ambedkar National Institute of Technology https://orcid.org/0000-0002-8284-165X

DOI:

https://doi.org/10.3989/mc.2024.359923

Palabras clave:

Cenizas volantes, Polvo fino reciclado, Mortero de geopolímero, Resistencia a la compresión, Absorción de agua, Ataque ácido, Retracción por secado

Resumen

Este estudio explora la eficacia del polvo fino reciclado (RFP) derivado de residuos de construcción y demolición como sustituto sostenible del cemento Portland ordinario (OPC) como fuente de calcio (Ca) en morteros de geopolímero. Las propiedades frescas del Mortero Geopolímero (GPM) se evaluaron en términos de asentamiento, tiempo de fraguado inicial-final, mientras que las propiedades endurecidas se evaluaron en términos de resistencia a la compresión (CS), absorción de agua (WA), porosidad, ataque ácido y retracción por secado tanto a temperatura ambiente como con curado a elevada temperatura. Los resultados indican que el RFP funciona bien en todas las mezclas. Sin embargo, la mezcla C10R10 muestra los mejores resultados generales, ya que se observó una resistencia a la compresión un 17% mayor en comparación con la mezcla C20R0, que aumenta hasta un 88% en comparación con la mezcla C0R0. Por tanto, RFP proporciona suficiente contenido de Ca como activador en GPM.

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Citas

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