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Article . 2022
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Aplicación del método de disolución selectiva para determinar la reactividad de pastas cementíceas binarias y ternarias con escoria de alto horno

Authors: Scarponi, Nadia Belén; Pico Cortes, Carlos Mauricio; Villagrán Zaccardi, Yury Andrés;

Aplicación del método de disolución selectiva para determinar la reactividad de pastas cementíceas binarias y ternarias con escoria de alto horno

Abstract

La escoria granulada de alto horno es un subproducto de la industria metalúrgica ampliamente usado como adición al cemento gracias a su reactividad hidráulica en medios alcalinos. Es necesario cuantificar el grado de reacción en la evaluación de estos materiales suplementarios. El método de disolución selectiva evalúa la reactividad en condiciones reales como las de las pastas en estado endurecido, a diferencia de otros métodos, considera las interacciones derivadas de la hidratación y no se basa en el consumo de portlandita. En este trabajo se evalúan pastas cementíceas binarias con escoria de alto horno y pastas ternarias con escoria y porcentajes bajos de filler calizo. Los resultados tienen en cuenta correcciones por contenido de magnesio, relacionado con una precipitación secundaria durante el proceso. Los grados de reacción encontrados a distintas edades demuestran la comparabilidad entre mezclas, se evaluó la resistencia a compresión a esas mismas edades. El método de disolución selectiva presenta gran potencialidad para utilizarse en la caracterización de materiales cementantes. En este estudio, la mezcla con reemplazos de 20% de escoria y 20% de filler evidenció el mayor grado de reacción para la escoria.

Granulated blast furnace slag is a by-product of the metallurgical industry widely used as an addition to cement thanks to its hydraulic reactivity in alkaline media. The quantification of the degree of reaction is necessary in the evaluation of supplementary cementitious materials. The selective dissolution method directly evaluates the reactivity under actual conditions such as those that characterize pastes in the hardened state, unlike other available methods, it considers the interactions derived from hydration and it is not based on portlandite consumption. In this work, binary cementitious pastes with blast furnace slag and ternary pastes with slag and low percentages of limestone filler are evaluated. The results take into account corrections for magnesium content, related to some secondary precipitation during the process. The degree of reaction at different ages show direct comparability between mixtures, the compressive strength at those same ages is presented. The selective dissolution method presented great potential for use in the characterization of cementitious materials. For this particular study, the mixture with replacement of 20 % slag and 20 % filler showed the highest degree of reaction.

Fil: Pico Cortes, Carlos Mauricio. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Laboratorio de Entrenamiento Multidisciplinario para la Investigación Tecnológica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina

Fil: Scarponi, Nadia Belén. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Laboratorio de Entrenamiento Multidisciplinario para la Investigación Tecnológica; Argentina

Fil: Villagrán Zaccardi, Yury Andrés. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina

Country
Argentina
Keywords

disolución selectiva, https://purl.org/becyt/ford/2.1, grado de reacción, https://purl.org/becyt/ford/2, materiales cementíceos suplementarios

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
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