Efecto de la composición mineralógica y granulometría de la escoria blanca de acería como un reemplazo de cemento/árido fino en hormigón

Autores/as

DOI:

https://doi.org/10.3989/mc.2023.301422

Palabras clave:

Hormigón, Escoria blanca de acería, Propiedades mecánicas, Inestabilidad volumétrica, Microestructura

Resumen


La escoria blanca de acería (LFS) presenta potencial para ser valorizada. Sin embargo, su destino es ser depositada en vertedero, debido a barreras tecnológicas en su proceso de valorización. Este trabajo explora el potencial uso de LFS como reemplazo parcial de cemento/árido fino, enfocándose en los efectos de la composición y granulometría de LFS sobre propiedades físico-mecánicas. Se evalúa la composición química/mineralógica (muestras anhidras/hidratadas), propiedades en estado fresco/endurecido y ensayos de inestabilidad volumétrica en hormigón. Los resultados muestran un menor desempeño mecánico con el reemplazo de LFS, alcanzando 32-42 MPa de resistencia a compresión (28 días). La caracterización mineralógica de LFS revela la ausencia de CaO-libre y presencia de periclasa con sus productos de hidratación/carbonatación. Por lo tanto, el proceso de meteorización/maduración afecta principalmente a la CaO-libre. Además, la inestabilidad volumétrica observada se encuentra dentro de los límites establecidos por la EHE (0,04%), donde la periclasa remanente podría ser la responsable de este comportamiento expansivo.

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Publicado

2023-03-06

Cómo citar

Araos, P. ., Montaño, T. ., Valls, S. ., Barra, M. ., & Aponte, D. . (2023). Efecto de la composición mineralógica y granulometría de la escoria blanca de acería como un reemplazo de cemento/árido fino en hormigón. Materiales De Construcción, 73(349), e304. https://doi.org/10.3989/mc.2023.301422

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Artículos

Datos de los fondos

Agencia Nacional de Investigación y Desarrollo
Números de la subvención 72200568