Study of the expansion of cement mortars manufactured with Ladle Furnace Slag LFS

  1. A. Rodríguez
  2. I. Santamaría-Vicario
  3. V. Calderón
  4. C. Junco
  5. J. García-Cuadrado
Journal:
Materiales de construcción

ISSN: 0465-2746

Year of publication: 2019

Volume: 69

Issue: 334

Type: Article

DOI: 10.3989/MC.2019.06018 DIALNET GOOGLE SCHOLAR lock_openOpen access editor

More publications in: Materiales de construcción

Abstract

Los subproductos industriales producidos en la fabricación de acero están siendo utilizados con éxito como materias primas en la producción de materiales de construcción. Sin embargo, las escorias de acero, debido a su naturaleza y composición, pueden causar efectos secundarios indeseables en morteros y hormigones. No obstante, las escorias de acería pueden causar efectos secundarios no deseados en los morteros y hormigones. Los componentes reactivos de las LFS y EAFS pueden afectar a la estabilidad de la matriz de cemento. Esta situación se puede prevenir mediante un adecuado tratamiento previo de estabilización de la escoria y de un estudio de las posibles reacciones de sus componentes mineralógicos, para asegurar su estabilidad en el tiempo. En este trabajo se muestra un proceso experimental para valorar el comportamiento de las escorias blancas de Horno Cuchara LFS cuando se utilizan como áridos en la fabricación de morteros de cemento para albañilería, comprobando su comportamiento en condiciones ambientales adversas, tales como la presencia de humedad, altas temperaturas (80°C) y las posibles reacciones álcali-sílice y álcali-silicato, con el objetivo de determinar su viabilidad en el diseño de morteros. Los resultados muestran un comportamiento adecuado en condiciones de ambientales normales (20°C). Sin embargo, a altas temperaturas (80°C) y en presencia de humedad se desarrollan estructuras cristalinas aciculares que provocan la rotura de la estructura interna de los morteros fabricados con LFS.

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