Effect of the addition of nanosilica particles on the properties of two cementitious matrices
Abstract
Effect of the addition of nanosilica particles on the properties of two cementitious matrices
ABSTRACT
This research focused on evaluating the effect of adding silica nanoparticles (NS) to two cementitious matrices, as ordinary portland and sulfoaluminate cement, in order to establish their influence on the mechanical and chemical properties. To conduct this evaluation, the NS were added in dosages of 0.30-to-5.0% by mass relative to cement. The results indicated that the compressive strength and resistance to chemical attack by sulfates were improved due to the addition of silica nanoparticles, in both matrices. Finally, the resistance to chemical attack by sulfates showed an improvement with the addition of silica nanoparticles when comparing with pure cement, suggesting an increase in the densification.
Keywords:Â Reactivity, supplementary cementitious materials.
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Modificación de las propiedades de matrices cementantes mediante la adición de partÃculas de nanosÃlice
RESUMEN
Este trabajo de investigación evaluó el efecto de la adición de nanopartÃculas de sÃlice (NS) a dos matrices cementantes, base cemento portland ordinario y cemento sulfoaluminoso, con el fin de establecer su influencia en las propiedades mecánicas y de resistencia quÃmica de dichos materiales. Para esto, se adicionaron las NS en dosificaciones de 0.30% a 5.0% en peso. Los resultados indicaron que la resistencia a la compresión y al ataque quÃmico por sulfatos, se ven mejoradas debido a la adición de NS. La resistencia al ataque quÃmico por sulfatos se mejoró de forma importante con la presencia de NS en comparación al cemento sin adiciones. Este resultado sugiere que ambas matrices presentaron una mayor densificación.
Palabras claves: Reactividad, materiales cementosos suplementarios.
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Modificação das propriedades de matrizes cimentÃcias através da adição de partÃculas de nanosÃlica
RESUMO
Este estudo avaliou o efeito da adição de nanopartÃculas de sÃlica (NS) em duas matrizes cimentÃcias, base cimento Portland comum e cimento sulfoaluminoso, a fim de estabelecer a sua influência sobre as propriedades de resistência mecânica e quÃmica dos referidos materiais. Para isso, foram adicionadas as NS em dosagens de 0,30% a 5,0% em massa. Os resultados indicaram que a resistência à compressão e ao ataque quÃmico por sulfatos são aumentadas devido à adição do NS. A resistência ao ataque quÃmico por sulfatos melhorou significativamente com a presença de NS em comparação com o cimento sem adições. Este resultado sugere que ambas as matrizes apresentaram uma maior densificação.
Palavras-clave: Reatividade, materiais cimentÃcios suplementares.
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References
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