This paper analyses the influence of portland cement replacement by silica fume (up to 10%) and/ or granulated blast furnace slag (up to 70%) on the hydration cement (XRD, heat of hydration, non evaporable water content and calcium hydroxide content) curing under sealed conditions and their effect on the mechanical strength.The obtained results indicate that binary cements containing silica fume and ternary cements there was a significant increase of hydration rate at early age. At later ages, most of studied cements have an equivalent or greater strength that those obtained in the plain portland cement.
RESUMEN:Cementos con humo de sílice y escoria granulada de alto horno: comportamiento resistente e hidratación. En este trabajo se analiza la influencia de la incorporación al cemento portland de humo de sílice (hasta 10%) y/o escoria granulada de alto horno (hasta 70%) sobre la hidratación (DRX, calor de hidratación, contenido de agua no evaporable y de hidróxido de calcio), bajo condiciones de curado sellado y su incidencia sobre la resistencia mecánica.Los resultados obtenidos indican que en los cementos binarios con humo de sílice y en los cementos ternarios se produce un importante aumento de la velocidad de hidratación en las primeras edades, mientras que a edades más avanzadas la mayor parte del dominio estudiado alcanza o supera la resistencia obtenida por el cemento portland sin adición.
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