Influence of the synergy between mineral additions and Portland cement in the physical-mechanical properties of ternary binders

Á. Fernández; M. C. Alonso; J. L. García-Calvo; B. Lothenbach

doi:10.3989/mc.2016.10815

Autores/as

Á. Fernández Eduardo Torroja Institute for Construction Science, IETcc-CSIC
M. C. Alonso Eduardo Torroja Institute for Construction Science, IETcc-CSIC
J. L. García-Calvo Eduardo Torroja Institute for Construction Science, IETcc-CSIC
B. Lothenbach Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Concrete and Construction Chemistry

DOI:

https://doi.org/10.3989/mc.2016.10815

Palabras clave:

Cementos con adiciones, Hidratación, Propiedades físicas, , Propiedades mecánicas

Resumen

El artículo aborda la interacción sinérgica de las adiciones minerales en el rendimiento físico-mecánico de mezclas ternarias preparadas con dos tipos de cemento Portland (PC). Se analiza desde las edades tempranas la contribución en los tiempos de fraguado y en el flujo de calor liberado. Las adiciones minerales usadas son escoria de alto horno, ceniza volante y filler calizo. Los PC utilizados se han seleccionado en base al contenido en C₃A y álcalis. Mezclas formuladas con PC de bajo contenido en C₃A y álcalis mantienen desde el inicio una ganancia similar en las prestaciones mecánicas y un refinamiento en el tamaño de poro atribuido a la aceleración inducida por las adiciones minerales en la hidratación inicial del PC. En cambio, mezclas ternarias con un PC con mayor contenido en C₃A y álcalis tienen más lenta generación de resistencias mecánicas iniciales, pero mayores a medida que avanza la hidratación.

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Citas

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