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Dedolomitization in different alkaline media: application to portland cement paste

Autor
García, E.; Alfonso, P.; Labrador, M.; Galí, S.
Tipus d'activitat
Article en revista
Revista
Cement and concrete research
Data de publicació
2003-09
Volum
33
Número
9
Pàgina inicial
1443
Pàgina final
1448
DOI
https://doi.org/10.1016/S0008-8846(03)00095-4 Obrir en finestra nova
Projecte finançador
Estabilidad química de áridos dolomíticos en pastas de cemento Portland en distintas condiciones hidrotérmicas. Aplicación a la durabilidad de morteros y hormigones
URL
http://www.sciencedirect.com/science/article/pii/S0008884603000954 Obrir en finestra nova
Resum
The dedolomitization reaction kinetics is studied through several long-term experiments consisting of an aqueous dispersion of fine powders of dolomite and portlandite with alkalinity between 0.1 and 1 M KOH, at 25 and 75 °C. The experimental results are numerically simulated to calculate the apparent dissolution constant rates for dolomite, kdol. At low temperature, two dissolution stages were observed. In an early stage, part of dolomite powder dissolves quickly until an apparent steady is re...
Paraules clau
Alkali–aggregate Reaction, Dolomite–portlandite, Kinetics, Koh, Simulation

Participants

  • García García, E.  (autor)
  • Alfonso Abella, María Pura  (autor)
  • Labrador Carrasco, Manuel  (autor)
  • Galí Medina, Salvador  (autor)