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Permeability of high-alumina refractory castables based on various hydraulic binders
This work investigated the changes in the permeability of high-alumina self-flowing refractory castables based on calcium aluminate cement (CAC) and hydratable alumina binder (HAB) pretreated between 110 and 1650 deg C. Permeability constants kl and k2 were fitted from Forchheimer's equation based on airflow tests conducted at room temperature. The results indicated that dehydration was the main contributing factor for increased permeability in bodies pretreated up to 600 deg C and that sintering effects prevailed between 900 and 1650 deg C. Castables based on HAB were less permeable than those based on CAC, a behavior ascribed to the type of hydrates formed and to the particle-packing features of the matrix and the matrix-aggregate interfaces.
Permeability of high-alumina refractory castables based on various hydraulic binders
This work investigated the changes in the permeability of high-alumina self-flowing refractory castables based on calcium aluminate cement (CAC) and hydratable alumina binder (HAB) pretreated between 110 and 1650 deg C. Permeability constants kl and k2 were fitted from Forchheimer's equation based on airflow tests conducted at room temperature. The results indicated that dehydration was the main contributing factor for increased permeability in bodies pretreated up to 600 deg C and that sintering effects prevailed between 900 and 1650 deg C. Castables based on HAB were less permeable than those based on CAC, a behavior ascribed to the type of hydrates formed and to the particle-packing features of the matrix and the matrix-aggregate interfaces.
Permeability of high-alumina refractory castables based on various hydraulic binders
Permeabilität von feuerfesten Gießmassen mit hohem Aluminiumoxidgehalt und verschiedenen hydraulischen Bindemitteln
Innocentini, M.D.M. (author) / Pardo, A.R.F. (author) / Pandolfelli, V.C. (author) / Menegazzo, B.A. (author) / Bittencourt, L.R.M. (author) / Rettore, R.P. (author)
Journal of the American Ceramic Society ; 85 ; 1517-1521
2002
5 Seiten
Article (Journal)
English
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