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°C. Permeability constants k1 and k2 were fitted from Forchheimer's equation based...

Full description

Saved in:
Bibliographic Details
Published in:Journal of the American Ceramic Society 2002-06, Vol.85 (6), p.1517-1521
Main Authors: Innocentini, Murilo D. M., Pardo, Arturo R. F., Pandolfelli, Victor C., Menegazzo, Bruno A., Bittencourt, Luis R. M., Rettore, Roberto P.
Format: Article
Language:English
Subjects:
alumina
Applied sciences
Building materials. Ceramics. Glasses
calcium aluminate
cement
Chemical industry and chemicals
Exact sciences and technology
permeability
refractories
Refractory products
Silica-alumina refractories
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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°C. Permeability constants k1 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°C and that sintering effects prevailed between 900° and 1650°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.
ISSN:0002-7820
1551-2916
DOI:10.1111/j.1151-2916.2002.tb00306.x