If you are experiencing problems downloading PDF or HTML fulltext, our helpdesk recommend clearing your browser cache and trying again. If you need help in clearing your cache, please click here . Still need help? Email help@ingentaconnect.com

Effect of Alumina and Silica on the Hydration Behavior of Magnesia‐Based Refractory Castables

$48.00 plus tax (Refund Policy)

Download / Buy Article:

Abstract:

Samples taken from the core of real‐sized castable pieces were studied under TGA, DTA, SEM, and XRD techniques after hydration during normal dry‐out process. The TGA was also performed at bulk samples, and the effect of volume on the hydration process was evaluated. The castables consisted of dead‐burned magnesia with additions of calcined and/or tabular aluminas, or microsilica to the matrix. The addition of alumina in combination with magnesia increased the hydration rate during the drying of the castable due to a lower permeability of the casted piece. Addition of microsilica, on the other hand, reduced damage due to hydration. The microsilica promotes the formation of a low crystallinity chrysotile precursor, due to its reaction with the magnesium hydroxide formed after the hydration of the surface of magnesia grains. This phase alleviates the stress generally associated to hydroxide formation, which otherwise leads to structural spalling.

Document Type: Research Article

DOI: http://dx.doi.org/10.1111/j.1551-2916.2011.04788.x

Publication date: December 1, 2011

Related content

Tools

Favourites

Share Content

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
X
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more