Characterization of non-calcareous "thin" red clay from south-eastern Brazil: applicability in wall tile manufacture

In this work the use of "thin" red clay from south-eastern Brazil (Campos dos Goytacazes, RJ) as raw material for the manufacture of wall tile was investigated. A wide range of characterization techniques was employed, including X-ray diffraction (XRD), X-ray fluorescence (XRF), scanning electron microscopy (SEM), grain-size analysis, and thermogravimetric analysis. The wall tile body was prepared by the dry process. The tile pieces were uniaxially pressed and fired between 1080 - 1180 ºC using a fast-firing cycle. The following technological properties were determined: linear shrinkage, water absorption, apparent density, and flexural strength. The development of the microstructure was followed by SEM and XRD analyses. It was found that the "thin" red clay is kaolinitic type containing a substantial amount of quartz. The results also showed that the "thin" red clay could be used in the manufacture of wall tiles, as they present properties compatible with those specified for class BIII of ISO 13006 standard.

Bibliographic Details

Main Authors:	Sousa,S. J. G., Holanda,J. N. F.
Format:	Digital revista
Language:	English
Published:	Associação Brasileira de Cerâmica 2012
Online Access:	http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132012000100006
Tags:	Add Tag No Tags, Be the first to tag this record!