Resumo

DELGADO TRUJILLO, Jerrison et al. PORCELAIN STONEWARE TILE MANUFACTURING USING RICE STRAW ASH AS QUARTZ REPLACEMENT. Rev.EIA.Esc.Ing.Antioq [online]. 2015, n.23, pp.41-50. ISSN 1794-1237.

In this research are presented the results of using rice straw ash (RSA) as substitute of filler material for manufacturing stoneware tiles. Specimens of standard porcelain stoneware tile (RS_0) were compared to porcelain stoneware tiles where quartz was replaced by RSA in the formulation in percentages of 25% and 50%, respectively (RS_25 and RS_50). Specimens of semidry triaxial mixtures were prepared by uniaxial pressing, followed by drying and sintering. Porcelain stoneware tile specimens RS_0, RS_25 and RS_50 reached bending strength and water absorption values were in accordance with standard ISO 13006 (Annex G, BIa) (≥ 35 MPa and < 0.5%, respectively). However, porcelain stoneware tile specimens RS_50 showed a shorter temperature range for firing than RS_0 and bloating phenomenon must be considered. This indicates that more careful control is required during the firing process of this porcelain. It was concluded that filler material can be substituted positively by RSA in stoneware tile pastes.

Palavras-chave : Porcelain Toneware Tile; Rice Straw; Rice Straw Ash; Quartz.

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