Descripción: “...Los resultados permi- tieron concluir que la CTA bajo las condiciones de obtención, sí reemplaza parcialmente el material de relleno utilizado en la elaboración de gres porcelánico.AbstractIn this research are presented the results of using rice straw ash (RSA) as substitute of filler material for manu- facturing 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). ...”