Journal
CERAMICS INTERNATIONAL
Volume 42, Issue 14, Pages 15383-15396Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2016.06.184
Keywords
Rice straw ash; Porcelain stoneware tile; Sodium feldspar; Feldspathic sand; Design of experiments
Categories
Funding
- Universidad del Valle (Colombia)
- Instituto de Tecnologia Ceramica (ITC), Spain
- COLCIENCIAS
- COLCIENCIAS [110652128358, 521, 325-2011]
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This study examines the effects of replacing fluxing and filler materials with rice straw ash (RSA) in manufacturing porcelain stoneware tile, using the design of experiments (DOE) methodology. The results of the characterization were used to obtain statistically significant, valid regression equations, relating the technological properties of the dried and fired test pieces to the raw materials content in the unfired mixtures. The regression models were analysed in relation to the X-ray diffraction and scanning electron microscopy results and used to determine the most appropriate combinations of traditional raw materials and RSA to produce porcelain stoneware tiles with specific technological properties. The studied range of tile body compositions: clay (40 wt%), feldspar (20-50 wt%), feldspathic sand (5-20 wt%), and RSA (0-25 wt%) was shown to be appropriate for porcelain stoneware tile manufacture. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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