The Use of Roof Tile Wastes in Stoneware Glazes

ÇAKI M., Kaya S., Gunhan B., Gungor F.

JOURNAL OF THE AUSTRALIAN CERAMIC SOCIETY, vol.50, no.2, pp.68-75, 2014 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 50 Issue: 2
  • Publication Date: 2014
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.68-75
  • Keywords: Roof tile waste, stoneware glaze, alternative glaze material, recycling
  • Anadolu University Affiliated: Yes


In this study usability of roof tile waste, which emerges after production in a roof tile factory in Turkey-Eskisehir, as glaze raw material has been analyzed. Terracotta roof tile wastes' chemical (XRF) and mineralogical (XRD), dilatometer and thermal microscopy analyses, grain size distribution, and color and melting characteristics at 1160 degrees C have been determined. In the first stage, roof tile waste has been used with ulexite, which is a boron compound, in a binary glaze system; in the second stage however roof tile waste has taken place in transparent stoneware glaze recipe with varying rates from 40 % to 95 %. Following the glaze firings at 1160 degrees C, it has been observed that matte and flossy glazed surfaces changing from brown to black have been formed.