CLAYS OF CHEŁSTY DEPOSIT - A NEW INDUSTRIAL RAW MATERIAL FOR POLISH CERAMICS
Wyszomirski P.1, FrĄckowiak S.2, Gacki F.2
1University of Mining and Metallurgy, 30-059 Kraków, Mickiewicza 30, Poland; e-mail pwysz@geol.agh.edu.pl
2Group of Ceramic Tileries OPOCZNO, 26-300 Opoczno, ul.Przemys³owa 5, Poland
Key wors: red clays, Upper Triassic, ceramic tiles, Chelsty, Poland
Abstract
The Upper Triassic red clays of the Chelsty deposit are mainly illitic in character with some admixture of smectite and mixed layered illite/smectite. They represent non- or low-calcerous variety. These features and suitable technological parameters (absorbability, shrinkage, bending strength after drying, make-up water, grain-size distribution) make these clays a valuable material for the production of ceramic wall and floor tiles, also roofing tiles and stonewares.