ISSN 0862-5468 (Print), ISSN 1804-5847 (online) 

Ceramics-Silikáty 34, (1) 55 - 60 (1990)


THE EFFECT OF PEAT COMPONENT CONTENT ON THE PROPERTIES OF FINAL PRODUCT IN ROOF TILE PRODUCTION
 
Ranogajec Jonjaua 1, Marinković-Nedučin Radmila 1, Tomanović Rajko 1, Živanović Branislav 2, Radosavljević Svetlana 3
 
1 Faculty of Technology, University of Novi Sad
2 Institute for Testing of Materials, Beograd
3 Institute of Chemistry, University of Novi Sad

Prevention of scaling of roof tiles in the course of their service under diverse and changing atmospheric conditions is directly associated with control of the composition and characteristics of the raw material mixture. Since the scaling phenomenon is caused by the formation of an undesirable crystalline phase, the nature and dynamics of its development was studied in relation with the characteristics of a defined raw material mixture. Formation of the β-CaSO₄ • 0.5 H₂O crystalline phase was confirmed by comparative investigation of real systems, i.e. industrial samples exposed to definite atmospheric conditions, and model systems in laboratory tests. Interaction of the peat and carbonate components with montmorillonite clay in the closed system is considered to be the possible cause of the phenomenon observed.


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