Technology for production of reduced yellow paving stones on the basis of modified marl clay from the Alexandra quarry, the village of Lovets, Bulgaria (Part 1)

  • 1 Bulgarian Academy of Sciences, Institute of Metal Science, Equipment, and Technologies with Center for Hydro- and Aerodynamics “Acad. A. Balevski ”, Bulgaria


Due to the specifics of marl clays, research to date has shown the need to stabilize these clays with respect to their critical melting point. The research is based on a previous analysis of pure raw material from marl clay, located in the area of the village of Lovets, which is modified by various additives. On the one hand, the modification is used to stabilize the ceramic mass and on the other hand, by adding various agents, the aim is to lighten the composition and obtain the required color pattern. For the purposes of production, the experimental part includes laboratory development of a scale model of yellow paving stone. The development presents the entire process of creating instrumental equipment – model making and matrix construction, and molding of finished products – pressing process for paving stones productionfrom modified marl clay. The technological cycle that can be implemented in the real conditions for yellow paving stones production will rely on the present study.



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