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The paper briefly reviews results of laboratory testing performed in order to establish the possibility of adopting the process of production of solid bricks from plastic clay and fly ash. The experimental results substantiated the possibility of producing high quality solid bricks from these raw materials by the procedure of semi dry forming and firing in brick making plants. In this way, fly ash from thermoelectric power plant, which is an industrial waste, could be valorized as raw material for production of solid bricks and it would minimize environmental pollution of human environment.

Flish sediments represent atypical raw materials: marls, marly shales and shales. This paper presents the results of laboratory tests of shales. The paper points out the similarities and differences in technological characteristics between the raw materials of the same type, but from different deposits. Experimental work includes chemical, mineralogical and grain size analysis of the raw materials, as well as other relevant ceramic characterizations. The paper also presents a new method of preparing atypical raw materials.