RESEARCH OF EXTREME TENSION OF SHIFT OF THE SYSTEM LIMESTONE POWDER ─ INTERSLATE CLAY ─ WATER" AT THE INCREASED TEMPERATURES

Abstract

Ceramic brick based on interlayer clay and lime flour is obtained without using natural traditional materials. The process of drying ceramic bricks should be carried out according to the optimal mode, which means a combination of its possibly short duration, minimum expenses of energy and quality semi-finished product ─ lack of buckling, Cracks and hidden stresses, which contribute to the formation of cracks in the burning When making ceramic brick only from interlayer clay, Used as clay binder, without the use of repellents, there is a sharp drop in the limit shear stress in the temperature range of 20-80 °C, obviously due to the appearance of cracks and deformation curves. The use of lime flour in ceramic masses in the production of ceramic brick slows down the drop of the limit shear stress in the temperature range 20-80 °C. Researches showed that for improvement of drying properties of ceramic weight the "limy flour interslate clay water" system is more uniform, in relation to the "interslate clay water" system. Analysis of the shear stress limit under hot molding conditions has shown that the function of plastic strength versus molding humidity Pm = f (W, t) is of particular importance in this case than the function of plastic strength versus temperature Pm = f (t).