Influence of technological factors on the structural parameters of clay masonry units

Abstract

In this work the influence of eight technological factors (clay, non-plastic materials, burning out additive, waste materials, mixing effectiveness in a mixer, degree of compression in formation heads, level of vacuuming in a vacuum chamber, duration of keeping at the highest burning temperature) on the determined specific characteristics of structural parameters of ceramic samples: reserve of pore volume, relative wall thickness of the pores and capillaries, capillary rate of mass flow under vacuum respectively in the direction of freezing and perpendicular to this, degree of structural in homogeneity, capillary rate of mass flow in the direction of freezing, is analysed applying fractional factorial design at two levels. On before-mentioned by structural parameters it is possible to estimate frost resistance of clay masonry units. Regression equations are derived enabling to predict the values of specific characteristics of structural parameters properties of clay masonry units or knowing the desirable values of the properties to determine the optimal effect of the technological factors under investigation and thus to produce the clay masonry units of different purpose with the desirable properties within certain limits.