OPTIMIZATION OF CLAY RAW MATERIALS TECHNOGENIC ADDITIVES FOR MAKING WALL CERAMIC PRODUCTS

In today's world ceramic industry is an important component of modern construction. Today it is going through major changes and is in a state of evolution. Unlimited prevalent stocks of raw materials (clay), simple technology, extensive production experience and high durability contributed to their wide application. It should be noted that unlike other materials used in construction, ceramic mass is a natural substance. Its use facilitates adherence to environmental regulations and does not harm the environment around us. Increasing the molding properties of clays investigated in the works of Turgenev D., Velichko Y., Tymoshenko M., Dubinin K. and other. There are many factories for the manufacture of ceramic bricks in Poltava region. Increasing production of effective ceramic wall materials is essential for expanding the resource base. Industrial waste and particularly fly ash and slag thermal power plants are of great interest. They have large reserves of cheap raw material which suitable for the manufacture of various types of ceramic materials. Clay of Poltava district, kaolin, fly ash and slag thermal power plants are the main components of the mixture. Preliminary analysis of system components for building planning matrix is conducted. Aim of the work is to optimize the mix for production of ceramic wall products with addition of technological additives. Planning the experiment was carried out based on the plan Box-Banking. Grade of importance linear regression was carried out based on Fisher criterion. Kaolin, fly ash, slag were chosen as the variable factors. Sensitivity to drying; air shrinkage; plasticity; forming moisture were optimization parameters. 51 samples (17 experiments on three samples) were produced and tested totally. According to the research parameters of the molding moisture of air shrinkage, plasticity and sensitivity to drying were established. Value of the molding moisture varies from 18,63 to 25%. Changing slag does not affect the sensory rate of the molding moisture. Air shrinkage varies between 1,8 to 3,36%. Plasticity changes from 0,9 to 19,81% within the matrix. This means are of considerable impact on slag clay mass. Value of sensitivity to drying does not change in proportion to the slag. For example, with minimum value kaolin, fly ash removal and maximum value obtained slag clay mass is not sensitive to drying. Processing and analysis of experiments were conducted in the program ?Statistika?. The equations of regression and dependence of the contents fly ash, slag and kaolin are present. The most optimal mixture of clay materials from technogenic additives for manufacture of wall ceramics materials were obtained. It is necessary to determine the value of firing shrinkage and sintering optimized composition. For wall ceramics, manufactured by plastic production method optimal plasticity is of the value from 7 to 11%. 1 st and 7th mixtures are recommended for determination of firing shrinkage.