| Abstract [eng] |
Clay paving bricks are manufactured from natural raw materials as clay, sand and water, most commonly used outdoors therefore, are exposed to different environmental conditions such as freeze and thaw, friction and compression. It is very important that clay paving bricks would be resistant to environmental influences and would not lose its physical and mechanical properties over the years. To ensure long service life of clay paving bricks, each produced batch of pavers must be tested by special tests in accordance with requirements of the relevant standards. However, in order to ensure high physical and mechanical properties of clay paving bricks it is necessary to study raw materials and select optimal parameters of technological process. The chemical and mineralogical composition of raw materials such as clay often differs, clay plasticity index, clay melting point, particle size depends on clay formation circumstances and place. For that reason, it is very important to investigate raw materials structure and properties in order to select the optimal parameters for the production of high-quality clay paving bricks. During this study parameters of technological process of clay paving bricks will be observed and influence of chemical compositions of different clays on physical and mechanical properties of clay paving bricks investigated. A modern solution to ensure optimal raw material plasticity were proposed in the production line of clay paving bricks. To evaluate the economic efficiency of the production line modernization solutions, an economic calculation were performed and return on investment evaluation model was developed. |
