| Abstract [eng] |
The aim of this master's thesis is to design an additive for Portland cement from a modified mica clay production workshop with a production volume of 130 thousand tons per year. The raw materials of the additive are Šaltiškiai quarry clay, selected for its convenient geographical location and suitable properties, and smectite clay waste performance, which is formed during the process of edible oil bleaching. During the first research part, the properties of Šaltiškiai clay (ŠM), smectite clay waste (SMA) and their mixture were determined. At 600 ° C, 700 ° C and 800 ° C, mixtures of different concentrations were dispensed. The intended ratio of the ŠM and SMA mixture is mixed by adding 10%, 30% and 50% smectite clay waste to the mica clay. The pozzolanic activity of the mixtures, X-ray diffraction analysis of the waste, and simultaneous thermal analysis were investigated. After the tests, a mixture with 30% smectite clay waste was selected. In the second part of the study, a mixture of ŠM and SMA are mixed with Portland cement, adding 5%, 10%, 15%, 20% of the mixture. Hydration of the samples for 7, 28, 90 days is performed, the compressive strength of the samples is determined. The study also requires pure Portland cement and Portland cement mixed with 15% of ŠM. X-ray diffraction analysis and simultaneous thermal analysis are also performed. It has been revealed that the addition of modified mica clay can replace 15% of Portland cement clinker without deteriorating the properties of Portland cement. This composition is chosen for the design of the production manufactory. In the technological part, the production method is selected, the technological line of the description is selected, technological devices are selected, the parameters of the devices are calculated, and the operating mode is determined. The demand for raw materials at each stage of production is calculated, the amount lost in process is determined and the final demand for raw materials is calculated. In the final work, the safety and health of employees is reviewed, the economic performance is valuated, construction solutions determined. Plans of construction territories for the presentation of graphic parts, plans of production premises and equipment layout, principal technological scheme, cross-sectional and longitudinal sections are present. |
