The diploma thesis deals with the study of the influence of composition and curing of self-leveling cement screeds on their properties in the early stage of maturation. Within this work, various concepts of ensuring the volume stability of cement self-leveling screeds were verified. An anti-shrink additive based on neopentyl glycol and an expansion additive based on hard-burnt lime were used as modifiers. The reduction of plastic and overall shrinkage using various types of liquid membrane-forming compounds was verified on the most volume-stable screed using the optical dilatometry method. The effectiveness of the individual solutions was monitored by continuous measurement of the intensity of evaporation from the screed surface. Subsequently, the effect of membrane-forming compounds on the residual moisture of the cured treated cement self-leveling screed was measured by the carbide method and also the effect of this curing on the adhesion of bonded ceramic tiles.

In this thesis, the development of mechanical properties and structure of latex modified cementious materials during hydration was studied. Latex modified materials are composites of inorganic cement (portland cement) and organic polymer latex. Preparation, processing and fabrication of the polymer cement material based on portland cement was optimized with aim to reach the most compact structure of the product with the finest mechanical characters. The experimental part was pointed to observe influence of the type and amount of polymer latex with focus on mechanical characters and hydration kinetics with given filling as well as without it. In presented work, the possibility of compaction of the material by high-shear mixing within twin-roll mixer (the prototype for production of MDF composite) was verified. The second part of the labor was aimed to analysis of prepared polymer-cementitious material. For determination of influence of batching of added polymer latex on hydration of cement paste the thermal analysis (DTA/TGA) and infrared spectroscopy of composite was done. At last the microscopic observation by optical microscope was carried.

This master´s thesis deals with the suppression of the growing of algae in cooling towers. Subject of the work is suggestion and testing surface modification of the existing mature concrete in order to suppress the growth of algae. In the frame surface modification, several commercially available and newly developed systems were tested. Testing systems are based on the basis of portland cement, geopolymers or formation of insoluble complex compounds containing metal elements (Zn, Cu). Experimental methods were applied in the real environment of cooling towers of Dukovany Nuclear power plant.

This master’s thesis studies the influence of dispersed reinforcement on the behaviour of cement composites at thermal loading. In the theoretical part of the research was performed knowledge of the behaviour of concrete at high temperatures. The paper describes the on-going happening in the individual components of concrete and benefits of using dispersed reinforcement. In the practical part were designed concrete mixtures with different types and quantities of fibers. The object of the research was to determine how different types and amounts of fibers affect the physical - mechanical properties of concrete and their suitability for use in high temperatures.

Subject of the diploma thesis was to resolve influence of grey cast iron on penetration into cement sand. Methodology of trial was designed and its attestation was implemented in experimental and running conditions. On boundary-line cement sand and pouring metal was certified generation of complex allied substances. Created mathematical model of mechanical penetration proved influence of temperature and chemical composition of grey cast iron on range of penetration.

This thesis describes influence of plasticizers and setting accelerators in binder system based aluminasilikates. Following survey includes changes of characteristics of aluminate cements in combination with various setting accelerators. Practical testing and measuring summarizes and compares interdependence of structure, compressive strength, permeability and abrasion resistance. As a final part of thesis individual mixes are analysed economically and are accompanied by suggestions for future use and use in working experience.

The dissertation is focused on the applied technical and economic analysis of the influence separation of transport air from raw meal on the economy clinker/cement production, in specific cement production. The analysis is performed on the basis of a detailed understanding and analysis of the function of each component of the technology of cement production, which are affected by separation of transport air from raw meal, mainly the dosing and preheat system of the raw meal. The results of the analysis show a significant effect (impact) separation of transport air on the production costs.

Methods of utilization waste heat are increasingly on the rise and can be applied in many technologies. One of the technologies is the manufacture of cement, which is focused issue of work. Within the solution, and for understanding the problem is outlined cement production process and the analysis of the waste heat from the process, on this basis are selected a suitable method using waste heat with a closer focus on ORC units. After following evaluation and selection of the most suitable unit is made design, calculation and construction of heat exchangers. The result is the evaluation of the entire proposal.

The aim of this work was to develop the method for the determination of the superperplasticizers (SP) content in the water solution. The method developed was then applied to study the SP adsorption on the individual components used for high-performance concrete and the influence of the temperature and pH values over this adsorption. Furthermore the influence of the water to binder ratio, SP, finely grounded granulated blast furnace slag, fly ash, silica fume, finely ground silica sand and bauxite on the hydration process was studied by means of isoperibolic, isothermal and solution calorimetry. The compressive and flexural strength of most samples used in calorimetric experiments was also determined.

Disertační práce se zabývá studiem reologického chování materiálů na bázi cementu. Úvodní část obsahuje teoretické poznatky týkající se reologie a zkoumaných materiálů (cement, samozhutnitelný beton, superplastifikátory). Poté následuje detailní popis reologických vlastností čerstvých cementových materiálů. Kromě toho je dále uvedena hydratace cementu, kalorimetrie, Vicatův test, rentgenová difrakční analýza a elektronová mikroskopie. Experimentální část práce je rozdělena do dvou částí. První část se zabývá základní charakterizací, reologickým měřením a studiem statické meze toku směsí samozhutnitelných betonů a jejich matric. Druhá část se týká cementových past, které byly podrobeny testování pomocí reometru, Vicatova přístroje, isoperibolického a modulárního kalorimetru, rentgenového difraktometru a elektronového mikroskopu.