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Energy by-products are very interesting source of raw materials for the production of various kinds of building materials in the Czech Republic. Due to annual production of volumes and also markedly more stable quality is needed more to enforce their utilization. Work provides a unique comprehensive perspective on energy by-products in the Czech Republic. The work assesses really wide spectrum not only domestic energy by-products both from the physico-mechanical or physico-chemical parameters so from point of view of the variability of their properties, structure evaluation or environmental performance. Another important benefit is extensive and complex evaluation of the suitability of an almost complete ash production of company ČEZ for both basic types of artificial aggregates based on fly ash. The work represents a practical view of the producer of energy by-products on the comprehensive problems of power plant operation, material flows and mainly on usability of energy by-products in building materials. Illustratively are presented studies of economic and ecological advantages of substitution conventional raw materials by secondary energy products. The work deals with the issue of optimizing legislative regulations of the Czech Republic, implementation of the regulation European Parliament, for maximum simplification and streamline the process of certification of products based on energy by-products.

This master´s thesis deals with the modernization of several years operating equipment of cold dosing for production of concrete. Solves the complete design of a new conveyor and problems identified in the operation of the device.

Concrete as a building material is subject to continuous innovation and thanks to advanced technology and quantum of research, its properties are still improved. It is logical that the more concrete we produce, the more waste it arises. The volume of this waste can not be stored in landfills endlessly, nowadays most of the waste economies in the world are trying to recycle concrete rubble. The recycling is not such a problem, the technology has been long verified but the quality of the recycled concrete aggregate is unquestionably one of the primary assumption which leads to accomplish required properties of concrete. In fact, the recycling process is „crushing“ the concrete into particles with an effort to eliminate the cement paste on the surface of the aggregate. An ideal solution would be create a resistant and firm coating that would adhere perfectly to the cement matrix. This diploma thesis is focused on the properties of recycled concrete aggregate and methods of improvement and optimization of the concrete mix composition.

The diploma thesis is focused on the behaviour of natural and synthetic aggregates and their behaviour in polymer – cement composites, while being exposed to high temperature. The processes, happening in aggregates and mortar under the thermal load, were described in the theoretical part of the thesis same as the testing of heat effects on the aggregates and mortar. Further, the influence of high temperature on each component of concrete was described, followed by the suggestion of the appropriate components for concrete exposed to high temperature. Various aggregates were tested in the experimental part of the thesis. The basic physical and mechanical properties of aggregates were examined same as their mineralogical composition with using XRD, DTA and SEM methods. At the mortar, the influence of high temperature on the concrete density, compressive strength and tensile strength was defined. The gained knowledge was evaluated in the final part of the thesis

The diploma thesis is focused on the comparison of the influence coarse-grained aggragate on the properties af asphalt concrete. The theoretical part describes issue of production and usage of asphalt mixtures. The practical part evaluates multiple types of asphalt mixtures and describing their properties. Stiffness by a two-point bending test, a wheel tracking test and low-temperature cracking and properties by uniaxial tension test were used to evaluate the properties of the mixtures.

This diploma thesis is focused on the finding and describing of the relationships between petrological parameters and technological properties of rocks used for the production of aggregates (crushed stone). Rock specimens were selected from a geological area of Culm (Lower Carboniferous age) in the area of Nízký Jeseník Mts. and Drahanská vrchovina uplands in the Czech Republic. Studied localities were selected on the basis of the current quarrying operations and also to represent the different strata. The six studied localities encompass Kobylí, Chabičov, and Bělkovice where Horní Benešov formation of Nízký Jeseník is exposed. Locality Valšov represents Andělské Hory formation and locality Nová Ves and Loštice represent Protivanov formation of Drahanská vrchovina uplands. Two specimens were taken from the locality Loštice (one from the second cut because there are produced low-grade aggregates and the third cut where high quality crushed stone is produced). A detailed mineralogical-petrographic examination of the samples was the first step, in an attempt to obtain their mineralogical composition and to identify the major rock-forming clasts. Thin sections were examined by standard polarizing microscopy. The auxiliary UV lamp and thin sections saturated by fluorescent substance were used for the...

This diploma thesis describes with mixing ratio of two kinds of small quarried aggregate for the production of ready mix concrete. The theoretical part summarizes the requirements of Czech technical standards to individual components of concrete, particularly the requirements for fine aggregates. In the practical part were designed the recipes for three classes of concrete and was done checking the properties of concrete in fresh and hardened state. Based on the results were determined the optimal mixing ratio of fine aggregate from location Smiřice and Lípa.

DIPLOMA THESIS IN THEIR THEORETICAL PART ARE FOCUSE , USE LIGHTWEIGHT AGGREGATES FOR THE PRODUCE OF VERY LIGHTWEIGHT CONCRETE, FOCUSES PRIMARILY ON FOAM GLASS AGGREGATES. THERE ARE ALSO MENTIONED OTHERS LIGHTWEIGHT AGREGATES, WHICH WE ARE USE FOR PRODUCE O VERY LIGHTWEIGHT CONCRETE. THEN THERE ARE RISKS UNITED WITH VERY LIGHTWEIGHT CONCRETE. IN THE PRACTICAL PART IS THE PROPERTY ANALLYSIS OF FOAM GLASS AGGREGATES, DESIGN RECIPE VERY LIGHTWEIGHT CONCRETE AND MONITORED MECHANICAL A THERMAL PROPERTIES OF THESE CONCRETE.

The diploma thesis is focused on evaluation of properties of fine aggregate by means of laboratory tests. Fine aggregate evaluation was performed using sieving test, laser diffraction, delta ring and ball test, bitumen number test, uncompacted void content of fine aggregate according to AASHTO T 304, voids of dry compacted filler (Rigden) test and particle density of filler. Laboratory research has led to the discovery of some properties of fine aggregate and their dependencies.