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The effect of particles size on the properties of mortars.
Sehnal, Tomáš ; Krátký, Josef (referee) ; Šiler, Pavel (advisor)
The consumption of concrete as a building material is still increasing over the world. Concrete production is closely associated with CO2 and other greenhouse gases emissions. The reduction of these emissions can be achieved by a higher utilization of secondary raw materials in cement mixtures. This bachelor work is focused on the using of secondary raw material, finely ground granulated blast furnace slag and fly ash from fluidized bed combustion and high temperature combustion. The properties of milling pure cement and cement mortars with addition of secondary raw material will be measured. Compressive strength, flexural strength, and calorimetric measurement will be performed for these prepared mortars.
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Comprehensive flooring system for extreme exposure conditions
Šlancar, Jakub ; Bydžovský, Jiří (referee) ; Drochytka, Rostislav (advisor)
This thesis purposes a solution in form of a high resistance coating reaching a minimum compressive strength of 80 MPa in combination with a adhesive bonding compound and with other additive modifying resulting properties. Furthermore, this thesis is concerned with current state of the floor market and focuses especially on those floors used in extreme conditions, such as heavy manufacturing. Furthermore, The basic testing of this method is also included in this thesis.
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Properties of alkai-activated aluminosilicates subjected to high temperatures
Halasová, Kristýna ; Bayer, Patrik (referee) ; Rovnaník, Pavel (advisor)
Currently the concept of geopolymer or alkali activated aluminosilicate is very mentioned topic. Many studies concerning utilization of these materials have already been made, but if we want to use these materials in building industry in the future, further research will be needed. This thesis deals with the influence of high temperatures on alkali-activated slag, fly ash and metakaolin-based composites. The work compares mechanical and technological properties, microstructural changes and effect off iller on the geopolymer composites heated at 200–1200 °C. In conclusion, the individual properties are compared and application possibilities of these materials are evaluated.
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Study of the influence of additions on the durability of aerated concrete
Halešová, Adéla ; Voves, Jiří (referee) ; Hubáček, Adam (advisor)
The aim of this work is to summarise and consider the possibilities of using admixtures and their influence on the durability of aerated concrete.This bachelor's thesis is based on research findings concerning aerated concrete. Furthermore, it deals with the study of inert and active additions. The experimental part is focused on testing trial samples with the addition of admixtures. It examines what is the rate of the possible chosen physically-mechanical features such as the rate of air density, the durability of surface against the effect of water and chemical defrosting substances and achieving the required strength.
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Possibilities of using different types of admixtures in shotcrete technology
Berčík, Martin ; Brožovský, Jiří (referee) ; Hubáček, Adam (advisor)
The Bachelor’s thesis is conceived in the form of research findings on current knowledge of inert and active ingredients and their effects on the shotcrete. It focuses mainly on the composition of individual ingredients, their function executing in the concrete mix and explains how they affect the selected physical and mechanical properties. The work enlightes the importance of using co-products from the industry production as an additive to concrete in terms of both ecological and partly economical.
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The database of waste incinerators in Europe
Šaldová, Lenka ; Ručka,, Jan (referee) ; Hluštík, Petr (advisor)
The aim of this thesis is to describe modern technological processing lines MSW incinerators. Describe individual objects and their links with the principle of thermal combustion. Processes described in the process line will be: waste reception, storage and waste materials, waste pretreatment, loading of waste into the process, thermal treatment of waste, energy utilization and conversion, gas cleaning, disposal of residues from flue gas cleaning, gas discharge, monitoring and control emissions , cleaning and inspection of wastewater treatment and disposal of ash (kiln ash), discharge (disposal) of solid residues. In the second part of this database will be set up incinerators occurring in Europe with basic information (address, website, kiln type, number of lines, the amount of waste incinerated, etc.). The developed database will be created graphs for better clarity and comparison. The database will be accompanied by the emission requirements of individual countries according to the applicable domestic and European legislation.
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Activation admixtures in concrete
Eger, Lukáš ; Hela, Vlastimil (referee) ; Hela, Rudolf (advisor)
The aim of my bachelor´s work is the summarization and focus on admixure concrete,and the active and inert admixure, which have some positive characteristies for fresh and hardened concrete. Theoretically, I tried to study the increase of their joining potential while this characteristic can be used by either chemici or mechnical way, their combination as well. I also Works on evaluetion of physically mechanical influence for fresh and hardened concrete that can up to 60 days old while the cement was partly substituted by admixure of different character.
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