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Study on the possibilities of separation of chlorides from by-pass dust
Havelka, Jaroslav ; Šoukal, František (referee) ; Opravil, Tomáš (advisor)
The thesis deals with the study and the characterization of bypass dusts from the cement plants. The aim of the thesis is to search for the possibilities of the usage of that secondary product by means of the cement production. The thesis focuses mainly on the determination of the amount of soluble substances in the dusts, the dependence of dissolution of the soluble share on water – dust ratio, the dependence of dissolution time on the yield of the soluble share and the influence of the temperature on the yield. The physical and chemical properties of the investigated samples taken from several cement plants in the Czech Republic and Slovakia were found out by using the following methods: by TG/DTA analysis, particles size by laser diffraction, phase composition of raw materials, treated raw materials and evaporation residues by X-ray diffraction. It was further investigated whether there was a link between finesse of the particles and the content of soluble substances (chlorides). This was accomplished by classification of the bypass dusts as fine and coarse fraction on the air cassifier with the target parameter X50 1 m. The aim of the classification was to find out whether some of the fractions carry majority share of some of components.
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Engineering geology conditions of a motorway bridge over Vltava river in Prague
Polák, Zdeněk ; Král, Jan (advisor) ; Havelka, Jaroslav (referee)
Tato diplomová práce se zabývá zhodnocením inženýrskogeologických poměrů mostu na stavbě č. 519 silničního okruhu kolem Prahy včetně vyšetření stability skalních svahů v místě předpokládané výstavby. Jedná se o přemostění hlubokého erozního údolí Vltavy, na jehož svazích vystupují na povrch horniny svrchnoproterozoického stáří. Na lokalitě byly zhodnoceny pomocí rešerše archivních podkladů, vlastní rekognoskace a laboratorních zkoušek, geologické, hydrogeologické a inženýrskogeologické poměry, které jsou přehledně uvedeny v inženýrskogeologické mapě v měřítku 1:2000 a řezu 1:500. Jako podklad pro vyhodnocení stability skalních svahů sloužila podrobná dokumentace skalních výchozů. Samotné vyšetření stability proběhlo pomocí klasifikace Slope Mass Ratting a Marklandova testu pro stereografickou projekci. Na výstupech práce je souhrnně popsán horninový masiv včetně mapy stability skalních svahů v měřítku 1:500 a popsány základové poměry uvažovaného mostu.
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Legal aspects of macroprudential regulation in the EU
Havelka, Jaroslav ; Kotáb, Petr (advisor) ; Vybíral, Roman (referee)
Legal aspects of macroprudential regulation in the EU Abstract Even though the term macroprudential regulation is regularly used in scientific literature, attempts to define this term are scarce. Clear delineation of macroprudential regulation enables the distinction of macroprudential tools from other policy tools, such as microprudential supervision tools or capital controls. Moreover, it allows the determination of essential macroprudential tools and their current application in light of the crisis related to the COVID-19 pandemic and the transition towards the CRR2/CRD5 framework. As part of the EU legal order, macroprudential regulation interacts with the principles of internal market functioning. As a matter of principle, macroprudential measures should not contradict rules governing the internal market, even though some tensions with the free movement of capital may emerge. Uncertainties about the judicial review of macroprudential regulation may also exist. Macroprudential measures should subject to a less rigorous judicial review inspired by CJEU monetary policy case law. The rationale behind this lies in the highly complex economic decision-making process accompanying the adoption of macroprudential regulation. There is vast heterogeneity amongst EU member states concerning the application of...
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Study on the possibilities of separation of chlorides from by-pass dust
Havelka, Jaroslav ; Šoukal, František (referee) ; Opravil, Tomáš (advisor)
The thesis deals with the study and the characterization of bypass dusts from the cement plants. The aim of the thesis is to search for the possibilities of the usage of that secondary product by means of the cement production. The thesis focuses mainly on the determination of the amount of soluble substances in the dusts, the dependence of dissolution of the soluble share on water – dust ratio, the dependence of dissolution time on the yield of the soluble share and the influence of the temperature on the yield. The physical and chemical properties of the investigated samples taken from several cement plants in the Czech Republic and Slovakia were found out by using the following methods: by TG/DTA analysis, particles size by laser diffraction, phase composition of raw materials, treated raw materials and evaporation residues by X-ray diffraction. It was further investigated whether there was a link between finesse of the particles and the content of soluble substances (chlorides). This was accomplished by classification of the bypass dusts as fine and coarse fraction on the air cassifier with the target parameter X50 1 m. The aim of the classification was to find out whether some of the fractions carry majority share of some of components.
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Engineering geology conditions of a motorway bridge over Vltava river in Prague
Polák, Zdeněk ; Král, Jan (advisor) ; Havelka, Jaroslav (referee)
Tato diplomová práce se zabývá zhodnocením inženýrskogeologických poměrů mostu na stavbě č. 519 silničního okruhu kolem Prahy včetně vyšetření stability skalních svahů v místě předpokládané výstavby. Jedná se o přemostění hlubokého erozního údolí Vltavy, na jehož svazích vystupují na povrch horniny svrchnoproterozoického stáří. Na lokalitě byly zhodnoceny pomocí rešerše archivních podkladů, vlastní rekognoskace a laboratorních zkoušek, geologické, hydrogeologické a inženýrskogeologické poměry, které jsou přehledně uvedeny v inženýrskogeologické mapě v měřítku 1:2000 a řezu 1:500. Jako podklad pro vyhodnocení stability skalních svahů sloužila podrobná dokumentace skalních výchozů. Samotné vyšetření stability proběhlo pomocí klasifikace Slope Mass Ratting a Marklandova testu pro stereografickou projekci. Na výstupech práce je souhrnně popsán horninový masiv včetně mapy stability skalních svahů v měřítku 1:500 a popsány základové poměry uvažovaného mostu.
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Possibilities of using of ultra fine content of fly ash from clasical coal combustion
Havelka, Jaroslav ; Šiler, Pavel (referee) ; Opravil, Tomáš (advisor)
This thesis deals with the study of ultra fine content of fly ash from clasical coal combustion. It focuses mainly on the determination of properties of the fly ash – pozzolanic activity, chemical composition, particle size distribution and specific surface area. Possibilities of use of these fly ash were studied by preparation of cement mixtures with the fly ash and subsequent evaluation of physical properties and phase composition of the resulting composites. Phase composition was examined by x-ray powder diffraction.
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