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Neutralization of acid solutions
Pavlík, Ondřej ; Bébar, Ladislav (referee) ; Jícha, Jaroslav (advisor)
The present thesis is concerned with neutralization of acid groundwater after the hydrochemical uranium mining in the area of Stráž pod Ralskem. In the thesis is briefly described progression of the hydrochemical uranium mining and follow-up negative impacts on the environment. There is described the technology involved in its disposal. This is followed by the design calculation of major apparatus technology associated with neutralization of acid solutions. Output of technology is determined by the mass balance. The results are the main dimensions of the apparatus, mechanical parts and electric power each device.
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Study of ettringite stability depending on external conditions
Pekárková, Jana ; Brauner,, Josef (referee) ; Durica,, Tibor (referee) ; Bílek,, Vlastimil (referee) ; Gazdič, Dominik (advisor)
The doctoral thesis was focused on the study of thermodynamic stability of ettringite. Ettringite was first prepared in two different ways and then exposed in chosen environments. Furthermore, the stability of ettringite in interaction with calciumsilicates was investigated. As ettringite can be formed as a hydration product of fluidized bed fly ash, the properties of Portland fly ash cement in comparison with Portland cement and Portland slag cement were investigated at the end of the thesis.
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Results of Anorthite Creation in ceramic Body
Beránková, Karla ; Šveda,, Mikuláš (referee) ; Sokolář, Radomír (advisor)
Anorthite is crystalline phase in the ceramic body. Is acquired on burning a mixture of calcium ceramic raw material. This work deals with the influence on the resulting properties of anorthite ceramic body, especially flexural strength, porosity, shrinkage, thermal expansion coefficient. And the influence of different CaO sources on the properties. As a source of CaO was used calcium carbonate, calcium hydroxide and fluid fly ash.
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Study of synthetic sandstones preparation possibilities
Solik, Jaroslav ; Kalina, Lukáš (referee) ; Opravil, Tomáš (advisor)
This thesis explores the possibility of developing synthetic sandstones based on alkaline-activated (geopolymer) binders. The goal is to design an appropriate connective system of optimal concentration, so that the prepared material (artificial stone) showed similar characteristics as natural. The experimental section summarizes the experiments that explore several different alkali connective systems. The aim is to compare the properties of binders prepared from methakaolin (Mefisto K-05 and L-05) alkali-activated by sodium or potassium water glass. For comparison with these connective systems were also prepared samples of commercially supplied geopolymer binder called Baucis
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Study of ettringite stability depending on external conditions
Pekárková, Jana ; Brauner,, Josef (referee) ; Durica,, Tibor (referee) ; Bílek,, Vlastimil (referee) ; Gazdič, Dominik (advisor)
The doctoral thesis was focused on the study of thermodynamic stability of ettringite. Ettringite was first prepared in two different ways and then exposed in chosen environments. Furthermore, the stability of ettringite in interaction with calciumsilicates was investigated. As ettringite can be formed as a hydration product of fluidized bed fly ash, the properties of Portland fly ash cement in comparison with Portland cement and Portland slag cement were investigated at the end of the thesis.
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Study of the influence of limestone firing process on the final properties of hydrated lime
Sklenářová, Dorothea ; Bureš,, Jaroslav (referee) ; Dvořák, Karel (advisor)
The thesis is a part of grant assignment and focuses on the effect of input materials and their burning on the properties of resulting products, i.e. lime and slaked lime. The aim of the thesis is to find out how the behaviour and properties of lime and slaked lime are influenced by chemical composition of limestone, their petrography, genesis and diagenesis, microstructure and porosity. The subject of the experimental part of the thesis is the evaluation of analysis carried out on burned lime and slaked lime samples. Lime samples are examined in terms of their reactivity and porosity, whereas slaked lime samples in terms of their specific surface and sedimentation volume.
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Neutralization of acid solutions
Pavlík, Ondřej ; Bébar, Ladislav (referee) ; Jícha, Jaroslav (advisor)
The present thesis is concerned with neutralization of acid groundwater after the hydrochemical uranium mining in the area of Stráž pod Ralskem. In the thesis is briefly described progression of the hydrochemical uranium mining and follow-up negative impacts on the environment. There is described the technology involved in its disposal. This is followed by the design calculation of major apparatus technology associated with neutralization of acid solutions. Output of technology is determined by the mass balance. The results are the main dimensions of the apparatus, mechanical parts and electric power each device.
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Results of Anorthite Creation in ceramic Body
Beránková, Karla ; Šveda,, Mikuláš (referee) ; Sokolář, Radomír (advisor)
Anorthite is crystalline phase in the ceramic body. Is acquired on burning a mixture of calcium ceramic raw material. This work deals with the influence on the resulting properties of anorthite ceramic body, especially flexural strength, porosity, shrinkage, thermal expansion coefficient. And the influence of different CaO sources on the properties. As a source of CaO was used calcium carbonate, calcium hydroxide and fluid fly ash.
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