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Effect of plasticizers on the behaviour and properties of alkali activated materials
Langová, Markéta ; Koplík, Jan (referee) ; Kalina, Lukáš (advisor)
Alkali activated materials could be suitable alternative to construction materials based on ordinary Portland cement (OPC). Therefore, it is advisable to pursue these binders further on. Aim of this thesis is to clarify the effect of lignosulfonate-based plasticizer and polycarboxylate-based superplasticizer on the behaviour and nature of alkali activated materials. For the purposes of studying the efficiency of plasticizing additives, the change of workability of alkali activated blast furnace slag in dependence on time, effect of additives on mechanical properties as well as, with usage of isothermal calorimetry, their impact on kinetics of solidification and hardening had been observed. The stability of the plasticizing admixtures in a high alkaline environment such as water glass and sodium hydroxide had been studied using infrared spectrometry. As a last step, X-ray photoelectron spectroscopy (XPS) had been used while clarifying the chemical changes in the structure of plasticizing additives after adsorption to blast furnace slag.
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Possibilities of using plasticizers and superplasticizers in alkali-activated systems
Langová, Markéta ; Švec, Jiří (referee) ; Kalina, Lukáš (advisor)
Bachelor thesis deals with the preparation and properties alkali activated blast furnace slag after addition of the different types of plasticizers and superplasticizers with the different weight percentage amount. The aim of this thesis is to find suitable plasticizers or superplasticizers which would improve both workability and mechanical properties of alkali activated blast furnace slag. The effect of these admixtures on compressive and flexural strength was determined. In conclusion the behaviour of plasticizing admixtures in alkaline environment through the infrared spectrometry is studied.
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Analýza finanční situace vybraného podniku s přihlédnutím k jeho lokalizaci
Langová, Markéta
The thesis is based on the company's financial statements, which have become the basis for the financial analysis. The aim of this diploma thesis is to evaluate the financial situation of the company in the years 2010 - 2016, to identify the efficiency of its management and to propose possible improvements for the future. The secondary objective is also to assess the quality of the business environment. The work is divided into two parts, a theoretical and a practical part. The theoretical part explains the concept of financial analysis, its most commonly used methods, and the criteria for assessing the business environment. In the practical part there is applied financial analysis of a selected company.
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Technologické možnosti výroby nealkoholických nápojů s využitím pivovarských surovin
Langová, Markéta
The range of beverages is constantly expanding with new sensory attractive products with health benefits. Such products are increasingly accompanied by beverages resulting from the fermentation of non-dairy substrates, and various groups of bacteria or yeasts can be used to ferment fruit and vegetable juices. This work focuses on the possibility of using such microorganisms, brewing and non-traditional raw materials in the production of new beverages. In the practical part, the sensory properties of beverages and the content of some components in connection with the used culture of microorganisms were evaluated. The results of analyzes of fermented beverages were compared with non-fermented beverages and at the same time the work shows that kombucha, lactic acid bacteria and water kefir culture are able to ferment non-dairy substrates, even with the content of hop compounds.
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Moderní technologie nealkoholických nápojů
Langová, Markéta
ABSTRACT The main purpose of this balechor thesis was describe technology of non-alcoholic drinks and focus on modern ways of its processing. The next purpose was focus on trends by raw material which are used, by methods of preservation and packaging of final products. The bachelor thesis with topic Modern technology of non-alcoholic drinks was created in years 2017-2018 at the Faculty of Agriculture, Mendel University in Brno at the Department of Food Technology.
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Analýza sítě turistických tras na Adamovsku
Langová, Markéta
This thesis deals with the analysis of network of hiking trails in Adamovsko. It is primarily focused on a history and development of hiking, the kinds of hiking, cycling, flora and fauna of given area. The work is devoted to chosen area around Adamovsko. It proceeds from my own experience, collected data and elaborated SWOT analysis. At first it will be introduced the area, and then I describe state and amenities in hiking trails, transportation availability and propagation. The goal is to evaluate current state of hiking trails on a defined territory and suggest suitable improvements.
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Effect of plasticizers on the behaviour and properties of alkali activated materials
Langová, Markéta ; Koplík, Jan (referee) ; Kalina, Lukáš (advisor)
Alkali activated materials could be suitable alternative to construction materials based on ordinary Portland cement (OPC). Therefore, it is advisable to pursue these binders further on. Aim of this thesis is to clarify the effect of lignosulfonate-based plasticizer and polycarboxylate-based superplasticizer on the behaviour and nature of alkali activated materials. For the purposes of studying the efficiency of plasticizing additives, the change of workability of alkali activated blast furnace slag in dependence on time, effect of additives on mechanical properties as well as, with usage of isothermal calorimetry, their impact on kinetics of solidification and hardening had been observed. The stability of the plasticizing admixtures in a high alkaline environment such as water glass and sodium hydroxide had been studied using infrared spectrometry. As a last step, X-ray photoelectron spectroscopy (XPS) had been used while clarifying the chemical changes in the structure of plasticizing additives after adsorption to blast furnace slag.
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Possibilities of using plasticizers and superplasticizers in alkali-activated systems
Langová, Markéta ; Švec, Jiří (referee) ; Kalina, Lukáš (advisor)
Bachelor thesis deals with the preparation and properties alkali activated blast furnace slag after addition of the different types of plasticizers and superplasticizers with the different weight percentage amount. The aim of this thesis is to find suitable plasticizers or superplasticizers which would improve both workability and mechanical properties of alkali activated blast furnace slag. The effect of these admixtures on compressive and flexural strength was determined. In conclusion the behaviour of plasticizing admixtures in alkaline environment through the infrared spectrometry is studied.
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