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DEVELOPMENT OF SPECIAL REHABILITATION MATERIALS FOR CONCRETE FOR EXTREME STRESS WITH USE OF SECONDARY RAW MATERIALS
Hodul, Jakub ; Klečka,, Tomáš (referee) ; Ďurica,, Tibor (referee) ; Bydžovský, Jiří (referee) ; Drochytka, Rostislav (advisor)
The doctoral thesis deals with finding the use of some waste and secondary raw materials in the production of special polymer remediation materials for concrete, which could be applied even in constructions, where extreme mechanical and chemical load is occurred. The aim of this doctoral thesis is experimental examination of the possibility of using selected types of waste, including hazardous waste which represent the highest risk to environment, and secondary raw materials as a substitute for the currently used primary fillers in order to reduce the ecological footprint of the product itself. Some types of secondary raw materials, such as filter fly ash contaminated by flue gas denitrification process, are no longer used as a concrete admixture or partial cement substitution due to unwanted release of toxic ammonia (NH3). Mainly for this reason, the thesis deals with the progressive utilization of such types of secondary raw materials as well as with another currently unused waste into polymeric patching, grouting and anchoring materials while preserving or improving the final properties compared to reference materials using only primary raw materials. The result of this thesis is to find out suitable formulations for efficient preparation of special polymeric remediation materials for concrete containing waste and secondary raw materials as fillers. The partial aim of the thesis and a the scientific contribution is an observation of the developed materials internal structure using a modern device, CT tomography, an influence of the filler type on the long-term durability, and last but not least the observation of the rate of pollutants incorporation, found in hazardous waste, into the polymeric matric with the aid of EDX and FTIR analysis.
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Adhesion of Adhesive Joints for Facade Applications Made of Wood-based Materials
Nečasová, Barbora ; Schmid, Pavel (referee) ; Sedlák,, Petr (referee) ; Kovářová, Barbora (advisor)
The presented dissertation thesis is focused on investigating the adhesive properties of façade cladding made of wood and wood-based materials in combination with flexible adhesion/assembly systems. The systems allow the implementation of effective construction joints and provide a solution with uniform stress distribution which allows the transfer of heavy loads, while simultaneously reducing the weight of the entire structure, which is also often connected with substantial cost reductions. Despite all that, little attention has been paid to this area so far. It is not a solution which is properly embodied in technical standards or in designers´, architects´ and contractors´ awarenesses. The aim of this dissertation is to characterise adhesive properties of selected façade cladding representatives made of wood and wood-based materials for the purposes of bonded joint application in a ventilated façade system. To define adhesion of façade joints, numerical and experimental methods are used, taking also various limit conditions into account. The main conclusion of the dissertation is the characterisation of basic parameters which influence adhesion, effectiveness and quality of façade glued joints. The secondary conclusion is the compilation of a simple methodical procedure for testing and implementing façade glued joints. The dissertation also makes a contribution by extending the current state of knowledge of façade adhesive joints.
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Use of FRP Composites as Reinforcing Material for Concrete
Kratochvílová, Denisa ; Prokeš,, Jan (referee) ; Bodnárová, Lenka (advisor)
Because FRP composites have high fiber strength and good durability, they are increasingly used for repairs, modernisation and reconstruction of concrete structures. In practice, however there is a risk of premature separation of FRP reinforcement from concrete. This can be avoided by appropriate selecting the fibers and the matrix and the appropriate shape of the reinforcement. The actual materials and consistency of FRP reinforcement with concrete are also covered by this diploma thesis.
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Experimental research of suitability and durability of sealants used in civil engineering
Hanzelková, Martina ; Schmid, Pavel (referee) ; Sedlák,, Petr (referee) ; Šlanhof, Jiří (advisor)
The dissertation thesis is focused of the method of testing the building sealnats. This is a summary of the research focused on the evaluation of sealants in interaction with the underlying materials. Attention is focused on the official test methods contained in European technical standards, the benefits of individual methods, their advantages and disadvantages are discussed. Also included are the overall findings of the practical application of the test procedures applied to 10 commercially available industrial sealants on 8 different substrates, including facade lining boards used for lightweight envelope systems. The dissertation thesis contains general conclusions about individual test methods. The research also includes various ways of preparing and conditioning test specimens that simulate different environmental conditions and, in some cases, play a crucial role in the final evaluation of sealants.
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Structural Properties of Ultralight Concrete and its Optimal Application in Structures
Kadlec, Jaroslav ; Bílek,, Vlastimil (referee) ; Adámek, Jiří (referee) ; Terzijski, Ivailo (advisor)
This doctoral thesis deals with design of three variants of ultra lightweight concrete (ULC) and their mechanical properties. The ULC usually has the dry density of 900-1200 kg/m3 and it is possible to use it for load bearing structures. Low density of ULC is achieved by replacing heavy aggregate for lightweight aggregate. The lightweight aggregate is known under the trade name Liapor in the Czech Republic. To achieve density below 1000 kg/m3, an aeration of the paste has to be done. An exchange of heavy aggregate for lightweight aggregate results in a very fragile behavior of ULC. A great attention is paid to bond strength between concrete and reinforcing steel in the thesis. In addition to the standard test of bond strength testing by pull-out, a modified pull-out test is designed, which includes the effect of minimum reinforcement cover. The mentioned test more precisely simulates a real behaviour of the structure exposed to bending moment. The doctoral thesis tries to point out on different parameters between measured data and the applicable standard for the design of load-bearing structures.
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Changing of social cohesion through courses in nature
Hurda, Jan ; Vomáčko, Ladislav (advisor) ; Kalkusová, Lucie (referee)
Title: Changing of social cohesion through courses in nature Aims: Aim of the study is to provide a comprehensive perspective on the topic of changes of the social cohesion of groups after the course activities in nature. Methods: Methods used in the work are text analysis with secondary data analysis. Results: An analysis of available sources revealed that the odds of outdoor activities have a positive effect on the development of social cohesion among work groups as well as groups of adolescents and sports teams. The work also deals other benefits of outdoor activities courses. Key words: social cohesion, team building, outdoor education, sociometry, group, team
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The Activity of European Peoples Party in The European Parliament. The Challanges and The Perspectives
Málek, Jan ; Rovná, Lenka (advisor) ; Škrábalová, Lenka (referee)
Text of the thesis focuses on the activity of the Group of the European People's Party in the European Parliament. It focuses on this issue from three different perspectives. The first perspective presents a theoretical approach on the concept of europarty as transnational political actor that has developed on the basis of the development of the European integration and the development of the European institutions. The second perspective focuses on the work of the European People's Party, as a classic example transnational European party structure. It refers to its historical development and formation in the context of strengthening the position of the European Parliament. It also encompasses the Group of the European People's Party and its influence in the European Parliament in historical perspective. At the same time reveals the inner structure, program policies and operation mechanism of this parliamentary faction. The third perspective focuses on the analysis of the cohesion of the Group of the European People's Party in the seventh term of the European Parliament. The group cohesion is viewed as one of the main characters determining the strength and importance of the parliamentary factions. The analysis is based on the theoretical assumptions of British political scientist Simon Hix. In...
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Climate of a school class
Zelenková, Blanka ; Linková, Marie (advisor) ; Blažková, Veronika (referee)
The aim of bachelor's thesis is to find out and compare the climate of two 6th (later 7th ) grade classes at the elementary school.The paper deals with deterioration of discipline, study results and hard work of teachers in these classes. The teoretical section defines the basic terms - climate, actors of climate, types of climate, approaches to studying climate and its measurement, social interaction. Practical part introduces the method MCI, then it describes the research and its progress. In the final part of the thesis marked out assumptions are verified.
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Evaluative Language in Electronic Product Reviews
Polášek, Radek ; Mihai, Hana (referee) ; Reich, Pavel (advisor)
Tato práce bude zaměřena na ohodnocení jazyka v recenzích mobilních telefonů. K tomuto účelu bude použita recenze Apple iPhone 7. Apple má širokou nabídku produktů, jmenujme počítače, tablety, hodinky nebo mp3 přehrávače. Mobilní telefony jsou ale jedním z nejpopulárnějších produktů. Z tohoto důvodu, jsou recenze mobilních telefonů perfektním zdrojem pro tuto tezi. Účel této práce je analyzovat a demonstrovat prostředky ohodnocení jazyka v reklamní mluvě a odhalení strategií a jazykových prostředků použitých k ovlivnění čtenáře, při apelování na city, morálku a estetiku chápání. Předpokládám, že recenze jsou zaujaté díky použité formě jazyka, která může obsahovat osobní názory autora nebo metody manupulace se čtenářem. Tyto metody mohou být použity při stylizaci textu, mohou apelovat na emoce nebo sociální zázemí čtenáře nebo mohuu být použity při rozhodování o tom zda a jaké informace v recenzi poskytnout. Tato teze ověří, zda je tato hypotéza platná.
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Participants in local development (Kácov, Chlum, Tichonice, Kladruby)
Jirků, Markéta ; Kocmánková Menšíková, Lucie (advisor) ; Pavel, Pavel (referee)
The main aim of this thesis is to compare and evaluate the importance of social activities, whether and how it contributes to quality and to the development of local life and local communities in the surveyed municipalities Chlum, Tichonice and Kladruby (municipalities under three hundred inhabitants) and compare the social activity of these municipalities with the thee times bigger township Kácov. The aim of this thesis is to find out the reason why smaller municipalities under three hundred inhabitants appear to be
as active as the larger township. The theoretical part defines the terminology related to the topic. The empirical part of the work consists of secondary and comparative data analysis of actors, activities, and community amenities. Secondary and comparative data analysis showed that social life in small municipalities is varied and rich especially
in entertainment, cultural and sport activities. Compared to the bigger township there is less folklore and education activities in smaller municipalities. It was found that the most active municipality is Kladruby with the activity ratio to population of 5,3%, followed by Tichonice with 3,6%, township Kácov with 3,3% and Chlum with 3%. It came out that there is not a direct correlation between the number of actors and social activity of the municipality. The activity of individual actors is different. It means that it is not the truth, that the more groups of actors are in the municipality, the more activities are held by the actors in the municipality. It was found that township Kácov disposes with the most diverse community amenities. Despite of a noticeable impact of community amenities on regularity of organizing activities, this factor is not the only condition for organizing activities. Deficiencies in community amenities can be partially replaced by well-functioning common organizing activities by actors, what is the factor what differentiate smaller municipalities from the large township. Exogenous approach was, over the last ten years, evident in all of the examined municipalities. There was obtained and invested financial resources to the municipalities community amenities, which allowed organizing new activities or continuing with organizing of existing activities. The empirical survey was carried out through semi-structured interviews with the actors operating in the public and nonprofit sector in the examined municipalities. A key factor in the activity organizing is community involvement connected with the mutual cooperation of individual actors (i.e. a combination of utilization of actor´s cultural and social capital). Smaller municipalities may not seem, to the interviewees actors, as active as three times bigger township. Reasons why smaller municipalities may seem as active as the larger township are more significant community involvement and a higher rate
of cooperation between actors in organizing activities in smaller communities. The social life plays an important role in all of the examined communities - especially in creating
and maintaining interpersonal relationships, in strengthening social cohesion, preserving the traditions and creating the relationship with the place. It was found and confirmed how important endogenous approach (active actor) in development of examined communities is. With the proper supplementation and harmonization with exogenous approach
can be the endogenous approach further stimulated.
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