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Wind tunnel experiment of scaled car model preparation
Zedník, Roman ; Doupník, Petr (referee) ; Matějů, Jiří (advisor)
This master thesis focuses on designing of an external six-component balance. This universal concept would provide access of results from different models of wings, aircraft and automobiles with relatively small scales. This work also includes theoretical background needed in aerodynamic testing, analysis of 1D beam element model of scale and explanation of components used in scale. Lastly methods of calibration and measurement in aerodynamic tunnel are described, which can be adopted for this design to achieve the adequate level of accuracy.
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Application of crumb rubber in bituminous binders and in bituminous mixtures
Dašek, Ondřej ; Fišer,, Jiří (referee) ; Vacín,, Otakar (referee) ; Komačka,, Jozef (referee) ; Kudrna, Jan (advisor)
Presented dissertation thesis is focused on the possibility of using the crumb rubber from waste tires for modification of paving grade bitumen. The resulting asphalt rubber can be used as an alternative to polymer modified bitumen in compacted bituminous mixtures. The theoretical part describes the rheological properties of asphalt binders and the history and today state of the art in the world and in the Czech Republic. The practical part of the work contains a description of the properties of chosen crumb rubbers and produced asphalt rubbers focused on their rheological properties and on change of these properties caused by the aging at high temperature. Subsequently, the chosen empirical and functional properties of bituminous mixtures with asphalt rubber are described. Laboratory properties of these mixtures were verified under real service conditions on 32 test sections. Based on the dissertation thesis results the preliminary technical specification of the Ministry of Transport (TP 148) and their following revision were approved. The conclusion of the work summarizes and highlights the results of the dissertation.
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New world experience with Asphalt-Rubber pavement
Jevínová, Alexandra ; Urbanec, Květoslav (referee) ; Kudrna, Jan (advisor)
The road infrastructure and the services provided in road transportation are inseparable part of everyday people´s life, improving economic development, competitiveness and social prosperity. Development of the road infrastructure is extensive process, both financially and technically, and in Czech and Slovak conditions it mostly depends on EU funds. In the recent years there is a great need for new approach of design and realization of the road projects in the selection of the most appropriate solution in feasibility study beginning in the project stage, continuing in realization, taking into account the possibilities of using all kinds of recycled material, which can otherwise end up in the landfills. One of the mentioned materials are also waste tires. The main goal of bachelor thesis is to verify the possibilities of application the waste tires in the road construction focusing on the technology of Crumb Rubber modified Bitumen using “wet process “(continuous blend).
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Aerodynamic Wind Tunnels in the Automotive
Hromada, Martin ; Zháňal, Lubor (referee) ; Vančura, Jan (advisor)
The aim of bachelor thesis is research themed the aerodynamics wind tunnels in the automotive. Thesis contains overview of historical evolution of wind tunnels and their categorization. Following chapter describes main parts of wind tunnel, ways of measurement in wind tunnels and problems during testing.
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Wind tunnel experiment of scaled car model preparation
Zedník, Roman ; Doupník, Petr (referee) ; Matějů, Jiří (advisor)
This master thesis focuses on designing of an external six-component balance. This universal concept would provide access of results from different models of wings, aircraft and automobiles with relatively small scales. This work also includes theoretical background needed in aerodynamic testing, analysis of 1D beam element model of scale and explanation of components used in scale. Lastly methods of calibration and measurement in aerodynamic tunnel are described, which can be adopted for this design to achieve the adequate level of accuracy.
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|
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New world experience with Asphalt-Rubber pavement
Jevínová, Alexandra ; Urbanec, Květoslav (referee) ; Kudrna, Jan (advisor)
The road infrastructure and the services provided in road transportation are inseparable part of everyday people´s life, improving economic development, competitiveness and social prosperity. Development of the road infrastructure is extensive process, both financially and technically, and in Czech and Slovak conditions it mostly depends on EU funds. In the recent years there is a great need for new approach of design and realization of the road projects in the selection of the most appropriate solution in feasibility study beginning in the project stage, continuing in realization, taking into account the possibilities of using all kinds of recycled material, which can otherwise end up in the landfills. One of the mentioned materials are also waste tires. The main goal of bachelor thesis is to verify the possibilities of application the waste tires in the road construction focusing on the technology of Crumb Rubber modified Bitumen using “wet process “(continuous blend).
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Application of crumb rubber in bituminous binders and in bituminous mixtures
Dašek, Ondřej ; Fišer,, Jiří (referee) ; Vacín,, Otakar (referee) ; Komačka,, Jozef (referee) ; Kudrna, Jan (advisor)
Presented dissertation thesis is focused on the possibility of using the crumb rubber from waste tires for modification of paving grade bitumen. The resulting asphalt rubber can be used as an alternative to polymer modified bitumen in compacted bituminous mixtures. The theoretical part describes the rheological properties of asphalt binders and the history and today state of the art in the world and in the Czech Republic. The practical part of the work contains a description of the properties of chosen crumb rubbers and produced asphalt rubbers focused on their rheological properties and on change of these properties caused by the aging at high temperature. Subsequently, the chosen empirical and functional properties of bituminous mixtures with asphalt rubber are described. Laboratory properties of these mixtures were verified under real service conditions on 32 test sections. Based on the dissertation thesis results the preliminary technical specification of the Ministry of Transport (TP 148) and their following revision were approved. The conclusion of the work summarizes and highlights the results of the dissertation.
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