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Revitalization of Selected Lightweight Cladding of Buildings, Implemented in the Czech Republic before 1990
Liška, Pavel ; Gašparík,, Jozef (referee) ; Sedlák,, Petr (referee) ; Kovářová, Barbora (advisor)
The dissertation thesis is focused on a design of new methodology that can be used for selection of optimal variant for the revitalization of light building facade system known as OD-001 “Boletice panel” when current construction solutions and materials are implemented. Thermographic measurement and engineering survey of selected buildings was carried out to determine the defects and insufficiencies that might accompanied these structures and their revitalization. Another point of my thesis was a possibility of revitalization by bonded facade. Mechanical resistance of bonded facade was verified throughout experimental testing and by mathematical calculation. The usability was confirmed on the basis of specific criteria that were stipulated in advance. The selected criteria are focused on areas which are important for investors. These are mainly financial cost, payback period but also the impact on the environment. Simulations and advanced methods of decision making were used.
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Design of new materials for rehabilitation of utility networks using CIPP method
Jakubíková, Karolína ; Hodná, Jana (referee) ; Drochytka, Rostislav (advisor)
The thesis deals with the design of new materials for the rehabilitation of utility networks using sing the method of trenchless technology (CIPP). It is a special polymer resin containing filler which saturates a suitable fabric in the form of sleeves. In this thesis, the attention is focused mainly to the use of secondary raw materials in the form of fillers and the improvement of mechanical properties of CIPP, including reducing the financial demands of this remediation material. The use of by-products as the fillers is in this thesis investigated both from the point of view of the processability of the material and from the point of view of the resulting mechanical properties.
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Mechanical and Chemical Surface Endurance of polymers materials, testing and posibilities fro improvements
Vaníček, Štěpán ; Seidlová, Michaela (referee) ; Petránek, Vít (advisor)
Mechanical and chemical resistant multilayer polymeric floors are the most important characteristics of classification in the evaluation of surface and texture. Mentioned as organic binders which are used for the realization of the matrix. Further discussion on how to get fillers forming the supporting folder. Created a summary of the key test of mechanical and chemical characteristics according to current standards. The theoretical part is concluded with a reflection on the possibilities of improving the surface resistance of synthetic floors. The practical part was focused on testing the strength, resistance to impact and adhesion to the base layer. Finally, the overall evaluation of the test results in accordance with the theoretical part.
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Use of organic fibers in fine-grained cement composites and their influence on the monitored properties
Mazán, Tomáš ; Ondráček, Michal (referee) ; Křížová, Klára (advisor)
The diploma thesis describes the possibilities of using organic fibres to improve the properties of cement composites at high temperatures. The theoretical part of the thesis deals with the behaviour of the different components of concrete and concretes in fire. A substantial part is devoted to the types of fibres, the method of dosage and the effect of their use on selected parameters. The practical part of the thesis is based on the developed methodology. On the basis of the results obtained, a summary of the behaviour and transformations of different types of organic fibres when exposed to temperatures from 20 to 800 °C was compiled. Furthermore, the observed parameters and the effect of the fibres, especially on the strength of the composite loaded at high temperature, are evaluated. The final of thesis concludes with recommendations for fibre dosage and the suitability of using recycled fibres.
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SPECIAL POLYMER COATINGS AND SCREEDS MATERIALS WITH USE OF SECONDARY RAW MATERIALS
Žlebek, Tomáš ; Seidlová, Michaela (referee) ; Bydžovský, Jiří (referee) ; Ďurica, Tibor (referee) ; Drochytka, Rostislav (advisor)
The work deals with the development of new polymeric coatings and screeds – epoxy, polyurethane and vinyl ester materials with the use of hazardous waste in the form of fillers. The areas that are destined for their landfill are constantly expanding and the costs of disposing of this waste are high. Their use eliminates negative impacts on the environment, but also leads to significant financial savings. The aim of this PhD thesis was to find a suitable way to treat selected hazardous waste and experimentally verify the possibilities of using the fillers pre-treated by optimal way in polymer coatings and screeds. The coatings and screeds are intended primarily for concrete substrates but the possibility of use on metal substrates, asphalt and cement-bonded particle boards was also been verified. These materials serve as a secondary protection of structures against the adverse effects of weather conditions. Secondary raw materials were used as fillers, which were fluidized bed combustion fly ash contaminated due to flue gas denitrification and specially pre-treated hazardous waste (solidification products). The aim was to proceed progressive use of the secondary raw materials as much as possible in order to reduce landfilling in the maximum possible way. It was necessary to treat hazardous waste in such a way that the most effective solidification would be achieved. The behavior of the solidifaction products in the polymer matrix, the distribution of particles in the structure and the disruption of coatings and screeds due to chemical stress were also investigated.
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Design of new materials for rehabilitation of utility networks using CIPP method
Jakubíková, Karolína ; Hodná, Jana (referee) ; Drochytka, Rostislav (advisor)
The thesis deals with the design of new materials for the rehabilitation of utility networks using sing the method of trenchless technology (CIPP). It is a special polymer resin containing filler which saturates a suitable fabric in the form of sleeves. In this thesis, the attention is focused mainly to the use of secondary raw materials in the form of fillers and the improvement of mechanical properties of CIPP, including reducing the financial demands of this remediation material. The use of by-products as the fillers is in this thesis investigated both from the point of view of the processability of the material and from the point of view of the resulting mechanical properties.
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Research report from the evaluation of the wooden construction of the movable roof of the garden pavilion Paraplicko in Cesky Krumlov Castle
Kloiber, Michal ; Bláha, Jiří ; Buzek, Jaroslav
The umbrella-shaped roof of the lookout pavilion can be lifted about a meter above the parapet wall by means of a unique lever mechanism. The impulse to write out the report was an order from the Český Krumlov Castle Administration with the seat of the Castle No. 59, Český Krumlov - Latrán which required to assess the condition of all important timber elements using NDT instruments and, in particular, to measure mechanical properties of wood. For that purpose the two apparatuses designed at ITAM were used to measure continually the mechanical resistance during the pressing of the jaws in the drilled hole and the resistance during the pushing of the steel pin to the surface. Gained results should contribute to design a gentle restoration of the unique lifting device
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Revitalization of Selected Lightweight Cladding of Buildings, Implemented in the Czech Republic before 1990
Liška, Pavel ; Gašparík,, Jozef (referee) ; Sedlák,, Petr (referee) ; Kovářová, Barbora (advisor)
The dissertation thesis is focused on a design of new methodology that can be used for selection of optimal variant for the revitalization of light building facade system known as OD-001 “Boletice panel” when current construction solutions and materials are implemented. Thermographic measurement and engineering survey of selected buildings was carried out to determine the defects and insufficiencies that might accompanied these structures and their revitalization. Another point of my thesis was a possibility of revitalization by bonded facade. Mechanical resistance of bonded facade was verified throughout experimental testing and by mathematical calculation. The usability was confirmed on the basis of specific criteria that were stipulated in advance. The selected criteria are focused on areas which are important for investors. These are mainly financial cost, payback period but also the impact on the environment. Simulations and advanced methods of decision making were used.
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Mechanical and Chemical Surface Endurance of polymers materials, testing and posibilities fro improvements
Vaníček, Štěpán ; Seidlová, Michaela (referee) ; Petránek, Vít (advisor)
Mechanical and chemical resistant multilayer polymeric floors are the most important characteristics of classification in the evaluation of surface and texture. Mentioned as organic binders which are used for the realization of the matrix. Further discussion on how to get fillers forming the supporting folder. Created a summary of the key test of mechanical and chemical characteristics according to current standards. The theoretical part is concluded with a reflection on the possibilities of improving the surface resistance of synthetic floors. The practical part was focused on testing the strength, resistance to impact and adhesion to the base layer. Finally, the overall evaluation of the test results in accordance with the theoretical part.
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