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Hot wire robot cutting of polystyren boards
Dvořák, Roman ; Pochylý, Aleš (referee) ; Kubela, Tomáš (advisor)
This thesis deals with the cutting of flat shapes of polystyrene by industrial robot using Robotmaster. There are some variants of the shaped components that can create by using Robotmaster. The task of the work is also a demonstration task in the realization of use a resistance wire as a tool and polystyrene boards as a workpiece material.
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Testing ways of use of secondary raw materials replacing naturals aggregate.
Vašek, Tomáš ; Holák, Michal (referee) ; Hela, Rudolf (advisor)
Master's thesis consists of two parts, theoretical and practical. In the theoretical section are listed basic information about alternative aggregates used for concrete mixture, like polystyrene, cinder and recycled concrete. Further, the influence of these alternative aggregates, used as secondary raw materials, on the behaviour and properties of fresh respectively hardened concrete. Possibilities of application concrete containing secondary raw materials are mentioned. In the practical part are experimentally verified physical and mechanical properties of concrete containing crushed waste polystyrene beads, furthermore thermal insulation properties and resistance to elevated temperatures is tested. Influence of heating plant cinder powder as active addition to concrete mixture was tested. As a next is prepared concrete with replacement of coarse aggregate by cinder and recycled concrete and tested. The influence of these secondary raw materials on workability, compressive strength, frost resistance and water permeability of concrete is also defined. The last part of research is focused on recycled concrete such as main material used in mixture of aggregates bonded with cement, dispose for base layers in roads. In conclusion are discussed results from experimental research and summary of knowledge’s about using polystyrene, cinder and recycled concrete as aggregates for concrete mixtures.
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Development of a new self-supporting insulation system with respect to dynamic stress
Machala, David ; Frajt, Daniel (referee) ; Drochytka, Rostislav (advisor)
This diploma thesis deals with suggestion of self-supporting insulating system that can be used for objects which insulating is more or less complicated. In this thesis are theoretically processed information about insulation systems while focus is on their structure, composition and principle of operation. Further, there is theoretically designed self-supporting insulating system which is practically built after theoretically composed testing for finding its basic properties. The most appropriate process of realization is formulated at the end after evaluation of the individual tests.
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Practical approach to bulk polymerization of styrene
Pukančíková, Andrea ; Petrůj, Jaroslav (referee) ; Kučera, František (advisor)
The diploma thesis deals with radical bulk polymerization of styrene. Recent knowledges about mono- and multifunctional initiators of radical polymerization and coordination polymerization of styrene with metalocene initiators are summarized in theoretical part. Experimental part of diploma thesis is focused on relationship between polymerization conditions and conversion, molecular mass and distribution of molecular mass. Experiments carried out with monofunctional initiators (dibenzoylperoxide, dilauroylperoxide, tert-butylperbenzoate) and with bifunctional initiators (Luperox 101 and Luperox 256). Polymerizations took place at temperatures from 80 to 134 °C, reaction time was from 1 to 24 hours, and pressure was 100 and 500 kPa. Conversion of monomer was determined by gravimetry and infrared spectroscopy. Molecular mass and indexes of polydisperzity were measured by gel permeation chromatography in solutions of polystyrene with tetrahydrofurane at temperature 23 °C.
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Design of a workplace for polystyrene objects cutting by industrial robot
Macek, Jakub ; Kubela, Tomáš (referee) ; Pochylý, Aleš (advisor)
This Bachelor thesis mainly focuses on the construction of the effector for cutting complex shapes made of polystyrene by an industrial robot. This thesis describes various methods of cutting polystyrene, the choice of the right type of robot, construction of the effector with the possibility of tensing the wire, workplace suggestion, as well as the results of accuracy and precision measurements of the constructed effector.
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Polymeric nanocomposites - preparation methods
Černý, Miroslav ; Žídek, Jan (referee) ; Kučera, František (advisor)
Literature search of bachelor thesis was focused to methods of CaCO3 nanoparticles preparation, surface modification and PS/CaCO3 nanocomposites processing. Experimental part was based on two methods of PS/CaCO3 nanocomposites preparation: emulsion and bulk technique of styrene radical polymerization in presence of CaCO3 and by compounding CaCO3 with PS in Brabender mixer at 220 °C. Prepared samples were observed using electron microscope.
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Construction technology stage in the restoration of the building envelope
Křípal, Vladimír ; Novotný, Michal (referee) ; Diaz, Yvetta (advisor)
The subject of this bachelor’s thesis is offering solution for technological stages of regeneration of a building envelope of Primary school Chrast. The thesis includes regeneration of existing plasters and execution of a contact heating systems using polystyrene plates. The thesis describes technological processes, principles of organization of construction, time scheduling, suggestion of mechanical sets, occupational safety and health, quality requirements and itemized budget.
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Administrative building Brno Hlinky, implementation of facade and roof cladding
Dušková, Lucie ; Liška, Pavel (referee) ; Kovářová, Barbora (advisor)
The subject of this Bachelor thesis is offering solution of technological steps roofing and cladding of an office building in Brno, Hlinky. It is a two storey building, partial basement, the overall module dimensions 9.4 x 37.5 m. Main supporting skeleton consists of roof trusses and ceiling beams that are attached to poles. The roof is purlin, load-bearing layer is trapezoidal sheet, which is on the top flange purlins. The walls are self-supporting, walled. Roof cladding is insulated with layer of polystyrene, the main waterproofing layer is mPVC film. Most of the cladding is designed as external thermal insulation composite systems with ceramic tiles, part of the facade on the west side of the building is made up of wood paneling with an air gap.
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