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The influence of crystallization additives to waterproof concrete
Rosecký, Pavel ; Louda, Pavel (referee) ; Hela, Rudolf (advisor)
This bachelor´s thesis deals with influence of crystallization additives to waterproof concrete. In the theoretical part is detailed analysis individual components in concrete production, improving waterproofing properties and finally functions and properties of crystallization materials. In the practical part I deal with influence of selected crystallization additives on properties of fresh and hardened concrete.
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Study of the effect of selected types of aditives on the properties of cement composites
Kavka, Lukáš ; Ťažký, Tomáš (referee) ; Bodnárová, Lenka (advisor)
The diploma thesis describes admixtures for concrete. It deals with the influence of admixtures on the properties of cement composites in the fresh and hardened state. The theoretical part described the individual components of concrete, where the main attention was focused to inert admixtures and their effect on mechanical properties, shrinkage, resistance of cement composites to aggressive medium. Furthermore, the effect of admixtures on concretes with recycled aggregates was described. In the first stage of the practical part, cement mortars with 25, 35 and 50% replacement of cement admixtures were created. In the second stage, concretes with admixtures and a minimum strength class of C30/37 and C50/60 were created. Finely ground granulated slag, micronized limestone and granite stone dust were used as admixtures in mortars and concretes. The change of properties in the fresh and hardened state was observed on cement composites.
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Technical condition of sewer pipes
Došek, Jan ; Raclavský, Jaroslav (referee) ; Hluštík, Petr (advisor)
The aim of this bachelor thesis is to define damages of sewer pipes from the constructional point of view and by selected damages set the limits according to valid standards in the Czech Republic. The beginning of this work is an introduction to the legislative and setting of the basic concepts. Another point of this part is to characterize particular materials and damages by which are they effected. It is the questions of ovalisation, longitudinal bending, positional deviation, mechanical wear, corrosion, crack, pipe break and collapse. The main point of this work are calculation part, where the limits for selected damages of particular materials are set one by one. The result are the summary tables that shows the limits and allow the comparison of these analysed sewer pipe materials.
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Study of the effect of selected types of aditives on the properties of cement composites
Kavka, Lukáš ; Ťažký, Tomáš (referee) ; Bodnárová, Lenka (advisor)
The diploma thesis describes admixtures for concrete. It deals with the influence of admixtures on the properties of cement composites in the fresh and hardened state. The theoretical part described the individual components of concrete, where the main attention was focused to inert admixtures and their effect on mechanical properties, shrinkage, resistance of cement composites to aggressive medium. Furthermore, the effect of admixtures on concretes with recycled aggregates was described. In the first stage of the practical part, cement mortars with 25, 35 and 50% replacement of cement admixtures were created. In the second stage, concretes with admixtures and a minimum strength class of C30/37 and C50/60 were created. Finely ground granulated slag, micronized limestone and granite stone dust were used as admixtures in mortars and concretes. The change of properties in the fresh and hardened state was observed on cement composites.
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Porovnání fyzikálních a mechanických vlastností dvojitého okna vyrobeného v roce 1920 se současnými výrobky
Kazimír, Tomáš
This work is focused on the comparison of physical and mechanical properties of the double window from 1920 and with a window made at present days. Based on the re-sults of tests carried out by an authorized research building joinery product in Zlín, these results were compared. Thesis deals with the comparison of construction of both wainscoting double windows. These windows were tested in the laboratory according to the three most im-portant technical requirements that are currently being placed on the windows. It is a test of air permeability, water tightness and resistance to wind loads.
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Změny technických parametrů oken při změně používaného kování
Hanzlík, Miroslav
The aim of the Bachelor thesis is to determine whether when the fittings for simple windows with a given profile and size is changed, there are changes in the technical parameters guaranteed in the certification. When testing there will be used four identical eurowindows, fitted with four types of fittings from brands ROTO, MACO, WINKHAUS and SIGENIA. The windows will be exposed to the test of air permeability, watertightness, weathering and finally again the air permeability. The results of the work prove, that at each change of fittings is necessary to for a re-certification.
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Vliv změny celoobvodového těsnění na technické parametry oken
Hanzlík, Miroslav
The aim of this thesis is to prove a necessity of re-certification after window seal change. A euro window was made and it was used five types of seals. All of this seals were measured on air-permeability and watertigthness. A differences in air-permeability among seals were measured. It was also determined huge impact on watertighness with correct sealing of head flashing with plastic ending. The watertightness is much better when is end of head flashing with plastic ending sealed with silicone sealant. The conclusion is necessity of re-certification of window after seal change. Because this step has significant effect on final watertigthness and air-permeability of window.
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Porovnání technických parametrů dřevěných a plastových vchodových dveří
Čupr, Milan
The main purpose was to compare the parameters of entrance plastic and wooden doors. The doors were measured in the acredited testing laboratory CSI a. s. Zlín for resistence to wind loads, watherproofness and air permeability. The doors were compared on obtained values and then we detected the weaknesses and strenghts of both types. Depending on the weaknesses and strenghts of the door there were evaluated the possible changes in profile thicknesses and seals and could be evaluated the options which could improve the final test parameters. In the end there was found out depence of the quality and the type of materials on the price door´s construction.
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