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Observation of the development of bituminous binder from asphalt mixture with RAP.
Eliáš, Radim ; Koudelka, Tomáš (referee) ; Varaus, Michal (advisor)
The work is focused on the development of properties of asphalt binder extracted from an asphalt mixture with RAP, which monitors the difference between properties of the binder during laying and then after a period of 6 months after laying of asphalt. In the theoretical part are simply described the various ways of recycling of a flexible pavement, asphalt mix production with the addition of 25% R-cold material and methods of individual tests to determine the properties of the asphalt binder. The practical part deals with the comparison of the results of asphalt binder properties described in the theoretical part is evaluated and the overall aging of the asphalt mix.
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Microsurfacing
Koudelka, Tomáš ; Stehlík,, Dušan (referee) ; Hýzl, Petr (advisor)
This thesis is focused on slurry surfacing technology, particularly on microsurfacing. The theoretical part describes various issues of this technology: composition, manufacturing process, ecology, storage, making and design of the mixture. The practical part presents results of cohesion tests, wearing tests, consolidation and breaking time that has been performed on the mixture for microsurfacing. During the tests, the temperature of both bitumen emulsion and aggregate has been changed several times.
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Slurry surfacing
Koudelka, Tomáš ; Komínek, Zdeněk (referee) ; Hýzl, Petr (advisor)
This thesis is focused on microsurfacing technology. The theoretical part describes modern trends especially in the field of coloured surfaces and special system Flexiplast®. The practical part presents the results of conducted tests, particularly tests of breaking time, cohesion, determination of wearing and determination of friction after polishing. The key advantage is that it specifies which aggregates, which were taken from quarries through the Czech Republic, are convenient for this specialized technology. It was verified that RAP material suits use in microsurfacing. Furthermore, colour mixtures are viable for practical application which was confirmed by tests in the laboratory and trial lying as well. Special use of technology in the system Etanpalst and pictures which show field work are presented.
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Recycling of asphalt mixtures - variability of RAP - parameters
Tuháček, Martin ; Koudelka, Tomáš (referee) ; Varaus, Michal (advisor)
The bachelor thesis is focused on RAP material (Reclaimed asphalt pavement), particularly on its characteristics and usage while producing hot mix asphalt at plant. The theoretical part thoroughly describes different fields of application of RAP, these include both the hot and cold recycling. The practical part, on the other hand, essentially covers the problem of using the maximum feasible amount of RAP in hot mix asphalt mixtures; mechanical and psychical properties of a binder and aggregate grading curves are evaluated. On the basis of the testing results, the classification of RAP is undertaken. Moreover, the variability of RAP characteristics is assessed and compared within two various plants. Therefore, the maximum amount of RAP added is based on the very deviation of each characteristic. Representative samples were of two sizes – 0/11 and 0/22.
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Design and implementation of IS for the centre of free time activities
Koudelka, Tomáš ; Šedivá, Zuzana (advisor) ; Pour, Jan (referee)
This diploma thesis describes the design of an information system for Klub JUNIOR -- centre of children's free time activities operating in the suburb of Pra-gue 4. The main objective is to design and analyse options of the acquisition and implementation of information system in this organisation that does not use any IS yet. Thanks to the launch of the IS the organisation should be able to digitise, centralise, manage and archive all information and documents and generally to get more effective in its operation. These things can be described as secondary objectives of this thesis and its potential contributions. Also the selected method of acquisition of the IS gives instructions on how to solve this problem in similar non-profit organisations, which is another contribution of this thesis.
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Do price promotions influence the demand for food products?
Koudelka, Tomáš ; Mičúch, Marek (advisor) ; Koubek, Ivo (referee)
The aim of this thesis is to determine the influence of leaflet actions on the marketability of food products. In theoretical part I describe the motives which lead shops in the process of choosing the particular product promoted in the leaflet action. In the empirical part parameters influencing the purchased quantity of goods in the action period are estimated by the ordinary least square method based on real sales data. This estimate is further precised by the heteroskedasticity corrected model. The final results show the rational behaviour of customers purchasing the products mainly during the leaflet actions for better prices.
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Tření na rubu konstrukce při aktivním tlaku - Experiment E2
Koudelka, Petr ; Koudelka, T.
The paper presents a part of verification of an existence of supposed phenomena by physical modelling of lateral (earth) pressure. .Initial supposed theoretical base of the General Lateral Pressure Theory in 1996 was built according to numerical knowledge of the time. There was developed an experimental stand with 5 bi-component pressure sensors and made the experiment E2 with active pressure.
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