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Behavior of concrete at high temperatures
Dvořáková, Michaela ; Bruckner,, Dipl Heinrich (referee) ; Bodnárová, Lenka (advisor)
The aim of this diploma thesis is to focus on the resistance of concrete exposed to high temperatures especially with focus of resistance against explosive spalling as well as clarifying the mode of action of various types of polypropylene fibres. The theoretical part is an introduction to the issues of explosive spalling, its mechanisms and majority influencing factors. Further description of the processes taking place in the structure of concrete under extreme thermal load, distribution and size of pores in concrete, thermal load, temperature-time curves and their applications, methods of elimination of negative behaviour of concrete exposed to thermal loading (passive and active methods), mode of action of polypropylene fibres and more is also included in the theoretical part. The main aim of experimental part is to verify the function of polypropylene fibers of various Melt Flow Indexes (MFI) and dosage. Primarily, the test samples with content of the PP-fibers are compared to the reference sample without fibers. Secondarily, the samples with standard PP-fibers (with MFI 25) with dosage 2.0 kg/m3 are compared to samples with modified PP-fiber (with MFI 2500) of dosage 0.9 kg/m3. Photogrammetric images were used for evaluation and comparison of spalled surfaces and its depth. Determination of the softening temperature and melting point of the modified and standard PP-fibers was made by using a high temperature microscope video. The second part of the experimental work was to define concrete permeability at different temperatures and pressures. Permeability was measured at temperatures of 20°C, 90°C, 150°C, 175°C, 200°C, 225°C and 250°C and at pressure of 0.2, 0.4 and 0.6 MPa.
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Assessment of Construction Company's Health from Financial View
Dvořáková, Martina ; Buchalová, Jana (referee) ; Chovancová, Jitka (advisor)
The aim of this bachelor’s thesis is an assessment of chosen construction company’s health from financial view using the methods of financial analysis. This thesis consists of two main parts. In the first part of this thesis is defined theoretical knowledge necessary to understanding this issue. In the second part, the financial analysis of the construction company has been made and subsequently, precautions are made to improve the financial and economic situation.
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Kabeltechnik Mikulov - construction and technological preparation
Dvořáková, Michaela ; Novotný, Michal (referee) ; Biely, Boris (advisor)
The subject of my diploma thesis is the technology of steel production hall and brick administrative building in the komplex of Kabeltechnik compalny in Mikulov. Thesis deals with design of construction site, construction and technological study of construction of steel manufacturing hall, items budget according to project documentation, financial and time planing, proposal of suitable mechanical assembly including lifting mechanisms, safety of work, environmental plan and monitoring and test planing.
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Financial Analysis as a tool for Assessment of Competitiveness in Construction Company
Dvořáková, Martina ; Vítková, Eva (referee) ; Chovancová, Jitka (advisor)
The aim of this diploma thesis is assessment of competitiveness in construction company with help of tools and methods of financial analysis. In the first part are defined theoretical terms related to examined problem, while attention is focused on terms construction company, competitiveness and financial analysis. In practical part are applied methods of financial analysis which are used to assess efficiency of the company. Achieved results are compared with the most important competitors on the market and also with branch. To comparing was used benchmarking diagnostic system of Ministry of Industry and Trade of the Czech Republic. As an output of this thesis are recommended tools for continuous assessment of competitiveness.
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Evaluation of the Financial Situation of a Company and Proposals for its Improvement
Dvořáková, Martina ; Oháňka, Rostislav (referee) ; Žižlavský, Ondřej (advisor)
The theme of this bachelor thesis is “The financial situation assessment of a company and suggestions for its improvement”. The thesis is focused on company’s financial analysis the sources of which it investigates together with its methods and the means of calculation of particular factors both theoretically and practically. The practical part of this thesis deals with the application of theoretical findings practically on the selected company. This financial analysis is interested in agricultural company AGROSPOL Velká Bystřice s.r.o. Firstly the actual financial situation of the company is examined and subsequently the suggestions for its improvement are proposed. The proposed measures should help to improve the functionality and operation of present financial situation.
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Application of non-destructive methods determining the quality of glued wood bondlines
Dvořáková, Martina ; Brožovský, Jiří (referee) ; Vaněrek, Jan (advisor)
The presented bachelor thesis is focused on the evaluation of timber elements by using non-destructive methods which are intended for the evaluation of glue lines. The main part of the work is focused on summarizing and the detailed description of selected non-destructive methods which can be used for glue line evaluation. There is also carried out the researche of selected scientific articles describing the application of non-destructive methods with regard to the evaluation of timber elements.
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