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Risk analysis of waterproofing systems of buildings
Vepřek, Karel ; Čech, Josef (referee) ; Novák, Jindřich (advisor)
A general overview of the waterproofing materials. Distribution waterproofing systems according to their use in construction. Listing the possible risks of defects waterproofing systems. Remediation and prevention of defects in the insulation. General summary of the risk lifecycle isolation and analysis of defects in the insulating elements on the real structure.
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The Specifics of Wood-based Constructions Valuation
Hladík, Lukáš ; Čech, Josef (referee) ; Hrdlička, Tomáš (advisor)
The diploma thesis deals with the cost valuation of wood-based constructions, whose amount is growing in the Czech Republic. The aim of this work is to elaborate a detailed itemized budget for three wooden family houses. The price shares were calculated from these budgets; next they were compared with the Regulation 441/2013 Statute book and evaluated. The budgets were also used for a calculation of a unit price, which was compared with a technical-economic index, and commented on as well. On the basis of budgets, the unit price was determined, which was compared with the technical-economic indicator and next comments. The utility properties are compared and evaluated for chosen structures. It is a diffusion-open and diffusion-closed structure. These individual variants of the constructional solution are described and compared with each other. The thesis also presents the basic specifics of wooden-based buildings valuation. In conclusion there is an assessment of adequacy of commonly used price shares of buildings and a proposal for their specification.
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RESEARCH OF HEAVY CASTING METALLURGICAL DEFECTS
Čech, Jan ; Elbel, Tomáš (referee) ; Jelínek, Petr (referee) ; Šenberger, Jaroslav (advisor)
A massive castings defects are examined in this doctoral thesis, specialise in steels passing through peritectic transformation. There are typical types of defects at massive steel castings, as contrasted to „ordinary“ internal and surface ones. For massive steel castings are typical defects under feeders like conchoidal fractures, segregations, microporesities, reoxidation products. Combination of Al and Zr is an ordinary final deoxidation of EOP and LF steel for castings in ŽĎAS a.s. foundry. The aim of Al + Zr combination was to both deep deoxidation by Al (decrease of bubbles risk) and denitrification by Zr (decrease of conchoidal fractures). This theses refute premission mentioned above and verified persisting risk of defects under massive feeders, even though Al + Zr deoxidation is used. A final deoxidation by increased amount of Al was examinated, in combination with other deoxidation agents. Castings had 11 [cm] maximal modulus, and occurence of conchoidal fracture, reoxidation products and primary austenite grain size was evaluated. A selected optimal final deoxidations (Al, Al+Ti, Al+Zr) as a result from experiment described above, were evaluated on castings with 15 [cm] maximal modulus. The result of experiment is, that is not possible to repeatedly produce massive steel casting using EOP metallurgical equipment without defects under feeders, despite of deoxidation and pouring temperature optimalization. The defect indications look like conchoidal fracture, but there are microporesity and impurities instead. Finally, castings with maximal modulus 15 [cm] were produced using so called secondary metallurgy (LF, VD). Secondary metallurgy allowed to both significant decrease of sulfur and degassing of melted metal. Only this metallurgical procedure guarantees production of heavy steel castings without typical defects under massive feeders
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System for precise dynamic measurement of bridge sensors
Čech, Jonáš ; Kolka, Zdeněk (referee) ; Kubíček, Michal (advisor)
This master’s thesis deals with design of measurement system for dynamic measurement of bridge sensors. After a short theoretical part, the own concept is introduced. System can provide sampling rate up to 250 kSa/s with 24-bit resolution. The maximum number of samples is about one and a half milion. At first, the design of analog part was made, in this phase of design the digital part is based on evaluation board with ARM Cortex-M7 and external memory. After final choice of appropriate ICs, the analog and digital part will be integrated into one PCB.
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Analysis and a Proposal of a Way of Using Brownfields in Brno
Valová, Lenka ; Vařechová, Martina (referee) ; Čech, Josef (advisor)
This thesis deals with the issue of re-use of brownfields. The main aim of the thesis is to find the best possible use of a specific brownfield in the city of Brno. The subject of this draft is a brownfield called Bývalý hotel Metropol located in the Brno district of Trnitá. The draft solution is based on analyzes of the given site and is elaborated in three possible variants which are evaluated in therm of implementation costs and expected returns.
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Urban Planning in Practice
Pravdík, Petr ; Čech, Josef (referee) ; Superatová, Alena (advisor)
The thesis brings urban planning and sustainable development. Introduces low-energy construction and its types. Closer focuses on self- sufficient house, describing his characteristics, principles, and selection of suitable location. Finally, the work addresses the legislation associated with the placement of a self-sufficient house on suitable parcel.
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Quality-evaluation tools for Al-alloy die-castings
Rozman, Jiří ; Vašíček, Richard (referee) ; Čech, Jaroslav (advisor)
The goal of this diploma thesis is to on a practical example, with use of the quality system, describe the current state of input casting inspection in Tribotec Ltd. and output casting inspection of casting suppliers in this company and to suggest a new way of output casting inspection on Tribotec Ltd. with higher quality of spoilage rate survey of supplying casting already at the input inspection stage.
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Evaluation of statistical quality control (SPC) in solving the stability of processes in die castings
Hejduk, Oldřich ; Morávková, Jitka (referee) ; Čech, Jaroslav (advisor)
The aim of the theoretical part of this thesis is to describe the system of the aluminium casting alloys, with focus on the aluminium castings used for die casting. In this part of the thesis the different methods of the quality management are described. The practical application of these methods is described in the experimental part of this thesis, in which we focus on the evaluation of the statistical quality management and the process stability of the die casting parts of the selector mechanism cover. This part of the thesis also contains suggestion for the QFD method for this cast.
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Assessment of Costs Associated with Heating a New Energy-Efficient House
Šebelová, Denisa ; Klika, Pavel (referee) ; Čech, Josef (advisor)
This diploma thesis addresses the economic assessment of the methods of heating and combinations of technologies for energy saving. The objective of this work is to assess the economical effectiveness of individual types of sources of heating. It is first necessary to established gross requirements of energy for heating, water heating, and other household operations. Based on this information, suitable sources are determined. Alternative energy sources are other aspects for consideration – controlled ventilation with heat recovery, and photovoltaic cells. The aim of the thesis is to identify which combination of those technologies is the most economically effective for the opted house. This work aims to help the investor in decision making about the technological solution of heating and power purchase. The outcome is a complex evaluation of different options for the assessed house.
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