|
|
High volume fly ash concrete
Kučera, Jakub ; Sokol, Pavel (referee) ; Hela, Rudolf (advisor)
Bachelor thesis consist of two parts. The aim of teoretical part is to explore possibilities of usage and properties of high volume fly ash concrete with 40 – 70 % cement replacement. To make an overview of development of strength, durability in various environments, reduction of heat evolution etc. The aim of the experimental part is to compare properties of various class concretes with various amount of fly ash.
|
|
|
The influence of the preparation and editing of test specimens for testing the durability of concrete and concrete products
Šťastný, Antonín ; Brožovský, Jiří (referee) ; Hubáček, Adam (advisor)
This bachelor’s thesis examines the influence of the preparation and editing of test specimens for testing the durability of concrete and concrete products. In particular it monitors the effect of surface treatment and storage of test samples on durability of concrete. The theoretical part describes the mechanism of damage to the samples exposed to salt scaling. It further describes the test methods, which identifies and describes the durability of concrete and concrete products according to the test standards in force in the Czech Republic. Three types of concerete was proposed and mixed in the experimental part of this work. They were using the same raw materials and were differed in degree of aeration. Samples were made from each types of concrete. Thay had different surface treatment, various degrese of saturation before the salt scaling test and the samples were compared with each other.
|
|
|
Possibilities of increasing the durability of shotcrete
Merta, Michael ; Dufka,, Amos (referee) ; Hubáček, Adam (advisor)
This thesis deals with an issue of shotcrete and possibilities of increasing its durability. Theoretical part of the thesis is conceived in a form of summary of current knowledge concerning shotcrete. The emphasis is mainly on the possibilities of using shotcrete in exposure classes XA and XF. The experimental part focuses on laboratory testing of shotcrete. Waterproofness of shotcrete, its surface resistance to water and chemical de-icing agents was tested with regard to a development of its compresive strength during maturation.
|
|
|
Effect of fly ash on the durability of concrete
Vašek, Tomáš ; Kulísek, Karel (referee) ; Hela, Rudolf (advisor)
Bachelor thesis consists of two parts, theoretical and practical. In the theoretical section provides basic information on the manufacture of fly ash, development and principle of High Volume Fly Ash Concrete and view on this type of concrete in the Czech Republic. Listed below are the world´s knowledge of conduct of durability and potential problems that can act on them. The theoretical part ends with summary of the utilization of fly ash in various areas of construction industry. In the practical part compares the characteristics of each recipe containing fly ash with recipe containing only Portland cement. Finally, is evaluation of results of practical part and influence on the durability of fly ash concrete.
|
|
|
A survey of the mortuary in Ostrovec at Velečín
Slížková, Zuzana ; Frankeová, Dita ; Petráňová, Veronika ; Zeman, Antonín ; Hauková, Petra ; Mácová, Petra ; Niedoba, Krzysztof ; Viani, Alberto ; Pérez-Estébanez, Marta ; Zíma, Pavel ; Janotová, Dana
This report presents the results of a survey of the mortuary object in Ostrovec by Velečín which has been selected for testing the samples of plaster developed in the project MK NAKI DF11P01OVV008 (High-performance and compatible lime mortars for extreme application in restoration, repair and preventive maintenance of architectural heritage). The survey focuses on the plinth of the morgue, where the plaster repeatedly freezes and falls off after one winter season. Causes of failure of the repairs plasters and material composition of were examined by following techniques:x-ray diffraction (XRD), thermal analysis (TG), optic and electron microscopy, FTIR and Raman spectroscopy.
|
|
| |
|
|
Planned Obsolescence
Nejedlá, Jana ; Pešek, Ondřej (advisor) ; Štědroň, Bohumír (referee)
Planned obsolescence is the term used to describe incentives of companies to make durable goods faster obsolete. The aim of the study is to make a big picture and real situation about planned obsolescence practising and consumer disposal behaviour. First part addresses the theoretical background and provides comprehensive overview through different aspects of the good's durability issue and planned obsolescence characteristics and influences. Second part in further reference to the information provided in theoretical part examines the situation of specific durable products - laptops. From survey's results on consumer attitudes towards durability of laptops and real case study on Apple Inc. and its reliance to planned obsolescence, recommendations to the more sustainable consumption of consumer electronics are presented.
|
|
|
The system of quality assessment of meat as feedstock for the production of durable and fermented salamis
PIRTYÁKOVÁ, Lucie
In my diploma thesis I recommend operating system of the choice of feedstock for the production of durable and fermented salamis. I Choose raw materials for the production of durable salamis according to established criteria for evaluating quality of raw materials and influences, which are affected. Next, I examined the possibilities of evaluation of quality standards and for the production technology of salami Vysočina I put together HACCP plan. In conclusion, I describe the current market and the consumption of raw materials for meat production in the Czech and the entire European Union
|
|
|
SBRA Method and serviceability of structures
Valihrach, J. ; Marek, Pavel
This paper is intended to summarize application of the fully probabilistic Simulation-Based Reliability Assessment method (SBRA) on serviceability assessment in scope of proposed integrated system (SBRA guideline) of reliability assessment of structures. Also, the aim of this paper is to contribute to ongoing debate about probabilistic design and assessment of structures, and to its results integration into future fully probabilistic generation of design codes.
|
|
|
Rules of the game of the SBRA method and codes on structural reliability assessment
Marek, Pavel ; Guštar, M.
Already for twenty years deliberation has been focussed to the improvement and application of the probabilistic method known as SBRA (Simulation Based Reliability Assessment), based on development of the ever-increasing potential of computer technology. At present this progress in computer technology requires the formulation of “rules of the game“ for the SBRA method and guidelines which will serve as a draft for a new class of codes for the design of structures and for assessment of their reliability which will ensure safety, serviceability and durability. In the future, the SBRA method may also serve as a steering component in the so called integrated design.
|
guest ::
