|
|
Comparison of microstructure of standard and modified fly ash autoclaved aerated concrete
Fleischhacker, Ján ; Kulísek, Karel (referee) ; Drochytka, Rostislav (advisor)
Nowadays, the amount of produced fly ash and fluidized ash is huge, so it is important to find ways of its proper use.Significant influence in field of fly ash consumption is production of autoclaved aerated concrete. Most important factor in production is properties of raw materials such as mineralogical and chemical composition. The study of raw materials is important to understand the mechanism of hydratation, tobermorite formation and mineralogy of final product. In present study, we investigate influence of raw materials to mineralogy of autoclaved aerated concrete, significantly to influence of fluidized ash on quality of autoclaved aerated concrete. Closure of study is design of the methodology, specialized in field of bachelor’s thesis study.
|
|
|
Examination of the activity and possibility verification ability of various types of corrosion inhibitors
Kroča, Michal ; Švehla, Vladimír (referee) ; Drochytka, Rostislav (advisor)
The aim of the work is to describe the degradation of concrete structures from the perspective of corrosion of steel reinforcement. The basis of a detailed survey and analysis of additives containing corrosion inhibitors, designed to improve the concrete matrix and increased protection of steel reinforcement. The essential part is a summary of the detection methods designed to verify the presence of inhibitors in reinforced concrete (direct method) or anti - corrosion effect on steel reinforcement (indirect method). Subsequently, to compare the available products in the market based on their characteristics and parameters, including prices and environmental point of view. From the data obtained is drawn optimization calculation, the output of which is to determine nevhodnějšího product for protection of steel reinforcement embedded in concrete structures, especially at a dosage rate specified by the manufacturer.
|
|
|
Rehabilitation technology of embankment dams by using suitable types of waste
Michalčíková, Magdaléna ; Kulísek, Karel (referee) ; Drochytka, Rostislav (advisor)
The subject of this work is to find an optimal technology for repairing existing embankment dams with emphasis on simplicity and ecological scalability. Next, secondary energy and waste materials will be evaluated as a partial replacement of a quality montmorillonitic clay. The aim of this will be to maximize the use of these waste materials. In the end a selection of materials for the locality will be made. The use of appropriate types of waste for repairs of embankment dams with clay based grouting compound technology has a great potential, especially with those dams that are not fulfilling their function due to their age.
|
|
|
Draft Curtains new Ways of Waterproofing and Assessment Methodologies
Miková, Lenka ; Dohnálek,, Pavel (referee) ; Drochytka, Rostislav (advisor)
Gel injections are progressive and more and more widespread technology for wet masonry rehabilitation, which finds its use due to working simplicity, and final effectiveness. In their application is not necessary to use strong destructive methods on construction and functionality of the final waterproofing is at a very high level. But the actual application of these technologies has technological limitations, and therefore arose in construction practice need of research new gel infusion with additional parameters and added functionality. Given the lack of a uniform methodology for such complex research process, the main aim of this thesis is proposal for methodological process for the research of new gel materials, and their later efficiency verification in the construction practice.
|
|
| |
|
|
New Additional Industrial Insulation Systems for High Temperatures
Pániková, Juliana ; Kulísek, Karel (referee) ; Drochytka, Rostislav (advisor)
This bachelor´s thesis deals with the theoretical suggestion for external thermal insulation composite system with higher heat resistance. Here are briefly described appropriately selected materials with insulating properties and the most commonly used technology of prefabricated components. The practical part deals with theoretical calculations of heat transmission and suggestions for possible compositions including anchoring system and surface treatments.
|
|
| |
|
|
Development of different types of fly ash autoclaved aerated concrete
Bednárik, Vít ; Kulísek,, Karel (referee) ; Drochytka, Rostislav (advisor)
This bachelor´s thesis deals with the current technologies of production and raw materials used in the production of fly ash autoclaved aerated concrete. The choice of suitable materials is an important prerequisite for achieving the desired properties of the finished product. Fly ash autoclaved aerated concrete has become one of the options, how to use fly ash, produced as a secondary raw material in the combustion of coal in heating power plants. This work deals with the comparison the physico - chemical properties of the fly ash in the Czech Republic and the subsequent optimization of the composition of the raw mix for the production of fly ash autoclaved aerated concrete with the maximum use of alternative raw materials.
|
|
|
The design of ETICS using insulation core made of aerated concrete
Machala, David ; Zach,, Jiří (referee) ; Drochytka, Rostislav (advisor)
This thesis deals with theoretical suggestions of contact self-supporting insulation system with an insulating core made of porous concrete. The text prepared knowledge about ETICS system, the properties of porous concrete are thoroughly described, including the history and the most often used technology for production of porous concrete. The conclusion is made by comparison of economical and thermal insulation criteria using optimizing calculation and the applicability criteria of proposed ETICS are stated.
|
|
| |
guest ::
