|
|
Design of grout joint for chemical exposure using secondary raw materials
Matušková, Veronika ; Hodná, Jana (referee) ; Drochytka, Rostislav (advisor)
The aim of the bachelor’s thesis is the design of a high-quality polymeric grout joint using secondary raw materials and hazardous waste for increased chemical exposure. The main use assumed of the proposed grout joint is grouting of the cast basalt elements in building objects that are systematically exposure due to the highly aggressive chemical load. The use of input materials produced by progressive technologies should be another benefit of this grout joint to enhance the ecological aspects of the grout joint production.
|
|
|
New perspectives of fly ash applications with respect to prognosis of their sources.
Sokol, Pavel ; Bydžovský, Jiří (referee) ; Ďurica,, Tibor (referee) ; Dohnálek,, Pavel (referee) ; Drochytka, Rostislav (advisor)
Energy by-products are very interesting source of raw materials for the production of various kinds of building materials in the Czech Republic. Due to annual production of volumes and also markedly more stable quality is needed more to enforce their utilization. Work provides a unique comprehensive perspective on energy by-products in the Czech Republic. The work assesses really wide spectrum not only domestic energy by-products both from the physico-mechanical or physico-chemical parameters so from point of view of the variability of their properties, structure evaluation or environmental performance. Another important benefit is extensive and complex evaluation of the suitability of an almost complete ash production of company ČEZ for both basic types of artificial aggregates based on fly ash. The work represents a practical view of the producer of energy by-products on the comprehensive problems of power plant operation, material flows and mainly on usability of energy by-products in building materials. Illustratively are presented studies of economic and ecological advantages of substitution conventional raw materials by secondary energy products. The work deals with the issue of optimizing legislative regulations of the Czech Republic, implementation of the regulation European Parliament, for maximum simplification and streamline the process of certification of products based on energy by-products.
|
|
|
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.
|
|
|
Crystallization of coating systems based on epoxy resins.
Seidlová, Michaela ; Dohnálek,, Pavel (referee) ; Petránek, Vít (referee) ; Drochytka, Rostislav (referee) ; Bydžovský, Jiří (advisor)
Crystallisation of epoxy resins based on bisphenol A and bisphenol F is the natural property of these oligomers. However, manufacturers of paints and other systems based on these epoxy resins, strive to slow down the crystallisation process as much as possible, thereby prolonging the shelf life and improving the competitiveness of their products. The main aim of the thesis is generalisation of the factors influencing the crystallisation process of epoxy resins based on bisphenol A and bisphenol F, verifying new approaches to the possibility of influencing the crystallisation process and determining the possibility of using a certain degree of epoxy resins crystallinity based on bisphenol A and bisphenol F in the preparation and production of epoxy resinbased coating systems.
|
|
| |
|
|
Development of special protective materials for hygienically clean areas
Seják, František ; Vyhnánková, Michaela (referee) ; Drochytka, Rostislav (advisor)
The diploma thesis deals with the development of special protective materials for hygienically clean plants. The main aim of the thesis is to develop a special protective material on a polymer base usable for hygienically clean industrial plants in two quality levels (economy and premium). The first of the developed polymer protective materials is physiologically harmless (economy) – suitable for contact with eatables. Second, premium material is antibacterial, especially suitable as a floor coating in hospitals, kitchens, sanitary facilities, schools and kindergarten etc. A partial aim is the replacement currently used primary raw materials as fillers by suitable secondary raw material.
|
|
|
Development of a new self-supporting insulation system with respect to dynamic stress
Machala, David ; Frajt, Daniel (referee) ; Drochytka, Rostislav (advisor)
This diploma thesis deals with suggestion of self-supporting insulating system that can be used for objects which insulating is more or less complicated. In this thesis are theoretically processed information about insulation systems while focus is on their structure, composition and principle of operation. Further, there is theoretically designed self-supporting insulating system which is practically built after theoretically composed testing for finding its basic properties. The most appropriate process of realization is formulated at the end after evaluation of the individual tests.
|
|
| |
|
|
Possibilities of screed application on oily or wet concrete
Holomčík, Zdeněk ; Melichar, Jindřich (referee) ; Drochytka, Rostislav (advisor)
This thesis studiest he track floor system, the interaction of adhesive bonding compound with a underlaying concrete, which will be contaminated by moisture and oil. For such contaminated surface was designed polymer-cement concrete, which were subsequently tested its properties, in order to determine whether it achieves the required strength of 80 MPa uniaxial compressive and whether it can be applied to wet or oily underlaying concrete. From the results we can say that the newly proposed system achieves the specified requirements and could be applied to damp and oily surfaces.
|
|
|
Complete insulation system for high temperature using secondary raw materials
Mészárosová, Lenka ; Ďurica,, Tibor (referee) ; Kolář,, Karel (referee) ; Kulísek, Karel (referee) ; Drochytka, Rostislav (advisor)
This work deals with the development of new types of insulating materials for use in the higher temperature. The area of application of these insulation materials is especially industrial chimneys, where the exhaust gases achieves 85 to 200 °C, furthermore it is industrial boilers and furnaces with surface temperature to 500 °C. In the introduction is presented the current knowledge in the field of insulating materials in the Czech Republic and in the world. Then the work is dealing with proposal of possible raw materials and suitable formula. According to purpose of use is the work divided into two parts – high temperature insulation for simple and for complicated shapes conditions. The sub-sections are divided to different possibilities of performance. The aim was, based on the scientific expertise of other authors in the world, design a new insulation system and redound to deepening scientific knowledge in the area of lightweight materials on the silica basis and to the extension of the offer of new products in building and industrial practice.
|
guest ::
