National Repository of Grey Literature 313 records found  1 - 10nextend  jump to record: Search took 0.02 seconds. 
Optimization of recycled concrete materials from precast concrete elements and their characteristics for building information model
Venkrbec, Václav ; Mésároš,, Peter (referee) ; Šuhajda, Karel (referee) ; Henková, Svatava (advisor)
The dissertation thesis deals with the use of recycled concrete aggregates obtained from deconstructed parts of a precast panels’ apartment building. Furthermore, the work presents an optimization supplier-logistics algorithm to achieve a wider application of recycled aggregate concrete (RAC) in structural concrete in a new building. As part of the newly developed optimization algorithm of ready-mixed concrete suppliers, non-graphical data from the building information model (BIM) were intensively used. The work also addresses the transfer of data from and back to the information model and the definition of characteristics needed to optimize the entire process. At the theoretical level, the work deals with a comprehensive literature review of the above-mentioned fields. The experimental part of the work is focused on materials research carried out in order to verify the suitability of a particular type of RAC for structural use. The work introduces the procedures and test results of two types of recycled aggregates and then presents a range of recycled concrete recipes with partial replacement of aggregates for RCAs, obtained from prefabricated panels of high-rise buildings. The gained test results show the technical suitability of the tested RCA sources for producing medium-strength structural RAC. A significant part of the analytically oriented experimental part of the work is the logistic optimization scenario with its own matrix-based discrete algorithm and economic graphical evaluation. The case study examines the relevance of the proposed algorithm on a real scenario, namely the construction of the scientific technology institute CEITEC in Brno. Furthermore, the work summarizes the issue of BIM and presents a methodology for handling non-graphical information of the building model to define the characteristics of recycled concrete in buildings. The conclusions are addressed both for practice and for the development of scientific disciplines. The work provides
Risk Assessment of Textile Waste Management
Šindlerová, Vanesa ; Vymazal, Tomáš (referee) ; Hrabová, Kristýna (advisor)
This thesis deals with environmental risks arising from textile waste management. The introduction describes the context of textile problematics and maps the current situation of textile waste management. The main goal of this thesis is to determinate the environmental risks of low percentage of recycling. Recycling is one way of dealing with textile that mitigates the impact on the environment. For the evaluation of the causes and consequences of the researched problem are used Bow-tie analysis and Ishikawa’s diagram. The results of the work bring environmental risks resulting from the application of those selected methods. Part of the thesis is a questionnaire that evaluates the individual’s attitude to textiles. Results of the questionnaire reveals that not needed textiles are perceived as risk to the environment. At the same time, consumer behavior does not correspond with efforts to mitigate the identified impacts.
Screenig shovel for construction and demolition waste
Běluša, Jiří ; Michele, Jiří (referee) ; Škopán, Miroslav (advisor)
This thesis contains design of a screening bucket used as an attachment for an excavator. Research section consists of construction and demolition waste sorting process, recycling options and design examples of screening buckets. Next part of the thesis includes own design of a screening bucket, calculations and finite element analysis using a computer program.
Study of the ecological impact of production, operation and disposal of various types of cars
Los, Marek ; Máca, Josef (referee) ; Jaššo, Kamil (advisor)
The life cycle of a car includes three basic phases: production, operation and end-of-life. All these phases can potentially produce emissions that have a direct impact on the environment. However, different types of cars may produce different amounts of emissions during the life cycle phases, depending not only on the type of propulsion but also on local factors such as the emission factor of the energy mix. The results of the research showed that the potential environmental benefit of lower GHG emissions of battery electric vehicles depends primarily on the emission factor of the energy mix. In countries such as Poland, where the majority of electricity produced is generated by burning coal and lignite, the life cycle environmental performance of battery cars will be higher than that of combustion cars. Conversely, in countries with a favourable energy mix, such as Sweden, the potential to reduce transport emissions by replacing the existing car fleet with electric cars is significant. Furthermore, four reference vehicles are proposed for which life cycle GHG emissions are calculated using the proposed calculation method using local emission factors.
Study of the influence of polyethylene terephthalate recycling on the quality of the resulting recyclate
Mach, Jakub ; Řezáčová, Veronika (referee) ; Kučerík, Jiří (advisor)
Plastics and recycling of plastics is a frequently discussed topic. The output of sythetic polymers is rising exponentially every year. In accordance with the sustainable development, development of effective recycling techniques enabling to process these huge amounts of waste and convert it back into useful material is essential. The aim of this work was to study qualitative effects of production methods, various types of recycling processes and degree of degradation of polyenthylene terephtalate on results of differential scanning calorimetry (DSC) analysis. In experimental part, analyzes of 62 regranulates of recycled PET were performed. The samples from various manufacturers differed (manufacturers use different technologies) in terms of mechanical and physico-chemical properties or additives. The results confirmed that the properties of recycled PET have an impact on thermophysical properties recorded using DSC. A simple DSC run enables distinguishing a number of fundamental qualitative properties of PET, in particular crystallinity, melting point and enthalpy, temperature and enthalpy of crystallization and glass transition temperature and in this work we show that their mutual relationship enables to estimate the quality of recycled material and the possibilities of its further use.
Chemical composition of photovoltaic panels
Koudelová, Marta ; Šebek, Ondřej (advisor) ; Tejnecký, Václav (referee)
The bachelor's thesis is focused on the issue of photovoltaic cells and panels. The literature search was formed from selected available literature with the purpose to characterize different types of the crystalline silicon photovoltaic cells and thin-films photovoltaic cells and describe the application of photovoltaic cells in the world and in the Czech Republic. In the next part of this thesis is a summary of current knowledge about recycling of photovoltaic cells and other utilization of layers and their possible impact on the environment. The practical part of the thesis deals with selected samples of PV panels. A few samples of photovoltaic panels were taken for chemical analyses. Chemical analyses are performed of the five samples of the photovoltaic panels. The results of chemical analyses were compared with acquired data from the literature. The results of the multielementary analysis of selected samples was that the photovoltaic panels contain a risk elements (e. g. As, Cd, Sb, Mo). The PV panels also contain economics utilizable elements (Ag). Content of silicon is up to 78,18 % SiO2. Key words Photovoltaic panel, photovoltaic cell, chemical analysis, risk elements, recycling
WASH complex and its interactome in human pathology
Pácalt, Ondřej ; Libusová, Lenka (advisor) ; Drobná Krejčí, Eliška (referee)
Efficient transport of cargo to its correct destination is required for the proper functioning of eukaryotic cells. Vesicular trafficking is one of the important means of intracellular transport. Impairment of this process often leads to serious pathologies. Sorting and recycling is the crucial part of vesicular trafficking as it enhances its efficiency. The WASH complex has a key role in the regulation of branched actin patches formation. If this occurs on the membrane of endosomes, then it affects sorting, recycling and cargo trafficking. Mutations in the WASH complex or its interacting partners cause diseases such as hereditary spastic paraplegia, Parkinson disease or light intellectual disability. Despite certain advance in the understanding of above-mentioned pathologies, mechanism of the pathogenesis is still elusive. Research in this field can reveal basic molecular mechanisms responsible for the complexity of cargo sorting, recycling and trafficking and thus provide better opportunities for treatment of affected individuals.
Paper, plastics and metals recycling
Kaireshev, Ruslan ; Benešová, Libuše (advisor) ; Doležalová, Markéta (referee)
The latest trends in the field of waste management and recycling show an annual increase in the proportion of municipal waste, especially the municipal solid waste folder, in total waste production in the Czech Republic and in the world. The constant pressure specified by latest amends in the waste and packaging legislation, regulation by the European Union directives on reducing the amount of waste deposited in landfills, pushing the waste management system to increase the rate of recycling of waste, especially of individual commodities such as paper, plastic, metal and cartons. Recycling has its advantages and disadvantages, the current challenge for expert public is to find ways of waste management in the future. Currently, expert public is interested not only with solution of recycling problems itself, but with possibilities of alternative forms of waste recovery. In 2010, thanks to the recycling of paper, plastics, glass and metals saved 23.3 million MJ of energy that may not be produced, which represents one percent of the total energy consumption of the Czech Republic. Recycling reduced the overall green gas emissions by less than one percent, corresponding to 0.96 million tonnes of CO2 equivalent (EKO-KOM). Key words : recycling, paper, plastic, metals
The study of recycling non-ferrous metals in the EU and the Czech Republic
Rákosník, Vítězslav ; Benešová, Libuše (advisor) ; Tonika, Jaroslav (referee)
Overall, recycling entails both advantages and disadvantages. The major advantage is saving large amounts of energy in recycling compared to primary raw material, which is another big plus for recycling non-ferrous metals - save primary raw material. The Czech Republic and many other countries are largely dependent on imports of certain raw materials (aluminum, lead, copper, etc.) or just on mentioned recycling. Nowadays, increase in the number of electrical devices (computers, mobile telephones, tablets, etc.), is recycling of scrap metal very important, because in each device occurs a certain amount of non- ferrous metals, noble metals, which can be used again. In this work will be described commonly used non-ferrous metals (properties, inventories, recovery and recycling). Theses also deal with e-waste and its management. Key words: non-ferrous metals, recycling, utilization

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