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Recycled aggregate to pavement constructions of roads
Antošová, Klára ; Mondschein,, Petr (referee) ; Stehlík, Dušan (advisor)
The diploma thesis deals with using of recycled aggregate of concrete for base layers of pavement. The work is divided into practical and theoretical part. The theoretical part deals with basic concepts of construction and demolition waste, production, development and management of this waste in the Czech Republic. It also focuses on the principle of recycling and the use of recycled concrete in the Czech Republic and abroad. The practical part of the thesis deals with laboratory testing and assessment of recycled aggregates in bound, unbound and grouted courses layers of the base layers of roads.
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Usage of recycled materials to asphalt mixtures
Zítka, Patrik ; Kašpar, Jiří (referee) ; Hýzl, Petr (advisor)
This thesis deals with the R-material use in asphalt mixtures. In the theoretical part, different kinds of flexible pavement recycling and ways of adding R-material into asphalt mixtures are discussed. The practical part deals with asphalt layers design and manufacture, specifically for binder course ACL 16+. R-material content in the blends is 0%, 20%, 25% and 30%. EVOTHERM MA3 rejuvenator is used as additive for softening of R-material. Various mixtures are compared based on tests - resistance to permanent deformation, resistance to the effects of water and low temperature properties.
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The issue of increasing the proportion of reclaimed asphalt in asphalt mixtures
Urbanec, Luboš ; Mondschein,, Petr (referee) ; Hýzl, Petr (advisor)
The subject of this Ing. thesis is asphalt mixture with increasing RAP (Reclaimed Asphalt Pavement). The theoretical part defines the terms of recycling and RAP and types of recycling. The practical part is devoted to the production and testing of asphalt mixtures with different volume RAP. The proposed asphalt mixture is asphalt concrete for base layer ACP22 +. Content of RAP in mixtures is 0%, 30%, 50% and 70%. As a special additive to soften the asphalt from RAP is used ingredient STORFLUX. For each mixture are established modulus stiffness of asphalt mixture and determined fatigue characteristics of asphalt mixture. The identified properties are compared for the different representation of RAP.
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Reducing the operating temperature of the production and laying of asphalt mixtures
Komenda, Radek ; Valentin,, Jan (referee) ; Hýzl, Petr (advisor)
The subject of this thesis is the issue of reduction of the operating temperatures in the production and laying asphalt mixtures with a more specific focus on influencing the functional properties of these mixtures, especially low-temperature parameters. The thesis is notionally divided into two parts. The first part refers to the low-temperature asphalt mixtures and the second part pays the attention to asphalt mixtures with an added R-material. For production of asphalt mixtures in the first part of thesis were used five additives and for the second part were used a total of four different asphalt mixtures which differs in the participation of added R-material. Both parts are divided into a theoretical part, which discusses the existing experience, the use of these mixtures and the practical part, which analyses in detail the tested mixture ( the composition and preparation of tested specimens ) and deals with the result of laboratory test. In particular, it is a test of asphalt mixture resistance against the formation of frost cracks according to ČSN EN 12697-46 and by comparing the individual mixtures in comparison with the reference sample and among each other.
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Analysis of utilization of waste generated in the production of cement-bonded particleboards
Melo, Michal ; Vacula, Miroslav (referee) ; Bydžovský, Jiří (advisor)
The content of this diploma thesis is to explore the possibility of utilization of wastes generated in the production of cement-bonded particleboards in terms of their application as secondary raw materials back into the production. At first an attention was focused on a fine-grained waste containing wood particles with cement matrix produced during the final adjustment of boards. Further, fly ash generated from the combustion of wood chips in the biomass boiler is assessed. In the theoretical part the different types of waste generated in the production of cement-bonded particleboards are characterized, including their methods of creation, production, use or disposal of the current and other proposals for utilization in the future. The research papers dealing with applications of various wastes in the production of cement composites with organic fibers were also studied. In the experimental part of the thesis the characteristics of each type of waste generated in the production of cement-bonded particleboards are evaluated using laboratory analyses and their pretreatment methods for another use are designed. Subsequently performed the laboratory verification capabilities of secondary raw materials from wastes in cement-bonded particleboards identifying and evaluating basic physico–mechanical characteristics of boards with modified composition.
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Change in the durability of concrete made of recycled concrete by alternative addition of ceramic admixtures
Stavař, Tomáš ; Hoffmann, Oldřich (referee) ; Stehlík, Michal (advisor)
The master thesis dealing with problematic about durability of concrete, with use of recycled concrete and addition of silica additions. Predominant for resistance of concrete constructions is surface layer, through which aggressive gasses and liquids penetrate from surrounding environment. The most important indicator of concrete durability is ability of surface layer transmissions of aggressive substants. In experimental part will be defined the actual state of surface layer by normal testing methods. The transmissions of surface layer will be tested on concrete cubes. Tests for transmissions of air (method TORRENT), of water (method ISAT), of acid gases (dept of carbonation by quick test in 98% CO2) will be carried out and also strength tests. Assessment of positive or negative influence of additions and amount of cement on durability and mechanical properties of concrete will be discussed in conclusion.
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Development of multilayer polymer floor systems
Tesař, Filip ; Vyhnánek, Miroslav (referee) ; Petránek, Vít (advisor)
Multilayer polymer flooring systems belongs to widespread materials for industrial constructions and also for public constructions. These are mostly two-components polymeric materials based on epoxy. The main aim of my thesis is to make list of requirements for multilayer polymer flooring system and utilization of waste materials as fillers in polymer epoxy. Then use this knowledge for development of multilayer polymer flooring system and propose the new recipe and primary test´s for this material.
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Development of Resistant Coating Systems Based on Polymer Binders
Voráčová, Veronika ; Vyhnánek, Miroslav (referee) ; Petránek, Vít (advisor)
The aim of the thesis is to propose the use of waste materials as filler for the selected coating systems used for chemical protection of concrete surfaces.The used filler could not affect the existing binder of the coating system. Research was conducted using two materials N141 and N 121. The waste material was chosen by his chemical and physical properties. Between suitable materials belongs slag, fly ash, foundry sand and glass waste. The selection based on Lena Chemical s.r.o companies request was selected glass waste. The practical part includes examination as fillers, and the corresponding tests for coating systems with pre-used filler. Finally, the assessment of the suitability of the materials used.
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