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Adhesion of bituminous binders to aggregate
Vlk, Petr ; Hýzl, Petr (referee) ; Varaus, Michal (advisor)
In 2005 the revised European standard 12697-11:2005 [1] was introduced offering a choice of three different methods. The static method described in part B has some similarities with the replaced Swiss standard for the determination of the affinity between bitumen and aggregates [2] and Czech standard for adhesions of asfalt binder to aggregates ČSN 73 6161 [3]. The result of this study is to compare the static method described in the [3] and a draft changes by Swiss research project [4] with the current revision of the European Standard 12697-11: 2005.
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Inclined belt conveyor of aggregates
Švásta, Petr ; Jonák, Martin (referee) ; Škopán, Miroslav (advisor)
The aim of this work is the proposal inclined conveyor belt for transporting the aggregate maximum grain size up to 150mm. Functionalcalculation is made according to ISO 5048 Belt conveyor supportingrollers. The report contains a brief description of the function, use anddesign of the conveyor and its affiliates. On the basis of specifieddimensions is processed transporter function calculation, a simplifieddesign and conveyor tensioning devices. The work is accompanied bydrawings stretching equipment and conveyor assemblies.
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Use of R-material in asphalt mixtures with PMB type binder
Navrátilová, Pavlína ; Dašek, Ondřej (referee) ; Hýzl, Petr (advisor)
The diploma thesis is focused on the use of R-material in asphalt mixtures with a PMB type binder. The work is divided into a theoretical part and a practical part. The theoretical part describes the acquisition of R-material by road milling, the use of R-material, the binder used in the practical part of the work and the types of recycling. The practical part deals with the design of four types of asphalt mixtures with different content of R-material in the asphalt mixture. It also deals with the description of functional tests of asphalt mixtures and the results of these tests.
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The quality of the fill crushed aggregate to the pavements
Surá, Kateřina ; Dašek, Ondřej (referee) ; Stehlík, Dušan (advisor)
The thesis deals with the quality monitoring of fine particle aggregates used in the road construction mixtures and in the base layers of roads. In the laboratory of Institute of road structures VUT Brno was made an evaluation of the six test samples of fine and coarse aggregates to determinate a proportion of fine-grained aggregates, the limits of fluidity and shape index.
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Study of the dependence of concrete composition on the values of elasticity modules
Křížová, Klára ; Kolář,, Karel (referee) ; Adámek, Jiří (referee) ; Ďurica,, Tibor (referee) ; Hela, Rudolf (advisor)
The modulus of elasticity is one of the basic characteristics of concrete defining elastic deformation of concrete and it plays a significant role in the static design of structures. Due to current trends in concrete technology, offering a wide variability in the proposals of the composition of concrete, there are changes not only in strength characteristics but also in the modulus of elasticity of concrete. The aim of this doctoral thesis is to study the dependence of different compositions on modulus of elasticity of concrete. Design of concrete composition is prepared with respect to the use of different types of cement, mineral admixtures, types and fractions of aggregates. The work is mainly focused on the determination of static modulus of elasticity in compression with the addition of dynamic modules. In the first phase determined modulus of elasticity are compared with tabulated values according to Eurocode 2, which are derived for the specific strength class of concrete. Part of this work is the compilation of the main technological aspects of concrete which can favorably affect the modulus of elasticity.
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Portable conveyor for aggregate
Šarman, Michal ; Kašpárek, Jaroslav (referee) ; Škopán, Miroslav (advisor)
The aim of this bachelor thesis is to design portable belt conveyor for aggregate of given parameters. The introduction contains classification of conveying machines and devices. Further chapters are dealing with the actual design of the conveyor, functional description of individual parts, selection of components, and functional calculation according to ISO 5048 standard. The final chapter specifies maximum weight delivery and overall review of the machine. The work is suplemented by mechanical drawings.
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Coarse graded asphalt mixtures
Mucha, Ondřej ; Dašek, Ondřej (referee) ; Hýzl, Petr (advisor)
The bachelor’s thesis is focused on asphalt mixtures that contain coarser aggregates than currently allowed by technical regulations in the Czech Republic. The introductory part of the work describes the composition of asphalt mixtures, their division and use. Further deals with foreign experience with these types of asphalt mixtures and their use in the surrounding European countries and in the United States of America. The aim of this work is to obtain a theoretical overview of knowledge about coarse graded asphalt mixtures from foreign sources and research.
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