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Diagnosis of connected concrete layers by pulse echo method
Lokos, Ondřej ; Kocáb, Dalibor (referee) ; Cikrle, Petr (advisor)
This study deals with the measurement of the adhesion of the upper concrete layer to the underlying layer in a truck parking lot. The pulse echo method is used to detect de-laminations of whitetopping. The aim of the work is to verify the efficiency of this meth-od and its accuracy in measuring the adhesion of the concrete layer. The results of the measurements are compared with the results of the measurements on the test block. This study contributes to a better understanding of the coherence of the concrete layers and may help in improving the design and maintenance of truck parking lots.
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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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Recycling of asphalt mixtures with standard amount of RAP
Staňková, Michaela ; Koudelka, Tomáš (referee) ; Varaus, Michal (advisor)
The diploma thesis deals with the design of an asphalt mixture for an abrasive layer with a standard R-material content (20 %) without the use of other softening additives, while the properties of the aged asphalt binder in the mixture were compensated by dosing "softer binder 70/100". Asphalt mixtures type ACO 11+ are designed to meet the requirements ČSN 73 6121: 2019. The aim of the work is to verify the expected properties of the asphalt mixture performed functional and empirical tests according to the standards for asphalt mixtures of the ČSN EN 12697 series.
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The design of the repair of the asphaltic lining of embankment dam
Dostál, Kryštof ; Rudolfová, Mirka (referee) ; Říha, Jaromír (advisor)
This diploma thesis deals with the design of repairs to the asphalt concrete facing of the upper reservoir of the pump-storage power station Dlouhé Strána. The first part summarizes the knowledge about asphalt concrete facings, experience from foreign constructions and a description of the damage on this hydraulic structure. The second part defines the variants of repairs and the selection of the most suitable on the basis of decision analysis.
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Warm Mix Asphalt Using Technology of Foam Bitumen
Machel, Ondřej
Nowadays, more and more attention is paid to the environment protection. The issues of the environment protection are obviously related to road engineering as well. Asphalt pavements are used in the majority of road constructions. When producing these mixtures, it´s necessary to reach high temperatures, which is energetically demanding and at the same time there are impacts on the environment. In order to reduce the negative effects as much as possible, there are efforts to reduce working temperatures while keeping the properties of the mixtures. The result is the so–called Warm Mix Asphalt – WMA. The aim of this article is to introduce basic methods for reducing working temperatures with a focus on the foam bitumen technology and its use in the Czech Republic.
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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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Usage of polymer modified bitumens and rejuvenators in asphalt mixtures
Maláník, Stanislav ; Hýzl, Petr (referee) ; Dašek, Ondřej (advisor)
Diploma thesis deals with the influence of various dosing of Reclaimed asphalt pavement (RAP) using modified bitumen on the properties of asphalt concrete (ACO 11+) of cemented by polymer modified bitumen, while a rejuvenating agents are added into asphalt mixtures. The theoretical part of the thesis summarizes the basic knowledge of pavement recycling, polymer modified bitumens and their reuse in asphalt mixtures. The practical part deals with laboratory tests of ACO 11+ mixtures with the RAP proportion of 0 % to 50 %. The asphalt mixtures compared are evaluated by means of the Thermal Stress Restrained Specimen Test (TSRST) and Stiffness test. The results obtained within the diploma thesis can approximate the issue of recycling of asphalt mixtures with polymer modified bitumens.
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Construction Project for Station of Fire and Rescue Services in Jaroměř
Nývlt, Josef ; Liška, Pavel (referee) ; Nečasová, Barbora (advisor)
The objective of this diploma thesis is the processing of the construction technology design as a part of the preparation and implementation of the fire station in Jaroměř. It is a new construction of the main building, which is supplemented by other objects and engineering buildings. The thesis deals with complex design of the implementation of the construction and then focuses in more detail on the installation of the supporting frame structure, which consists of reinforced concrete prefabricated elements. The whole project also includes a technical report on the construction technology project, a study of the implementation of the main technological stages of the main building, solutions for transport routes for construction supply, construction site design, machine set design, technological regulations with assembly diagrams, control and test plan, time plans and balance of resource needs, itemized budget and occupational safety and health plan. The diploma thesis is supplemented by a specialized part dealing with the reconstruction of the area road with a bituminous cover and the implementation of other paved areas within the area of the fire station.
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Design of low-temperature asphalt mixtures
Líšková, Jana ; Zajíček, Jan (referee) ; Varaus, Michal (advisor)
In this diplomatic work, the issue of low-temperature asphalts and binders for asphalt mixtures is solved. Diploma work is divided into two parts, theoretical and practical. In the theoretical part of diploma work, the purpose was to process a overview of technologies that allow the reduction of working temperature in the production and laying of asphalt mixtures. The purpose of the practical part was to comparison the functional parameters of two types of asphalt mixtures made in two variants, with the common asphalt binder and adding licomont into asphalt. Attention was given to stiffness, wheel drive tests and low temperature parameters.
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