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Waste building materials to base layers of the pavements
Žďára, Zbyněk ; Hýzl, Petr (referee) ; Stehlík, Dušan (advisor)
This bachelor thesis is divided into two parts, theoretical and practical. In the theoretical part, there is processed information about recycled construction waste and their possible use in road construction in the form of research. The individual chapters deal with the description of these materials, their production, their use in base layers of the pavement and attention is also paid to their problematic features and foreign experience. In the practical part, laboratory samples of recycled asphalt pavement and recycled aggregates were tested. The main purpose was to find out if it was possible to use a mixture of recycled asphalt pavement and recycled aggregates in the base layers of the pavement with a low traffic load. Another purpose was to compare the properties of mixtures with different content of both recycled materials and to see how the bearing capacity of these mixtures changes when an elevated temperature is applied to them.
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Mixed builging recycled material for pavement subgrades
Masař, Daniel ; Hýzl, Petr (referee) ; Stehlík, Dušan (advisor)
The Bachelor thesis is focused on the use of mixed building recycled material for pavement subgrades. The theoretical part describes the production and usability of recycled building materials and also the economic evaluation against commonly used natural materials. The main point of the theoretical part is the use of mixed recycled material in the subsoil of roads with increased attention to the use in the active zone of road. It also describes laboratory tests that are important for evaluating the qualities of recycled materials and problematic qualities that can affect the life of a construction work. In a separate chapter, it presents foreign experience with the use of recycled building materials for building transport structures. The practical part verifies the suitability of mixed building recycled material to the active zone of road by tests of the California bearing ratio, soil freezing rate and crushing resistance by Los Angeles.
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Unbound mixtures to the pavement base layers
Žůrek, Jakub ; Hýzl, Petr (referee) ; Stehlík, Dušan (advisor)
The subject of this bachelor’s thesis is the possibility of using alternative materials in base road layers. Specifically It‘s about different granular material from mines (fraction 0/22) and recyclate, the possibility of their their classification within the used base layers and assessment of their suitability for specific structural layer. The thesis subject is also assessment of suitability of laboratory tests currently used in the Czech Republic and is trying to deal with the question whether these tests are ideal or not. The theoretical part summarizes the currently used base layers, their properties, technology of their implementation and It explains the current testing system. The aim of the thesis is to define mechanical properties of the examined materials, compare them and evaluate them.
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Asphalt recyclated material for base and subbase layers of pavements
Winterová, Karin ; Hýzl, Petr (referee) ; Stehlík, Dušan (advisor)
This bachelor thesis reviews the use of asphalt recyclated material and its application in the base and subbase layers of pavements. In addition to domestic knowledge, a foreign experience with the use of tested material and also covers currently used technologies for the processing of asphalt recyclates into the constructional layers of roads.is presented. Possibile application of asphalt recyclates in the unblemished and coated subbase layer of the road are verified in the practical part
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Improvement of soils for pavement subgrade
Šefránková, Radka ; Pácha, Petr (referee) ; Stehlík, Dušan (advisor)
The bachelor thesis deals with improvement of unsuitable soils for pavement subgrade. The theoretical part describes technologies of modification and materials employed for improving soils in our country and abroad. The main target of the practical part is observing bearing capacity of unimproved and improved soils and comparing the results.
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The frost susceptibility of unbound mixtures to pavements
Surá, Kateřina ; Zajíček, Jan (referee) ; Stehlík, Dušan (advisor)
The thesis is focused on the analysis of the theoretical part of the unbound mixtures, their implementation and compliance. Further deals with determining the extent frost susceptibility direct and indirect method in the Czech Republic and the Member States of the European Union. The practical part is focused on the performance of tests on selected samples of unbound mixtures for which was gradually increased the content of fine particles and that direct and indirect method of determining the rate of frost susceptibility and also the evaluation of direct methods of particular customized way, which does not impose the appropriate standard. At the conclusion of the work is carried out an evaluation of the samples and comparison of the different methods with each other.
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Frost susceptibility of soils and waste materials to pavement subgrade
Sokolová, Veronika ; Mondschein,, Petr (referee) ; Stehlík, Dušan (advisor)
Destruction of road constructions due to the frost is in locations with temperatures under the zero a problem which leads to permanent deformation. The theoretical part of this thesis deals with the freezing process of the pavement and its subgrade. It presents methods for determining the rate of frost susceptibility in both the Czech Republic and abroad. Describes the materials used in the subgrade of roads and their suitability in terms of frost susceptibility. The thesis closely examines the fly-ashes, their properties and possibilities of using in the construction industry. The practical part of the thesis focuses on the performance of direct laboratory frost heave tests, immediate bearing index tests, California bearing ratio tests and cyclic load triaxial tests to determine the modulus of elasticity. Tests are carried out on the soil, the soil mixtures with certain percentages of fly ash from different sources at the same soil treated with lime. Then the results are compared and dependence between the measured characteristics of materials is created.
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The frost susceptibility of the soils and materials to subgrade of the pavements
Mašek, Jakub ; Zajíček, Jan (referee) ; Stehlík, Dušan (advisor)
This diploma thesis deals with the issue of the determination of the frost susceptibility of soils in the subgrades of road structures. The theoretical part compares the ways of testing the frost susceptibility in the Czech Republic and other selected countries of the European Union. Furthermore, it also deals with the development of the frost susceptibility index in the Czech Republic. The empirical part focuses on the laboratory testing of the frost susceptibility of the given sample of soil by the direct frost heave method. Moreover, it also deals with the simulation of penetration of frost by the subgrade and the possibility of shortening the length of the freezing during the direct testing the frost susceptibility.
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The frost susceptibility of soils and materials for subgrade of pavements
Puda, Adam ; Pácha, Petr (referee) ; Stehlík, Dušan (advisor)
The bachelor thesis deals with the theoretical part of the deformation caused by frost action, but primarily frost heave, their gradual development and factors affecting their final formation. Furthermore, different ways of measuring the frost susceptibility in the Czech Republic and their comparison. Introduction to the different methods of measuring frost susceptibility in selected countries within the European Union. The practical part is focused on the process of frost heave samples with and without thermal insulation material.
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