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Joint sealings of concrete pavements
Doseděl, Jan ; Hýzl, Petr (referee) ; Stehlík, Dušan (advisor)
The findings related to issues of joint sealings of concrete pavements are summarized in this bachelor thesis. The main part of this thesis deals with experimental testing of modified asphalt binder. This asphalt binder was tested at the beginning and at the end of fatigue. The samples of asphalt bitumen were tested by the method of ring and ball, determinativ of needle penetration, elastic recovery and resilince.
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Issue of asphalt mixtures with coarse-grained aggregates
Koblížek, Ondřej ; Hýzl, Petr (referee) ; Dašek, Ondřej (advisor)
The diploma thesis deals with the design of asphalt mixture of asphalt concrete type for base courses with maximum aggregate grain up to 32 mm and investigates the influence of the amount of asphalt binder on the properties of this mixture. The theoretical part describes the problem of aggregate shortage in the Czech Republic and the division of aggregates into various categories. In the next part, the laboratory used tests (needle penetration determination, softening point determination, compaction degree, determination of the stiffness modulus, low temperature properties and wheel tracking) are described in detail. The practical part describes the used materials, the results of the laboratory tests, their comparison and evaluation.
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Coarse-grained asphalt mixtures
Brida, Peter ; Hýzl, Petr (referee) ; Dašek, Ondřej (advisor)
The diploma thesis is focused on the comparison of the influence coarse-grained aggragate on the properties af asphalt concrete. The theoretical part describes issue of production and usage of asphalt mixtures. The practical part evaluates multiple types of asphalt mixtures and describing their properties. Stiffness by a two-point bending test, a wheel tracking test and low-temperature cracking and properties by uniaxial tension test were used to evaluate the properties of the mixtures.
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Use of RAP in coarse-grained asphalt mixtures
Teslík, Jozef ; Dašek, Ondřej (referee) ; Hýzl, Petr (advisor)
The diploma thesis examines the possibilities of using R-material in coarse-grained asphalt mixtures for ACP32 base layers. The theoretical part deals with the availability of aggregates in the Czech Republic and also solves the issue of producing asphalt mixtures with a higher content of R-material. The theoretical part also compares the use of R-materials in the Czech Republic with other countries. The practical part deals with the design, production and testing of selected mixtures. To determine the properties of the mixtures, the rolling wheel tests, TSRST and the determination of the modulus of elasticity were selected.
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Usage of reclaimed asphalt pavement in stone mastic asphalt
Coufalíková, Iva ; Katarína, Bačová (referee) ; Fišer,, Jiří (referee) ; Hýzl, Petr (advisor)
The dissertation deals with the possibilities of adding recycled asphalt pavement (RAP) to the stone mastic asphalt (SMA), which is increasingly being promoted due to its good resistance to permanent deformations and high traffic load. Thanks to the use of high-quality input materials in production, this is a valuable material source. The theoretical part describes composition of SMA mixture and problems of pavement recycling. The practical part deals with SMA 11S laboratory designs with RAP ratio of 0 to 50%. Based on these suggestions, a trial section with 17 variants was placed, which varied with the content and quality of the RAP and the used additives. All variants have been subjected to functional testing not only on mixtures but also on recovered binders. The results obtained during the dissertation were used to build a certified methodology named "Methodology of application RAP to Stone Mastic Asphalt." In conclusion, the results of the dissertation are summarized.
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Asphalt concrete for very thin layers
Kubánek, Ondřej ; Frýbort, David (referee) ; Hýzl, Petr (advisor)
The aim of bachelor thesis is to gain experience with the design mixtures of asphalt concrete for very thin layers. Familiarizing with the properties of these mixtures, as porosity, water resistance and resistance to permanent deformation. Comparing detected parameters with the requirements of standard EN 13108-2 and its National Annex.
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Use of recycled building materials to urban pavement constructions
Průdková, Hana ; Hýzl, Petr (referee) ; Stehlík, Dušan (advisor)
This bachelor thesis describes the possibilities of construction and demolition waste management. It examines the issue of allocation and management of this waste and evaluates possibilities of their further use. It deals with production and use of recycled materials in construction of urban roads and economic advantage of recycled materials in comparison to natural aggregates. This work also discusses the issue of aerated concrete, as a modern building material, that will soon appear in construction and demolition waste to a greater extent. The practical part examines properties of mixed recyclates with a certain amount of brick and aerated concrete particles by testing the bulk density of grains and water absorption, freezing and thawing resistance and crushing resistance.
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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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Rheological properties of asphalt binders
Pěnčík, Michal ; Mondschein,, Petr (referee) ; Hýzl, Petr (advisor)
The Diploma thesis is focused on rheological properties of bituminous binders and mixtures. Above all, it describes the changes of these properties of samples of bituminous binders and mixtures. Those were brought by the process of laboratory aging, since it simulates the changes occurring in the in the real-life conditions. The theoretical part depicts the field of rheology and methods utilized for simulating the ageing of binders and mixtures. The practical part describes the process of preparation of samples and its testing. Firstly, the ageing of bituminous mixture by the means of BSA method (Braunschweiger Alterung) took place, which was followed by preparing the solids for testing the modulus of stiffness and main testing. The rest of the mixture was used for extracting the binder. Tests with the binder were focused on the usage of dynamic shear rheometer (complex shear modulus, dynamic viscosity). The last part of the work is dedicated to the comparison of the outcomes of testing.
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Aplication of
Žůrek, Jakub ; Mališ, Luděk (referee) ; Hýzl, Petr (advisor)
This master thesis deals with the pavement management system as a tool for a management and maintenance of the roads in the Liberec region. The aim is to collect road failures within the network pavement management system level on roads of 2nd and 3rd class. The resulting data will be used for evaluate pavement condition and make plans of pavement maintenance and rehabilitation in variants. Furthermore, the thesis deals with individual variants in the process of data evaluation when evaluating their suitability and accuracy. The theoretical part summarises the information needed to understand the functioning of the road management system, as well as a description of the software used to collect and subsequent work with the data. In the practical part are presented results of the thesis and moreover the questions arising from the goals set are answered.
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