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Properties of asphalt mixtures with RAP
Trnka, Lukáš ; Coufalíková, Iva (referee) ; Dašek, Ondřej (advisor)
The bachelor thesis deals with the properties of asphalt mixtures with reclaimed asphalt. Possibilities of rejuvenate of binder contained in reclaimed asphalt are mentioned in the theoretical part. There is explained the principle of rejuvenators function, types of rejuvenators and ways of rejuvenators dosing into the asphalt mixture. The procedures for performing the stiffness modulus test (2PB-TR) and the low temperature (TSRST) test are described in the following part. Individual tests are evaluated and asphalt mixtures are compared in the practical part of bachelor thesis.
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Stone mastic asphalts with recycled materials - bituminous binders properties
Dzurková, Veronika ; Coufalíková, Iva (referee) ; Hýzl, Petr (advisor)
The bachelor thesis is focused on the issue of adding R-material to stone mastic asphalt mixtures (SMA). The material was obtained from a plant that put the mixture in the test section on the road II/227. The theoretical part describes the problems of recycling of asphalt roads, bituminal binder theory and problems associated with the addition of R-material to hot asphalt mixtures. Bituminal binders from mixtures with different percentages of R-material were extracted in the practical part. Empirical and functional tests were performed on these binders. The aim of the thesis is to determine the influence of the presence of R-material on SMA asphalt mixture in terms of properties of asphalt binder.
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Cold asphalt mixtures
Spáčil, Petr ; Hýzl, Petr (referee) ; Dašek, Ondřej (advisor)
The bachelor thesis is divided into theoretical and practical part. The theoretical part consists of explanation of the problem. The thesis includes definitions as Bitumen, Asphalt Mixture, Asphalt Binder, Cut-back Bitumen and Viscosity. The practical part is focused mainly on the description of the test methods used on Asphalt Binders and Mixtures which were intended for repairs. It describes differences between used Asphalt Binders and explains and describes other used materials. The practical part compares the mixtures of different Cut-back Bitumen. It describes the production process and project of Cut-back bitumen mixture, the production process of individual test solids and compares the differences with hot made asphalt mixture. It also describes the analysis of volumetric, mechanical-physical and funcional tests in purpose of evaluating the differences between standard Cut-back Bitumen and new biofluxed asphalt binder.
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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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Dosage of rejuvenating agents to asphalt mixture with high content of RAP
Čumíčková, Markéta ; Coufalíková, Iva (referee) ; Dašek, Ondřej (advisor)
The diploma thesis is focused on the appropriate dosage of rejuvenating agents in asphalt mixtures with high content of RAP. The empirical and functional laboratory tests are described in the theoretical part. The practical part deals with the estimation of the optimal amount of rejuvenating agents by means of laboratory tests so that the rheological properties of the degraded asphalt binder can be restored by suitable dosing into the RAP. As part of the TAČR ZÉTA project, an experimental section of asphalt mixture containing 50 % of the RAP and an appropriate amount of the rejuvenating agents was created. The aim of the thesis is to find an optimal dosage of the rejuvenating agents in the samples of the RAP and laboratory aged asphalt binder of gradation 50/70, to determine the effectiveness of selected rejuvenating agents and to monitor changes in the parameters of the experimental section during the period of time.
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The evaluation of properties of fine aggregate for asphalt mixtures
Kadlček, Jakub ; Sychra, Martin (referee) ; Dašek, Ondřej (advisor)
The diploma thesis is focused on evaluation of properties of fine aggregate by means of laboratory tests. Fine aggregate evaluation was performed using sieving test, laser diffraction, delta ring and ball test, bitumen number test, uncompacted void content of fine aggregate according to AASHTO T 304, voids of dry compacted filler (Rigden) test and particle density of filler. Laboratory research has led to the discovery of some properties of fine aggregate and their dependencies.
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Recycled material in Stone mastic asphalts
Motl, Vojtěch ; Coufalíková, Iva (referee) ; Hýzl, Petr (advisor)
The Bachelor’s thesis deals with an issue of adding a Reclaimed asphalt pavement (RAP) into surface courses, especially SMA 11S. The thesis is divided into two parts – theoretical and practical. The theoretical part defines the term RAP and explains how to gain RAP and how to use it for a hot recycling at asphalt plants. The practical part deals with the design of asphalt mixture containing 30 % of RAP, the preparation of test specimens, the description of executed tests and the results of those tests. The results are compared with SMA 11S without RAP.
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Influence of usage of recycled material on asphalt mixtures functional properties
Šperka, Pavel ; Hegr, Zdeněk (referee) ; Hýzl, Petr (advisor)
Diploma thesis deals with the topic of using recycled material in the production of asphalt mixtures. In the theoretical part the methods of recycling flexible pavement are described and as well as ways in which recycled material is added to asphalt mixtures produced by the stationary hot mix plant. The thesis also deals with the current state of recycled material use in the Czech Republic and the reasons for its possible greater use. The practical part of the thesis studies the effect of using the amount of 20% recycled material to asphalt mixtures of asphalt concrete for wearing course ACO11+, on selected functional properties of these mixtures. It is also investigates the influence of bitumen binder contained in the recycled material, on the final properties in manufactured asphalt mixtures. An integral part of this thesis is a description of all methods that were used during the processing of the practical part. In the end of this thesis there are some results of findings about adding recycled material into asphalt mixtures.
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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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Use of fluxing additives to modify the properties of asphalt binders
Šefránková, Radka ; Koudelka, Tomáš (referee) ; Dašek, Ondřej (advisor)
The subject of the thesis is to describe the effect of fluxing additives on the behaviour of asphalt binders. Emphasis will be placed on changes in rheological properties of asphalt binders at intermediate temperatures, stability during aging and influence of fluxing agents on their low-temperature properties. Theoretical part will deal with the principle of asphalt binders aging and it will summarize knowledge about fluxing additives. Further, empirical and functional tests will be described in order to evaluate asphalt binders. In the practical part, all laboratory tests will be evaluated and the effects of two different fluxing additives will be compared.
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