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Evaluation of properties of clear and pigmented asphalt binders
Kamanová, Monika ; Machalla, Michael (referee) ; Dašek, Ondřej (advisor)
The Bachelor thesis subject is comparison of the chosen parameters of clear asphalt binder with pigmented asphalt binder. The theoretical part explains parameters of asphalt binders and improving their properties after using additives. The second part is explaining methods and test results. The empirical tests (needle penetration, softening point, breaking point) and performance tests in dynamic shear rheometer and bending beam rheometer are used for comparison of binders properties. In the conclusion the laboratory aging of asphalt binders is described by RTFOT and RTFOT + PAV method.
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Milling of asphalt layers of pavements
Brida, Peter ; Hýzl, Petr (referee) ; Dašek, Ondřej (advisor)
The bachelor thesis is focused on the comparison of the influence of the milling machine movement speed on the properties of RAP (reclaimed asphalt pavement). The theoretical part describes issue of production and usage of RAP. The practical part evaluates the sieve size distributions of these materials and needle penetration and softening point of bitumen recovered from RAP samples.
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Characteristics of mixed building recyclates for subgrade og roads
Junek, Lumír ; Dašek, Ondřej (referee) ; Stehlík, Dušan (advisor)
The work deals with the use of mixed construction recycled material for earth bodies of roads. The theoretical part describes the production, usability and economic evaluation of recycled building materials against common natural materials. It then describes the necessary laboratory tests that examine its properties for the use of these materials in roads. In the last chapter, the work deals with foreign experience with the use of mixed construction recyclates for transport construction. The practical part examines the properties of the given recyclates for their use in the core using tests of soil freezing rate, California bearing ratio and immediate bearing index.
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Influence of polymer modified bitumens storage on their properties
Měšťanová, Petra ; Fišer,, Jiří (referee) ; Dašek, Ondřej (advisor)
Subject of this bachelor’s thesis is to describe the influence of long-term storage of polymer modified bitumen at temperature of 180 °C on their properties. The principle of binder modification and test procedure of needle penetration, softening point, elastic recovery and dynamic viscosity in DSR will be explained in the theoretical part. The properties changes of five tested modified binders during storage will be evaluated and compared in the practical part.
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Influence of boundary conditions on the aging index of asphalt binders
Štohlová, Barbora ; Koudelka, Tomáš (referee) ; Dašek, Ondřej (advisor)
The bachelor thesis deals with an influence of several boundary conditions on the aging index of various modified asphalt binders. In the thesis there is rheology and modification of asphalt binders, types of ageing (short-term, long-term) and used tests (needle penetration, softening point, complex shear modulus, phase angle, aging tests) described. In the second part there is a brief description of used materials and comparison of the test results on these materials.
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Evaluation of Selected Properties of Asphalt Mixtures with High Air Void Content
Jakub, Tomáš ; Dašek, Ondřej (referee) ; Šperka, Pavel (advisor)
The bachelor thesis is focused on selected properties of asphalt mixtures with higher air-voids content. The first, theoretical part of the work deals with summary of the available literature. Especially in terms of the distribution of mixtures with higher air-voids content and basic effects of air-voids content behavior of the asphalt mixtures. The second, parctical part of the work deals with determinine properties of two asphalt mixtures, namely: porous asphalt (PA 8) and mastix asphalt with higher air-voids content (SMA NH 8). At first is described used test‘s methods and used materials. Within the work, some tests were modified in order to simulate the effect of frost and salt on asphalt mixtures. An integral part of the practical part is the determintation of water resistence (ITSR), frost and salt of the prepared mixture, their mutual comparison and comparison with existing regulations.
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Interaction between asphalt binder and filler
Indráková, Kristýna ; Hýzl, Petr (referee) ; Dašek, Ondřej (advisor)
The thesis is mainly focused on comparison of properties of mastics, that were mixed in lab. The samples of mastics were mixed of paving bitumen in combination with 9 samples of backhouse filler, 1 inappropriate sample containing mica and 1 sample of additive filler. The folowing tests were used for assessment of samples: The particle density of filler-pyknometer method, The delta ring and ball test, The complex shear modulus and phase angle, The multiple stress creep and recovery test. The tests results were evaluated and compared. The results of the thesis are listed in the conclusion.
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Design and evaluation of asphalt rubber mixture
Hotař, Petr ; Dašek, Ondřej (referee) ; Kudrna, Jan (advisor)
The aim of bachelor thesis is to design the asphalt concrete for very thin layers using asphalt rubber and to perform laboratory tests according to ČSN EN 13108-2 and TP 148. The work is based on the literature review and respects properties of asphalt rubber. The expected properties of asphalt concretes for very thin layers are summarized and evaluated.
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