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Use of polymers in road constructions
Klusková, Jana ; Komenda, Radek (referee) ; Stehlík, Dušan (advisor)
The diploma thesis deals with the use of recycled polymers in asphalt mixtures. In the theoretical part of the thesis there is discussed the global issue of plastic waste including the experience of foreign countries, where this technology has already been introducted and used. The practical part is devoted to the proposal of using recycled plastic in asphalt mixture, description of used laboratory tests and the evaluating the effect of low-density polyethylen (LDPE) on the asphalt mixture type AC. There were performed tensile strenght tests, water resistant tests and stiffness modulus tests in the laboratory (E). The output of this work is an evaluation of measured values, processing of results and their interpretation depending on the possible use of this technology in Czech republic.
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Design of asphalt concrete mixture and determinantion of the resistance against permanent deformation
Němec, Jan ; Matoušek, David (referee) ; Varaus, Michal (advisor)
This bachelor thesis deals with the problem regarding asphalt concrete mixtures, concretely ACO 11+. This type of mixture has low resistance to permanent deformation (rutting) while high temperatures are present. The binder and aggregate tests regarding physical and mechanical properties were carried out. Subsequently the new mixture was designed on the basis of stricter requirement for grading envelope and air void content. The design mixture was tested for resistance to permanent deformation. From the obtained results the change in the national annex of the standard ČSN EN 13108-1 is considered in terms of change in testing temperature for some kinds of binders. The same tests were conducted in others asphalt laboratories in the Czech Republic to ensure the maximum comparability.
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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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Influence of aging on selected properties of asphalt binders
Rimel, Jindřich ; Dašek, Ondřej (referee) ; Hýzl, Petr (advisor)
In this bachelor’s thesis, the properties of four asphalt binders with different degree of modification are compared. The influence of aging on their properties is examined. In the theoretical part, the types of aging, their impact on binders, basic laboratory methods of aging and the details of performed tests are explained. In the practical part, the results of tests are evaluated and the change of properties before and after aging are compared.
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Use of polymers in road constructions
Klusková, Jana ; Komenda, Radek (referee) ; Stehlík, Dušan (advisor)
The diploma thesis deals with the use of recycled polymers in asphalt mixtures. In the theoretical part of the thesis there is discussed the global issue of plastic waste including the experience of foreign countries, where this technology has already been introducted and used. The practical part is devoted to the proposal of using recycled plastic in asphalt mixture, description of used laboratory tests and the evaluating the effect of low-density polyethylen (LDPE) on the asphalt mixture type AC. There were performed tensile strenght tests, water resistant tests and stiffness modulus tests in the laboratory (E). The output of this work is an evaluation of measured values, processing of results and their interpretation depending on the possible use of this technology in Czech republic.
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Machine for the recovery of road signs on roads
Malchárek, Martin ; Škopán, Miroslav (referee) ; Kašpárek, Jaroslav (advisor)
Object of this bachelor’s thesis is machine for the removing road signs on roads. Bachelor’s thesis involves background research with selection of similar machines on the market. Next part is focused on self design of the machine. Requirement of the design was simplicity of producing and high comfort for operator. This design is supported by calculations of basic parameters, V-belt transmission and strength check of shaft with tools.
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Binders for flexible pavements
Pěnčík, Michal ; Čiháčková, Pavlína (referee) ; Hýzl, Petr (advisor)
The Bachelor`s thesis is focused on binders, which are used in flexible pavements. Firstly, we offer the reader description of different types of bitumen binders, which could be found in nature, and binders produced from petroleum through the process of distillation and further processing. Later on, we focus on the issue of testing these binders. The last part of the work deals with alternative types of binders which could potentially replace traditional bitumen binders.
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MSCR test in dynamic shear rheometer
Střasáková, Monika ; Coufalík, Pavel (referee) ; Kudrna, Jan (advisor)
The laboratory properties of bituminous binders in relation to permanent deformation are described in this bachelor‘s thesis. The principle and procedure of MSCR test will be explained in the theoretical part. The principle of empirical tests (needle penetration, elastic recovery and softening point) will be also described. The properties of four bituminous binders will be evaluated in practical part. The comparison of binders will be performed based on test results.
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Microsurfacing using Reclaimed Asphal Pavement
Kolesniková, Simona ; Valenta, Jakub (referee) ; Šperka, Pavel (advisor)
The road network in the Czech Republic is almost 55,738 km long and its maintenance has been underfunded for a long time. It is therefore necessary to look for ways to extend the overall service life of roads. Microsurfacings belong to the emulsion slurry layers and are made up of a thin layer of a mixture of aggregate and modified asphalt emulsion. It is a pavement maintenance technology used to extend the service life of pavements by 5 to 9 years. As the supply of quality aggregate is gradually decreasing and the price of feedstock for microsurfacing is increasing, the possibility of incorporating R-material into this technology needs to be addressed. This thesis deals with the replacement of natural aggregates in microsurface R-material in the amount of 100 %. In the framework of the work, the formulation of the microsurface with R-material was optimized.
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