National Repository of Grey Literature 62 records found  1 - 10nextend  jump to record: Search took 0.00 seconds. 
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.
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.
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.
The use of the secondary aggregates to pavement
Hurtiš, Maroš ; Hrbek, Kamil (referee) ; Stehlík, Dušan (advisor)
The master thesis deals with the possibilities of using waste aggregate from main rock production to hydraulically bound mixtures, witch are used in base and sub base pavement. The theoretical part describes conditions and properties of bound mixtures, aggregates and cement. The practical part describes the process of design, mixture preparing and laboratory test carried out on them. The bound mixtures are testing in compressive strength, frost and water resistace and resilient modulus.
Double-stage system of subgrade stabilization
Švarcová, Monika ; Mondschein,, Petr (referee) ; Stehlík, Dušan (advisor)
This diploma thesis is focused on the properties of unsuitable and conditionally unsuitable fine-grained soils after a one-stage or two-stage treatment by using a binder. The theoretical part occupies with problematical properties of the fine grained soils in a subgrade and a possible technology of the change of these properties. The laboratory testing of treated soils is described and a practical technology of the one stage and two-stage stabilization. In the practical part the fine grained soils are treated by one-stage or two-stage stabilization. For the one stage stabilization the cement is used, for the two-stage stabilization the properties of the soil are improved by lime and then the soil is stabilized by cement. The treated soils are laboratory tested, the initial bearing index IBI, California bearing ratio CBR, unconfined compressive strength and frost susceptibility is tested. Based on the results of the laboratory tests the benefit of the two-stage stabilization is measured.
The use of the waste aggregates for bound mixtures of pavements
Chloupek, Adam ; Zajíček, Jan (referee) ; Stehlík, Dušan (advisor)
The works deals with the possibilities of using non-standard fraction of fine crushed aggregate in route base layers. Goal of my thesis is research of using material from specific location. Theoretical part summarizes basic knowledge regarding bound mixtures and their normative requirements. Practical part of my thesis describes my various mixture design and following testing and determination of design properties by official and experimental tests. The conclusion summarizes the researched outputs and findings, which confirm the future possibilities of using this material in base layers.
Usage of foam bitumen
Prídavková, Natália ; Stehlík, Dušan (referee) ; Hýzl, Petr (advisor)
The aim of this bachelor thesis was to describe the issue of foam bitumen technology in the production and paving of asphalt mixtures. The first chapter is devoted to the contexts needed to understand the issues of reducing production temperatures and the use of warm mix asphalt (WMA), especially foamed bitumen. The second chapter is aimed to understand the concept of warm mix asphalt and explains the production technology of foamed bitumen and the asphalt foam properties. The penultimate and most comprehensive chapter is an overview of commercial products, practices and experience with foamed bitumen abroad, where WMA technologies are more widespread. The results of these studies show that foaming processes, as well as other types of WMA, are more ecological equivalent to commonly used hot mix asphalt. The last chapter summarizes the experience in the Czech Republic and its technical standards of foamed bitumen technology.
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.
Influence of the mixing plant manufacturing temperatures on the properties of aggregates
Brtníková, Tereza ; Stehlík, Dušan (referee) ; Hýzl, Petr (advisor)
The bachelor thesis describes the production process of aggregate and production process of asphalt mixing in batch asphalt mixing plant. There is also mentioned the test procedure of endurance against grind and against freezing and defrosting. The tests were did on 3 types of rocks, which have been burdened by temperature on 110 °C, 200 °C and 300 °C. Then were the results compared.
California bearing ratio CBR - dynamic test
Cvečka, Tomáš ; Pácha, Petr (referee) ; Stehlík, Dušan (advisor)
The work is devoted to the use of dynamic load test in road construction. The theoretical part deals with the description of the test with using classical CBR test with dynamically acting load. The practical part is devoted to the preparation of the soil sample for the dynamic test and following evaluation of the classical static and experimental dynamic method tested on two soil samples. The aim of the work is to find out the correlation relationship of these two tests as well as to verify the relevance of the used dynamic method.

National Repository of Grey Literature : 62 records found   1 - 10nextend  jump to record:
See also: similar author names
1 Stehlik, Dijana
1 Stehlík, David
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