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Waste building material to subgrade pavement
Masař, Daniel ; Hýzl, Petr (referee) ; Stehlík, Dušan (advisor)
The theoretical part of the diploma thesis searches the production of Construction and demolition waste and their subsequent transformation into the final recyclate and its possible use in roads. Attention is focused on the use of mixed recycled material into subgrade of the pavement and the characteristics of tests that must be performed before its used to the road. The next chapters pai attention to the problematic properties of recyclates, foreign experience with the use of mixed recyclate in Construction and the possibilities of its development. The practical part verifies the suitability of mixed recycled material into subgrade of the pavement using laboratory tests. The tests are performer on individual mixtures of mixed recycled material with cement, blast furnace slag or cement dust in various percentages. The results are then compared and it is evaluated which mixtures show the best properties. Part of the practical part is also the economic evaluation of these mixtures against commonly used materials.
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Cold asphalt mixtures with R-material
Ševc, Jan ; Mondschein,, Petr (referee) ; Stehlík, Dušan (advisor)
The thesis is focused on the use of R-material into cold asphalt mixtures. It deals with cold recycling and with input materials for this technology. It verifies properties of R-material and residues of bituminous binder. It also verifies properties of designed cold asphalt mixtures by the probative controls (indirect tensile strenght and water resistance). Furthermore is focused on the experimental measurement of selected mixtures to ensure more characteristics. The amount of homogenity of R-material, quantity and quality of residues bituminous binder is essential for positive results.
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The use of asphalt recycled materials in the base and subbase layers of pavements
Tanečková, Pavlína ; Hýzl, Petr (referee) ; Stehlík, Dušan (advisor)
This thesis consists of theoretical and practical parts. The theoretical part gathers available information on the current state of construction and demolition waste management. This part discusses foreign experiences with SDW management, provides basic information on the introduction of circular economy. Equally important is the environmental impact, which is discussed from the perspective of Decree No 283/2023 Coll. It also provides basic information on construction and demolition waste and describes the recycling process. It also discusses the most common types of recyclates and their use in roads. The practical part of this thesis verifies the possibilities of using asphalt recyclates and their mixtures cemented with asphalt emulsion or hydraulic binder. The main objective was to verify the possibilities of using these recyclates in cemented subbase layers for urban roads. These possibilities were verified and then compared by means of laboratory tests. Finally, a comparison of cemented mixtures of asphalt recyclates with specific binder dosage and low temperature heating of the mixture for optimum compaction to the desired strength values using recyclates is made.
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Change in the durability of concrete made of recycled concrete by alternative addition of ceramic admixtures
Stavař, Tomáš ; Hoffmann, Oldřich (referee) ; Stehlík, Michal (advisor)
The master thesis dealing with problematic about durability of concrete, with use of recycled concrete and addition of silica additions. Predominant for resistance of concrete constructions is surface layer, through which aggressive gasses and liquids penetrate from surrounding environment. The most important indicator of concrete durability is ability of surface layer transmissions of aggressive substants. In experimental part will be defined the actual state of surface layer by normal testing methods. The transmissions of surface layer will be tested on concrete cubes. Tests for transmissions of air (method TORRENT), of water (method ISAT), of acid gases (dept of carbonation by quick test in 98% CO2) will be carried out and also strength tests. Assessment of positive or negative influence of additions and amount of cement on durability and mechanical properties of concrete will be discussed in conclusion.
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Study of properties of cementitious composites with fiber reinforcement from inorganic fibers
Gottwaldová, Aneta ; Novosad, Petr (referee) ; Bodnárová, Lenka (advisor)
Diploma thesis deals with study of properties of cementious composites with fiber reinforcement from glass and basalt inorganic fibers. Diploma thesis includes a theoretical and experimental part. The theoretical part deals with information about glass and basalt fibers, their durability and usage. In the experimental part we monitored properfies of cement composites with basalt and glass fibers. Fibers were exposed to an aggressive environment. The properties of composites with reference fibers were compared with composites with fibers affacted by the aggressive environment. The properties of composites were examined after 28 and 90 days. We monitored compresive strenght, bending tensile strenght, tensile strenght, surface layer strenght and SEM.
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Use of alternative binders in bound mixtures from waste building materials
Jakub, Tomáš ; Hýzl, Petr (referee) ; Stehlík, Dušan (advisor)
This diploma thesis is focused to use bonded base layers with different types of admixures for base layers of roads. The first, theoretical part of the work deals with summary of the available literature. Deals with basic and uncoventional type of admixures used for bonded base layers. The second, partical part of the work deals with comparsion of 5 bonded base layers with recycled asphalt with added artifical fibers, cellulose fibers or without admixures and one mixtures created only from First of all is described tesťs methods with design of mixtures and described materials. In the practical part of the work was tested compressive strength, transverse tensile strength and compressive strength after effects of frost. In the end of the work is comparsion all mixtures between themselves and determination effects admixtures on compressive strength and transverse tensile strength.
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Simulation of asphalt mixture ageing in laboratory
Staňková, Michaela ; Hýzl, Petr (referee) ; Dašek, Ondřej (advisor)
The bachelor thesis deals with the issue of ageing of asphalt binder and asphalt mixture. Asphalt mixtures of asphalt concrete type containing 50/70 paving bitumen were collected for the purposes of this thesis. Test specimens were prepared from the mixtures according to ČSN EN 12697-30+A1 standard. The test specimens were aged in a laboratory oven. Changes in properties caused by ageing were compared using particle loss of porous asphalt specimen according to ČSN EN 12697-17+A1 and the indirect tensile strength of bituminous specimens according to ČSN EN 12697-23 standard.
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Design of boundary conditions for mixtures for road base layers
Holubec, Matěj ; Hýzl, Petr (referee) ; Stehlík, Dušan (advisor)
The bachelor thesis deals with the design of suitable composition of uncompacted mixtures and mixtures cemented with hydraulic binders for road pavement subbase layers. The theoretical part describes the characteristic properties and applications of the tested material. The practical part deals with the determination of the geometric properties of unbound mixtures and mixtures bound with hydraulic binder, which are determined on the basic of laboratory tests.
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Use of waste building materials to roads
Průdková, Hana ; Hýzl, Petr (referee) ; Stehlík, Dušan (advisor)
This thesis consists of a theoretical and a practical part. The theoretical part collects available information on the current state of construction and demolition waste management. This section discusses demolition work, provides basic information on construction and demolition waste, and describes the recycling process. It also includes the most used types of recycled materials and their use in the roads. The thesis also explains the importance of the circular economy and compares prices of recycled and natural aggregates. The conclusion of the theoretical part is supplemented by foreign experiences. The practical part of this thesis focuses on the possibility of using concrete, asphalt and brick recycled and their mixtures cemented with hydraulic binders. The main goal was to verify the possibilities of using these recycled materials in the cemented base layers of roads. These options were verified and subsequently compared using laboratory tests. In the conclusion, there is an economic comparison of the use of recycled materials.
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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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