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Usage of recycled material in stone mastic asphalts
Slavíček, Michal ; Komenda, Radek (referee) ; Hýzl, Petr (advisor)
This diploma thesis deals with the designs of asphalt mixtures for the wearing asphalt courses, specifically for the SMA 11S with an added 30 % and 50 % RAP (reclaimed asphalt pavement), this material was reclaimed from the wearing asphalt course type SMA. The thesis is divided into two parts. The first part is theoretical and it deals with the recycling of asphalt roads and adding RAP to the new asphalt mixures for the roads. The second part is practical. It deals with the design itself. Two types of SMA were designed, first with a 30 % RAP and second with a 50 % RAP. In those mixtures functional tests of asphalt mixtures were made.The results were compared to the asphalt mixture with 0 % of RAP and with the mixture with 30 % of RAP reclaimed from the wearing, binder and base course together. The results are summed up in the conclusion.
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Durability of the waste building materials for subgrade
Lorenc, Daniel ; Hýzl, Petr (referee) ; Stehlík, Dušan (advisor)
The Bacherol thesis is focused on the use of waste building materials to subgrade of the pavement. Examines in detail advantages and disadvantages of this recycled material. Mainly deal with negative properities like water absorption and frost action, and figure out the dependance on the amount of brick parts in waste buildingng material. It practically verifies California bearing ratio, water absorption and rate of frost action of waste building material. A decisive impact on results will have a number of brick parts in recycled material.
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Pavement milling
Žižka, Tomáš ; Dašek, Ondřej (referee) ; Hýzl, Petr (advisor)
The aim of my bachelor thesis, which is a research based, is the processing of knowlegde of road milling works. The first part of the thesis is focused on the usage of milling. In the following section, I focused more on the milling process itself, technology and types of milling equipment. Part of this work is introduction of modern milling methods as well as introduction of three companies in the Czech Republic which operate on road milling works. Last part is focused on standard milling regulations. The thesis was done for study purposes.
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Ageing of asphalt binders and mixtures
Štěpanovský, Vlastimil ; Komenda, Radek (referee) ; Hýzl, Petr (advisor)
Diploma thesis is particularly focused on ageing of asphalt mixtures and asphalt binders. In the theoretical part an array of methods simulating short term and long term ageing consequently is introduced. The main objective of the practical part was to carry out the long-term ageing test method BSA (Braunschweiger Alterung). Thereafter, specimens testing for stiffness properties according to CSN EN 12697-26 were made. After conducting the measurement on those, asphalt binder was extracted and processed to follow-up testing. The testing consisted of a range of methods – Penetration CSN EN 1426, Ring and Ball test CSN EN 1427, Determination of the Frass breaking point CSN EN 12593, Determination of complex shear modulus CSN EN 14770 and Dynamic viscosity using a dynamic shear rheometer (DSR). The given results were assessed in the last part in order to evaluate the rate of the binder degradation caused by the method BSA.
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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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Recycled material in Stone mastic asphalts
Machel, Ondřej ; Coufalíková, Iva (referee) ; Hýzl, Petr (advisor)
This bachelor thesis deals with the issue of adding s Reclaimed asphalt pavement (RAP) to the wearing courses of asphalt mixtures, particularly of the SMA 11S type. The thesis consists of two parts. The theoretical part is focused on the topic in general and it describes the way it is obtained, stored and used with the help of the hot recycling method. The practical part's focus are two mixtures used for laboratory testing, containing 30 % and 50 % RAP of the SMA type. It includes information about the test section, description of the mixture production and of the tests performed and it provides commentary on their results. Finally, the results are compared with the SMA 11S reference mix without RAP.
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Skid resistance of asphalt layers with recycled materials
Bambulová, Lucie ; Nekulová, Pavla (referee) ; Hýzl, Petr (advisor)
The diploma thesis deals with the problems of pavement surface skid resistence of wearing course of asphalt mixtures with R-material. Specifically, it is a mixture of type ACO 11 (asphalt concrete for wearing layers). In the theoretical part of the thesis there are dismantled the problems of Antiskid properties of the road surface and recycling of R-material. The practical part is dedicated to the design and laboratory production of the asphalt mixture ACO 11 without admixture of R-material and with content of 38 % R-material. In addition, the results of the measurement of friction coefficient after smoothed for these bitumen mixtures are shown in the work. The aim of the thesis was to determine the influence of the increased content of R-material on the anti-skid properties of the road surface as it is planned to update the standard ČSN EN 13108-1, which will allow the use of up to 40 % R-material into the mixtures of type ACO 11.
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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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Usage of Rich Bottom Layers
Simkovič, Lukáš ; Hegr, Zdeněk (referee) ; Hýzl, Petr (advisor)
The aim of this diploma thesis is theoretical knowledge of the problems rich bottom layer and practical part of comparison of three asphalt mixtures for base layers using common road bitumen and modified rubber granulate. Selected functional laboratory tests (low temperature, fatigue resistance, bulk density) and stiffnes modules are performed on these mixtures and the results are compared to each other.
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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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