National Repository of Grey Literature 90 records found  1 - 10nextend  jump to record: Search took 0.01 seconds. 
The influence of cold RAP addition on the resulting temperature of the asphalt mixture
Bocák, Tomáš ; Hýzl, Petr (referee) ; Dašek, Ondřej (advisor)
The aim of the bachelor thesis is to simulate the effect of dosing cold reclaimed asphalt into a hot aggregate mixture, under laboratory conditions. The theoretical part will describe the possibilities of reclaimed asphalt dosing in the production of asphalt mix, together with the principles for the design of a new asphalt mix. In the practical part, by my proposed procedure, the cold portion of aggregate will be mixed with the hot portion of aggregate. The measurements will result in the final aggregate mixture temperatures and their comparison.
The use of 3D technologies in the realizatation of road constructions
Bartlík, Aleš ; Tejkal, David (referee) ; Hýzl, Petr (advisor)
This bachelor's thesis deals with the possibilities of using 3D technologies in the realization of road constructions. The first part of the thesis contains general information about BIM, its advantages and obstacles and describes the use of construction machines including their connection with the 3D model of the construction. In the second, practical part, a specific construction site is assessed where a 3D model was used to guide construction machines.
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.
Coarse-grained asphalt mixtures
Rimel, Jindřich ; Dašek, Ondřej (referee) ; Hýzl, Petr (advisor)
The diploma thesis investigates the properties of coarse-grained asphalt mixtures ACP 32, which are compared with the properties of ACP 22 mixtures. The theoretical part deals with the composition of asphalt mixtures, their production, transport and laying. Experience with using coarse-grained mixtures around the world is also presented. The practical part deals with mixture design, production and testing to assess the properties of the mixtures. The tests selected for the comparison of the properties are wheel tracking, TSRST and stiffness by a two-point bending test.
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.
Evaluation of asphalt pavements bearing capacity based on Traffic Speed Deflectometer diagnostics
Březina, Ilja ; Gschwendt,, Ivan (referee) ; Čelko,, Ján (referee) ; Hýzl, Petr (advisor)
The submitted dissertation focuses on the use of a Traffic Speed Deflectometer (TSD) for diagnosing bearing capacity of asphalt pavements, verifying a new method of non-destructive deflection measurements, and producing a method for indicative evaluation of asphalt pavement bearing capacities at the network level in the Czech Republic. The theoretical part describes the principle of TSD device measurements, evaluation methods for measured data, and summarizes the existing foreign experience with TSD devices, including the correlation with a Falling Weight Deflectometer (FWD). The practical part contains an analysis of performed measurements, evaluates the findings of studying the correlation between a TSD device and an FWD device during a comparative measurement in the Czech Republic, and presents a calculation method for deflections from primary data measured by the TSD device. Based on the obtained results, a method for indicative evaluation of asphalt pavements bearing capacities at the network level is designed.
Mastic Asphalts
Škorík, Michal ; Dašek, Ondřej (referee) ; Hýzl, Petr (advisor)
This bachelor‘s thesis aims to closely showcase the knowledge of mastic asphalt. The theoretical part describes history, consistency of the mixture, production process and technique of application including the newest trends. The practical part includes the assessment of bulk density altogether with the functional tests of stiffness modulus and the resistance to low temperatures for the sample of mastic asphalt with polymer modified asphalt.
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.
Coarse graded asphalt mixtures
Mucha, Ondřej ; Dašek, Ondřej (referee) ; Hýzl, Petr (advisor)
The bachelor’s thesis is focused on asphalt mixtures that contain coarser aggregates than currently allowed by technical regulations in the Czech Republic. The introductory part of the work describes the composition of asphalt mixtures, their division and use. Further deals with foreign experience with these types of asphalt mixtures and their use in the surrounding European countries and in the United States of America. The aim of this work is to obtain a theoretical overview of knowledge about coarse graded asphalt mixtures from foreign sources and research.
Usage of data for the pavement management system on roads II. and III. classes to assess the effects of external influences on the road surface
Skořepová, Eliška ; Mališ, Luděk (referee) ; Hýzl, Petr (advisor)
The master thesis is focused on sorting collected primary data, their subsequent analysis and further comparison in the field of road defects. The collection of pavement failures was done by visual inspection with its recording to a computer for the pavement management system. The data later underwent detailed analysis with the aim to find a potential link between the road defect and the location of the damaged section. The study took place on 2nd and 3rd class roads in the Liberec Region, with special focus on those located near forests. The data collection itself took place in the Liberec Region in 2021. The processing and subsequent evaluation of collected data was done thanks to the availability of comparable data sets from 2014 and 2019 to 2021, so the development of road defects of the selected road network in relation to the surrounding afforestation could be assessed. The last part of this master thesis compares results in different classification levels, time periods and levels of afforestation.

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