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The effect of the shrinkage reducing additives on rheological properties of high-strength concrete
Červenka, Jiří ; Kucharczyková, Barbara (referee) ; Daněk, Petr (advisor)
Master’s thesis examines the effect of the shrinkage reducing additives on rheological properties of high-strength concrete. The first part is focused on high-strength concrete in terms of their composition and properties. The second part contains a detailed analysis of the cementitious composites shrinkage problems. Total shrinkage is divided into individual elementary shrinkages. For each of them there is a detailed description of causes and factors that affect their sizes. The next part describes the basic additives used to reduce the shrinkage of cementitious composites. The experimental part is focused on verifying the effectiveness of the shrinkage reducing additives during preparation of high-strength concrete. Usage of shrinkage drains for relative strain measurement enables to determine the process of shrinkage immediately after placing the concrete in the form and to obtain the overall curve of the hight-strength concrete volume changes during its setting and hardening. At the end of the thesis, there are overall analysis and summary of the results of the performed experiments.
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The protection of the village Račice against the extravilan run off
Hyžák, Aleš ; Vrba, Jan (referee) ; Milerski, Rudolf (advisor)
This thesis deals with problematic of external area water in river basins and its negative impact on the urban areas. The work is divided into two parts. The first part is describes the possibilities of technical interventions in river basins, which can affect the hydrologic conditions in those basins. First part also describes the possibilities of transformation by particular types of draining facilities. Second part of the thesis consists of an analysis of the situation in the village Račice and proposition of hydrotechnological solution for this village.
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Upgrading of Praha Liběň Locomotive Servicing Depot
Ondra, Michal ; Burda, Petr (referee) ; Svoboda, Richard (advisor)
The topic of my thesis is to study the complex reconstruction of the locomotive servicing depot Praha Liben. The locomotive depot is both operational maintenance and repair trains. The section reconstruction begins in turnout number 1, the whole area locomotive depot will be reconstructed. The main task is to propose an exchange of stepped old construction turnout for turnout new one in the whole area of the depot. The total number of changed points is 27. Depot demolition tasks in order to extend the track number 10 on the minimum usable effective length of 105 meters is the other task. Establishment of two dead-end tracks number 15 and 17 will be extend to an effective length of 105 metres. Retaining wall with PU componentsis designed along track 17. The next task is to solve the drainage area. The area will be drained interconnected system drains into the sewer and trench walls.
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Study of possibilities protection against rural zone water
Matějková, Jana ; Roubcová, Radka (referee) ; Milerski, Rudolf (advisor)
The first part of this thesis deals with the surface runoff and countermeasures. This allows us to control the hydrological conditions in the basin. Methods of protection against soil surface runoff are mentioned. A separate chapter is focused on dry retention tanks. Aim of the second part of the thesis is to design specific measures in the village of Otaslavice to prevent external area water from flooding the village. This issue has been dealt with for the whole basin . The Guidelines for very small basin runoff calculation was used to evaluate the runoff there, hydro technical solution was assessed and designed using the HEC-RAS 4.1.0 and AutoCAD 2013.
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Study of possibilities protection against rural zone water
Matějková, Jana ; Roubcová, Radka (referee) ; Milerski, Rudolf (advisor)
The first part of this thesis deals with the surface runoff and countermeasures. This allows us to control the hydrological conditions in the basin. Methods of protection against soil surface runoff are mentioned. A separate chapter is focused on dry retention tanks. Aim of the second part of the thesis is to design specific measures in the village of Otaslavice to prevent external area water from flooding the village. This issue has been dealt with for the whole basin . The Guidelines for very small basin runoff calculation was used to evaluate the runoff there, hydro technical solution was assessed and designed using the HEC-RAS 4.1.0 and AutoCAD 2013.
|
|
|
The protection of the village Račice against the extravilan run off
Hyžák, Aleš ; Vrba, Jan (referee) ; Milerski, Rudolf (advisor)
This thesis deals with problematic of external area water in river basins and its negative impact on the urban areas. The work is divided into two parts. The first part is describes the possibilities of technical interventions in river basins, which can affect the hydrologic conditions in those basins. First part also describes the possibilities of transformation by particular types of draining facilities. Second part of the thesis consists of an analysis of the situation in the village Račice and proposition of hydrotechnological solution for this village.
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|
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Upgrading of Praha Liběň Locomotive Servicing Depot
Ondra, Michal ; Burda, Petr (referee) ; Svoboda, Richard (advisor)
The topic of my thesis is to study the complex reconstruction of the locomotive servicing depot Praha Liben. The locomotive depot is both operational maintenance and repair trains. The section reconstruction begins in turnout number 1, the whole area locomotive depot will be reconstructed. The main task is to propose an exchange of stepped old construction turnout for turnout new one in the whole area of the depot. The total number of changed points is 27. Depot demolition tasks in order to extend the track number 10 on the minimum usable effective length of 105 meters is the other task. Establishment of two dead-end tracks number 15 and 17 will be extend to an effective length of 105 metres. Retaining wall with PU componentsis designed along track 17. The next task is to solve the drainage area. The area will be drained interconnected system drains into the sewer and trench walls.
|
|
|
The effect of the shrinkage reducing additives on rheological properties of high-strength concrete
Červenka, Jiří ; Kucharczyková, Barbara (referee) ; Daněk, Petr (advisor)
Master’s thesis examines the effect of the shrinkage reducing additives on rheological properties of high-strength concrete. The first part is focused on high-strength concrete in terms of their composition and properties. The second part contains a detailed analysis of the cementitious composites shrinkage problems. Total shrinkage is divided into individual elementary shrinkages. For each of them there is a detailed description of causes and factors that affect their sizes. The next part describes the basic additives used to reduce the shrinkage of cementitious composites. The experimental part is focused on verifying the effectiveness of the shrinkage reducing additives during preparation of high-strength concrete. Usage of shrinkage drains for relative strain measurement enables to determine the process of shrinkage immediately after placing the concrete in the form and to obtain the overall curve of the hight-strength concrete volume changes during its setting and hardening. At the end of the thesis, there are overall analysis and summary of the results of the performed experiments.
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