|
| |
|
|
The modification of the cyclic triaxial test
Nevrlá, Alice ; Pecha, Karel (referee) ; Stehlík, Dušan (advisor)
This bachelor's thesis focuses on determining resilient modulus of unbound granular material for subbase and subgrade pavement construction using different types of cyclic load triaxial testing procedures in Czech Republic and abroad and compares them. The practical part then deals with comparison of methods presented in Czech Standard ČSN EN 13286-7 used for resilient modulus determination of mixed recycled material, finegrained soil and fly ash.
|
|
|
The frost susceptibility of the soils and materials to subgrade of the pavements
Mašek, Jakub ; Zajíček, Jan (referee) ; Stehlík, Dušan (advisor)
This diploma thesis deals with the issue of the determination of the frost susceptibility of soils in the subgrades of road structures. The theoretical part compares the ways of testing the frost susceptibility in the Czech Republic and other selected countries of the European Union. Furthermore, it also deals with the development of the frost susceptibility index in the Czech Republic. The empirical part focuses on the laboratory testing of the frost susceptibility of the given sample of soil by the direct frost heave method. Moreover, it also deals with the simulation of penetration of frost by the subgrade and the possibility of shortening the length of the freezing during the direct testing the frost susceptibility.
|
|
| |
|
|
Monitoring of the modulus of elasticity of the pavement subgrade
Hladík, Aleš ; Mondschein,, Petr (referee) ; Stehlík, Dušan (advisor)
This thesis deals with compares the procedures carried out in the cyclical load triaxial testing device according to CSN EN 13286-7, and the procedures performed in the United States of America. In the practical part elasticity moduls of mixed recycled material are experimentally compared with mixed recycled material containing binder(connective material) and with fine-grained soil in the cyclical load triaxial testing device. Further the thesis assesses the use of mixed recycled material in the construction of a third class low-load pavement.
|
|
|
Influence of clay fraction on residual strength of soils
Bočková, Kateřina ; Boháč, Jan (advisor) ; Najser, Jan (referee)
This bachelor thesis studies the influence of clay fraction on the residual strength of soils. The introductory part of the thesis outlines the topic of residual strength in soil mechanics. The main part contains a review of research papers that studied the influence of clay fraction on the residual strength of soils. The information from the review is summarized and used in the design of laboratory experiments. A series of ring shear tests were conducted on (i) clay fraction from the "Dobkovičky" area, (ii) sand from the Střeleč quarry and (iii) their mixtures. The experimental results correspond with the reviewed papers: the correlation between the residual strength and the content of the clay fraction is, without the knowledge of mineralogical compostition, insufficient. Therefore, the ring shear test is the most reliable method of determining the residual strength.
|
|
|
The modification of the cyclic triaxial test
Nevrlá, Alice ; Pecha, Karel (referee) ; Stehlík, Dušan (advisor)
This bachelor's thesis focuses on determining resilient modulus of unbound granular material for subbase and subgrade pavement construction using different types of cyclic load triaxial testing procedures in Czech Republic and abroad and compares them. The practical part then deals with comparison of methods presented in Czech Standard ČSN EN 13286-7 used for resilient modulus determination of mixed recycled material, finegrained soil and fly ash.
|
|
|
The frost susceptibility of the soils and materials to subgrade of the pavements
Mašek, Jakub ; Zajíček, Jan (referee) ; Stehlík, Dušan (advisor)
This diploma thesis deals with the issue of the determination of the frost susceptibility of soils in the subgrades of road structures. The theoretical part compares the ways of testing the frost susceptibility in the Czech Republic and other selected countries of the European Union. Furthermore, it also deals with the development of the frost susceptibility index in the Czech Republic. The empirical part focuses on the laboratory testing of the frost susceptibility of the given sample of soil by the direct frost heave method. Moreover, it also deals with the simulation of penetration of frost by the subgrade and the possibility of shortening the length of the freezing during the direct testing the frost susceptibility.
|
|
|
Monitoring of the modulus of elasticity of the pavement subgrade
Hladík, Aleš ; Mondschein,, Petr (referee) ; Stehlík, Dušan (advisor)
This thesis deals with compares the procedures carried out in the cyclical load triaxial testing device according to CSN EN 13286-7, and the procedures performed in the United States of America. In the practical part elasticity moduls of mixed recycled material are experimentally compared with mixed recycled material containing binder(connective material) and with fine-grained soil in the cyclical load triaxial testing device. Further the thesis assesses the use of mixed recycled material in the construction of a third class low-load pavement.
|
|
| |
guest ::
