|
|
Dosage of rejuvenating agents to asphalt mixture with high content of RAP
Čumíčková, Markéta ; Coufalíková, Iva (referee) ; Dašek, Ondřej (advisor)
The diploma thesis is focused on the appropriate dosage of rejuvenating agents in asphalt mixtures with high content of RAP. The empirical and functional laboratory tests are described in the theoretical part. The practical part deals with the estimation of the optimal amount of rejuvenating agents by means of laboratory tests so that the rheological properties of the degraded asphalt binder can be restored by suitable dosing into the RAP. As part of the TAČR ZÉTA project, an experimental section of asphalt mixture containing 50 % of the RAP and an appropriate amount of the rejuvenating agents was created. The aim of the thesis is to find an optimal dosage of the rejuvenating agents in the samples of the RAP and laboratory aged asphalt binder of gradation 50/70, to determine the effectiveness of selected rejuvenating agents and to monitor changes in the parameters of the experimental section during the period of time.
|
|
|
Use of fluxing additives to modify the properties of asphalt binders
Šefránková, Radka ; Koudelka, Tomáš (referee) ; Dašek, Ondřej (advisor)
The subject of the thesis is to describe the effect of fluxing additives on the behaviour of asphalt binders. Emphasis will be placed on changes in rheological properties of asphalt binders at intermediate temperatures, stability during aging and influence of fluxing agents on their low-temperature properties. Theoretical part will deal with the principle of asphalt binders aging and it will summarize knowledge about fluxing additives. Further, empirical and functional tests will be described in order to evaluate asphalt binders. In the practical part, all laboratory tests will be evaluated and the effects of two different fluxing additives will be compared.
|
|
|
Influence of boundary conditions on the aging index of asphalt binders
Štohlová, Barbora ; Koudelka, Tomáš (referee) ; Dašek, Ondřej (advisor)
The bachelor thesis deals with an influence of several boundary conditions on the aging index of various modified asphalt binders. In the thesis there is rheology and modification of asphalt binders, types of ageing (short-term, long-term) and used tests (needle penetration, softening point, complex shear modulus, phase angle, aging tests) described. In the second part there is a brief description of used materials and comparison of the test results on these materials.
|
|
|
Interaction between asphalt binder and filler
Indráková, Kristýna ; Hýzl, Petr (referee) ; Dašek, Ondřej (advisor)
The thesis is mainly focused on comparison of properties of mastics, that were mixed in lab. The samples of mastics were mixed of paving bitumen in combination with 9 samples of backhouse filler, 1 inappropriate sample containing mica and 1 sample of additive filler. The folowing tests were used for assessment of samples: The particle density of filler-pyknometer method, The delta ring and ball test, The complex shear modulus and phase angle, The multiple stress creep and recovery test. The tests results were evaluated and compared. The results of the thesis are listed in the conclusion.
|
|
|
Influence of boundary conditions on the aging index of asphalt binders
Štohlová, Barbora ; Koudelka, Tomáš (referee) ; Dašek, Ondřej (advisor)
The bachelor thesis deals with an influence of several boundary conditions on the aging index of various modified asphalt binders. In the thesis there is rheology and modification of asphalt binders, types of ageing (short-term, long-term) and used tests (needle penetration, softening point, complex shear modulus, phase angle, aging tests) described. In the second part there is a brief description of used materials and comparison of the test results on these materials.
|
|
|
Use of fluxing additives to modify the properties of asphalt binders
Šefránková, Radka ; Koudelka, Tomáš (referee) ; Dašek, Ondřej (advisor)
The subject of the thesis is to describe the effect of fluxing additives on the behaviour of asphalt binders. Emphasis will be placed on changes in rheological properties of asphalt binders at intermediate temperatures, stability during aging and influence of fluxing agents on their low-temperature properties. Theoretical part will deal with the principle of asphalt binders aging and it will summarize knowledge about fluxing additives. Further, empirical and functional tests will be described in order to evaluate asphalt binders. In the practical part, all laboratory tests will be evaluated and the effects of two different fluxing additives will be compared.
|
|
|
Dosage of rejuvenating agents to asphalt mixture with high content of RAP
Čumíčková, Markéta ; Coufalíková, Iva (referee) ; Dašek, Ondřej (advisor)
The diploma thesis is focused on the appropriate dosage of rejuvenating agents in asphalt mixtures with high content of RAP. The empirical and functional laboratory tests are described in the theoretical part. The practical part deals with the estimation of the optimal amount of rejuvenating agents by means of laboratory tests so that the rheological properties of the degraded asphalt binder can be restored by suitable dosing into the RAP. As part of the TAČR ZÉTA project, an experimental section of asphalt mixture containing 50 % of the RAP and an appropriate amount of the rejuvenating agents was created. The aim of the thesis is to find an optimal dosage of the rejuvenating agents in the samples of the RAP and laboratory aged asphalt binder of gradation 50/70, to determine the effectiveness of selected rejuvenating agents and to monitor changes in the parameters of the experimental section during the period of time.
|
|
|
Interaction between asphalt binder and filler
Indráková, Kristýna ; Hýzl, Petr (referee) ; Dašek, Ondřej (advisor)
The thesis is mainly focused on comparison of properties of mastics, that were mixed in lab. The samples of mastics were mixed of paving bitumen in combination with 9 samples of backhouse filler, 1 inappropriate sample containing mica and 1 sample of additive filler. The folowing tests were used for assessment of samples: The particle density of filler-pyknometer method, The delta ring and ball test, The complex shear modulus and phase angle, The multiple stress creep and recovery test. The tests results were evaluated and compared. The results of the thesis are listed in the conclusion.
|
guest ::
