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Resistance of bituminous binder to ageing
Rous, Vojtěch ; Frýbort, David (referee) ; Kudrna, Jan (advisor)
Asphalt binder ageing and experiences with various ageing methods from abroad are described in this thesis. The practical part deals with the RTFOT aging and with the influence of the duration of this test. The comparison of test results is conducted before and after the aging by values of needle penetration, elastic recovery, softening point and resilience tests are evaluated and compared.
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Modification of asphalt mixtures
Zeleňák, Matej ; Hýzl, Petr (referee) ; Dašek, Ondřej (advisor)
This master’s thesis studies impact of direct-to-plant SBS polymer on properties of asphalt binder and asphalt mixture. It uses a new modification additive. The addition takes place directly during the mixing in the plant. This technology is not commonly used in Czech Republic. The theoretical part of this thesis describes current experiences with this method of modification. The procedures of laboratory tests needle penetration, softening point, elastic recovery, stiffness and low-temperature properties are described. The practical part presents values measured during preparation of test samples. Furthermore, it analyses the test results of the binders and mixtures in detail. The thesis concludes by evaluation of each test result and by summarization of the findings.
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Joint sealings of concrete pavements
Doseděl, Jan ; Hýzl, Petr (referee) ; Stehlík, Dušan (advisor)
The findings related to issues of joint sealings of concrete pavements are summarized in this bachelor thesis. The main part of this thesis deals with experimental testing of modified asphalt binder. This asphalt binder was tested at the beginning and at the end of fatigue. The samples of asphalt bitumen were tested by the method of ring and ball, determinativ of needle penetration, elastic recovery and resilince.
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Shear stress relaxation of bituminous binders in DSR
Musil, Vladimír ; Hegr, Zdeněk (referee) ; Dašek, Ondřej (advisor)
The thesis describes the relaxation properties of bituminous binders determined in dynamic shear rheometer (DSR). Paving bitumen, polymer modified bitumen (PMB) and crumb rubber modified bitumen (CRmB) were chosen for comparison. In order to describe the effects of ageing on asphalt binders relaxation properties, the laboratory simulation of ageing using RTFOT and 3xRTFOT method was performed. For each binder were simultaneously conducted tests of needle penetration, softening point and elastic recovery. Selected bitumens were used for the production of asphalt mixtures. The low-temperature properties tests (TSRST) were performed for these mixtures, when the results were compared to the relaxation properties of binders determined in the DSR.
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Evaluation of properties of PMB containing binder from RAP
Měšťanová, Petra ; Hýzl, Petr (referee) ; Dašek, Ondřej (advisor)
Subject of this diploma thesis is to describe the effect of adding different amount of aged binder recovered from RAP on the change of properties of polymer modified bitumen. The RAP containing unmodified bitumen and the RAP where we can expect bitumen modification are used to recover binder. The binder obtained from RAP is dosed into the virgin binder in amount of 15 %, 30 % and 50 %. The methods of recycling of flexible pavements, extraction and regeneration of asphalt binders, rejuvenating of their properties and methods of empirical and functional laboratory tests are described in the theoretical part. The practical part deals with evaluating and comparison of the results mixed binders properties.
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Influence of polymer modified bitumens storage on their properties
Měšťanová, Petra ; Fišer,, Jiří (referee) ; Dašek, Ondřej (advisor)
Subject of this bachelor’s thesis is to describe the influence of long-term storage of polymer modified bitumen at temperature of 180 °C on their properties. The principle of binder modification and test procedure of needle penetration, softening point, elastic recovery and dynamic viscosity in DSR will be explained in the theoretical part. The properties changes of five tested modified binders during storage will be evaluated and compared in the practical part.
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Possibility of mixing PMB RC type binders with reclaimed binder from RAP
Trnka, Lukáš ; Dašek, Ondřej (referee) ; Hýzl, Petr (advisor)
The diploma thesis deals with the possibility of mixing binders of the PMB RC type with a binder made of reclaimed ashalt. lists the types of asphalt binders, its production and modification are in the teoretical part. There is explained the principle of rejuvenators function, types of rejuvenators. The procedures for performing tests on asphalt binders: recovery of asphalt binder, needle penetration, softening point (ring and ball method), reversible ductility, breaking point (according to Fraass) and DSR. Individual tests are evaluated and asphalt mixtures are compared in the practical part of asphalt binder. The diploma thesis deals with the possibility of mixing binders of the PMB RC type with a binder made of reclaimed ashalt. lists the types of asphalt binders, its production and modification are in the teoretical part. There is explained the principle of rejuvenators function, types of rejuvenators. The procedures for performing tests on asphalt binders: recovery of asphalt binder, needle penetration, softening point (ring and ball method), reversible ductility, breaking point (according to Fraass) and DSR. Individual tests are evaluated and asphalt mixtures are compared in the practical part of asphalt binder.
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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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MSCR test in dynamic shear rheometer
Střasáková, Monika ; Coufalík, Pavel (referee) ; Kudrna, Jan (advisor)
The laboratory properties of bituminous binders in relation to permanent deformation are described in this bachelor‘s thesis. The principle and procedure of MSCR test will be explained in the theoretical part. The principle of empirical tests (needle penetration, elastic recovery and softening point) will be also described. The properties of four bituminous binders will be evaluated in practical part. The comparison of binders will be performed based on test results.
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