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Properties of Reclaimed Asphalt Pavement Formed by Milling in Layers
Vavro, Filip ; Hýzl, Petr (referee) ; Šperka, Pavel (advisor)
The bachelor thesis focuses on assessing the properties of R-material, which originated from separate milling of asphalt pavement layers, and evaluating the influence of layer milling on the properties of R-material. The theoretical part of the thesis discusses the issues related to R-material. The practical part involves assessing the grain size lines of individual materials, extracting asphalt binder from samples, and conducting tests on the subsequently obtained binder.
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Properties of binders recovered from the wearing course of the test section
Skalková, Daniela ; Hýzl, Petr (referee) ; Dašek, Ondřej (advisor)
Subject of this bachelor’s thesis is, after seven years of use, the binders will be recovered from the cores taken on the test section, which is created from a wearing course composed of an asphalt mixture of the stone mastic asphalt type with reclaimed asphalt. The properties of the recovered binders will be evaluated using appropriately selected laboratory tests. The theoretical part deals with the aging of paving and polymer-modified bitumens, empirical and functional tests of asphalt binders are also described. The practical part contains the results of needle penetration tests, softening point using the ring-ball method and tests on a dynamic shear rheometer.
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Laboratory simulation of mixing PMB with reclaimed asphalt binder
Javorová, Marie ; Šperka, Pavel (referee) ; Dašek, Ondřej (advisor)
This thesis deals with the findings of the properties of the bituminous binder blends made by mixing the polymer modified bitumen with the hard paving bitumen in a range of proportions. This simulates production of the asphalt mixture with PMB containing RAP. The theoretical part describes the properties of the bituminous binder, polymer modified binders and the tests examining their properties and the principles of bitumen ageing. In the practical part the properties of mixed binders are determined using laboratory tests. The determined characteristics are then compared with the short-term aged binder according to the RTFOT method.
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Resistance of asphalt binder and asphalt mixture against deformation
Dubšíková, Karolína ; Coufalík, Pavel (referee) ; Dašek, Ondřej (advisor)
Subject of this bachelor´s thesis is to describe laboratory properties of asphalt binders in relation to permanent deformation. The principle and procedure of empirical tests needle penetration and softening point will be explained in the theoretical part. The principle and procedure of MSCR test will be also described. The properties of four asphalt binders will be evaluated in practical part. These binders will be used for production of asphalt mixtures, which will be subjected to wheel tracking test and their results will be compared.
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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.
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Influence of aged bituminous binder on the properties of polymer modified bitumens
Pecha, Marek ; Koudelka, Tomáš (referee) ; Varaus, Michal (advisor)
This bachelor thesis deals with problematics of polymer modified binders specially designed for production of asphalt mixtures containing Reclaimed Asphalt. These polymer modified binders are referred to in the literature as PMB RC (polymer modified bitumen for recycling). The first part of the thesis is focused on obtaining different types of PMB RC from various european producers. These binders were subsequently tested using empirical tests of asphalt binders for the classification purposes according to ČSN EN 14023. In the next part of the thesis the influence of the addition of aged asphalt binder on the properties of individual PMB RC was assessed. Mixing of binders was done to simulate the production of asphalt mixture in a mixing plant, where the binder of the Reclaimed Asphalt and the freshly added binder are mixed together. An assessment of the effect of the aged binder on PMB RC behavior was also carried out using conventional asphalt binder tests.
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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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