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Low temperature properties of asphalt binders and mixtures
Veselý, Petr ; Koudelka, Tomáš (referee) ; Dašek, Ondřej (advisor)
Today’s society is highly reliable on a working road infrastructure, which is because of collective efforts already built in terms of main net of roadways, and the attention is now paid to its service life primarily from a point of view of a climate change which is causing more frequent temperature extremes. This thesis sets its goal to perform basic tests for bitumen, especially ones dealing with low temperature properties, on types of bitumen usually used in out day to day world and asphalt mixtures made with those types of bitumen. The theoretical part talks about the basic definition of bitumen and studies performed on the similar issue. Practical part of the thesis is focused on performing the tests of bitumen and asphalt, which include but are not limited to, penetration test, softening point test, critical temperature detected by method by Fraasse and the bending beam rheometer and the test to set critical temperature of asphalt by using TSRST. At the end of the thesis the evaluation of results and its mutual correlation is performed.
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Recycled aggregates to asphalt mixtures of the flexible pavements
Kropáč, Pavel ; Zdřálek, Petr (referee) ; Stehlík, Dušan (advisor)
This thesis deals with the theoretical part of the creation, distribution and recycling of construction and demolition waste. Subsequently covers made from these recycled construction and demolition waste and its potential application in structural layers of the pavement. In the practical part of the thesis deals with monitoring the overall properties of nine asphalt mixtures with different proportion of recycled concrete aggregate and asphalt binder, which are designed and intended for bed asphalt pavement. The recycled concrete aggregate and asphalt are performed various laboratory tests, the results are subjected to a comparison with the relevant standards and TP 210. The conclusion is made price comparisons of asphalt mixtures.
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Issue of asphalt mixtures with coarse-grained aggregates
Koblížek, Ondřej ; Hýzl, Petr (referee) ; Dašek, Ondřej (advisor)
The diploma thesis deals with the design of asphalt mixture of asphalt concrete type for base courses with maximum aggregate grain up to 32 mm and investigates the influence of the amount of asphalt binder on the properties of this mixture. The theoretical part describes the problem of aggregate shortage in the Czech Republic and the division of aggregates into various categories. In the next part, the laboratory used tests (needle penetration determination, softening point determination, compaction degree, determination of the stiffness modulus, low temperature properties and wheel tracking) are described in detail. The practical part describes the used materials, the results of the laboratory tests, their comparison and evaluation.
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Use of RAP in coarse-grained asphalt mixtures
Teslík, Jozef ; Dašek, Ondřej (referee) ; Hýzl, Petr (advisor)
The diploma thesis examines the possibilities of using R-material in coarse-grained asphalt mixtures for ACP32 base layers. The theoretical part deals with the availability of aggregates in the Czech Republic and also solves the issue of producing asphalt mixtures with a higher content of R-material. The theoretical part also compares the use of R-materials in the Czech Republic with other countries. The practical part deals with the design, production and testing of selected mixtures. To determine the properties of the mixtures, the rolling wheel tests, TSRST and the determination of the modulus of elasticity were selected.
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The use of glassgrids in asphalt pavement structure
Sadil, Dominik ; Šperka, Pavel (referee) ; Kudrna, Jan (advisor)
The bachelor thesis deals with the use of fiberglass grids in asphalt layers. These materials are used as reinforcement materials in road construction primarily to partially elimination or delay the formation of cracks in the roadway and to transfer the tensile loads that are distributed to the sub-layers. The bachelor thesis tests the properties asphalt layers reinforced by geogrids by using selected functional tests and also was monitored their behavior between asphalt layers. At the same time, the thesis determines whether these functional tests are practically applicable for asphalt layers with fiberglass grids.
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Usage of Rich Bottom Layers
Simkovič, Lukáš ; Hegr, Zdeněk (referee) ; Hýzl, Petr (advisor)
The aim of this diploma thesis is theoretical knowledge of the problems rich bottom layer and practical part of comparison of three asphalt mixtures for base layers using common road bitumen and modified rubber granulate. Selected functional laboratory tests (low temperature, fatigue resistance, bulk density) and stiffnes modules are performed on these mixtures and the results are compared to each other.
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Coarse-grained asphalt mixtures
Rimel, Jindřich ; Dašek, Ondřej (referee) ; Hýzl, Petr (advisor)
The diploma thesis investigates the properties of coarse-grained asphalt mixtures ACP 32, which are compared with the properties of ACP 22 mixtures. The theoretical part deals with the composition of asphalt mixtures, their production, transport and laying. Experience with using coarse-grained mixtures around the world is also presented. The practical part deals with mixture design, production and testing to assess the properties of the mixtures. The tests selected for the comparison of the properties are wheel tracking, TSRST and stiffness by a two-point bending test.
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Dependency of Asphalt Mixtures Low Temperature Properties on Binder Properties
Veselý, Petr
The paper deals with results of tests for low temperature properties of asphalt mixtures in correlation with results of tests on low temperature properties of the bitumen used in those. Properties of materials used in temperatures, which with changing climate keep approaching the critical value, are still very current topic, which cannot be overlooked. The aim of this paper is to point out the extent in which we can affect these properties with different binders. For this purpose, low temperature tests were carried out which include the thermal stress restrained specimen test to set critical temperature of asphalt mixture, Fraasse breaking point and the bending beam rheometer.
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Low temperature properties of asphalt binders and mixtures
Veselý, Petr ; Koudelka, Tomáš (referee) ; Dašek, Ondřej (advisor)
Today’s society is highly reliable on a working road infrastructure, which is because of collective efforts already built in terms of main net of roadways, and the attention is now paid to its service life primarily from a point of view of a climate change which is causing more frequent temperature extremes. This thesis sets its goal to perform basic tests for bitumen, especially ones dealing with low temperature properties, on types of bitumen usually used in out day to day world and asphalt mixtures made with those types of bitumen. The theoretical part talks about the basic definition of bitumen and studies performed on the similar issue. Practical part of the thesis is focused on performing the tests of bitumen and asphalt, which include but are not limited to, penetration test, softening point test, critical temperature detected by method by Fraasse and the bending beam rheometer and the test to set critical temperature of asphalt by using TSRST. At the end of the thesis the evaluation of results and its mutual correlation is performed.
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