|
|
Sustainable Asphalt Recyclate Base Course
Spies, Karel ; Tanečková, Pavlína
In the construction industry nowadays, it is the concepts such as sustainability, recycling, emission and energy reduction which are coming to the fore. This article follows the same path, looking at the design of new, recycled road subbase layers. These layers are almost 100% composed of recovered reclaimed asphalt, crushed to the appropriate fraction. This reclaimed asphalt is either mixed with a suitable binder, heated to a low temperature, or a combination of both effects occurs. The research described in this paper is partially related to the newly developed standard ČSN 73 6147 Cold recycling of pavement structural layers [1]. The aim of this research is to economically and environmentally reuse reclaimed asphalts of lower quality, specifically in the subbase layer of pavements. Otherwise, this precious material is mainly used for the backfilling of roadsides.
|
|
|
Properties of asphalt mixtures with RAP
Trnka, Lukáš ; Coufalíková, Iva (referee) ; Dašek, Ondřej (advisor)
The bachelor thesis deals with the properties of asphalt mixtures with reclaimed asphalt. Possibilities of rejuvenate of binder contained in reclaimed asphalt are mentioned in the theoretical part. There is explained the principle of rejuvenators function, types of rejuvenators and ways of rejuvenators dosing into the asphalt mixture. The procedures for performing the stiffness modulus test (2PB-TR) and the low temperature (TSRST) test are described in the following part. Individual tests are evaluated and asphalt mixtures are compared in the practical part of bachelor thesis.
|
|
|
Design of asphalt mixtures with the use of higher amount of RAP
Pavličík, Petr ; Matoušek, David (referee) ; Varaus, Michal (advisor)
In the introduction of the Master’s thesis describes for obtaining and processing of reclaimed asphlalt. Major point of the thesis is design of asphalt mixtures with use of higher amount of RAP for asphalt binder course. Asphalt mixtures were designed with contents of 0%, 30%, 50% and 70% of RAP. On each asphalt mixtures were compared parameters set out by functional tests – resistence to permanent deformation and resistence to water.
|
|
|
Recycling of bituminous binders by using recycling agents
Koudelka, Tomáš ; Komačka,, Jozef (referee) ; Dašek, Ondřej (referee) ; Varaus, Michal (advisor)
Increasing the content of Reclaimed Asphalt in hot asphalt mixtures is one of the current issues in road construction, to which society's attention is paid. The higher content of Reclaimed Asphalt brings higher technological demands not only for the production of asphalt mixture plants, but also for the handling of materials in general. The benefit for higher demands on asphalt mixture production is the subsequent reduction of the environmental burden associated with the construction of road infrastructure caused by the mining industry and use of natural resources. The dissertation is focused on studying recycling agents which are used in the production of asphalt mixtures containing Reclaimed Asphalt. Emphasis is put on comparing the properties of recycled binders with paving bitumen and binders from Reclaimed Asphalts whereas the effect of repeated recycling is taken into account. A large part of the thesis is devoted to the design of the optimal dosage of recycling agents. Certain findings were used to draw a methodology describing the design of dosing of these agents. At the same time, the properties and behaviour of the recycling agents themselves were evaluated.
|
|
|
Properties of asphalt mixtures of SMA-type with RAP
Acuna Subia, Luis Carlos ; Hrbek, Kamil (referee) ; Varaus, Michal (advisor)
The aim of the diploma thesis is to verify and compare the properties of bituminous stone mastic asphalt, namely SMA 11S with modified PMB 45 / 80-55 asphalt binder or 50/70 road bitumen binder with rubber granulate. Comparison of properties is performed using functional tests. The thesis is divided into the theoretical and practical part. The theoretical part deals with the familiarization with the use of the SMA mixture, the selected concepts concerning recycling of non-leveled roads are described and described. Attention is paid especially to the recycling of roads in the Czech Republic with an emphasis on hot recycling on the incinerator, which allows increased dosing of Reclaimed Asphalt into asphalt mixtures. In the practical part, the results of the functional tests of the SMA 11S mixture, which have been taken from the test section, are processed and evaluated.
|
|
|
Milling of asphalt layers of pavements
Brida, Peter ; Hýzl, Petr (referee) ; Dašek, Ondřej (advisor)
The bachelor thesis is focused on the comparison of the influence of the milling machine movement speed on the properties of RAP (reclaimed asphalt pavement). The theoretical part describes issue of production and usage of RAP. The practical part evaluates the sieve size distributions of these materials and needle penetration and softening point of bitumen recovered from RAP samples.
|
|
|
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.
|
|
|
The influence of cold RAP addition on the resulting temperature of the asphalt mixture
Bocák, Tomáš ; Hýzl, Petr (referee) ; Dašek, Ondřej (advisor)
The aim of the bachelor thesis is to simulate the effect of dosing cold reclaimed asphalt into a hot aggregate mixture, under laboratory conditions. The theoretical part will describe the possibilities of reclaimed asphalt dosing in the production of asphalt mix, together with the principles for the design of a new asphalt mix. In the practical part, by my proposed procedure, the cold portion of aggregate will be mixed with the hot portion of aggregate. The measurements will result in the final aggregate mixture temperatures and their comparison.
|
|
|
Recycling of bituminous binders by using recycling agents
Koudelka, Tomáš ; Komačka,, Jozef (referee) ; Dašek, Ondřej (referee) ; Varaus, Michal (advisor)
Increasing the content of Reclaimed Asphalt in hot asphalt mixtures is one of the current issues in road construction, to which society's attention is paid. The higher content of Reclaimed Asphalt brings higher technological demands not only for the production of asphalt mixture plants, but also for the handling of materials in general. The benefit for higher demands on asphalt mixture production is the subsequent reduction of the environmental burden associated with the construction of road infrastructure caused by the mining industry and use of natural resources. The dissertation is focused on studying recycling agents which are used in the production of asphalt mixtures containing Reclaimed Asphalt. Emphasis is put on comparing the properties of recycled binders with paving bitumen and binders from Reclaimed Asphalts whereas the effect of repeated recycling is taken into account. A large part of the thesis is devoted to the design of the optimal dosage of recycling agents. Certain findings were used to draw a methodology describing the design of dosing of these agents. At the same time, the properties and behaviour of the recycling agents themselves were evaluated.
|
|
|
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.
|
guest ::
