|
|
Optimization of the concrete composition with the use of recycled concrete aggregates
Skriňáková, Eva ; Holák, Michal (referee) ; Hela, Rudolf (advisor)
Concrete as a building material is subject to continuous innovation and thanks to advanced technology and quantum of research, its properties are still improved. It is logical that the more concrete we produce, the more waste it arises. The volume of this waste can not be stored in landfills endlessly, nowadays most of the waste economies in the world are trying to recycle concrete rubble. The recycling is not such a problem, the technology has been long verified but the quality of the recycled concrete aggregate is unquestionably one of the primary assumption which leads to accomplish required properties of concrete. In fact, the recycling process is „crushing“ the concrete into particles with an effort to eliminate the cement paste on the surface of the aggregate. An ideal solution would be create a resistant and firm coating that would adhere perfectly to the cement matrix. This diploma thesis is focused on the properties of recycled concrete aggregate and methods of improvement and optimization of the concrete mix composition.
|
|
|
Study of durability of concrete with recycled concrete and brick
Voráč, Jiří ; Hela,, Vlastimil (referee) ; Hela, Rudolf (advisor)
This bachelor thesis deals with issues of recycled concrete. The theoretical part describes the process of recycling the construction and demolition waste and describes requirements for recycled aggregate and recycled concrete in Czech republic and some of the member states of EU. The experimental part is focused on design of concrete with a substitution of coarse aggregate with a recycled concrete and brick aggregate.
|
|
|
Study the possibility of using recycled aggregate concrete for the manufacture of structural concrete
Skriňáková, Eva ; Stehlík, Dušan (referee) ; Hela, Rudolf (advisor)
This bachelor's thesis is aimed on the issues of using aggregate from recycled concrete rubble. The introduction describes the possibilities of concrete recycling and methods for fresh and hardened composite recycling. Next mentioned are physical and mechanical properties of recycled aggregate reused in concrete and comparison with natural aggregate concrete. Last part of theoretical section presents the opportunities of using recycled concrete to sub-base layers and concrete pavements. The practical section is focused on the application of recycled concrete aggregate to design concrete mixture of required strength class and verifying the possibility of usage in the exposure class XF3 and also design hydraulically bound course. The results of the practical section is to determine the suitability of recycled concrete usage for concept mentioned above.
|
|
|
Possibilities of using recycled aggregates for the production of structural concrete
Hrachovcová, Ludmila ; Brožovský, Jiří (referee) ; Hubáček, Adam (advisor)
The bachelor thesis deals with the study of recycled aggregates and concretes made from them. Nowadays, more and more emphasis is being placed on recycling waste and especially construction and demolition waste. Therefore, we are looking for ways to use recycled aggregates in concrete composites despite heterogeneous parametres of concrete and brick recyclates. The paper summarizes the existing knowledge about recycled aggregates, especially about brick and concrete recyclates, their parameters and possibilities of their use. Furthermore, the thesis deals with brick and concrete recyclate concretes, their parameters and behaviour and their subsequent use in practice.
|
|
|
Study of the possibilities of using coarse aggregates from recycled concrete for the production of structural concrete
Voráč, Jiří ; Novosad, Petr (referee) ; Hela, Rudolf (advisor)
The master thesis is focused on the possibilities of using coarse recycled concrete aggregate as a substitution for coarse natural aggregate in structural concrete. Theoretical part of this thesis presents a literature review on the recycled concrete aggregate, mainly its production and use in structural concrete. Emphasis is placed on standards in Czech Republic, Europe and other countries of the world. Influence of recycled concrete aggregate on fresh and hardened concrete are also described. Experimental part is dedicated to determination of basic mechanical properties of recycled concrete aggregate and natural aggregate. Recycled concrete formulas and reference concrete formulas are also proposed. Proposed concrete mixes are subjected to tests for fresh and hardened concrete. The price of concrete mixes per 1 m3 is also described.
|
|
|
Study of durability of concrete with recycled concrete and brick
Voráč, Jiří ; Hela,, Vlastimil (referee) ; Hela, Rudolf (advisor)
This bachelor thesis deals with issues of recycled concrete. The theoretical part describes the process of recycling the construction and demolition waste and describes requirements for recycled aggregate and recycled concrete in Czech republic and some of the member states of EU. The experimental part is focused on design of concrete with a substitution of coarse aggregate with a recycled concrete and brick aggregate.
|
|
|
Optimization of the concrete composition with the use of recycled concrete aggregates
Skriňáková, Eva ; Holák, Michal (referee) ; Hela, Rudolf (advisor)
Concrete as a building material is subject to continuous innovation and thanks to advanced technology and quantum of research, its properties are still improved. It is logical that the more concrete we produce, the more waste it arises. The volume of this waste can not be stored in landfills endlessly, nowadays most of the waste economies in the world are trying to recycle concrete rubble. The recycling is not such a problem, the technology has been long verified but the quality of the recycled concrete aggregate is unquestionably one of the primary assumption which leads to accomplish required properties of concrete. In fact, the recycling process is „crushing“ the concrete into particles with an effort to eliminate the cement paste on the surface of the aggregate. An ideal solution would be create a resistant and firm coating that would adhere perfectly to the cement matrix. This diploma thesis is focused on the properties of recycled concrete aggregate and methods of improvement and optimization of the concrete mix composition.
|
|
|
Study the possibility of using recycled aggregate concrete for the manufacture of structural concrete
Skriňáková, Eva ; Stehlík, Dušan (referee) ; Hela, Rudolf (advisor)
This bachelor's thesis is aimed on the issues of using aggregate from recycled concrete rubble. The introduction describes the possibilities of concrete recycling and methods for fresh and hardened composite recycling. Next mentioned are physical and mechanical properties of recycled aggregate reused in concrete and comparison with natural aggregate concrete. Last part of theoretical section presents the opportunities of using recycled concrete to sub-base layers and concrete pavements. The practical section is focused on the application of recycled concrete aggregate to design concrete mixture of required strength class and verifying the possibility of usage in the exposure class XF3 and also design hydraulically bound course. The results of the practical section is to determine the suitability of recycled concrete usage for concept mentioned above.
|
guest ::
