Carbon reinforced concrete - execution
D - 18 Building and renovating with loam concrete
Within the scope of the diploma thesis, the combination of carbon reinforcement with clay concrete or sustainable concrete is to be investigated. In particular, the bond and the crack formation between concrete matrix and reinforcement are in the foreground. Due to the use of clay concrete or CO2-reduced concrete, the issue of sustainability is of particular importance. At the end of the work, different combinations of reinforcement and matrix are to be compared and scientifically evaluated.
With the beginning of the work, a literature research is to be carried out regarding the availability of the different materials. Based on the research, an experimental design is to be set up. The content of the diploma thesis is the fabrication, investigation, and evaluation of expansion body and single pull-out tests. On the basis of the experimental investigations, the theoretical approaches/results are to be verified and a statement made about the combination of carbon reinforcement and sustainable concrete.
Details of the task will be specified during the processing time.
Contact person:
Dipl. Ing. Enrico Baumgärtel
phone: 0351 463-42631
E-mail:
D - 17 Crack width calculation and crack width limitation of a textile reinforcement layer in case of tank farm surface rehabilitation
Many service station storage facilities located in Germany show local damage such as cracks and broken joints due to age, weathering and mechanical loads. The rehabilitation of these facilities, most of which cover large areas, is currently still carried out using reinforced concrete or asphalt. A new alternative is the rehabilitation of these surfaces with carbon concrete. Due to the special requirements on the layer to be reinforced, the crack width is of particular importance. On the basis of a selected tank farm area, the crack width calculation or the crack width limitation of a top concrete layer reinforced with carbon concrete is to be investigated in cooperation with a practical partner. The focus of this work is in particular on the investigation of crack formation, crack widths and crack width limitation of carbon concrete. The investigations can be carried out analytically. The individual focal points of the assignment can be adapted or specified to the interests of the student.
Contact person:
Dipl. Ing. Enrico Baumgärtel
phone: 0351 463-42631
E-mail:
D - 15 Structural design of carbon concrete - theoretical and experimental investigation
Compared to reinforced concrete, carbon concrete is still a relatively young building material. For this reason, some fundamental questions still need to be answered in the design and dimensioning as well as the structural implementation of carbon concrete components. Some of these fundamental questions regarding the structural design of carbon concrete components are to be answered within the scope of this work.
Contact person:
Dr.-Ing. Alexander Schumann
CARBOCON GmbH
E-mail:
Phone: 0351-48205511
Ammonstraße 72
01067 Dresden
D - 14 Design and calculation of carbon concrete components for new fields of application
Due to its numerous positive properties, carbon concrete has already established itself in many areas. Today, for example, facades, parking garages and bridges are built from carbon concrete. In addition, a large number of buildings have already been reinforced or repaired with carbon concrete. Nevertheless, there are still further fields of application for this innovative building material, which have, however, remained unnoticed. For one of these applications, various carbon concrete structures are to be designed, calculated and structurally implemented.
Contact person:
Dr.-Ing. Alexander Schumann
CARBOCON GmbH
E-mail:
Phone: 0351-48205511
Ammonstraße 72
01067 Dresden
D - 11 Analytical and experimental consideration of the anchoring effect of curved textile reinforcements to improve the composite properties of carbon concrete
The aim of this work is to develop concepts for the design of planar textile CFRP reinforcements in the end anchorage area of carbon concrete. With the help of these, the mechanical properties of CFRP are to be fully exploited over the shortest possible anchorage length and premature failure of the composite prevented. At the end of the work, different geometries are to be presented comparatively and investigated experimentally.
First of all, a literature research concerning the material behavior of CFRP and carbon concrete as well as the influence of the anchorage length of reinforcement in concrete is necessary. Based on the research, geometric shapes are to be designed and anchorage variants are to be developed after consultation with the supervisors. These are then to be compared with each other and preferred variants derived. The scope of the experiment will be determined during the work in consultation with the supervisors. At the end of the work, these geometries are to be prototypically inserted into a textile CFRP scrim and small structures subsequently concreted. The manufactured test specimens are to be investigated experimentally and their influences on the anchorage length and failure behavior are to be discussed.
Details of the task will be specified during the processing time.
Contact person:
Dipl.-Ing. Berk Gündogdu
Phone: 0351 463-39419
E-mail:
D - 9 Connecting elements for functionalized textile concrete sandwich panels
Textile concrete is a composite building material made of high-performance textile reinforcement (consisting of glass or carbon) and concrete. Textile concrete is particularly suitable for the production of filigree, thin-walled components, which is why it is becoming increasingly widespread for the construction of facade elements. Furthermore, due to new manufacturing technologies and material properties, there is the possibility of integrating further functionalities such as energy generation and storage in the facade. In addition to weather protection and aesthetics, the façade thus also performs important energy supply functions.
The use of thin, functionalized facade elements creates new requirements for the connecting elements. Building on existing developments, a new generation of connecting elements must therefore be developed that enables fast and safe assembly and disassembly of the elements. Within the scope of this work, fasteners are to be developed and investigated accordingly i) for fastening the sandwich element to the structure, ii) for fastening the individual sandwich layers to each other, and iii) for coupling the elements in the horizontal or vertical joint.
Based on experimental investigations of existing fasteners (in particular with the aid of so-called punching shear tests), existing fasteners are first to be tested for suitability and then structurally adapted. The focus of the work is based on the progress of the project and is determined in consultation with the student. The work mainly comprises the following steps:
- Research and prioritization of existing anchoring elements.
- Experimental investigation of existing anchoring elements
- Further development/adaptation of existing anchoring elements for the application "thin-walled, functionalized facade".
Contact person:
Marina Stümpel, M.Sc.
Phone: 0351 463 39820
E-mail:
D - 7 Installation parts Carbon concrete precast parts
The precast construction method is characterized, among other things, by high dimensional accuracy and component quality as well as fast construction progress. However, a prerequisite for the use of modular construction and its advantages are suitable installation parts for connecting, fastening and transporting.
Within the scope of the diploma thesis, research will first be carried out on installation parts in classic reinforced concrete construction. In particular, the functionalities as well as the advantages and disadvantages of the systems are to be presented. Subsequently, a requirement profile for installation parts - in particular fasteners - of filigree carbon concrete components is to be developed and possible solutions are to be established as well as their feasibility is to be examined with regard to structural-physical as well as static-constructive criteria.
Contact person:
Dr.-Ing. Harald Michler
Phone: 0351 463-32550
E-mail: Harald.Michler@tu-dresden.de
D - 4 Sandwich wall as a semi-precast part made of carbon concrete
The construction method using semi-precast reinforced concrete elements (filigree elements) is widely used, especially in multi-storey residential and non-residential construction. Due to the high degree of prefabrication and the short assembly time on site, the system is almost unrivaled. However, modular overall construction systems are in demand, especially due to current developments. For this purpose, this construction method also offers products such as the semi-precast double wall with integrated insulation (e.g. Syspro Thermowand). However, these components cannot be produced in economically viable wall thicknesses (d < 30 cm) due to the minimum concrete cover and insulation thicknesses (EnEV).
The world's largest research and development project in the construction industry - the C³ project - is currently concerned with the widespread market introduction of carbon concrete and thus also with the implementation of semi-precast wall systems.
Within the scope of the project or diploma thesis, the current state of knowledge on reinforced concrete double wall construction systems with and without insulation and in-situ concrete core is to be compiled first. Furthermore, the double wall element made of carbon concrete of the Technical University of Dresden is to be investigated theoretically and experimentally. As a result of the work, the dimensioning of the connecting means and the determination of the minimum shell thicknesses of the individual components as well as the applicability of the system and essential construction details are to be part of the work to be presented.
Contact person:
Dipl.-Wirtsch.-Ing. Matthias Tietze, M.A.
Phone: 0351 484 567 18
E-mail:
D - 3 Optimization of a ceiling slab for container construction
As part of a project funded by the German Federation of Industrial Research Associations (AiF), it was demonstrated at our institute that lightweight and slender balcony floor slabs can be manufactured and calculated with carbon concrete as an alternative to conventional solid reinforced concrete slabs [1]. In the course of the project, balcony floor slabs were loaded to failure and the load-bearing behavior was intensively investigated. It was shown that the developed structure has further load-bearing reserves and can thus be designed in a more material- and resource-efficient way. In order to make the carbon reinforced balcony slab more marketable, the thesis will optimize and evaluate the slab with regard to the following criteria:
- Construction, Statics
- architecture, aesthetics
- manufacturing costs
- economic efficiency
At the end of the work, there will be a balcony slab design that combines the requirements from the material-appropriate design, load-bearing capacity, serviceability, durability and economic efficiency in the best possible way.
Contact person:
Dr.-Ing Harald Michler
Phone: 0351 463-32550
E-mail:
D - 2 Anchoring, connection and overlapping of carbon or basalt bars with anchoring elements
Investigation of possible joining and anchoring methods for carbon and basalt rods. The focus of the work is on FE investigations in principle. Details will be determined depending on the current project status.
Attention: previous knowledge in FE as well as independent working methods are required.
Contact person:
Dr.-Ing. Harald Michler
Phone: 0351 463 32550
E-mail:
D - 1 sandwich structure of textile concrete
Possibilities of formation and dimensioning of sandwich structures made of textile concrete considering the structural boundary conditions.
Contact person:
Dr.-Ing. Harald Michler
Phone: 0351 463 32550
E-mail: