Carbon reinforced concrete - execution
D - 22 Development of a slender, prestressed precast floor slab with carbon reinforcement
Prestressed concrete hollow and prestressed TT slabs are very material-efficient and lightweight structures and make an important contribution to sustainability. Nevertheless, they must meet the requirements for durability, serviceability and load-bearing capacity. In building construction, the specifications for sound insulation and fire protection must also be complied with. Prestressing steel is currently used for prestressing. An alternative are carbon fabrics, which can be prestressed in strips and, compared to prestressing steel, allow thinner cross-sections, i.e. slimmer chords and webs.
The aim of the student project is to develop a slender, technically feasible, prestressed precast floor slab using carbon fabrics that is as resource- and material-efficient as possible. A parameter study will analyze which materials and geometries are most suitable for various practical applications. The student will be supervised by the architecture and engineering office Kahnt & Tietze, which develops innovative building systems with various partners. A workplace can be provided both in the office in Dresden and in Leipzig.
Contact person:
Dr.-Ing. Michael Frenzel
Kahnt & Tietze GmbH
E-Mail:
Phone: 0341-39285 627
Ammonstr. 72
01067 Dresden
D - 21 Optimization of Heatable Carbon Concrete Prefabricated Elements for Static Rehabilitation of Airport Pavements
The STL Böden+Design GmbH and STL Heizsysteme GmbH, as manufacturers and executing entities, have specialized in the development and distribution of highly resilient, heatable floors. This study aims to improve the structural composition of prefabricated elements through analytical verification, potentially supplemented by numerical simulation. The objective is to tailor these elements to the practical load case scenarios encountered on airport pavements. Consequently, the goal of this research is to achieve load-dependent component optimization supported by subsequent laboratory investigations, building upon prior research findings.
The following tasks are to be completed:
- Literature review on the subject of high-load outdoor heating systems.
- Understanding of regulations and standards pertaining to airport pavements.
- Identification of critical structures within heating composite systems.
- Selection and coordination of suitable laboratory investigations to establish a comprehensive dataset.
- Simulation for estimating critical stresses and load scenarios within the composite based on collected data.
- Development of concepts to enhance the structural integrity of the components.
Contact person:
Dipl. Ing. Enrico Baumgärtel
Phone: +49 351 463-42631
E-Mail:
Dr.-Ing. Chongjie Kang
Phone: +49 351 463-37305
E-Mail:
D - 20 Conducting a Simulation between a Conventional Hybrid Bridge with Surface Heating System and a Bridge Made of Carbon Concrete Modules with Integrated Heating
STL Böden+Design GmbH and STL Heizsysteme GmbH, as manufacturers and executing entities, have specialized in the development and distribution of highly resilient, heatable floors. This study builds upon prior investigations regarding the feasibility of producing heated prefabricated components for use as surface systems for cycling and pedestrian bridges. Based on existing results, a simulation will be conducted to compare the technical and economic aspects of employing conventional concrete prefabricated elements with heating coatings against carbon concrete prefabricated elements with integrated heating function in hybrid bridges. Additionally, existing designs of conventional hybrid bridges can be utilized.
The following tasks are to be completed:
- Calculation of manufacturing and assembly costs dependent on production techniques for bridge constructions (conventional and made of carbon concrete).
- Comparison of various execution variants.
- Assessment of the advantages and disadvantages of the respective systems.
Contact person:
Dipl. Ing. Enrico Baumgärtel
Phone: +49 351 463-42631
E-Mail:
Dr.-Ing. Chongjie Kang
Phone: +49 351 463-37305
E-Mail:
D - 19 Optimization of the production of heated prefabricated components made of carbon concrete as a modular construction kit for pedestrian and bicycle bridges
The STL Böden+Design GmbH and STL Heizsysteme GmbH, as manufacturers and executing entities, have specialized in the development and distribution of highly resilient, heatable floors. The goal of this work is to improve the structural design of prefabricated components through analytical verification and numerical simulation. These modular construction kits are designed to adapted to bridges for cycle and pedestrian traffic. The project aims to test the functionality of a prototype upon completion.
The following tasks are to be completed:
- Literature research on the topic and regulations regarding bicycle and pedestrian bridges
- Load-oriented component optimization of the prefabricated components
- Development of concepts to improve the component structure
- Selection and implementation of the preferred variant
Contact person:
Dipl. Ing. Enrico Baumgärtel
Phone: +49 351 463-42631
E-Mail:
Dr.-Ing. Chongjie Kang
Phone: +49 351 463-37305
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
Mohorner Str. 13
01159 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
Mohorner Str. 13
01159 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 - 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: