Carbon reinforced concrete - research
C - 22 Investigations of reinforcements made from recycled carbon filaments
The recycling of carbon components has become increasingly important due to the rising demand for carbon fibers. It is essential to recycle end-of-life carbon components. As part of this project, a literature review on carbon component recycling methods will be conducted. The findings shall be then summarized and analyzed. The focus is on compiling international sources. Based on the literature investigation, experimental tests on reinforcements made of recycled carbon filaments shall be then planed, performed, and the results shall be evaluated.
Sub-tasks of the thesis are:
- literature research on possibilities of processing carbon components both nationally and internationally
- literature research on recycled carbon filaments and the semi-finished tools made from them
- Planning, implementation, and evaluation of tests with reinforcements made from recycled carbon filaments.
Contact person:
Dipl.-Ing. Enrico Baumgärtel
Phone: +49 351 463-42631
E-Mail:
C - 19 Numerical Simulation of Carbon-Reinforced Concrete Flexural Members
In the past decade, various studies have been conducted on the structural members constructed with carbon-reinforced concrete (CRC). However, there is limited research available regarding the structural performance in the event of a fire. As part of the current ongoing research, numerical studies have to be carried out on the CRC members subjected to standard fire conditions.
The study will be carried out using numerical analysis software, specifically using the Finite Element Method (FEM). The advantage of FEM is that it produces results quickly, and is also cost-effective at the same time. The ABAQUS or ATENA software is proposed to create models for the numerical investigation. By implementing numerical analysis in this research work, parametric studies are to be carried out, such as the effect of the concrete cover, fire duration, and fire proofing material and it is very practical to use different parameters to improve understanding the behavior of CRC flexural members.
Furthermore, within the framework of FEM analysis, a series of different models is to be created to simulate real-life situations. This includes models specifically exposed solely to fire conditions, those subjected to the combined challenges of fire and loading simultaneously, as well as models subjected to first enduring the fire conditions and then subjected to loading conditions. In numerical models, standard fire curves such as ISO834 should be considered. Concerning the goal of this study, the main objective is to validate the finite element modeling of CRC members with experimental results, when exposed to a standard fire condition.
Details of the task will be specified depending on the current project status.
This research work is available for both project and master thesis.
Contact person:
Nazaib Ur Rehman, M.Sc
Phone: 0351-46340473
E-Mail:
C - 18 Experimental study on the Fire Performance Analysis of Carbon-Reinforced Concrete Flexural Members
This research work focuses on investigating the fire performance of thin carbon reinforced concrete (CRC) flexural elements. As part of this research, full-scale fire tests will be carried out under standard conditions in a dedicated fire testing laboratory in accordance with established standards and regulations such as DIN EN 1365-2 and DIN EN 1365-3 (to be specified prior to work), which are relevant to the determination of the fire resistance of structural members.
The research study primarily examines the CRC elements subjected to bending loads. To comprehensively assess their performance, a set of tests will be carried out on specimens without exposure to fire, serving as a baseline for load-bearing capacity. In parallel, tests involving CRC elements exposed to fire will be executed to understand how fire affects their behavior and, subsequently, their load-bearing capacity.
The aim of the study is to evaluate and measure the influence of fire exposure on the structural behaviour of CRC flexure members. This research is critical to understand the fire resistance of CRC elements and can contribute significantly to the development of safer and more resilient building elements and practices in fire prone environments. At the end of the work, a comprehensive test report will be produced which will include all relevant information on the test methodology, design, procedures and results, ensuring that the report is clear and compliant with standards.
Details of the task will be specified depending on the current project status.
This research work is available for both project and master thesis.
Contact person:
Nazaib Ur Rehman, M.Sc
Phone: 0351-46340473
E-Mail:
C - 16 Set up of one (more) design tools for carbon concrete with parameter studie
Description There are many commercially available software programs for the design of reinforced concrete members. For carbon concrete there are none available yet. For this reason, design tools for individual verifications are to be developed within the scope of the work. In addition, various parameter studies are to be carried out with the help of these.
Contact person:
Dr.-Ing. Alexander Schumann
CARBOCON GmbH
E-mail:
Phone: 0351-48205511
Ammonstraße 72
01067 Dresden
C - 15 Establishment of a calculation approach for the composite joint load-bearing capacity between the old concrete and the reinforcing layer in carbon concrete-reinforced structural elements
The reinforcement of existing reinforced concrete components is one of the fields of application for the composite material carbon concrete. The basic suitability of the material for reinforcement has already been successfully demonstrated several times. However, the problem with reinforcement is often that, due to the performance of the carbon concrete, the composite joint between the old concrete and the reinforcement has a decisive influence on the failure. More in-depth considerations will be carried out in the course of this work.
Contact person:
Dr.-Ing. Alexander Schumann
CARBOCON GmbH
E-mail:
Phone: 0351-48205511
Ammonstraße 72
01067 Dresden
C - 14 Investigations into the rotational capability or ductility of carbon concrete components
Due to its many positive properties, carbon concrete has established itself as an alternative to reinforced concrete construction in both reinforcement and new construction. However, some issues have not yet been finally clarified. One open issue for new buildings made of carbon concrete is the definition or specification of a ductility criterion. Since the pure carbon reinforcement has a linear-elastic material behavior, the valid ductility criteria from reinforced concrete construction cannot be transferred to carbon concrete. This problem is to be dealt with within the scope of the diploma thesis.
Contact person:
Dr.-Ing. Alexander Schumann
CARBOCON GmbH
E-mail:
Phone: 0351-48205511
Ammonstraße 72
01067 Dresden
C - 12 Increasing the stability of slender structures made of carbon reinforced concrete
With the considerable reduction in thicknesses in carbon reinforced concrete construction compared to conventional reinforced concrete construction, the issue of stability is increasingly gaining in importance. Within the scope of the diploma thesis, it will be investigated which aspects of stability (global buckling, local buckling) can be decisive for carbon reinforced concrete and by which structural measures (e.g. stiffeners, beading etc.) stability can be improved.
First of all, a literature review on stability needs to be carried out, taking into account studies from (steel reinforced) concrete construction and structural steel engineering. Based on the results, an experimental program is to be derived. For the experimental investigations, the test procedure is to be planned, the test specimens and the test rig are to be prepared, and initial tests will be carried out and evaluated. The experimental investigations will be used to verify the theoretical approaches/results and to demonstrate the effectiveness of stability-enhancing measures.
Contact person:
Dipl.-Ing. Josiane Giese
Phone: 0351 463-39815
E-mail:
C - 7 Presentation and comparison of different methods for characterizing the composite behavior of impregnated textile reinforcements in composite carbon concrete
The bond behavior of the composite material carbon concrete can be described by means of the bond stress-slip relationship (VSB). This relationship is used in practice to calculate end-anchorage and lap lengths. The bond between the textile reinforcement and the concrete is based on different mechanisms such as positive, adhesive and frictional connection.
In this work, different methods for characterizing the composite behavior of carbon concrete will be compared both theoretically and experimentally. The methods already used in the scientific community to determine the CDB are to be compared and their respective approaches to describing the bonding mechanisms are to be presented.
First of all, a literature review is to be carried out with regard to the existing methods for describing the bond behavior of carbon concrete. National and international research findings are to be taken into account. Subsequently, the main differences will be pointed out and discussed scientifically. The experimental test setups for determining the CDB are to be compared with each other both theoretically and practically. For this purpose, different pull-out tests will be carried out on different textiles.
Finally, a suitable test setup is to be derived on the basis of the findings obtained.
Contact person:
Dr.-Ing. Alexander Schumann
CARBOCON GmbH
E-mail:
Phone: 0351-48205511
Ammonstraße 72
01067 Dresden
C - 5 Stress on built-in parts Carbon concrete
When using carbon reinforcement in precast construction, a reduction in component thicknesses to a few centimeters can be achieved. However, the use of built-in components familiar from reinforced concrete, such as fasteners and transport anchors, remains indispensable and is reinforced by the increased use of the precast concept.
The development of fasteners for joining slender carbon concrete components requires, among other things, knowledge of the mechanical stresses that occur. For this reason, component- and use-specific loads in the coupling areas are to be investigated. The result of the diploma thesis is to be a clear presentation of possible actions and the forces and moments to be transmitted derived from them.
Contact person:
Dr.-Ing. Harald Michler
Phone: 0351 463-32550
E-mail:
C - 2 Prestressed reinforcement made of carbon, glass and basalt
Possibilities and boundary conditions for the manufacture and use of prestressed textile reinforcements. The focus of the work is on FE investigations in principle or, alternatively, an experimental approach. 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: