Carbon-reinforced concrete (CRC) - execution
Table of contents
D - 22 Prestressed precast CRC floor slab
Full title: 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, Ammonstr. 72, 01067 Dresden
0341 39285 627
D - 11 Anchoring of curved textile reinforcement
Full title: Analytical and experimental investigation of the anchoring effect of 2-D shaped textile reinforcements to improve the bonding properties of carbon-reinforced concrete
The aim of this work is to develop concepts for the shape design of flat textile reinforcements made of CFRP (carbon fiber reinforced polymer) in the end-anchoring area of carbon-reinforced concrete (CRC) elements. With the help of these concepts, it shall be possible to fully utilize the mechanical properties of CFRP over the shortest possible anchorage length and to prevent premature failure of the composite CRC.
First, literature research regarding the material behavior of CFRP and CRC as well as the influence of the anchoring length of reinforcement in concrete is required. Based on this study, geometric shapes are to be designed and anchoring variants are to be developed in consultation with the supervisor. These will then be compared with each other and preferred variants for the experiments will be derived. The scope of the experiment is determined during the work in consultation with the supervisor. In the last part of the work, the preferred geometries are to be prototypically incorporated into a textile CFRP fabric and then small structures are to be concreted. The manufactured test specimens will be examined experimentally. A comparative discussion of the influences on the anchorage length and the failure behavior concludes the study.
Details of the task will be specified during the processing time.
Contact person:
Dipl.-Ing. Berk Gündogdu
0351 463 39419