Collaborative research on carbon reinforced concrete structures in the <scp>CRC</scp>/<scp>TRR</scp> 280 project

Beckmann, Birgit; Bielak, Jan; Bosbach, Sven; Scheerer, Silke; Schmidt, Christopher; Hegger, Josef; Curbach, Manfred

doi:10.1002/cend.202100017

Cited by 40 publications

(31 citation statements)

References 26 publications

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“…Thus, for expansive concrete with carbon textile reinforcement another standard procedure is needed. The currently ongoing research project, “Chemical prestressing of folded and shell‐type carbon‐concrete structures” within the Collaborative Research Centre/Transregio 280 “Design Strategies for Material‐Minimised Carbon Reinforced Concrete Structures—Principles of a New Approach to Construction,” 25 aims to propose such a method.…”

Section: Discussionmentioning

confidence: 99%

Distributed strain measurements in thin expansive concrete slabs with biaxial textile reinforcement

Zdanowicz

Beckmann

Marx

2022

Civil Engineering Design

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The objective of the paper is to analyze the shrinkage and expansion strain development in thin slabs made of expansive concrete and reinforced with carbon textile reinforcement. The symmetrical textile reinforcement grid provided a biaxial restraint for the concrete shrinkage and expansion. Strains of the slabs were measured with distributed fiber optic sensors (DFOS) in both directions so that a 2D visualization of their distribution can be presented and analyzed. Parallel, standard restrained expansion tests (RET) were conducted to assess the expansive concrete mixture and large‐scale beam specimens with uniaxial steel reinforcement were also equipped with DFOS and analyzed. This study aimed to compare the strains in uniaxially restrained elements with steel reinforcement and biaxially restrained textile reinforced concrete elements, in order to assess to what extent the results of the standard RET can be used for evaluation of textile reinforced concrete members.

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Section: Discussionmentioning

confidence: 99%

Distributed strain measurements in thin expansive concrete slabs with biaxial textile reinforcement

Zdanowicz

Beckmann

Marx

2022

Civil Engineering Design

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“…Sustainability here means above all increasing energy and resource efficiency. Fibre-reinforced plastic composites (FRP), for example, for textile construction [1,2] or injection moulding applications [3,4], have great potential for the implementation of resource-saving and energy-efficient lightweight construction solutions due to the diverse possibilities of adapting their properties to the application requirements. With such solutions, advantages can be achieved, especially for components with complex geometry, if it is possible to reduce the previously high manufacturing costs of preforming with several, partly manual process steps and/or manufacturing steps [5,6].…”

Section: Introductionmentioning

confidence: 99%

Development of a method and technology for the production of 3D knitted reinforcement grids

Zierold

Steinberg

Hahn

et al. 2022

Fibres &Amp; Textiles in Eastern Europe

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The use of fibre-reinforced plastic composites (FRP) for lightweight construction solutions is becoming increasingly important. The processing of 2D scrims into complete 3D FRP components has been carried out with the help of complex manual assembly steps. The disadvantages of this procedure are distortions in the textile and, thus, deviations in the fibre alignments from the calculated load path. This paper presents a newly developed basic technology for the production of 3D reinforcing grids with variable warp and weft yarn section lengths based on multiaxial warp knitting technology. For this purpose, a new type of machine module and associated control technology for the production of weft yarn reserves on a multiaxial warp knitting machine was developed. In combination with technology from previous research work on the production of warp yarn lengths suitable for component contours, a basis was created for the production of 3D reinforcing grids.

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“…Frenzel et al provide detailed information about the design, production, and assembling processes [6]. Further collaborative research on carbon reinforced concrete structures is currently being carried out in a Transregio project (TRR 280), focussing on further structural optimization [7].…”

Section: Introductionmentioning

confidence: 99%

Advanced Carbon Reinforced Concrete Technologies for Façade Elements of Nearly Zero-Energy Buildings

et al. 2022

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The building sector accounts for approx. 40% of total energy consumption and approx. 36% of all greenhouse gas emissions in Europe. As the EU climate targets for 2030 call for a reduction of greenhouse gas emissions by more than half compared to the emissions of 1990 and also aim for climate neutrality by 2050, there is an urgent need to achieve a significant decrease in the energy use in buildings towards Nearly Zero-Energy Buildings (nZEBs). As the energy footprint of buildings includes the energy and greenhouse gas consumption both in the construction phase and during service life, nZEB solutions have to provide energy-efficient and less carbon-intensive building materials, specific thermal insulation solutions, and a corresponding design of the nZEB. Carbon reinforced concrete (CRC) materials have proven to be excellent candidate materials for concrete-based nZEBs since they are characterized by a significantly lower CO2 consumption during component production and much a longer lifecycle. The corresponding CRC technology has been successively implemented in the last two decades and first pure CRC-based buildings are currently being built. This article presents a novel material system that combines CRC technology and suitable multifunctional insulation materials as a sandwich system in order to meet future nZEB requirements. Because of its importance for the life cycle stage of production, cost-efficient carbon fibers (CF) from renewable resources like lignin are used as reinforcing material, and reinforcement systems based on such CF are developed. Cutting edge approaches to produce ultra-thin lightweight CF reinforced concrete panels are discussed with regard to their nZEB relevance. For the life cycle stage of the utilization phase, the thermal insulation properties of core materials are optimized. In this context, novel sandwich composites with thin CRC layers and a cellular lightweight concrete core are proposed as a promising solution for façade elements as the sandwich core can additionally be combined with an aerogel-based insulation. The concepts to realize such sandwich façade elements will be described here along with a fully automated manufacturing process to produce such structures. The findings of this study provide clear evidence on the promising capabilities of the CRC technology for nZEBs on the one hand and on the necessity for further research on optimizing the energy footprint of CRC-based structural elements on the other hand.

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Collaborative research on carbon reinforced concrete structures in the CRC/TRR 280 project

Cited by 40 publications

References 26 publications

Distributed strain measurements in thin expansive concrete slabs with biaxial textile reinforcement

Distributed strain measurements in thin expansive concrete slabs with biaxial textile reinforcement

Development of a method and technology for the production of 3D knitted reinforcement grids

Advanced Carbon Reinforced Concrete Technologies for Façade Elements of Nearly Zero-Energy Buildings

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