Rheological and mechanical development of a fiber-reinforced concrete for an application in civil engineering

Funke, Henrik; Gelbrich, Sandra; Ehrlich, Andreas; Krolls, Lothar

doi:10.15226/sojmse.2014.00111

Cited by 7 publications

(4 citation statements)

References 4 publications

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“…In the last couple of years, research in the fields of innovative concrete structures with high degree of lightweight design, and of textile reinforcement for special applications has been objective of intensive scientific and application-oriented efforts [1] [2] [3]. But, there is a lack of appropriate formwork systems to implement light shell structures of this kind, with the need for flexible mouldable, reusable systems being particularly tense [4].…”

Section: Concepts Of Lightweight Construction Arementioning

confidence: 99%

Function-Integrative Textile Reinforced Concrete Shells

Gelbrich¹,

Funke²,

Kroll³

2018

OJCM

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This paper presents the development and technological implementation of textile reinforced concrete (TRC) shells with integrated functions, such as illumination and light control. In that regard the establishment of material, structural and technological foundations along the entire value chain are of central importance: From the lightweight design idea to the demonstrator and reference object, to the technological implementation for the transfer of the research results into practice. The development of the material included the requirement-oriented composition of a high-strength fine grained concrete with an integrated textile reinforcement, such as carbon knitted fabrics. Innovations in formwork solutions provide new possibilities for concrete constructions. So, a bionic optimized shape of the pavilion was developed, realized by four connected TRC-lightweight-shells. The thin-walled TRC-shells were manufactured with a formwork made of glass-fibre reinforced polymer (GFRP). An advantage of the GFRP-formwork is the freedom of design concerning the formwork shape. Moreover, an excellent concrete quality can be achieved, while the production of the precast concrete components is simple and efficient simultaneously. After the production the new TRC-shells were installed and assembled on the campus of TU-Chemnitz. A special feature of the research pavilions are the LED light strips integrated in the shell elements, providing homogeneous illumination.

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Section: Concepts Of Lightweight Construction Arementioning

confidence: 99%

Function-Integrative Textile Reinforced Concrete Shells

Gelbrich¹,

Funke²,

Kroll³

2018

OJCM

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“…In contrast, the surface qualities are lower with extrusion than with spraying. Current research is concerned, for example, with suitable concrete formulations [2] and their characterisation [3], with adjustable fibre orientations [4], with machine control algorithms to overcome physical constraints and design concerns [3,5], and with the architectural possibilities that open up for structural components [6]. Various research projects focus on the development of an additive processing technology consisting of mixing, conveying and moulding as well as the integration of reinforcements made of fibres and fibre-reinforced plastics (FRP) into processable fresh concrete [e.g.…”

Section: Introductionmentioning

confidence: 99%

Additive manufacturing technology for the continuous production of precision concrete elements

Funke,

Lindner,

Rudolph

et al. 2023

ce papers

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This work reports about a combined additive manufacturing technology – concrete spraying and extrusion – for a continues production of precision concrete elements for modular civil construction. In order to achieve the goal, a fine‐grained concrete mix was developed that covers the technical production properties for both spraying and extrusion. In a next first step, a spray‐extrusion multi‐tool nozzle was developed and tested for spraying and extrusion of the fine‐grained concrete mixture. In addition to complete the robot‐assisted flow production process, force transmission elements were developed, which can be automatically integrated into the extruded concrete matrix in the non‐cured green state in accordance with the load. This holistic automated production technology opens new fields of application in the construction industry that were previously not possible with classic methods.

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“…Research in the fields of innovative concrete structures with high potential for lightweight design and of textile reinforcement for special applications has been object of intensive scientific- and application-oriented efforts for a couple of years (Brameshuber, 2006; Curbach and Scheerer, 2011; Funke et al, 2014b). There is a lack of appropriate formwork systems to implement light shell structures of this kind, with the need for flexibly moldable, reusable systems being particularly tense (Hofstadler, 2008).…”

Section: Introductionmentioning

confidence: 99%

Flexible fiber-reinforced plastic formworks for the production of curved textile-reinforced concrete

Gelbrich

Funke

Ehrlich

et al. 2017

Advances in Structural Engineering

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A new constructive and technological approach was developed for the efficient production of large-dimensioned, curved freeform formworks, which allows the manufacturing of single-and double-curved textile-reinforced concrete elements. The approach is based on a flexible, multi-layered formwork system, which consists of glass fiber-reinforced plastic. Using the unusual structural behavior caused by anisotropy, these glass fiber-reinforced plastic formwork elements permit a specific adjustment of defined curvature. The system design of the developed glass fiber-reinforced plastic formwork and the concrete-lightweight-elements with stabilized spacer fabric was examined exhaustively. Prototypical curved freeform surfaces with different curvature radii were designed, numerically computed, and produced. Furthermore, the fabric's contour accuracy of the fabric was verified, and its integration was adjusted to loads. The developed textile-reinforced concrete had a high three-point bending tensile strength. Beyond that it was ensured that the textile-reinforced concrete had a high durability, which has been shown by the capillary suction of deicing solution and freeze-thaw test with a low amount of scaled material and a relative dynamic E-modulus of 100% after 28 freeze-thaw cycles.

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Rheological and mechanical development of a fiber-reinforced concrete for an application in civil engineering

Cited by 7 publications

References 4 publications

Function-Integrative Textile Reinforced Concrete Shells

Function-Integrative Textile Reinforced Concrete Shells

Additive manufacturing technology for the continuous production of precision concrete elements

Flexible fiber-reinforced plastic formworks for the production of curved textile-reinforced concrete

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