Technical Textiles as an Innovative Material for Reinforcing of Elements from High Performance Concretes (HPC)

2014 ◽  
Vol 1054 ◽  
pp. 110-115 ◽  
Author(s):  
Lenka Laiblová ◽  
Tomáš Vlach ◽  
Alexandru Chira ◽  
Magdaléna Novotná ◽  
Ctislav Fiala ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
High Performance ◽  
Glass Fibers ◽  
Textile Reinforced Concrete ◽  
Steel Reinforced Concrete ◽  
Technical Textiles ◽  
Engineering Steel ◽  
Innovative Material ◽  
Increasing Demand ◽  
Concrete Elements

In civil engineering, steel reinforced concrete is currently still the most widely used composite material. For broad spectrum of utilization is the most important combination of a high compressive and tensile strength [1]. The increasing demand for subtle concrete elements gave impetus to the development of the new materials for the reinforcement of concrete which are non-corrodible and thus do not need such a thick coating layer-technical textiles. These composite materials are known under the title Textile Reinforced Concrete – TRC. The current research reported the use of AR glass fibers reinforced material for HPC and comparison with other reinforced materials.

Realization of TRC Façades with Impregnated AR-Glass Textiles

2011 ◽  
Vol 466 ◽  
pp. 121-130 ◽  
Author(s):  
Josef Hegger ◽  
Christian Kulas ◽  
Michael Horstmann
Keyword(s):  
Composite Material ◽  
Reinforced Concrete ◽  
Production Process ◽  
Design Code ◽  
Textile Reinforced Concrete ◽  
Load Bearing ◽  
Steel Reinforced Concrete ◽  
Technical Textiles ◽  
Metallic Reinforcement ◽  
Bearing Behavior

In the last 30 years, façade-panels made of steel-reinforced concrete have become less attractive for architects and clients. Due to the metallic reinforcement, the insufficient concrete covers of former design code generations and hence the material-dependent corrosion, many cases of damage occurred. Using technical textiles for a new composite material, Textile Reinforced Concrete (TRC), it is possible to produce concrete structures which are not vulnerable to corrosion. The presented ventilated large-sized façade elements and self-supporting sandwich panels exemplify the capability of TRC. In the paper, applied materials are characterized and the production process of tailor-made textile reinforcements as well as the load-bearing behavior of the members is described.

Thin Lightweight Panels Made of Textile Reinforced Concrete

2017 ◽  
Vol 259 ◽  
pp. 238-243 ◽  
Author(s):  
Jakub Řepka ◽  
Tomáš Vlach ◽  
Lenka Laiblová ◽  
Petr Hájek ◽  
Michal Ženíšek ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
High Performance ◽  
High Performance Concrete ◽  
New Technology ◽  
Stress Test ◽  
Textile Reinforced Concrete ◽  
Minimum Thickness ◽  
Four Point Bending ◽  
New Applications ◽  
Concrete Elements

Use of high performance concrete with reinforcement made of technical textile is increasing and new applications are being found. This paper presents new technology for the lightening of the panels made of textile reinforced concrete, which is being developed. The main focus of this research is to produce concrete elements suitable for use as facade panels with the least possible weight and environmental impact. Mechanical characteristics were measured on testing specimens with thickness of 18 mm with lightening representing 47% of their volume. Minimum thickness of concrete was 4 mm and therefore the reinforcement was covered by approximately 1.5 mm of concrete matrix. The strength of experimental test panels was measured in four-point bending stress test. Due to one-sided lightening and asymmetrical cross-section therefore, the tests were performed in both directions. For better interpretation of the results were the specimens of lightened panels tested alongside non-lightened specimens with the same thickness. Based on measured values, maximal dimensions of lightened facade panels were designed.

scholarly journals Analyzing of Coatings on Steel - Reinforced Concrete Elements by Mobile NMR

2016 ◽  
Vol 62 (1) ◽  
pp. 65-82 ◽  
Author(s):  
J. Orlowsky
Keyword(s):  
Reinforced Concrete ◽  
Potential Effect ◽  
Building Site ◽  
Steel Reinforced Concrete ◽  
Mobile Nmr ◽  
The Individual ◽  
First Time ◽  
Concrete Elements ◽  
Non Destructive

Abstract A large number of infrastructural concrete buildings are protected against aggressive environments by coating systems. The functionality of these coating systems is mainly affected by the composition and thickness of the individual polymeric layers. For the first time ever, a mobile nuclear magnetic resonance (NMR) sensor allows a non-destructive determination of these important parameters on the building site. However, before this technique can be used on steel-reinforced concrete elements, the potential effect of the reinforcement on the measurement, i.e. the NMR signal, needs to be studied. The results show a shift of the NMR profile as well as an increase of the signals amplitude in the case of the reinforced samples, while calculating the thickness of concrete coating leading to identical results.

Biegetragverhalten getränkter textiler Bewehrungselemente für Betonbauteile/Bending Bearing Behavior of impregnated textile reinforcement for concrete elements

Bauingenieur ◽  
2015 ◽  
Vol 90 (06) ◽  
pp. 248-251
Author(s):  
Sergej Rempel ◽  
Christian Kulas
Keyword(s):  
Reinforced Concrete ◽  
Textile Reinforced Concrete ◽  
Concrete Elements ◽  
Bearing Behavior

Der Trend in der heutigen Bauwirtschaft zeigt einen wachsenden Bedarf an hochleistungsfähigen Materialien mit hohen Zug- und Druckfestigkeiten. Ein innovatives Baumaterial, das die Wünsche der Architekten und Tragwerksplaner befriedigt, ist der Textilbeton (Textile-Reinforced-Concrete (TRC)). Die Kombination aus hochfestem Beton und der korrosionsbeständigen Bewehrung, die gleichzeitig mit einer hohen Zugfestigkeit überzeugt, ermöglicht extrem schlanke Bauteile. Die bereits realisierten Textilbeton-Anwendungen bekräftigen die Anwendbarkeit des neuen Verbundwerkstoffes. Die weitere Entwicklung der textilen Bewehrung erweitert die Möglichkeiten für tragende Bauteile. Ein wichtiger Schritt war die Imprägnierung der Textilien mit Styrol-Butadien und Epoxidharz. Die Tränkung ermöglicht einen hohen Zuwachs der Zugfestigkeiten. Zusätzlich wird die Dauerhaftigkeit, Handhabung und Temperaturstabilität der Bewehrung erhöht. Folglich steigen die Effektivität und die Wirtschaftlichkeit der texilbewehrten Bauteile.   Der Beitrag stellt das Biegetragverhalten von Platten sowie Doppel-T Balken vor, die mit getränkten Textilien bewehrt wurden. Des Weiteren wird ein Bemessungsmodell für das Biegetragverhalten vorgestellt.

scholarly journals Flexural and Shear Tests on Reinforced Concrete Bridge Deck Slab Segments with a Textile-Reinforced Concrete Strengthening Layer

Materials ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 4210 ◽  
Author(s):  
Viviane Adam ◽  
Jan Bielak ◽  
Christian Dommes ◽  
Norbert Will ◽  
Josef Hegger
Keyword(s):  
Reinforced Concrete ◽  
High Performance ◽  
Large Scale ◽  
Shear Failure ◽  
Bridge Deck ◽  
High Strength ◽  
Shear Capacity ◽  
Strengthening Effect ◽  
Textile Reinforced Concrete ◽  
Carbon Fibre Reinforced Polymer

Many older bridges feature capacity deficiencies. This is mainly due to changes in code provisions which came along with stricter design rules and increasing traffic, leading to higher loads on the structure. To address capacity deficiencies of bridges, refined structural analyses with more detailed design approaches can be applied. If bridge assessment does not provide sufficient capacity, strengthening can be a pertinent solution to extend the bridge’s service lifetime. For numerous cases, applying an extra layer of textile-reinforced concrete (TRC) can be a convenient method to achieve the required resistance. Here, carbon fibre-reinforced polymer reinforcement together with a high-performance mortar was used within the scope of developing a strengthening layer for bridge deck slabs, called SMART-DECK. Due to the high tensile strength of the carbon and its resistance to corrosion, a thin layer with high strength and low additional dead load can be realised. While the strengthening effect of TRC for slabs under flexural loading has already been investigated several times, the presented test programme also covered increase in shear capacity, which is the other crucial failure mode to be considered in design. A total of 14 large-scale tests on TRC-strengthened slab segments were tested under static and cyclic loading. The experimental study revealed high increases in capacity for both bending and shear failure.

Designed Textile Reinforced Concrete Elements for Architectural Facade Applications

2015 ◽  
Vol 719-720 ◽  
pp. 171-176 ◽  
Author(s):  
Kevin Pidun ◽  
Michael Schulze
Keyword(s):  
Reinforced Concrete ◽  
State Of The Art ◽  
Textile Reinforced Concrete ◽  
Pilot Projects ◽  
Concrete Elements ◽  
Made In

By now the application of Textile Reinforced Concrete (TRC) for facade constructions can be considered as state of the art. Especially ventilated curtain walls made of TRC and sandwich elements made in combination of TRC-layers and foam cores recently are realized in pilot projects, which are predominantly located in Aachen, Germany. Textile reinforced concrete elements for architectural facade applications give new chances for architects and engineers design.

scholarly journals Effect of TRC and F/TRC Strengthening on the Cracking Behaviour of RC Beams in Bending

Materials ◽  
2021 ◽  
Vol 14 (17) ◽  
pp. 4863
Author(s):  
Edoardo Rossi ◽  
Norbert Randl ◽  
Tamás Mészöly ◽  
Peter Harsányi
Keyword(s):  
Reinforced Concrete ◽  
Reinforced Concrete Beams ◽  
Image Correlation ◽  
Test Results ◽  
Textile Reinforced Concrete ◽  
Limit States ◽  
Beneficial Effects ◽  
Existing Structures ◽  
Increasing Demand ◽  
Ultimate Limit

The increasing demand on the performance of existing structures, together with their degradation, is among the main drivers towards the development of innovative strengthening solutions. While such solutions are generally aimed at increasing the load-bearing capacity of structural elements, serviceability limit states also play an important role in ensuring the performance and durability of the structure. An experimental campaign was performed to assess the cracking behaviour of reinforced concrete beams strengthened with different typologies of Textile-Reinforced Concrete. The specimens were monitored using Digital Image Correlation (DIC) technology in order to obtain a quantitative evaluation of the evolution of the crack pattern throughout the whole test. Results show the beneficial effects of this retrofitting strategy both at ultimate limit states and serviceability limit states, provide detailed insights on the progression of damage in the specimens and highlight how different parameters impact the cracking behaviour of the tested elements.

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