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.

scholarly journals Influence of the surface modification by sanding of carbon textile reinforcements on the bond and load-bearing behavior of textile reinforced concrete

2019 ◽  
Vol 289 ◽  
pp. 04006
Author(s):  
Cynthia Morales Cruz ◽  
Michael Raupach
Keyword(s):  
Surface Modification ◽  
Reinforced Concrete ◽  
Tensile Tests ◽  
Measuring System ◽  
Uniaxial Tensile ◽  
Testing Time ◽  
Textile Reinforced Concrete ◽  
Load Bearing ◽  
Surface Modified ◽  
Bearing Behavior

In the context of the application of carbon Textile Reinforced Concrete (TRC) layers for the durable repair of building surfaces, uniaxial tensile tests on rectangular TRC samples were carried out to compare the bond and load-bearing behavior of an epoxy-impregnated carbon textile and its surface modified version. The aim of the surface modification, consisting of a subsequent coating with epoxy resin and sanding with quartz sand, is the improvement of the composite material regarding crack width reduction and an increase of the load-bearing capacity. A total of 15 series were examined and the parameters: reinforcement type, orientation and ratio were varied. In addition, long-term load tests were conducted. An optical 3D-video measuring system in combination with a DIC-software was used, which allowed the analysis of the process of crack formation during the entire testing time. With the surface modified reinforcement the formation of approx. 1.5 times the number of cracks with averagely 33 % smaller crack widths and up to 50 % smaller crack spacings were observed, regardless of the ratio of reinforcement. The residual behaviour of the series subjected to a permanent load of 1500 MPa over 1000 h showed no reduction of the tensile stress compared to short-term tests.

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.

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.

Experimental and numerical investigation on the vertical bearing behavior of discrete connected new-type precast reinforced concrete floor system

2020 ◽  
Vol 23 (11) ◽  
pp. 2276-2291
Author(s):  
Rui Pang ◽  
Yibo Zhang ◽  
Longji Dang ◽  
Lanbo Zhang ◽  
Shuting Liang
Keyword(s):  
Reinforced Concrete ◽  
Bearing Capacity ◽  
Cover Plate ◽  
Load Bearing Capacity ◽  
Load Bearing ◽  
Concrete Floor ◽  
New Type ◽  
Vertical Bearing ◽  
Floor System ◽  
Bearing Behavior

This article proposes a new type of discrete connected precast reinforced concrete diaphragm floor system that consists of precast flat slabs and slab joint connectors. An experimental investigation of discrete connected new-type precast reinforced concrete diaphragm under a vertical distributed static load was conducted, and the effect of slab joint connectors on the load-bearing capacity was evaluated. Then, a finite element analysis of discrete connected new-type precast reinforced concrete diaphragm, precast reinforced concrete floors without slab connectors, and cast-in-situ reinforced concrete floor were performed to understand their working mechanism and determine the differences in load-bearing behavior. The results indicate that the load-bearing capacity and stiffness of discrete connected new-type precast reinforced concrete diaphragm increase considerably as the hairpin and cover plate hybrid slab joint connectors can efficiently connect adjacent precast slabs and enable them to work together under a vertical load by transmitting the shear and moment forces in the orthogonal slab laying direction. The deflection of discrete connected new-type precast reinforced concrete diaphragm in orthogonal slab laying direction is mainly caused by the opening deformation of the slab joint and the rotational deformation of the precast slabs. This flexural deformation feature can provide reference for establishing the bending stiffness analytical model of discrete connected new-type precast reinforced concrete diaphragm in orthogonal slab laying direction, which is vitally important for foundation of the vertical bearing capacity and deformation calculation method. The deflection and crack distribution patterns infer that the discrete connected new-type precast reinforced concrete diaphragm processes the deformation characteristic of two-way slab floor, which can provide a basis for the theoretical analysis of discrete connected new-type precast reinforced concrete diaphragm.

Load–bearing behaviour and simulation of textile reinforced concrete

2006 ◽  
Vol 39 (8) ◽  
pp. 765-776 ◽  
Author(s):  
J. Hegger ◽  
N. Will ◽  
O. Bruckermann ◽  
S. Voss
Keyword(s):  
Reinforced Concrete ◽  
Textile Reinforced Concrete ◽  
Load Bearing

scholarly journals Self-Healing of Cracked Textile Reinforced Concrete Layers

Proceedings ◽  
2019 ◽  
Vol 34 (1) ◽  
pp. 20
Author(s):  
Lenting ◽  
Orlowsky
Keyword(s):  
Reinforced Concrete ◽  
Concrete Structures ◽  
Reinforced Concrete Structures ◽  
Self Healing ◽  
Textile Reinforced Concrete ◽  
Steel Reinforced Concrete ◽  
Material Development ◽  
Inorganic Coating ◽  
Protection Layer ◽  
Crack Widths

Sustainable maintenance of existing steel-reinforced concrete structures becomes more important. Using non-reinforced sprayed mortar to maintain these structures often leads to cracks in this repair layer due to the alteration of crack widths in the ordinary structure. The water impermeability as well as the durability of the sprayed mortar will be reduced due to the described cracks. This presentation shows a solution for the described problem. The use of carbon yarns with a special inorganic coating as reinforcement in sprayed mortars leads to a self-healing of the arising cracks. Due to the inorganic coating applied on carbon yarns the excellent bond between mortar and yarn results in a fine distributed crack image with crack width below 0.1 mm. It is shown that these cracks heal themselves. Consequently we can provide a mainly mineral protection layer for existing steel reinforced concrete structures which is impermeably to water based solutions. The presentation focuses on the material development and characterization.

scholarly journals Flexural Performance of Prefabricated Ultra-High-Strength Textile Reinforced Concrete (UHSTRC): An Experimental and Analytical Investigation

Buildings ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 68
Author(s):  
Egodawaththa Ralalage Kanishka Chandrathilaka ◽  
Shanaka Kristombu Baduge ◽  
Priyan Mendis ◽  
Petikirige Sadeep Madhushan Thilakarathna
Keyword(s):  
Reinforced Concrete ◽  
High Performance ◽  
High Strength ◽  
Analytical Investigation ◽  
Experimental Program ◽  
Textile Reinforced Concrete ◽  
Load Bearing ◽  
Mesh Density ◽  
Potential Improvement ◽  
Analytical Program

Textile Reinforced Concrete (TRC) is a prefabricated novel lightweight high-performance composite material that can be used as a load-bearing or non-load-bearing component of prefabricated buildings. Making TRC with Ultra-High-Strength Concrete (UHSC) (≥100 MPa) can be considered as a potential improvement method to further enhance its properties. This paper investigated the performance of Ultra-High-Strength Textile Reinforced Concrete (UHSTRC) under flexural loading. A detailed experimental program was conducted to investigate the behavior of UHSC on TRC. In the experimental program, a sudden drop in load was observed when the first crack appeared in the UHSTRC. A detailed analytical program was developed to describe and understand such behavior of UHSTRC found in experiments. The analytical program was found to be in good agreement with the experimental results and it was used to carry out an extensive parametric study covering the effects of the number of textile layers, textile material, textile mesh density, and UHSTRC thickness on the performance of UHSTRC. Using a high number of textile layers in thin UHSTRC was found to be more effective than using high-thickness UHSTRC. The high modulus textile layers effectively increase the performance of UHSTRC.

Experimental Study on Residual Load Bearing Capacity of SRC Eccentric Columns after Exposure to Fire

2010 ◽  
Vol 163-167 ◽  
pp. 2240-2246 ◽  
Author(s):  
Jun Hua Li ◽  
Yue Feng Tang ◽  
Ming Zhe Liu
Keyword(s):  
Mechanical Properties ◽  
Reinforced Concrete ◽  
Bearing Capacity ◽  
Ultimate Strength ◽  
Room Temperature ◽  
Ultimate Load ◽  
Flexural Rigidity ◽  
Load Bearing Capacity ◽  
Load Bearing ◽  
Steel Reinforced Concrete

This paper provided three test data pertaining to the mechanical properties of steel reinforced concrete (SRC) eccentric columns after exposure to fire and one comparative test data pertaining to the mechanical properties of steel reinforced concrete columns at room temperature. The influence of eccentricity on failure mode, distortion performance and ultimate load bearing capacity are mainly studied. Test results show that the failure modes of steel reinforced concrete eccentric columns after exposure to fire are similar to that at room temperature. Strain along the section height at mid-span section of eccentric columns before loaded to 90% ultimate load bearing capacity is linearly distributed and well agree with the plane section supposition. After exposure to fire, the flexural rigidity and load bearing capacity of specimens are all declined compared with that at normal temperature. In various loading stages from the initial loading to 80% ultimate strength, the ratio of flexural rigidity of SRC eccentric columns after exposure to fire and at normal temperature is ranged from 0.30 to 0.59. With the same concrete strength and heating condition, the ultimate strength of specimens decreases with the increasing of eccentricity. The ultimate bearing capacity of all specimens at normal room temperature is calculated on the method proposed by Chinese regulation JGJ 138-2001. The compared results of experimental values and calculating values show that the residual load bearing capacity of SRC eccentric columns after exposure to fire is about 69% to 81% of that at room temperature.

Sign in / Sign up

Export Citation Format

Share Document