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Evaluation of pull-out behaviour in textile reinforced concrete
RISE, SP – Sveriges Tekniska Forskningsinstitut, CBI Betonginstitutet AB. Chalmers University of Technology, Sweden.ORCID iD: 0000-0002-0033-1841
Chalmers University of Technology, Sweden.
RISE, SP – Sveriges Tekniska Forskningsinstitut, CBI Betonginstitutet AB.ORCID iD: 0000-0001-9867-7631
2014 (English)In: Proceedings of the 10th fib International PhD Symposium in Civil Engineering, Universite Laval , 2014, p. 97-102Conference paper, Published paper (Refereed)
Abstract [en]

Concrete reinforced with conventional steel is one of the most commonly used building materials, yet it has historically shown disadvantages in terms of durability and vulnerability to corrosion attack. Various remedial methods have been applied to overcome the shortcomings of this building material, such as increasing the concrete cover, which, however, leads to an increased self-weight of the structure. Over the past decade, Textile Reinforced Concrete (TRC), encompassing a combination of finegrained concrete and non-corrosive multi-axial textile fabrics, has emerged as a promising novel altemative offering corrosion resistance, as well as thinner and light-weight structures such as foot bridges and façade elements. Although TRC has been extensively researched, the formalization of experimental methods and design standards is still in progress. The aim of this paper is to quantify and model the bond behaviour of TRC basalt fibre meshes. The bond between the textile fibre mesh and fine-grained concrete matrix is a critical element influencing the overall performance of this composite material. The yam structure is rather complex including a multitude of outer and inner filaments; thus inevitably, the constituents of one yam are unevenly bonded to the concrete matrix. As such, experiments help quantify complex material behaviour which can be further used to develop and calibrate analytical and non-linear finite-element models. The bond behaviour of TRC was characterized through means of direct pull-out tests with un-symmetrical embedment lengths such that the test specimens were notched at a prescribed breaking point. The test specimens consisted of one-layer of reinforcement mesh, centrally cast, made of basalt fibres. The applied force and average deformation of the test specimen were measured. The evaluation of varying embedment lengths was explored in order to quantify pull-out and textile rupture failure modes. The experimental results were thereafter evaluated using an analytical 1 D bond model. Pull-out and rupture failure were observed in the experimental pull-out results. A local bond stress-slip curve was calibrated for the basalt specimens based on the experimental results. Finally, it was observed that the simulation results from the 1 D bond model had a reasonable correlation with the experimental results in spite ofthe complex bond behaviour of TRC.

Place, publisher, year, edition, pages
Universite Laval , 2014. p. 97-102
Keywords [en]
Basalt, Bond strength (materials), Building materials, Concretes, Corrosion, Corrosion resistance, Finite element method, Light weight structures, Mesh generation, Reinforced concrete, Textile fibers, Textile industry, Textiles, Complex materials, Concrete reinforced, Conventional steel, Critical elements, Experimental methods, Fine-grained concretes, Non-linear finite element model, Textile reinforced concretes, Structural design
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:ri:diva-45575Scopus ID: 2-s2.0-85015452593ISBN: 9782980676215 (print)OAI: oai:DiVA.org:ri-45575DiVA, id: diva2:1456851
Conference
10th International Federation for Structural Concrete (fib) International PhD Symposium in Civil Engineering 2014, 21 July 2014 through 23 July 2014
Note

Conference code: 126450

Available from: 2020-08-07 Created: 2020-08-07 Last updated: 2023-05-26Bibliographically approved

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Williams Portal, NatalieMalaga, Katarina

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