The Influence of short glass fibres on the working capacity of textile reinforced concrete

Title: The Influence of short glass fibres on the working capacity of textile reinforced concrete
Author(s): M. Butler, R. Hempel, M. Schiekel
Paper category : conference
Book title: ICTRC'2006 - 1st International RILEM Conference on Textile Reinforced Concrete
Editor(s): J. Hegger, W. Brameshuber and N. Will
Print-ISBN: 2-912143-97-7
e-ISBN: 2351580087
Publisher: RILEM Publications SARL
Publication year: 2006
Pages: 45 - 54
Total Pages: 10
Nb references: 12
Language: English

Abstract: In the range of large deformations, some properties of the compound material Textile Reinforced Concrete (TRC) can be improved by a simple subsequent polymer coating of the yarn giving a significantly higher working capacity. In contrast, maximum load transfer is required in the range of small deformations, especially just before and immediately after the first cracking of the concrete. But only an insignificantly improved maximum load is obtained by yarn coating. A pronounced improvement can be realised, however, by applying a combination of multifilament yarns and short glass fibres. Investigations have been performed adding short glass fibres with selected cutting lengths of 6 and 12 mm, respectively, to a concrete matrix lightly reinforced by unidirectional AR multifilament yarns. The total short glass fibre volume has been varied from 0.2 to 0.6 % by volume in the specimens. The maximum load transfer and load-deformation behaviour has been determined using centric tensile tests.
The obtained results confirm a significant improvement of the load-deformation behaviour properties. The load-bearing effects can be described by a superposition of two reinforcement systems, short fibres and multifilament yarn, respectively. The influence of short glass fibres dominates in the region of small deformations, while the effect of the load transfer from the multifilament yarns predominates at larger cracking widths. Both, the maximum fibre pull-out force and the load-bearing capacity of the compound material improve clearly. In the case of constant fibre volume, the short fibres with greater length become more effective. Also the load transfer is enhanced by increasing the fibre volume content keeping the fibre lengths constant. The pseudo-ductility of the TRC is preserved, leading to working capacities enlarged up to more than 100 %.

Online publication: 2006-06-02
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2351580087.005