UFRG - Unidirectional fibre reinforced grout as strengthening material for reinforced concrete structures

Author(s): R. Gião, V. Lúcio, C. Chastre, A. Brás
Paper category: Conference
Book title: 8th RILEM International Symposium on Fiber Reinforced Concrete: challenges and opportunities (BEFIB 2012)
Editor(s): Joaquim A.O. Barros
Print ISBN: 978-2-35158-132-2
e-ISBN: 978-2-35158-133-9
Publisher: RILEM Publications SARL
Pages: 1357 - 1369
Total Pages: 12
Language: English

The present study is part of an extensive research project, where the main objective is to evaluate a strengthening solution for reinforced concrete structures using a small thickness jacketing in the compression side of the RC element with unidirectional fibre reinforced grout - UFRG.

For this purpose a high performance cementitious grout reinforced with continuous and unidirectional non-woven fibremat has been developed. It was expected that the use of these type of fibres allowed an optimization of its percentage and orientation. Besides, for continuous fibres (with an aspect ratio, defined as the length-to-diameter ratio, l/d=∞), the composite should attain higher tensile strength since the fibre embedment length is enough to prevent fibre pullout.

The experimental campaign included a set of preliminary tests that allowed the design of the fibre reinforced grout, sustained with rheological parameters [7] and mechanical characterization tests of the materials.

Finally, an experimental campaign was carried out in order to proceed to the mechanical characterization of the unidirectional fibre reinforced grout. Compressive tests were conducted in small thickness tubular specimens that enable the determination of the compressive strength and the static modulus of elasticity of the material. The tensile strength of the material was obtained using splitting tests of cubic specimens (according the standard DIN 1048-5). The experimental results are presented and analysed.

Online publication: 2013
Publication Type: full_text
Public price (Euros): 0.00

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