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Fibre distribution and tensile response anisotropy in sprayed fibre reinforced concrete

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journal contribution
posted on 12.02.2018 by Luis Segura-Castillo, Sergio Pialarissi-Cavalaro, Chris Goodier, Antonio Aguado, Simon Austin
Sprayed, steel fibre reinforced concrete (SSFRC) is a material that tends to present anisotropy. The shearing conditions of the spraying process induce preferential fibre orientation. Despite the extensive use of the material, no study has been found about the assessment of fibre distribution and its influence on the residual tensile strength of SSFRC. The objective of this work is to address such issue from a quantitative standpoint. An experimental program was performed with specimens extracted from different directions within a SSFRC panel. The fibre content and 3D orientation were quantified for each specimen using the inductive method. Then, the tensile behaviour was indirectly assessed for the same specimen through the Barcelona test. Results confirm the high level of anisotropy of SSFRC. The fibre orientation number parallel to the spraying direction is 3 times bigger than that found in the perpendicular direction. Similar differences were observed between the residual tensile response measured in those directions. Comparison of test results suggest that the preferential fibre orientation creates weaker planes that favours the increase of crack opening at lower load levels.

Funding

This work was supported by the Spanish Ministry of Science and Innovation through Research Project IPT F-00339 FIBHAC.

History

School

  • Architecture, Building and Civil Engineering

Published in

Materials and Structures

Citation

SEGURA-CASTILLO, L. ...et al., 2018. Fibre distribution and tensile response anisotropy in sprayed fibre reinforced concrete. Materials and Structures, 51 (1), Article 29.

Publisher

©Rilem. Published by Springer Verlag

Version

AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Acceptance date

28/01/2018

Publication date

2018

Notes

This is a post-peer-review, pre-copyedit version of an article published in Materials and Structures. The final authenticated version is available online at: https://doi.org/10.1617/s11527-018-1156-5

ISSN

1359-5997

eISSN

1871-6873

Language

en

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