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Title: Fibre distribution and tensile response anisotropy in sprayed fibre reinforced concrete
Authors: Segura-Castillo, Luis
Cavalaro, Sergio H.
Goodier, Chris I.
Aguado, Antonio
Austin, Simon A.
Keywords: Sprayed concrete
Fibre reinforced concrete
Fibre distribution
Residual tensile behaviour
Issue Date: 2018
Publisher: ©Rilem. Published by Springer Verlag
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.
Abstract: 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.
Description: This paper is in closed access until 01 Feb 2019.
Sponsor: This work was supported by the Spanish Ministry of Science and Innovation through Research Project IPT F-00339 FIBHAC.
Version: Accepted for publication
DOI: 10.1617/s11527-018-1156-5
URI: https://dspace.lboro.ac.uk/2134/28480
Publisher Link: https://doi.org/10.1617/s11527-018-1156-5
ISSN: 1359-5997
Appears in Collections:Closed Access (Architecture, Building and Civil Engineering)

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