Assessment of fibre orientation in reinforced concrete using Fourier image transform.
In this study, ribbon-shaped amorphous cast-iron fibres were used to reinforce a concrete matrix. X-ray photographs have been taken to detect fibres in situ. Their orientation has been investigated by automatic image analysis methods. However, this measurement should not be influenced by the digitization on the square frame of the analyser. For that purpose, the Fourier transform was used rather than the rose of direction method. This analysis revealed the transverse isotropic nature of the spatial arrangement of these fibres, whose axis of revolution corresponds to the concrete casting axis. Such a morphological characterization of the fibre-reinforced concrete reveals its mechanical behaviour.
Redon
C
LERMAT - Laboratoire d'Etudes et de Recherches sur les Matériaux, URA CNRS 1317, ISMRA, 6, boulevard du Maréchal Juin, 14050 Caen Cedex, France; LRM2C - Laboratoire de Recherche sur les Matériaux de Construction de Caen, Groupe ESTP, Ecole Supérieure d'Ingénieurs des Travaux de la Construction de Caen, 1, rue Pierre et Marie Curie, 14610 Epron, France.
Chermant
L
Chermant
J
Coster
M