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Bonding in polypropylene fibre reinforced concretes
AbstractThe geometry of fibrillated polypropylene fibres after mixing in concrete, and the nature of the fibre interface in the hardened concrete, were characterised by optical and scanning electron microscopy, to resolve the bonding mechanisms in this system. It is suggested that two effects contribute to the fibre-matrix interaction: interfacial adhesion and mechanical anchoring. The first is apparently due to the intimate contact at the interface and the dense matrix developed in the transition zone, and the second is associated with a combination of: (a) filamentising, where the bundles separate into multifilament strands during mixing, (b) branching of the fibrils, and (c) forming of tiny fibrillations on the fibre surface, all of which can contribute to interlocking with the matrix.
Bonding in polypropylene fibre reinforced concretes
AbstractThe geometry of fibrillated polypropylene fibres after mixing in concrete, and the nature of the fibre interface in the hardened concrete, were characterised by optical and scanning electron microscopy, to resolve the bonding mechanisms in this system. It is suggested that two effects contribute to the fibre-matrix interaction: interfacial adhesion and mechanical anchoring. The first is apparently due to the intimate contact at the interface and the dense matrix developed in the transition zone, and the second is associated with a combination of: (a) filamentising, where the bundles separate into multifilament strands during mixing, (b) branching of the fibrils, and (c) forming of tiny fibrillations on the fibre surface, all of which can contribute to interlocking with the matrix.
Bonding in polypropylene fibre reinforced concretes
Bentur, A. (author) / Mindess, S. (author) / Vondran, G. (author)
1989-10-17
6 pages
Article (Journal)
Electronic Resource
English
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