120. Hybrid fibre reinforcement of ordinary or self-compacting concrete

Title: 120. Hybrid fibre reinforcement of ordinary or self-compacting concrete
Author(s): J.-L. Granju, V. Sabathier, M. Alcantara, G. Pons, M. Mouret
Paper category : conference
Book title: 6th International RILEM Symposium on Fibre Reinforced Concretes
Editor(s): M. di Prisco, R. Felicetti and G.A. Plizzari
Print-ISBN: 2-912143-51-9
e-ISBN: 2912143748
Publisher: RILEM Publications SARL
Publication year: 2004
Pages: 1311 - 1320
Total Pages: 10
Nb references: 6
Language: English

Abstract: A mix of rustproof fibres of complementary characteristics was investigated. The goal was the reinforcement of precast building parts capable of withstanding low stresses and sized to prevent handling distress.. These fibres are, firstly, amorphous metal fibres characterised by a high modulus and a high bond with the cementitious matrix, and, secondly, polypropylene fibres characterised by a lower modulus and a slipping post-crack behaviour. The results confirm that a mix of these two types of fibres combines the qualities of both. With their high bond and high modulus the amorphous metal fibres provide a delay, and additionally, an efficient restraint against cracking. With their slipping characteristics, the propylene fibres provide safety against catastrophic breaking. The results of direct tension tests show that, as a first approximation, the properties of the hybrid mix can be inferred from the properties of each constituent and their respective proportions through a simple mix-law. This investigation was carried out on ordinary and self-compacting concretes. The comparison between the two indicates a possibly better fibre-matrix bond in the case of self-compacting concrete.

Online publication: 2004-08-30
Publication type : full_text
Public price (Euros): 0.00