By J.L. Clarke
Metal has frequently been included into concrete buildings to beat its restricted tensile power. Corrosion of the metal reinforcement or prestressing approach is a massive challenge, relatively in competitive environments, with severe implications for the integrity and sturdiness of the concrete constitution. essentially the most promising ways to this challenge contains alternative of the metal with man-made fibres. during this publication, a world panel of authors presents an authoritative review of the topic, bringing jointly all facets of the advance of different reinforcing fabrics, and describing their homes and around the world purposes. Civil and structural engineers considering concrete layout and development, fabrics researchers and complex scholars will locate this publication a finished, up to date and necessary resource of reference.
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Extra resources for Alternative Materials for the Reinforcement and Prestressing of Concrete
7 Limitations It has been suggested that localised damage to the coating can lead to concentrated corrosion damage. However, it has been shown in tests that little corrosion takes place at the localised points and that red rust does not form . A further limitation is that coated reinforcement cannot be welded without destroying the coating. Systems have been developed for coating complete fabricated cages; these are discussed in the following section. Doubts have been expressed concerning the performance of epoxy coated reinforcing bars in fire.
6. 7. 8. J. , Collapse of Ynys-y-Gwas bridge, West Glamorgan. Proc. Inst. Civil Eng. 84 (1988) 635–669. , The performance of concrete in practice: a field study of highway bridges, Transport and Road Research Laboratory, Contractor Report 43, 1987. , Concrete in the oceans: coordinating report on the whole programme, Offshore Technology Report OTH 87,248, HMSO, 1989. , FBECR, The need for correct specification and quality control. Concrete 23(8) (1989). N. , Durability of corrosion resisting steels in concrete.
It is assumed that the zinc coating is sufficiently stiff such that the bond characteristics of the bar are unaltered and hence anchorage and lap lengths are unchanged. Galvanised reinforcement is included in ACI 318  but no special provisions are made. 3 Durability Work on corrosion-resisting reinforcing steels carried out by Treadaway et al.  included some specimens containing galvanised reinforcement. ) They found that galvanised steel showed significantly improved durability, when compared with standard high yield reinforcement, in carbonated concrete or in the presence of low levels of chloride.