NEW MATERIALS

This paper outlines some new materials, and also some old but not yet widely accepted materials, that are being introduced into concrete structures. The two main methods of achieving reduced permeability and higher strength in concretes are: (1) the use of superplasticisers; and (2) the addition of microsilica to the concrete mix. In Germany and the USA, it has been common practice to seal the surface of new concrete bridges and similar structures with silanes or silane derivatives. Fusion-bonded epoxy-coated reinforcement has been used widely in bridges in the UK, USA, and Canada; although its application roughly doubles the price of reinforcing steel as delivered to site, its use adds little to total project cost and greatly improves durability. Stainless steel reinforcement has been used in several structures in aggressive environments; its use adds of the order of 10% to total cost. Several types of non-ferrous reinforcement have been developed as an alternative to conventional steel in traditional structures. Several man-made fibres have been used, especially glass, carbon, and aramid, all of which are stronger than steel and less liable to corrosion. Eurocrete is an international collaborative programme to develop and design fibre composite materials suitable for reinforcing concrete. For the covering abstract see IRRD 880139.

Language

  • English

Media Info

  • Pagination: 8 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00724171
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • ISBN: 0-7210-1495-X
  • Files: ITRD
  • Created Date: Aug 19 1996 12:00AM