Concrete durability in marine structures has not always been satisfactory. The author briefly reviews current research and development indicating the most important factors affecting durability. Careful specification of the mix constituents, attention to cover, compaction and covering, and in some circumstances, coating of steel and/or concrete can achieve satisfactorily acceptable structures. There are now several pozzolanic materials available. Fine ground granulated blast furnace slag, or condensed silica fume frequently are used. Silica fume and superplasticisers used together can reduce water cement ratios to 0.3 producing concrete with improved resistivity, and chloride ion resistant properties. The introduction of 'fly ash' silica fume and slag can also help to reduce voids by enhancing the flow and compaction properties. The coating of the concrete and the reinforced steel within it needs careful considerations of cost, performance and the abrasion to which the coating is to be exposed. Cathodic protection appears to have been very successful in improving the corrosion resistant properties of reinforcing steel. (TRRL) (Author/TRRL)

  • Availability:
  • Corporate Authors:

    Technical Publications Limited

    C.P.O. 3047
    Wellington,   New Zealand 
  • Authors:
    • Ryan, W G
  • Publication Date: 1990-8-1


  • English

Media Info

  • Pagination: p. 26-7
  • Serial:
    • Volume: 45
    • Issue Number: 7
    • Publisher: Institution of Professional Engineers New Zealand
    • ISSN: 0028-808X

Subject/Index Terms

Filing Info

  • Accession Number: 00623791
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Jul 31 1992 12:00AM