This article describes how repairs were carried out to the severely corroded concrete structures on some elevated sections of the sanyo shinkansen express railway between osaka and hiroshima in Japan. In 1988, routine inspections revealed clear signs of concrete deterioration, including cracking of the concrete and corrosion of the reinforcement. This damage was caused by a combination of the presence of sea salt, alkali-silica reaction due to the use of crushed rock aggregate, and galvanic action. After about 200 tests had been made, the repair and coating system finally selected was the perma shield system, marketed in the UK under the name albri shield. The overall remedial procedure adopted was similar to that often used previously on structures repaired and protected with albri shield. Firstly, the brittle edges and loose concrete were removed and corroded rebars were exposed and cleaned. The good, exposed concrete was coated with m18 primer which was allowed to penetrate the surface fully and dry. The exposed steel was coated with albri shield u148 rust-preventing primer and allowed to harden. The excavated holes were then filled with aqua f polymer cement. Finally, further albri shield m18 and m28 coatings were applied. (TRRL)

  • Availability:
  • Corporate Authors:

    Palladian Publications Limited

    14 Park Street
    Windsor, Berkshire,   England 
  • Authors:
    • Chalkley, B
  • Publication Date: 1989-6

Media Info

  • Pagination: p. 32-3
  • Serial:
    • Volume: 3
    • Issue Number: 5
    • ISSN: 0967-0726

Subject/Index Terms

Filing Info

  • Accession Number: 00497816
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD, TRIS
  • Created Date: Sep 30 1990 12:00AM