RESCUE REPAIR

This article describes the restoration of England's oldest surviving concrete and iron bridge, at Homersfield, Norfolk. It was designed and built in 1869. Since 1971, it was used as a footpath and bridleway, and progressively deteriorated due to lack of maintenance. Its single span has a riveted iron framework, with a latticed beam spandrel and herring-bone lateral members to provide structural reinforcement to its concrete. One of the main causes of deterioration is the lack of waterproofing on its original deck. Saturation of the concrete with water caused extensive spalling, and exposed the iron reinforcement members, which corroded badly. When repairs began, the asphalt deck surface was removed, and the deck was waterproofed, with Fosroc Nitobond SBR added to the final mortar screed. This helped to provide an excellent bond to the concrete substrate, and improved its resistance to freeze-thaw cycles. The stone copings were removed and cleaned. The ornate cast-iron balustrades were removed and restored where possible. Concrete was repaired with various Rendoroc products. Where it had corroded badly, the exposed iron frame was first primed with Fosroc Nitroprime Zincrich, to prevent further corrosion.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/3831968
• Corporate Authors:

  Thomas Telford Limited

  London,   United Kingdom 
• Publication Date: 1995-11

Language

• English

Media Info

• Pagination: p. 34-5
• Serial:
  • Highways
  • Volume: 63
  • Issue Number: 8
  • Publisher: Alad Limited
  • ISSN: 0142-6168
  • Serial URL: http://www.highways-mag.co.uk

Subject/Index Terms

• TRT Terms: Bitumen; Bridge decks; Bridges; Cast iron; Corrosion; Deterioration; Material reinforcement; Reinforced concrete; Reinforcing materials; Repairing; Spalling; Walkways; Waterproofing
• Geographic Terms: United Kingdom
• ITRD Terms: 4963: Bitumen; 3455: Bridge; 3482: Bridge deck; 4533: Cast iron; 5252: Corrosion; 5255: Deterioration; 2720: Footway; 4794: Reinforced concrete; 3471: Reinforcement (in mater); 3635: Repair; 5231: Spalling; 8119: United Kingdom; 3375: Waterproofing
• Subject Areas: Bridges and other structures; Highways;

Filing Info

• Accession Number: 00719940
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD
• Created Date: Apr 26 1996 12:00AM