Repair and strengthening of large structures

This article presents the use of sprayed concrete in large scale repair applications. Flexural strength is improved by the incorporation of polypropylene or stainless steel fibres: other specialist chemicals can be added to reduce rebound and minimise wastage. Pre-blended products are formulated for specific performance, such as sulfate resistance, fast setting, low shrinkage or high early strength. Dry application can be made by sprayed concrete pumps while wet-spray materials are applied with concrete or mortar mixing equipment for speed and ease of use on large structures. A case study is given where sprayed concrete was used to reline the Borrodale Tunnel, a rail tunnel in Scotland.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00105317
• Authors:
  • SMITH, B
• Publication Date: 2007-2

Language

• English

Media Info

• Pagination: p24
• Serial:
  • CONCRETE
  • Publisher: THE CONCRETE SOCIETY
  • ISSN: 0010-5317

Subject/Index Terms

• TRT Terms: Admixtures; Deflection; Equipment; Manufactures; Repairing; Shotcrete; Strength of materials; Tunnels
• Uncontrolled Terms: Use
• ITRD Terms: 4736: Admixture; 5586: Deflection; 3674: Equipment; 3647: Manufacture; 3635: Repair; 4730: Shotcrete; 5544: Strength (mater); 3374: Tunnel; 9084: Use
• Subject Areas: Bridges and other structures; Construction; Maintenance and Preservation; Materials; I32: Concrete; I54: Construction of Tunnels; I61: Equipment and Maintenance Methods;

Filing Info

• Accession Number: 01051129
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD
• Created Date: Jun 11 2007 1:28PM