A REPORT ON THE REPAIR OF THE BURNABY GENERAL HOSPITAL PARKING STRUCTURE, VANCOUVER, CANADA

The parking structure at Burnaby General Hospital consists of five floors and was built in 1975. An account is given of the methods used to conduct the condition survey and the methods and materials used for repair of the suspended reinforced concrete slabs. Evaluation of the structure included a visual survey with mapping of surface deterioration, a delamination survey, half-cell potential corrosion survey, pachometer survey, chloride ion profiling, depth of carbonation, compressive strength and density of concrete, petrographic evaluation and microscopic determination of air voids. From these surveys it was concluded that the main problem was inadequate cover to the reinforcing steel combined with chloride ion contamination. Repair involved raising the surface elevation by 35 mm in localised areas. Concrete was removed using hydromilling and waterblasting equipment at pressures up to 240 MPa. Silica fume ready mix concrete was used as the repair material to provide low chloride permeability and enhanced chemical resistance. Details are given of the concrete mix, placing, finishing, curing and subsequent sealing with a silane sealer.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/09670726
• Corporate Authors:

  Palladian Publications Limited

  14 Park Street
  Windsor, Berkshire,   England 
• Authors:
  • Neill, J
• Publication Date: 1989-12

Language

• English

Media Info

• Pagination: p. 24-26
• Serial:
  • CONSTRUCTION REPAIR
  • Volume: 3
  • Issue Number: 10
  • Publisher: PALLADIAN PUBLICATIONS LTD
  • ISSN: 0967-0726

Subject/Index Terms

• TRT Terms: Carbonation; Chlorides; Concrete; Corrosion; Density; Deterioration; Evaluation and assessment; Measurement; Mix design; Multistory structures; Parking garages; Petrography; Reinforced concrete; Repairing; Slabs; Strength of materials; Surveillance
• ITRD Terms: 7312: Carbonate; 4755: Concrete; 5252: Corrosion; 5908: Density; 5255: Deterioration; 9020: Evaluation (assessment); 7314: Halide; 6136: Measurement; 4714: Mix design; 924: Multi storey parking garage; 4060: Petrography; 4794: Reinforced concrete; 3635: Repair; 3491: Slab; 5544: Strength (mater); 9101: Surveillance
• Subject Areas: Bridges and other structures; Geotechnology; Highways; Maintenance and Preservation; Planning and Forecasting; Terminals and Facilities;

Filing Info

• Accession Number: 00606545
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: ITRD, TRIS
• Created Date: Mar 31 1991 12:00AM