FIRST BRIDGE DECK CAST IN MICROSILICA CONCRETE

It is described how silica fume, also known as microsilica, was used in casting the whole thickness of a bridge deck. Microsilica's pore-blocking property is being used to create impermeable overlays to protect rebar against corrosion in parking garages and bridge decks. A main concern was to prevent shrinkage cracks, and this was achieved by specifying fog nozzles to wet down the surface immediately after screeding and to keep it wet until the deck could support wet burlap. High-range water reducers (superplasticizers) were specified to improve workability. The country's firsts full-depth slab was laid by the Ohio Department of Transportation in a test section with 15% by weight of silica to cement in the mix. Analysis has shown that the impermeability and durability of the surface provided by the additive is satisfactory.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/08919526
• Corporate Authors:

  McGraw-Hill, Incorporated

  330 West 42nd Street
  New York, NY  United States  10036
• Publication Date: 1989-6-8

Media Info

• Pagination: p. 17-18
• Serial:
  • Engineering News-Record
  • Volume: 222
  • Issue Number: 23
  • Publisher: McGraw-Hill, Incorporated
  • ISSN: 0891-9526

Subject/Index Terms

• TRT Terms: Additives; Bridge decks; Concrete; Cracking; Durability; Moisture barriers; Overlays (Pavements); Parking garages; Pavements; Shrinkage; Silica fume; Water reducing agents
• Old TRIS Terms: Shrinkage cracks
• Subject Areas: Bridges and other structures; Geotechnology; Highways; Materials; Pavements; Terminals and Facilities; I32: Concrete;

Filing Info

• Accession Number: 00485149
• Record Type: Publication
• Files: TRIS, ATRI
• Created Date: Jun 30 1989 12:00AM