DURABILITY OF SILICA FUME CONCRETES FOR HIGH-STRENGTH PRECAST PRESTRESSED CONCRETE BRIDGE GIRDERS IN ALBERTA . PROCEEDINGS OF THE 1989 ANNUAL CONFERENCE OF THE ROADS AND TRANSPORTATION ASSOCIATION OF CANADA, CALGARY, ALBERTA, SEPTEMBER 17-21, 1989

Durability tests used in this study include the following: 20-hour and 28-day compressive strength, 28-day flexural strength, resistance to freezing and thawing, scaling in the presence of deicing salt, and chloride permeability. The determination of air void parameters and their relationship to the durability of laboratory test specimens and the performance of selected in-service bridge elements is an integral part of the work. The results illustrate the difficulties in relating air void parameters to performance both in the field and in the laboratory. In the field, scaling does not correlate well with air content, spacing factor and specific surface (ASTM C457) in both the Alberta study and a larger similar study in the U.S. In the laboratory, the entrainment of air void systems in superplasticized silica fume concretes that comply with currently accepted criteria is shown to present no real difficulty with the particular admixtures employed. Howver, the results of durability tests show that scaling in particular may occur even when the air void system meets these criteria, that accelerated curing may increase scaling and chloride permeability, and that silica fume enhances resistance to scaling as well as impermeability to chloride. (Author/TRRL )

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/1895102103
• Corporate Authors:

  Transportation Association of Canada (TAC)

  401-1111 Prince of Wales Drive
  Ottawa, Ontario  Canada 
• Authors:
  • Johnson, D C
• Publication Date: 1989

Media Info

• Features: References;
• Pagination: p. B55-B75
• Serial:
  • Publication of: Transportation Research Forum
  • Publisher: Transportation Research Forum
  • ISSN: 1052-7524

Subject/Index Terms

• TRT Terms: Air voids; Chlorides; Concrete; Concrete bridges; Conferences; Durability; Girders; High strength concrete; Precast concrete; Prestressed concrete; Silica fume
• Uncontrolled Terms: Scaling
• Geographic Terms: Canada
• Old TRIS Terms: Air voids content
• ITRD Terms: 3455: Bridge; 8018: Canada; 8525: Conference; 4792: Precast concrete; 4796: Prestressed concrete
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00619691
• Record Type: Publication
• Source Agency: Transportation Association of Canada (TAC)
• ISBN: 1-895102-10-3
• Files: ITRD, TRIS
• Created Date: Mar 31 1992 12:00AM