Prestressed concrete bridge beams with microsilica admixture : final report.

Details

• Alternative Title:
  Prestressed concrete bridge beams with microsilica admixture : final report : catching slough and rocky point birdges.
• Creators:
  Brooks, Eric W.
• Corporate Creators:
  Oregon. Dept. of Transportation. Research Unit
• Subject/TRT Terms:
  • Prestressed concrete bridges
  • Silica fume
  • Admixtures
  • Beams
  • Permeability
  • Concrete bridges
  • Chlorides
  • Steam curing
  • Silica fume admixture
  • mixrosilica
  More +
• Publication/ Report Number:
  OR-EF-98-12
• Resource Type:
  Tech Report
• Geographical Coverage:
  Oregon
• Corporate Publisher:
  Oregon. Dept. of Transportation. Research Unit
• Description:
  Microsilica fume admixture in concrete beams was used in two coastal bridges to reduce chloride permeability. Cylinders were cast from the beam mixture for strength and permeability tests.
  
  The fabricator found no problems with making these beams, except for the reduction in slump. After the beams were cast and cured they were transported from Harrisburg to the Oregon coast.
  
  The construction contractor reported no problems with the placement of the beams related to using microsilica. Although the results of the permeability test by AASHTO T277 were acceptable, they were higher than the silica fume supplier predicted. The producer obtained better results by using a steam cure method before testing the cylinders. The job was still considered a success and silica fume admixture is recommended for future concrete bridge construction.
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/22823/dot_22823_DS1.pdf
• File Type:
  [PDF - 1009.39 KB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:2e31a269660539356c110f20b6c741b401fec45e9d732fa0a91390c8b90b54fc9d65290c27647317433b2eda8fa2d135b4223baf8d8f1b3dd1350a03aa883635